pams grid code

8/16/2019 Pams Grid Code

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Central Electricity Board

Grid Code

forSmall Scale Distributed Generation

SSDG)

CEB ’s pole

PV module

CEB’s Customer

Wind turbine

Grid Tie Inverter

9 t h December 2010


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Foreword

The purpose of this document is to assist the public to better understand the procedure forapplication, the requirements of the Grid Code, the Feed-in-Tariffs and other related issuesregarding Small Scale Distributed Generation (SSDG).

Any prospective applicant willing to take advantage of the Small Scale Distributed Generation(SSDG) Scheme is informed that:

I. Compliance to this Grid Code is mandatory

II. The provisions of the Electricity Act shall be adhered to.


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Chapter 1: Purpose of Grid Code ........ .......... ......... .......... ......... .......... ......... .......... ......... .......... 1

Chapter 2: Connecting SSDG to the grid .................................................................................. 2

Chapter 3:Grid Code requirements and Safety Aspects ......... .......... ......... .......... ......... ........ 3-13

Annex 1: Abbreviations and definitions ......... ......... .......... ......... .......... ......... .......... ......... ... 14-15

Annex 2: Feed-in-Tariff (FIT) ........... .......... ......... .......... ......... .......... ......... .......... ......... ......... .. 16

Annex 3: CEB fees ......... .......... ......... ......... .......... ......... .......... ......... .......... ......... .......... ......... 17

Annex 4: SSDG Application Form ......... .......... ......... .......... ......... .......... ......... ......... .......... . 18-20

Annex 5: SSDG Certificate of Installation ......... .......... ......... ......... .......... ......... .......... ......... ..... 21

Annex 6: SSDG Certificate of Commissioning ................. ......... .......... ......... .......... ......... ........ 22

Annex 7: SSDG Connection Agreement ......... ......... .......... ......... ......... .......... ......... .......... . 23-29

Table of Contents


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The Grid Code describes the technical criteria and requirements for interconnection of SmallScale Distributed Generators (SSDG) with CEB‟s low voltage network systems.

The Grid Code addresses connection of electricity producers for the following categories:

smaller than 17 kW (single or three phase output)

greater than 17 kW but less than or equal to 50kW (three phase output only)

The total installed capacity of SSDGs is limited to 2MW or 200 installations whichever comesfirst.

The 2MW of installed capacity is categorised as follows:

1MW: Residential customers

1MW: Other customer categories

The Grid Code caters for the production of electricity from the following renewable technologies:

1. Solar Photovoltaic

2. Wind Turbine

3. Hydro

Chapter 1 - Purpose of Grid Code

1


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1. Contact SSDG Unit at CEB Head Office for a copy of the Grid Code for Small Scale DistributedGenerators(SSDG) and prescribed Application Form . Alternatively, this can be found on the CEB Websitehttp://ceb.intnet.mu . This document contains all the information required for the interconnection with the CEB‟s low

voltage network.

2. Duly filled SSDG Application Form, requested technical specifications and processing fee (see chapter 4) to bedeposited at SSDG Unit, CEB Head Office, Curepipe.

3. CEB checks and analyses the Application Form.

4. CEB informs applicant to publish notice in Government Gazette and in at least two newspapers .

5. Applicant publishes notice. Any person wishing to object to the application published shall send a written andreasoned objection to the CEB with a copy thereof to the applicant within 14 days of the date of the publication.

6. CEB considers the objection.If there is no objection to the application or if there is an objection and it is rejected,the CEB shall initiate the procedures with the President‟s office for the granting of a permit. If the applicationsatisfies all conditions as set down by Law, the permit will be granted.

7. The applicant shall be given a non-transferrable permit as per the terms and conditions that will be laid down in aConnection Agreement to be signed by the CEB and the a pplicant after successful testing of the latter‟sinstallation.

8. Following the grant of the permit, the applicant pays the connection fee (Annex 3) and shall complete theinstallation within a period of twelve months from the date the permit was granted; otherwise the permit shalllapse.

9. Upon completion of installation, applicant/Installer shall submit a duly signed certificate of installation as per Annex5 to the CEB.

10.CEB shall inspect and test the installation for compliance with the Grid Code requirements and standards.CEB willthen issue a certificate of commissioning to the Applicant.

11. Applicant signs a Connection Agreement.

12.CEB/Applicant shall then cause a proclamation to be published in the Government Gazette and two newspapersinforming the public of the start of operation of the SSDG.

13.SSDG in operation.

Chapter 2 - Connecting Small Scale Distributed Generators(SSDG) to theGrid

http://ceb.intnet.mu/http://ceb.intnet.mu/http://ceb.intnet.mu/


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1.0 Design parameters

The SSDG will be connected to the 400/230 V system as described in Table 1 below. TheSSDG has to be functioning and protect itself within the range of the voltages, currents andfrequencies existing in the CEB‟s grid .

Description RangeVoltage 230/400 V ± 6 %

Short circuit Characteristics (1 sec) 18 kA, (50 Hz)Nominal frequency 50 HzStatutory frequency deviation 50 Hz ±1.5 %Operating frequency range 47 Hz – 52 Hz

Table 1: Normal operating parameters of the CEB’s low voltage grid

The CEB LV grid is designed as a TT system.

2.0 Protection requirements

2.1 Avai labi l i ty of protect ion

The applicant shall ensure that all equipment are protected and that all elements of theprotection, including associated inter-tripping, are available at all times. Unavailability of the

protection will require the SSDG plant to be taken out of service.

