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NEDO-MEA Meeting

11 December 2012

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MEA Background

Bangkok, Nonthaburi and Samutprakan

Service area : 3,192 km2

Maximum Demand: 8,383 MW

Substation no.: 149

Number of customer : 3,115,695

April , 2012Load

Time

2

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Distribution facilities

Transformers Terminal station 230/69-115 kV ( 17 stations) 18,205.88 MVA

Substation 69-115/12-24 kV ( 149 stations ) 18,405.00 MVA

Distribution 12-24 kV/230-380 V 14,148.68 MVA

TRANSMISSION LINES 230 kV ( 6 LINES ) 49.54 cct-km

115 kV ( 38 LINES ) 722.75 cct-km

69 kV ( 77 LINES ) 897.88 cct-km

DISTRIBUTION LINES

24 kV ( 1,156 LINES ) 12,829.52 cct-km

12 kV ( 464 LINES ) 4,279.18 cct-km

Low voltage 27,211.83 cct-km

OPTICAL FIBER

ADSS Structure Cable 10,000.00 cct-km

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Operation and maintenance

No subsidiary company

24 kV line maintenance by district office

69 and 115 kV maintenance by Maintenancedepartment

Substation equipment maintenance by

Maintenance department

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MEA Quality of Electricity Supply for 69, 115

and 230 kV System

Frequency 50 0.5 Hz (normal operation) Data from EGAT

Voltage supply 230 kV

115 kV

69 kV

218.0 - 237.0 kV (normal)

218.0 - 242.0 kV (emergency)

106.4 - 117.6 kV (normal)

96.0 - 123.0 kV (emergency)63.6 - 70.4 kV (normal)

57.3 - 72.5 kV (emergency)

Harmonic voltage THDv less than 3.0 % Refer to planning level in

Engineering

Recommendation G5/4

table 4 and 5 which also

include individual

harmonic

Voltage flicker Pst less than 0.8

Plt less than 0.6

Refer to planning level in

IEC 61000-3-7

Voltage unbalance Less than 1.4 % Refer to planning level in

IEC 61000-3-13

Temp. power frequency

overvoltage

Less than 173.2 % of nominal voltage Refer to EN 50160

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MEA Connection Regulation for 69, 115 and

230 kV System

Load size 230 kV not available

115 kV larger than 15 MVA

69 kV larger than 15 MVA

Depend on specific area

Maximum step voltage

change

Max. step voltage change at PCC due to

customer load variation must less than 3.0

% of nominal voltage

Power factor Between 0.9 - 1.0 lagging

Harmonic current Limit individual harmonic current up to order

50th. The limits depend on load size, system

capacity and fault level at PCC.

Refer to planning level

from Engineering

Recommendation G5/4

and assessment method

from IEC 61000-3-6

Voltage

Flicker

Limit Pst and Plt created by customer at

PCC. The limits depend on load size and

system capacity

Refer to assessment

method from IEC 61000-

3-7

Unbalanced current Limit negative sequence current. The limit

depends on load size, system capacity and

fault level at PCC.

Refer to assessment

method from IEC 61000-

3-13

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MEA Quality of Electricity Supply for 12 and 24

kV System

Frequency 50 0.5 Hz (normal operation) Data from EGAT

Voltage supply 12 kV

24 kV

10.9 - 11.8 kV (normal)

10.8 - 12.0 kV (emergency) 21.8 -

23.6 kV (normal)

21.6 - 24.0 kV (emergency)

Harmonic voltage THDv less than 4.0 % Refer to planning level in

Engineering

Recommendation G5/4

table 3 which also include

individual harmonic

Voltage flicker Pst less than 0.9Plt less than 0.7

Refer to planning level inIEC 61000-3-7

Voltage unbalance Less than 1.8 % Refer to planning level in

IEC 61000-3-13

Temp. power frequency

overvoltage

Less than 173.2 % of nominal voltage Refer to EN 50160

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MEA Connection Regulation for 12 and 24

kV System

Load size larger than 300 kVA but less than 15 MVA Depend on specific area

Maximum step voltage

change

Max. step voltage change at PCC due to

customer load variation must less than 3.0

% of nominal voltage

Power factor Between 0.9 - 1.0 lagging

Harmonic current Limit individual harmonic current up to order

50th. The limits depend on load size, system

capacity and fault level at PCC.

Refer to planning level

from Engineering

Recommendation G5/4

and assessment method

from IEC 61000-3-6

VoltageFlicker

Limit Pst and Plt created by customer atPCC. The limits depend on load size and

system capacity

Refer to assessmentmethod from IEC 61000-

3-7

Unbalanced current Limit negative sequence current. The limit

depends on load size, system capacity and

fault level at PCC.

Refer to assessment

method from IEC 61000-

3-13

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Adder

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Energy Regulatory Commission

policy framework as to ensure the equality andfairness nested between consumers, producers,and other relevant interest groups.

