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Solar Microgrid Technical Presentation For Provident Sunworth

4TH FEB 2018

Introduction Solar Microgrid Proposal for Provident Sunworth

January 25, 2018 Slide 2

–  Provident Sunworth housing complex has a collective loads of around actual load of around 249kW which includes both resistive and inductive loads.

–  Majority of these loads are inductive in nature which is consumed by WTP and STP

–  Provident Sunworth group wants to install around 100kWp solar microgrid power plant in phase1, in order to reduce its electricity bill and to reduce the Diesel consumption during power cuts

–  The solar power plant will be installed on a 10 feet elevated structure in order to utilize the space underneath.

–  This will be a flag ship projects.

Introduction

Some of the facility includes for both phase-1 & phase-2: Such as Club House, Amenity Area Lighting & WTP These are the major contributors for maintenance charges in form of electricity bills for common area

Connected Load details for Provident Sunworth


Sl No Location Type of Load

Load in Watts Load in Kw

Connected Actual Connected Actual

1 Common Area Lights Lighting 37694 37694 37.694 37.694

2 Club House Lighting 10313 10313 10.313 10.313

Inductive 41400 41400 41.4 41.4

3 STP Inductive 163400 103500 163.4 103.5

4 WTP Inductive 78500 56100 78.5 56.1

Total 331 249

Concept MGS100 Microgrid System


Operating modes of MGS100

Block Diagram MGS100 Microgrid System


On-Grid modes –  Normal operating mode –  Power export mode –  Battery charge mode

•  Charging from solar •  Charging from grid

Off-grid modes –  Normal mode –  Battery charge mode –  Limit mode Night mode –  Battery hold mode –  Battery charge mode

Night off-grid mode Recovery Modes –  Deep discharge mode –  Battery recovery mode

Operating modes MGS100 Microgrid System


On-Grid modes MGS100 Microgrid System


Normal operating mode –  Grid = Available –  Solar = Available –  Load power>Solar power –  Battery charge = 100%

Grid and solar will be supporting the loads in this condition. Power drawn

from the grid will be Grid=Load-Solar. Battery charge will be

reserved in this condition.

Note: “Grid” can be BESCOM grid or from any AC generator (DG or Biomass)

On-Grid modes MGS100 Microgrid System


Power export mode –  Grid = Available –  Solar = Available –  Solar power>Load power –  Battery charge = 100%

Loads will be completely supported by solar. Excess solar power will be exported to grid. Please note this

mode must be disabled in case DG/AC Generator is used as the source

Note: Power export can be disabled (Settable parameter)

Battery Charge Modes MGS100 Microgrid System


Charging from solar –  Grid = Available –  Solar = Available –  Solar power>Load power –  Battery charge < 100%

In this mode, complete load will be supported by solar. Excess solar power will be used to charge the

battery through bi-directional converter.

Battery Charge Modes MGS100 Microgrid System


Charging from Grid –  Grid = Available –  Solar = Available –  Load power>Solar power –  Battery charge < 100%

In this mode, load will be supported by solar and grid. Grid power is also used to charge the battery. Power drawn from the grid is, Grid=Load-

Solar+Battery charging power

Note: MGS100 has two independent charging paths 1. Grid to Battery 2. Solar to battery

Off-Grid Modes MGS100 Microgrid System


Normal mode –  Grid = Not Available –  Solar = Available –  Load power>Solar power –  Battery charge < 100%

In this mode, load will be supported by solar and battery. Power drawn from battery will be, Battery=Load-

Solar

Note: “Evening Priority**” mode could be activated for off-grid only systems

**In Evening priority mode, priority will be given to charge the battery during daytime so that loads could be powered from battery during night time. During daytime, loads will be catered by solar only if Battery>90% in this mode



Battery charge mode –  Grid = Not Available –  Solar = Available –  Solar power>Load power –  Battery charge < 100%

In this mode, the loads will be completely supported by solar. The excess solar power will be used to

charge the batteries.



Limit mode –  Grid = Not Available –  Solar = Available –  Solar power>Load power –  Battery charge = 100%

In this mode, the loads will be completely supported by solar. The excess solar power will be limited (Clipped off) in order to maintain

stability in the system. The generation from Solar=Load

Note: The same “limit mode” will be active in case DG/BM is connected for ensuring no reverse power flow to generator

Recovery Modes MGS100 Microgrid System


Deep discharge mode –  Grid = Not Available –  Solar = Not Available –  Battery charge < %AbsMin

(Absolute Minimum)

In this mode, from the night off-grid mode battery continues to discharge

and support the loads until the battery charge % reaches a setpoint, AbsMin (Absolute

Minimum). Once the battery reaches %AbsMin, all the loads will be dropped in order to protect the

batteries and keep the control circuit active

Salient features

Salient Features MGS100 Microgrid System


“Plug & Play” Solution

Converter & Charger

Section

Solar Inverter Section

Controller




Converter & Charger

Section


Controller

–  All necessary protection on input & output side are incorporated

No need of ACDB or DCDB



–  All necessary protection on input & output side are incorporated

–  Smaller installation and commissioning time

Just connect 4 sets of cables and commission the system!