The SSDG shall be protected against

a. Overload.b. Short circuit within the SSDG.c. Earth faults in the LV grid close vicinity of the SSDG.d. Over Current.e. Abnormal voltages(Table 2 below)f. Abnormal frequencies (Table 2 below)g. Lightning.h. Loss of mains.

2.2 DC Funct ions of pro tec t ion appara tus

All protection apparatus functions shall operate down to a level of 50% of the nominal DCsupply voltage of the DC system, or the system must be able to safely disconnect andshutdown when operation conditions are outside the nominal operating DC voltage specifiedin the DC system specifications.

Chapter 3 - Grid Code Requirements and Safety Aspects


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2.3 Protec t ion f lagging , ind ica t ion and a la rms

All protective devices supplied to satisfy the CEB‟s requirements shall be equipped withoperation indicators. Such indicators shall be sufficient to enable the determination of whichdevices caused a particular trip.

Any failure of the applicant‟s tripping supplies, protection apparatus and circuit breaker tripcoils shall be alarmed within the applicant‟s installation, and the applicant shall be responsible

for prompt action to be taken to remedy such failure.

2.4 Trip se t t ings

The trip settings must comply with the values stated inTable 2.

Parameter Symbol Trip setting ClearancetimeOver voltage ( a) U>> 230 V + 10 % 0,2 s

Over voltage U> 230 V + 6 % 1,5 sUnder voltage U< 230 V – 6 % 1,5 sOver frequency ( ) f> 50 Hz + 2 % 0,5 s

Under frequency f< 50 Hz - 6 % 0,5 s

Loss of mainsdf/dtVectorshift

2.5 Hz / s10 degrees 0,5 s

Table 2: Default interface protection settings.

NOTE: Voltage and frequency is referenced to the Supply Terminals.

(a) If the SSDG can generate higher voltage than the trip setting, the step 2 over voltage isrequired.

(b) The trip setting for over frequency is set lower than the maximum operating frequencydefined in Table 1 in order to avoid contribution of the SSDG to rising frequency.

2.5 Network is landin g The applicant shall not supply power to the CEB‟s network during any outages of the system.The SSDG may only be operated during such outages to supply the applicant‟s own load(isolated generation) with a visibly open tie to the CEB‟s network. The SSDG shall cease toenergise the CEB‟s network within 0.5 seconds of the formation of an island as shown inTable 2.

2.6 Re-connect ion

Following a protection initiated disconnection, the SSDG is to remain disconnected from the

network until the voltage and frequency at the supply terminals has remained within thenominal limits for at least 3 minutes. Automatic reconnection is only allowed whendisconnection was due to operating parameters being outside the normal operating range


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stated in Table 2, not if disconnection was caused by malfunctioning of any devices within theSSDG installation.

2.7 Synchronis ing AC genera tors

The SSDG shall provide and install automatic synchronizing. Check Synchronizing shall beprovided on all generator circuit breakers and any other circuit breakers, unless interlocked,that are capable of connecting the SSDG plant to the CEB‟s network. Check SynchronisingInterlocks shall include a feature such that circuit breaker closure via the CheckSynchronising Interlock is not possible if the permissive closing contact is closed prior to thecircuit breaker close signal being generated.

2.8 Earthing requirements

Earthing shall be according to IEC 60364-5-55.

For systems capable of operating in isolated generation protection by automaticdisconnection of supply shall not rely upon the connection to the earthed point of the public

supply system.When a SSDG is operating in parallel with the CEB‟s network, there shall be no directconnection between the cogenerator winding (or pole of the primary energy source in thecase of a PV array or Fuel Cells) and the CEB‟s earth terminal.

The winding of an a.c. generator must not be earthed. Note that a d.c. source or d.c.generator could be earthed provided the inverter separates the a.c. and d.c. sides by at leastthe equivalent of a safety isolating transformer. However, consideration would then need tobe given to the avoidance of corrosion on the d.c. side.

At the CEB‟s grid TT earthing system is normal. The neutral and earth conductors must bekept separate throughout the installation, with the final earth terminal connected to a localearth electrode.

Warning Notice that: “CONDUCTORS MAY REMAIN LIVE WHEN ISOLATOR IS OPEN”shall be conspicuously displayed at the installation.

3.0 Power quality3.1 Lim itat ion of DC inject ion

The SSDG should not inject a DC current greater than the largest value of 20 mA and 0.25 %of the rated AC output current per phase.

3.2 Lim itat ion of vol tage f l icker induced by the SSDG

The SSDG installation shall not cause abnormal flicker beyond the limits defined by the“Maximum Borderline of Irritation Curve” specified in the IEEE 519-1992.

3.3 Harmon ics

Based on IEEE 519, the total harmonic distortion (THD) voltage shall not exceed 5.0% of thefundamental on 400 V when measured at the point of common coupling (PCC).


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The total harmonic distortion will depend on the injected harmonic current and the systemimpedance seen from the PCC. However, in order to facilitate the fulfilment of therequirements by e.g. inverter manufacturers, the voltage distortion limits have been translatedinto a similar requirement on current distortion.