The primary functions and duties to oversee the regulations that deal with electricity

systems of generation, transmission, distribution, andtheir system operator.

monitoring energy market conditions by tariff review,

licensing, approval of power purchase, disputesettlement and fulfilling its mandate, in order tocounterbalance each other, to ensure maximuminterests of the people and the country

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Tariff

http://localhost/var/www/apps/conversion/tmp/scratch_4/tariff.docxhttp://localhost/var/www/apps/conversion/tmp/scratch_4/tariff.docx

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Challenge1. Power System

Power Quality, Reliability, Security

Loss Reduction, Economic

2. Service

Energy usage efficiency New Service

3. Renewable Energy

Manage and Support

New Technology (EV, Energy Storage)

4. IT Interoperability and Standard

12

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13

Smart Grid Roadmap

Stage 12012 2016

Laying the Foundations

Stage 22017 2021

Large Scale Implementation

Power system

40 automation substations Automation substation in all service area(170 stations)

Manage and Control LBS in distributionnetwork cover 30% of service area. Manage and Control LBS in distributionnetwork cover all of service areaOutage area monitoring and managementsystem for HV and MV network Outage monitoring and managementsystem all networkAutomatic service restoration (Self-

healing) in some area. Automatic service restoration (Self-healing) in all areaAsset management

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14

Stage 1

2012 2016

Laying the Foundations

Stage 2

2017 2021

Large Scale Implementation

ServiceAutomatic meter reading (AMR) for commercial and industrial customerDaily load profile and power consumption monitoring for customer via internet andmobile phoneStreet light control

Smart Grid Roadmap

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15

Stage 1

2012 2016Laying the Foundations

Stage 2

2017 2021Large Scale Implementation

Energy

conservation

&

Alternativeenergy

Support integration of SPP/VSPP and

renewable energy

Monitoring and control SPP/VSPP and

renewable energy in widely areaPilot project of 20 EV and 10 charging

stations to study the effect to power

system

Support widely used of EV and charging

station and electric vehicle to grid (V2G)

Pilot project of energy storage Energy Storage for powersecurity

Building Energy Management System(BEMS) Integration of BEMS and home energymanagement system

Smart Grid Roadmap

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MEAs Smart Grid Projects

objectiveProject

EMS DMS SA BEMS EV ESS AMR

Substation Automation

According toIEC 61850p

Remote control of distribution

switch with Distribution

Management System

pOutage monitor in high

voltage and medium voltage

system

p p p pself-healing in some area p p pAMR for Commercial and

industrial customerp

Ready for SPP/VSPP and

Renewable Energy connectionp p p p

Pilot use of EV and charging

stationp

Pilot use of Energy Storage pBuilding Energy ManagementSystem p

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MEAs Smart Grid Implementation Plan

and BudgetBudget (MBaht)

Project 2555 2556 2557 2558 2559 Total

EMS - 40.0 311.1 - - 351.1

DMS 360.3 561.8 475.84 121.80 121.80 1,641.54

SA 150.0 165.0 180.0 200.0 220.0 915.0

BEMS - 34.0 36.0 17.0 20.0 107.0

EV 20.5 20.5 15.25 15.25 - 71.5

ESS - 0.5 - 20 - 20.5

AMR 328.172 - 360.85 - - 689.022Total 858.97 822 1379 374.1 362 3,795.66

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Pilot AMI

http://localhost/var/www/apps/conversion/tmp/scratch_4/AMI%20for%20Smart%20Substation.pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_4/AMI%20for%20Smart%20Substation.pdf

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VSPP

VSPP or Very Small Power Producer is a powergenerator of a private sector , state agency , stateowned enterprise or individual who generate and

sell electrical power less than 10 MW to MEA orPEA. Fuels which are used in a power generationprocess are solar energy , biogas and biomassenergy , hydropower , natural gas and etc. The

objectives for purchasing electrical power fromVSPP are to support an efficient use of resourcesand reduce pollution effect to the environment

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Number of VSPP

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Condition or regulations to be

authorized as VSPP

Power Generation Using Renewable Energy (

attached 1 )

Power Generation Using Cogeneration Energy

( attached 2 )

http://localhost/var/www/apps/conversion/tmp/scratch_4/Regulation%20-Renewable%20(attached%201).pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_4/Regulation%20-Cogeneration%20(attached%202).pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_4/Regulation%20-Cogeneration%20(attached%202).pdfhttp://localhost/var/www/apps/conversion/tmp/scratch_4/Regulation%20-Renewable%20(attached%201).pdf

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The procedure to be authorized as VSPP

1. Procedures and criteria for consideration of

power purchase from VSPPs.

2. Conditions for purchasing electrical powerfrom VSPPs.

3. Power purchasing point and connection point.

4. Costs incurred for VSPPs.