Converter & Charger

Section


Controller

#1- Grid/DG

#2- Battery Bank

#3- Solar Array

#4- Loads



Modular, Scalable Solution

Converter & Charger

Section


Controller

–  Capacity of Solar/Load can be increased by adding more inverters in parallel

–  Following solar capacities (Multiple combinations with it are possible) •  20 kW •  27.6 kW •  50 kW

–  Following combinations of load capacities are possible •  40kW

Easily scalable to meet different customer needs


Converter & Charger

Section

40kWx2=80kW

27.6+20=47.6kW



Delivers Quality Power

Converter & Charger

Section


Controller

–  Loads will not be interrupted to source side variations

MGS100 delivers the compensation and clean power is delivered



Delivers Quality Power

Converter & Charger

Section


Controller

–  Loads will not be interrupted to source side variations

–  Input voltage and frequency variations will not affect output V & f

MGS100 delivers the compensation and clean power is delivered

V=402 v f=48.2Hz

V=415 v f=50Hz



Monitor/Modify Remotely

Converter & Charger

Section


Controller

–  The system data can be monitored and controlled locally as well as remotely

Data connection for remote monitoring to be present at site

RMA

HMI

Remote Monitoring

Local Monitoring

RMA – Remote Monitoring Adapter



Monitor/Modify Remotely

Converter & Charger

Section


Controller

–  The system data can be monitored and controlled locally as well as remotely

–  The system is IoT ready. Any future modification in the system program like (Grid Export enabling-disabling/DG addition can be done remotely)

Data/internet connection for connecting to the system to be

available at site

RMA

HMI

Remote Monitoring

Local Monitoring

RMA – Remote Monitoring Adapter

DG

–  True 3 phase solution (No paralleling of 3 x 1 Phase inverters) –  Integrated, customizable “Plug & Play” solution –  Modular, scalable solution –  Delivers quality power to the loads

•  Loads will not be interrupted for source variations •  Input voltage and frequency variations will not affect output V & f •  Operates with 100% phase to phase imbalance continuously

–  Support sources of capacity lesser rated than load (DG rating < Load rating) –  Operates with large voltage and frequency variation èRequisite for Biomass generator –  Capability to monitor/modify remotely –  Seamlessly can operate with multiple sources simultaneously

•  DG-Solar-Grid-Battery •  Biomass-Solar-Grid-Battery



Salient Features

Grid-tied Vs Microgrid Solar Microgrid Proposal for Provident Sunworth


–  Usually consists of a simple, passive DC-AC inverter which will convert input DC from solar PV to output AC

–  It cannot work without absence of grid –  System can synchronize with DG however it can backfeed to DG

and can damage the DG (Need additional sophisticated controllers for proper operation)

–  There will be interruption to the loads during power cut, until DG is turned ON and synchronized

–  System has no control over the sources, it will just synchronize and pump power to grid

–  System is cheaper. As there is no controller or batteries –  System suitable for MW scale projects and locations with no

powercuts –  Solar penetration will be limited to base load

–  It consists of several converters like charger, rectifier, bi-directional converter in addition to DC-AC inverter

–  It can work islanded, even with absence of grid or DG –  System can synchronize with DG and will never back feed to DG. It

also maintains required minimum load on DG –  There will be no interruption to the loads during power cut. DG can

be turned ON only if required. Can work islanded –  System is intelligent. Has control over the loads and sources. It

gives priority to ‘cheapest’ sources first then to costly sources (DG) –  System is costly as there is a sophisticated controller, charger,

rectifier and batteries. Also reduces peak demand of the grid –  Suitable for smaller plants of any scale –  Solar penetration can be upto peak load

Grid-Tied plant Microgrid plant

Layout Solar Microgrid Proposal for Provident Sunworth


–  � à Solar PV plant location –  � à Cable routing/connection point (~600mtrs)

to main LT panel (Can be changed with new scheme)

–  � à Club house location –  � à WTP feeder location (pls locate) –  � à Lighting feeder location (pls locate)

Layout

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Proposed scheme


Solar Microgrid Proposal for Provident Sunworth


Structure Assembly Drawing

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