The SSDG system output should have low current-distortion levels to ensure that no adverse

effects are caused to other equipment connected to the utility system. The SSDG systemelectrical output at the PCC should comply with Clause 10 of IEEE Std. 519-1992 and shouldbe used to define the acceptable distortion levels for PV systems connected to a utility. Thekey requirements of this clause are summarized in the following:

a. Total harmonic current distortion (Total demand distortion, TDD) shall be less than 5%of the fundamental frequency current at rated current output.

b. Each individual harmonic shall be limited to the percentages listed in Table 3. Thelimits in Table 3 are a percentage of the fundamental frequency current at rated current

output.

c. Even harmonics in these ranges shall be


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The contribution from one installation may not cause an increase of the voltage unbalance ofmore than 1.3%.

When considering three phase units, the contribution to the voltage unbalance can bedescribed as

or

Where

S SC is the Three phase short circuit power

Ineg,seq,load is Negative sequence of component loads

U line is the line voltage

Uunbalance the voltage unbalance

If nothing else is stated the S sc shall be 2.5 MVA. The demand on voltage unbalance on athree phase load can be translated into a demand on the maximum negative sequence

current.

3.6 Voltag e step chan ge

The process of starting an SSDG can sometimes cause step changes in voltage levels in thedistribution network. These step changes are caused by inrush currents, which may occurwhen transformers or induction generators are energised from the network. Synchronousgenerators do not give rise to inrush currents themselves, but their generator transformers

may do so if they are energised from the network. Step voltage changes will also occurwhenever a loaded generator is suddenly disconnected from the network due to faults orother occurrences.

Step voltage changes caused by the connection and disconnection of generating plants at thedistribution level, should not exceed ±3% for infrequent planned switching events or outagesand ±6% for unplanned outages such as faults.

If the connection of the SSDG to the grid does not exceed the following values in Table 4 it is

expected to stay within the above mentioned voltage levels.

%100),,(

),,(),,(

cbaU

cbaU U U U MaxU

avg

avg cbaunbalance

A I load seqneg 6.35.2400%3.13

,,max,

sc

lineload seqneg S

U I

][U3 %inunbalance,,

sc

lineload seqneg unbalance S

U I U ,,

3


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Connection Inrush currentSingle phase 19 AThree phase 30 A

Table 4: Maximum inrush current

Where induction generators are used, as in fixed speed wind turbines, they shall be fitted with„soft starters‟ These devices limit inrush currents to roughly the same level as the normalrated current. This reduces the magnitude of the step voltage changes which occur onstarting.

4.0 Power factor

The power factor of the SSDG at normal operating conditions across the statutory range ofnominal voltage shall be between 0.95 leading and 0.95 lagging.

5.0 Safety, isolation and switching5.1 Rules for working on low voltage (LV) grid

According to the CEB safety rules based on Occupational Safety and Health Act 2005, thefollowing rules must be respected before working on a LV grid:

a. The system must be isolated from all possible sources of supply, all switches must belocked in visibly open positions, the system must be tested on the site of work, and thesystem must be short-circuited.

b. The SSDG shall have a local means of isolation that disconnects all live conductorsincluding the neutral. The producer shall not energize a de-energized CEB ‟s Powercircuit.

c. A switch shall be installed to disable the automatic or manual closing of theinterconnecting switch or breaker. This switch shall be accessible to the CEB ‟s personnelto obtain the necessary safety requirements when the CEB ‟s personnel is working onassociated equipment or lines. While the CEB ‟s personnel is working on the grid theoperation of switches shall not be possible for others than the CEB, which can beassured by keeping the keys to lockable switches. Alternatively the CEB ‟s personnel willremove and keep fuses while working on lines.

d. In all instances the switch, which must be manual, must be capable of being secured inthe „off‟ isolating position. The switch must be located in an accessible position in theproducer‟s installation.

e. Isolation for an SSDG shall be as per Figure 1 below


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Figure 1: Example on means of isolation for an SSDG

f. The visible switch shall be visibly marked. Also all transformers that carry SSDG installations onthe LV side shall be visibly marked. Additionally the CEBwill maintain an updated register of all

SSDGs with precise addresses, connecting points and relevant transformers.

5.2 Safety con cerns

The applicant shall observe the following safety concerns which include

(a) Persons must be warned that the installation includes a SSDG so that precautions canbe taken to avoid the risk of electric shock. Both the mains supply and themicrogenerator must be securely isolated before electrical work is performed on any partof the installation. Adequate labelling must be available to warn that the installationincludes another source of energy.

(b) Photovoltaic (PV) cells will produce an output whenever they are exposed to light, andwind turbines are likely to produce an output whenever they are turning. Additional

precautions such as covering the PV cells or restraining the turbine from turning will benecessary when working on those parts of the circuit close to the source of energy andupstream of the means of isolation.

(c) The manufacturer or supplier of the SSDG is required to certify compliance with theElectrical Equipment Safety Regulations and the Electromagnetic CompatibilityRegulations. The SSDG will be CE marked or tested by equivalent accredited testingagencies to confirm this. This should ensure that the SSDG is satisfactory in a domesticinstallation in terms of the power factor, generation of harmonics and voltagedisturbances arising from starting current and synchronisation.

5.3 Electromagnet ic emission / Immu nity

The SSDG shall comply with the requirements of the EMC Directive and in particular theproduct family emission standards.

5.4 Labels

To indicate the presence of the SSDG within the premises, a label as per Figure 2 will befixed by the CEB at:

(a) the supply terminals (fused cut-out)

(b) the meter position

(c) the consumer unit, and

(d) all the points of isolation

`

G

Fusiblecut-out

Import/ExportMeter

Visibleswitch

Main switch andDistribution board Local

isolatorGenerator

L

N

ProductionMeter


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Figure 2: SSDG label

The installation operating instructions must contain the manufacturer‟s contact details e.g.name, telephone number and web address.

5.5 Documentat ion

Up-to-date information must be displayed at the SSDG as follows:

(a) A circuit diagram showing the relationship between the SSDG and the CEB‟s fused cut -out. This diagram is also required to show by whom the generator is owned andmaintained.

(b) A summary of the protection‟s separate settings incorporated within the equipment. Thefigure 3 below is an example of the type of circuit diagram that needs to be displayed.

This diagram is for illustrative purposes and not intended to be fully descriptive.

Figure 3: Example of circuit diagram for a SSDG installation

(c) In addition the maintenance requirements and maintenance services available shall bedocumented.

(d) The applicant shall keep a certificate signed by the maintenance contractor containing atleast the following:

A statement confirming that the solar PV system/wind turbine/hydro meets therequirements of this standard.

Client‟s name and address.

Site address (if different). Contractors name, address etc.

List of key components installed.

CEB REGISTERED


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Estimation of system performance

5.6 Info rm ation plate

The following information shall appear on the information plate:

(a) manufacturer‟s name or trade mark; (b) type designation or identification number, or any other means of identification making it

possible to obtain relevant information from the manufacturer;

(c) rated power;

(d) nominal voltage;

(e) nominal frequency,

(f) phases;

(g) power factor.

5.7 Electric al con tracto r / Installer

The SSDG shall be installed in accordance with the instructions issued by the manufacturer.

In designing a connection for an SSDG, the electrical contractor /installer must consider allthe issues that would need to be covered for a conventional final circuit, including:

the maximum demand (and the generator output); the type of earthing arrangement; the nature of the supply; external influences; compatibility, maintainability and accessibility; protection against electric shock; protection against thermal effects; protection against overcurrent; isolation and switching; selection and installation issues.

The installer must affix a label clearly indicating the next scheduled maintenance of theinstallations and inform the CEB, who will add the information to the SSDG-register.

The installer must be skilled in the field of SSDG installations and possess an approvedcertificate.

6.0 Metering

In order to enable correct billing of the applicant, a bidirectional meter measuring both theimport and export energy shall be in place. Billing will not be based on the gross productionof the SSDG, but on the imported and exported energy separately. For information and datapurposes, a second meter measuring the gross production of the SSDG shall be installed asshown in Figure 1 above.

Note:Green field installations shall not be entertained in this project.


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7.0 Testing, commissioning and maintenance

Testing of SSDGs will be done in the presence of the CEB. The applicant shall notify the CEBin advance with a testing and commissioning plan. The applicant shall keep written records oftest results and protection settings. The applicant shall regularly maintain their protectionsystems in accordance with good electrical industry practice .

8.0 Standards and regulations

All electrical apparatus, materials and wiring supplied shall comply with the Electricity Act, theCentral Electricity Board Act, Electricity Regulations, this code and the following standards:

EN 50438Requirements for the connection ofmicro-generators in parallel with publiclow-voltage distribution networks

IEC 60364-5-55 Electrical installations of buildings

IEC 60664-1Insulation coordination for equipmentwithin low-voltage systems – Part 1: Principles, requirements and tests

IEC 60909-1Short circuit calculation in three-phase acsystems.

IEC 61000-3-2Limits - Limits for harmonic currentemissions (equipment input current up toand including 16 A per phase)

IEC 61000-3-3

Limits – Limitation of voltage changes,voltage fluctuations and flicker in publiclow-voltage supply systems, forequipment with rated current ≤ 16 A perphase and not subject to conditionalconnection

IEC 61000-6-1Generic standard -EMC - Susceptibility -Residential, Commercial and Lightindustry

IEC 61000-6-3Generic standard - EMC - Emissions -Residential, Commercial and Light

industry

IEC 62305-3Protection against lightning, part 3physical damage and life hazards instructures

IEC 60364-1Electrical installations of buildings - Part1: Scope, object and fundamentalprinciples

IEC 60364-5-54

Electrical installations of buildings. Part 5:Selection and erection of electricalequipment. Chapter 54: Earthing

arrangements and protective conductors


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IEEE P1547Series of Standards for Interconnection,May, 2003, NREL/CP-560-34003

IEEE519-1992

IEEE Recommended practice andrequirements for harmonic control ofelectric power systems, Institute ofElectrical and Electronic Engineers,

Piscataway, NJ. April 1992

IEEE C37.90IEEE Standard for Relays and RelaySystems Associated with Electric Power

Apparatus

9.0 Conditions on network for review of application

The total capacity of installed distributed generators (SSDG) on the relevant 22kV/0.4 kV

or 6.6kV/0.4kV transformer exceeds 25 % of the LV transformer fuse capacity. The total capacity of installed distributed generators (SSDG) on the relevant low voltage

feeder exceeds 90 % of the feeder fuse capacity.

The capacity of SSDG at one consumer terminal exceeds the capacity of the fuse at theexisting consumer terminal.

The capacity of SSDG at one installation exceeds 25 kW in certain areas.


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“AC” means Alternating Current;

“Applicant” means a producer of electricity through a SSDG installation;

“CEB ” means the Central Electricity CEB;

“ Circuit breaker ” means a switching device capable of making, carrying, and breakingcurrents under normal circuit conditions and also making, carrying for a specified time, andbreaking currents under specified abnormal conditions such as those of short circuit;

“DC” means Direct Current;

“Dedicated transformer” means a transformer installed between the CEB ‟s network andSSDG network that serves only the SSDG and attached loads, if any ;

“DG” means Distributed Generation;

“Distributed generation” means electric generation facilities connected to the Utility network atthe PCC;

“Directional -power relay” means a relay that operates on a predetermined value of power flowin a given direction, or upon reverse power so that, when used with SSDG in a non-exportconfiguration, it will prevent power flow into the CEB´s Network;

“Flicker” means a variation of input voltage sufficient in duration to allow visual observation ofa change in electric light source intensity;

“Fault” means a physical condition that c auses a device, a component, or an element to fail toperform in a required manner,

for example a short-circuit, a broken wire, an intermittent connection;

“Frequency” means the number of complete cycles of sinusoidal variations per unit time;

“Greenfield” means an installation of SSDG at a location without existing connection point;

“Grid” means CEB‟s network that brings electricity from power stations to consumers ”

“THD” means Total Harmonic Distortion

“Harmonic distortion” means continuous distortion of the normal sine wave; typically causedby nonlinear loads or by inverters, measured in Total Harmonic Distortion (THD);

“IGBT” means Insulated -gate bipolar transistor;

“Installer” means a person who has followed a course on Certified SSDG i nstallation andbeen awarded a certificate from MITD;

“IPP” means an Independent Power Producer;

Annex 1: Abbreviations and definitions


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“Islanding” means a condition in which a portion of the CEB ‟s network is energised by one ormore SSDGs through their PCC(s) while electrically separated from the rest of the system;

“Isolated Generation” means a condition where the electrical path at the PCC is open and theSSDG continues to energise local loads;

“kV” means kilovolt;

“kVA” means Kilovolt Ampere

“kW” means Kilo Watt (1,000 W = 1,000 J/s);

“kWh” means Kilowatt hour (1,000 watt hours);

“LV” means Low Voltage (Voltage below 1,000 V);

„MITD‟ means Mauritius Institute of Training and Development

“MW” means m egawatt (1,000,000 W = 1,000,000 J/s);

“Parallel operation” means a condition where the SSDG is operating while connected toCEB ‟s network;

“PCC” means point of common coupling;

“Point of Common Coupling (PCC)” means the point at which a SSDG is connected to the

CEB ‟s network;

“Power factor Ratio” means ratio of real to total apparent power (kW/kVA) expressed as adecimal or percentage;

“Producer” means a producer of electricity through a SSDG installation or the owner thereof;

“PV” means photovoltaic;

“PWM” means Pulse width modulation;

“RE” means renewable energy;

“SSDG” means Small Scale Distributed Generation up to 50 kW as categorised in Schedule 2

“SWC” means Surge Withstand Capability, the immunity of this equipment to fast andrepetitive electrical transients;

“TT system” means in a TT earthing sy stem, the protective earth connection of the consumeris provided by a local connection to earth;

“ Voltage-restrained overcurrent relay” means a protective relay in which the pickup andover-current tripping times are affected by the voltage.


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Table A

Feed-in tariff for 15years.

WindRs/kWh

HydroRs/kWh

PVRs/kWh

Micro (up to 2.5 kW) 20 15 25

Mini(2.5 + - 10 kW) 15 15 20

Small(10 + - 50 kW) 10 10 15

Table B

Greenfield tariff for15 years.

WindRs/kWh

HydroRs/kWh

PVRs/kWh

Micro (up to 2.5 kW) 17 12.75 21.25

Mini(2.5 + - 10 kW) 12.75 12.75 17

Small(10 + - 50 kW) 8.50 8.50 12.75

(a) After 15 years the feed in tariff will be the marginal electricity production cost of the CEB.

(b) The above Tariffs are applicable for up to a total of 200 installations or 2MW whichevercomes first.

(c) If the annual production/consumption (from production) ratio is greater than 3 , thetariff for the following year shall be in accordance with table B

Annex 2: Feed In Tariff (FIT)


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Fees for processing application and connection

Processing of Application……… .………………...…..Rs 375

Connection for Single phase …………………………Rs 750

Co nnection Three phase ……………….………...…..Rs 1500

Engineering Review / Distribution study

Preparation of estimate for network modification

Domestic………………..Rs 1500

Others ………………… ..Rs 8500

Revision of estimate ……Rs 1500

Network construction / modification

The costs for network construction or modification will be determined after carrying out the

engineering review.

Annex 3: CEB fees


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Serial No….…………

(For office use only)

SSDG Application Form

Applicant Information For officeuse only

Name

Postal addressContact telephone numberFax numberTax Account Number

VAT Registration Number (if applicable)Business Registration Number (if applicable) Email address

Installer details *1

InstallerAccreditation/qualificationPostal addressContact personTelephone numberFax number

Email Address

Project details For officeuse only

Site/project addressTelephone number (project site)Business Partner Number(please refer to your electricity bill or alternativelyattach a recent electricity bill)

Contract Account Number(please refer to your electricity bill or alternativelyattach a recent electricity bill) Expected installation commencement dateExpected commissioning dateSSDG details SSDG location within the installation

Total number of SSDG units to be installedunder this project, to include SSDG unitlocation and capacity in KW & kVA

No. of Units: ……… ..of………k W eachTotal KW : …………… Total KVA: ……………...

Any other known SSDG on installation siteType of RE technology

(photovoltaic/ hydro/ windExpected annual generation (kWh)

Annex 4: SSDG Application Form


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Declaration – to be completed by applicantComments (use separate sheet if necessary)I declare that this installation has beendesigned to comply with the requirements ofthe Grid code for SSDG.

Name :Signature & Date :

Other information to be enclosed For office useonly

SSDG type verification test certificate, to includethe following information:

Yes/Noif submitted

Type of SSDG (RE technology)

Manufacturer and model type Country of origin SSDG rating (A), power factor and frequency Single or multi phase Maximum peak short circuit current (A) Standard of compliance **2 Contact details – telephone number, web addressetc

Copy of system circuit diagram (single linediagram) within the installation including theproposed grid connection and the associatedmetering points/ supply pointsEarthing arrangementsSite layout plan showing location of SSDGs andother major electrical equipment installed – ifapplicable

CEB comments – to be completed by CEB representative following application As a representative of the CEB, I give, inprinciple, permission for the connection ofthese SSDG units. If „no‟ see commentsbelow

YesNo

Comments

Name, date and signature

* 1 At the start of this project until further notice, the CEB shall accept a „ Certificate ‟ from the supplier of theequipment certifying that the installer is well-versed with the installation of the equipment.Furthermore, the topics covered and the duration of the training shall be mentioned on the„Certificate’ .

**2

All SSDGs to submit certificate of compliance with the Electrical Equipment Safety Regulations and theElectromagnetic Compatibility Regulations (CE Marked). PV installations to submit certificates that thepanels are to IEC 61215 for crystalline silicon and IEC 61646 for thin film silicon. Wind installations tosubmit certificates that the wind turbine is as per IEC 61400-2.


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SSDG Guaranteed Particulars

(All information given hereunder should be substantiated by documents from the Manufacturer)S.

No.Parameters Requirements Proposed

1 Inverter Type

Central Inverter OR

Micro inverter

2 Capacity of Inverter To specify

3Protection Parameters

SettingsTrip

Setting Clearance

TimeTrip

Setting Clearance

Time

TripIndicationProvided

4 Over Voltage (a )

(230 V + 10 %)253 V 0,2 s

5 Over Voltage(230 V + 6 %)

243.8 V 1,5 s

6 Under Voltage(230 V – 6 %)

216.2 V 1,5 s

7 Over Frequency (b

)(50 Hz + 2 %)

51 Hz 0,5 s

8 Under Frequency(50 Hz - 6 %)

47 Hz 0,5 s

9 Loss of Mains(df/dt - Vector shift)

2.5 Hz / s10 degrees

0,5 s

10 Islanding Detection Yes

11 Isolated Generationpossible

Yes / No

12 Reconnection Time 3 mins.

13Max. DC Currentinjection to grid To specify

14 Rated AC output Currentper phase

To specify

15 Total HarmonicsDistortion ( Voltage )

To specify

16 Total HarmonicsDistortion ( Current )

To specify

17 Surge WithstandCapability

To specify

18 Power Factor(leading & lagging)

0.95

19Will first Switch aftermeter have visiblecontacts ?

Yes

20Will first Switch aftermeter have lock facilitiesin open position ?

Yes

21 Will Production Meter beinstalled ?

Yes / No

22 Will Earthing System beTT ?

Yes

23 Will Batteries beInstalled ?

Yes / No

Note: For No.4 and No.7 see clause 2.4 of Grid Code

Signature of applicant: ………………………………


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Applicant/installer to submit duly signed certificate (as shown below) to the CEB.

CERTIFIC TE OF INST LL TION

I hereby certify that the installation of the SSDG, situated at address [ ] for [name of Applicant]has been done as per the requirements of the Grid Code and as per attached detailedschematic diagram.

Name of Certified Installer: ……………..………………………………….….

Signature of Installer:………………….. Date:…………….

Name of Applicant:………………………

Signature of Applicant:…………………. Date:…………….

Annex 5: Certificate of Installation


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After commissioning of SSDG, CEB will issue commissioning certificate to applicant.

CERTIFIC TE OF COMMISSIONING

This is to certify that the SSDG installation, situated at [address] in the name of Applicant[name] complies with the requirements of the Grid Code and it has been commissionedon………………… by the Central Electricity Board‟s SSDG Commissioning Team.

District SectionName: ……………………………….. Signature: …………………………….

SSDG UnitName: ……………………………….. Signature: …………………………….

Meter Lab sectionName: ……………………………….. Signature: …………………………….

Health and Safety OfficerName: ……………………………….. Signature: …………………………….

Annex 6: Certificate of Commissioning


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This Connection Agreement is made (date and place):

_____________________.

BETWEEN

________________________, (the CEB)

AND

____________________________, (the “customer”)

(Each a “Party” and collectively the “Parties”)

1. WHEREAS The CEB is the owner of the distribution system.

2. And WHEREAS the Customer owns or operates a small scale distributed generationfacility (the "Facility").

3. And WHEREAS the Customer has connected or wishes to connect its facility to CEB´sdistribution system and CEB has connected or has agreed to connect the facility to thedistribution system.

4. And WHEREAS the CEB has previously reviewed and accepted the Customer'sapplication to connect and related materials that were submitted to the CEB in accordancewith the process set out in the Grid Code (the "Code") (altogether, the "Application")

5. And WHEREAS in accordance with the Electricity Act and the Grid Code, the CEB hasagreed to offer, and the Customer has agreed to accept, distribution service in relation tothe Facility.

NOW THEREFORE in consideration of the foregoing, and of the mutual covenants,agreements, terms and conditions herein contained, the Parties, intending to be legallybound, hereby agree as follows:

Annex 7: Connection Agreement


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1. Definitions

1.1 Words and phrases contained in this Agreement (whether capitalized or not) that are notdefined in this Agreement have the meanings given to them in the Electricity Act, theCentral Electricity Board Act with subsequent amendments, the Utility Regulatory

Authority Act and The Interpretation and General Clauses Act or the Code.

2. Type of Facility

2.1 The Facility has a name-plate rated capacity below 50 kW and applies as a Small ScaleDistributed Generator.

3. Incorporation of code and Application of Conditions of Service and Other Contracts

3.1 The Code is hereby incorporated in its entirety by reference into, and forms part of, this Agreement. Unless the context otherwise requires, all references to “this Agreement”include a reference to the Code.

3.2 The CEB hereby agrees to be bound by and at all times to comply with the Code, and theCustomer acknowledges and agrees that the CEB is bound at all times to comply with theCode in addition to complying with the provisions of this Agreement.

3.3 In addition to this Agreement, the relationship between the CEB and the Customer will begoverned by the CEB‟s Conditions of Service that are in effect at the relevant time. In the

event of a conflict or an inconsistency between a provision of this Agreement and aprovision of the CEB‟s Conditions of Service, the provision of this Agreement shallgovern.

4. Facility Standards

4.1 The Customer shall ensure that the Facility:

(a) meets all applicable requirements of the Electricity Act; and

(b) is installed, constructed, operated and maintained in accordance with this Agreement, theCEB‟s offer to connect, and meets the technical and operating requirements describedand approved in the application form.

5 Charges, Settlement and Billing

5.1 The selling price (feed-in tariff) for export of electricity from the facility to the grid isdescribed below.


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Tariffs for electricity production

The SSDG is a

………………… Micro (up to 2.5 kW)

………………… Mini (2.5 + to 10 kW)

………………… Small (10 + to 50 kW)

………………… Wind

………………… PV

………………… Hydro

installation.

The selling price for the electricity production is set out below, and is fixed for a period ofexactly XX years; with the commencement date for this XX year period being the date thisagreement comes into effect.

For facilities exporting the net electricity production of the consumer installation to the grid,

the selling price is fixed to xx MUR/kWh.

5.2 If the annual production/consumption (from production) ratio is greater than 3, the tariff forthe following year shall be in accordance with Table B in Annex 2. An addendum to thisagreement shall be signed by both parties.

5.3 An export bill with a detachable SSDG Invoice detailing the amount of energy exported tothe grid will be given to the SSDG owner. SSDG owner has to sign on the Invoice andforward it back to the SSDG Unit at the CEB Head Office at Curepipe.

5.4 Upon receipt of the signed SSDG Invoice,a cheque will be issued and posted to theSSDG owner.

5.5 In case the import bill(s) is not settled after notification by CEB, the service line to thecustomer will be disconnected from the grid.

6. Representations and Warranties

6.1 The Customer represents and warrants to the CEB as follows, and acknowledges that theCEB is relying on the following representations and warranties without independent

inquiry in entering into this Agreement:(a) the Facility is fully and accurately described in the Application;


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(b) all information in the Application is true and correct;

(c) the Facility is in compliance with all applicable technical requirements and laws;

(d) the Customer has been given warranty information and operation manuals for the Facility;

(e) the Customer has been adequately instructed in the operation and maintenance of theFacility and the Customer has developed and implemented an operation and

maintenance plan based on those instructions;

(f) the Customer has all necessary power, authority and capacity to enter into this Agreement and to perform its obligations under this Agreement;

(g) this Agreement constitutes a legal and binding obligation on the Customer, enforceableagainst the Customer in accordance with its terms;

(h) the Customer holds all permits, licences and other authorizations that may be necessaryto enable it to own and operate the Facility; and

(i) any individual signing this Agreement on behalf of the Customer has been duly authorizedby the Customer to sign this Agreement and has the full power and authority to bind theCustomer.

6.2 The CEB represents and warrants to the Customer as follows, and acknowledges that theCustomer is relying on the following representations and warranties without independentinquiry in entering into this Agreement:

(a) the CEB is duly incorporated under the laws of Mauritius;

(b) the CEB has all necessary power, authority and capacity to enter into this Agreementand to perform its obligations under this Agreement;

(c) this Agreement constitutes a legal and binding obligation on the CEB, enforceableagainst the CEB in accordance with its terms; and

(d) any individual signing this Agreement on behalf of the CEB has been duly authorized bythe CEB to sign this Agreement and has the full power and authority to bind the CEB.

7. Connection Disconnect Device

7.1 The Customer shall furnish and install a connection disconnect switch for the Facility thatopens, with a visual break, all ungrounded poles of the connection circuit. Theconnection disconnect switch shall be rated for the voltage and fault currentrequirements of the Facility, and shall meet all applicable standards. The switchenclosure, if applicable, shall be properly grounded. The connection disconnect switchshall be accessible at all times, located for ease of access to the CEB‟s personnel, andshall be capable of being locked in the open position. The Customer shall follow theCEB‟s procedures for switching, clearance, tagging, and locking.

8. Modifications to the Facility


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8.1 The Customer shall not modify (increase capacity) its connection assets or the Facilityexcept in accordance with this section. Where the modification will not increase themaximum electrical output of the Facility, the Customer shall give the CEB no less than15 working days notice prior to the date on which the modification will be made. Wherethe modification will increase the maximum electrical output of the Facility, the Customershall submit a new application for connection to the CEB. The CEB shall process thatapplication for connection in accordance with the Code. The Customer shall notcommence such modification until that process has been completed.

9. Indemnity

9.1 The customer shall indemnify the CEB for damages claimed by third parties where thecause of the loss due to acts and or omission of the customer.

10. Liability and Force Majeure

10.1 A Party shall have a duty to mitigate any losses relating to any claim for indemnificationfrom the other Party that may be made in relation to that other Party. Nothing in this

section shall require the mitigating Party to mitigate or alleviate the effects of any strike,lockout, restrictive work practice or other labour dispute.

10.2 A Party shall give prompt notice to the other Party of any claim with respect to whichindemnification is being or may be sought under this Agreement.

10.3 CEB shall not be liable to any damage caused during cyclonic/surge/lightning or otheradverse conditions beyond its control which may prevail during the installation andoperation of the SSDG.

11. Access to Facility11.1 Each Party shall ensure that its facilities are secured at all times.

11.2 The Customer shall permit and, if the land on which the Facility is located is not ownedby Customer, cause such landowner to permit, the CEB's employees and agents toenter the property on which the Facility is located at any reasonable time. Such accessshall be provided for the purposes of inspecting and/or testing the Facility as and whenpermitted by this Agreement, the Grid Code or the CEB‟s Conditions of Service or asrequired to ensure the continued safe and satisfactory operation of the Facility, toensure the accuracy of the CEB's meters, to establish work protection, or to perform

work.

11.3 Any inspecting and/or testing referred to in section 11.2 shall not relieve the Customerfrom its obligation to operate and maintain the Facility and any related equipmentowned by the Customer in a safe and satisfactory operating condition and inaccordance with this Agreement.

12. Disconnection of Facility to Permit Maintenance and Repairs

12.1 The CEB will provide the Customer with reasonable notice of any planned equipmentoutages in the CEB‟s distribution system which will impact the Facility or its connection.

12.2 The CEB will make reasonable efforts to ensure that the outages referred to in section12.1 will be of minimal duration and cause minimal inconvenience to the Customer.


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12.3 In connection with any planned equipment outage, either Party may disconnect orisolate, or require the disconnection or isolation of, its Facility or system (as applicable)from the other Party‟s Facility or system (as applicable) so that the employees,contractors or agents of the Party may construct, maintain, repair, replace, remove,investigate or inspect its own Facility or system (as applicable) in accordance with theterms of this Agreement and good utility practice.

12.4 Where practical, the Customer shall notify the CEB prior to temporarily isolating ordisconnecting the Facility from the CEB‟s distribution system.

13. Dispute Resolution

13.1 Any dispute between the Customer and the CEB arising under or in relation to this Agreement shall be referred to arbitration.

13.2 `The Parties shall comply with the procedure set out in the Code de procedure civile forthe purposes of the Arbitration, provided that nothing shall prevent a Party from seekingurgent or interlocutory relief from a court in relation to any dispute arising under or inrelation to this Agreement.

13.3 ̀This clause shall survive the termination of the present agreement howsoever caused.

14. Amendments

14.1 The Parties may by mutual agreement amend this Agreement to reflect changes thatmay from time to time be made to the Code during the term of this Agreement.

14.2 Any amendment to this Agreement shall be made in writing and duly executed by bothParties.

15. Term of Agreement and Termination

15.1 This Agreement shall become effective upon execution by the Parties, and shallcontinue in effect until terminated in accordance with section 15.2 or 15.3.

15.2 The Customer may, if it is not then in default under this Agreement, terminate this Agreement at any time by giving the CEB thirty days prior written notice setting out the

termination date.15.3 The CEB may terminate this Agreement upon any material breach of this Agreement by

the Customer (a "Default"), if the Customer fails to remedy the Default within theapplicable cure period referred to in section 15.4 after receipt of written notice of theDefault from the CEB.

15.4 The Customer shall cure a Default within a reasonable cure period and no longer thansixty working days.

15.5 Termination of this Agreement for any reason shall not affect:


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the liabilities of either Party that were incurred or arose under this Agreement prior tothe time of termination; or

that expressly apply in relation to disconnection of the Customer‟s facilities followingtermination of this Agreement.

15.6 Subject to clause 13 above, termination of this Agreement for any reason shall be

without prejudice to the right of the terminating Party to pursue all legal and equitableremedies that may be available to it, including injunctive relief.

15.7 The rights and remedies set out in this Agreement are not intended to be exclusive butrather are cumulative and are in addition to any other right or remedy otherwiseavailable to a Party at law or in equity.

15.8 Sections 15.5 to 15.7 shall survive termination of this Agreement.

16. Governing Law

16.1 This Agreement shall be governed by the laws of the Republic of Mauritius

17. Entire Agreement

17.1 Except as expressly provided herein, this Agreement constitutes the entire agreementbetween the Parties with respect to the subject-matter hereof and supersedes all priororal or written representations and agreements of any kind whatsoever with respect tothe subject-matter hereof.

IN WITNESS WHEREOF, the Parties hereto, intending to be legally bound, have caused this Agreement to be executed by their duly authorized representatives.

__________________________________

Customer Tax Account Number

__________________________________ __________________

Customer Signature and Date

_________________________________

Name (Print)

_________________________________Title

__________________________________ _____________________

CEB Signature and Date

_________________________________

Name (Print)

_________________________________

Title

pams grid code

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