Before extensive expansion of the grid supply in fur flung remote villages stand alone solar PV Systems played important role to meet the demand of minimum need of electricity.
WBREDA provided about 2,50,000 numbers of Solar PV Home Lighting systems and more than 11,000 Solar PV Street Lighting across the state. In addition, WBREDA operated 16 number stand alone type Solar PV Power plants of different capacity ranging from 25 kWp to 110 kWp at Sagar, Patharpratima and other remote locations in Sundarbans.
In addition, WBREDA also provided off-grid solutions to a number of institutions by installation PV System of different capacity. The institution includes PHCs, Schools, Colleges, Government Office, Guest House, Government Bungalows, Panchayet Office, Block Office, Forest Office etc.
In recent past, three rural libraries in Hooghly, eight health facilities in South 24 Pargansa and two schools in South 24 Parganas have been provided with Standalone PV Systems.
The school project includes installation of GRTSPV System at Government Aided / Sponsored Schools in the state with the following objectives:
So far 2089 numbers of schools have been served with a cumulative capacity 19.105 MWp. Based on the success of the school programme, State Government intended to provide GRTSPV System at its all schools, which are technically feasible. Similar approach has also been taken for Government Aided / Sponsored Colleges. So far, 81 colleges have been provided with GRTSPV Systems with cumulative capacity 1.316 MW.
During the current FY 2022-23, installation of GRTSPV Systems at 990 schools are in progress and tendering process has been initiated for installation of GRTSPV Systems at 900 schools and 50 colleges.
State Government launched an ambitious programme of rooftop solar systems namely “Aloshree’ programme. The objective of this programme is to install Grid Connected Solar Photovoltaic (GRTSPV) System in all government buildings and buildings of local bodies with technically fit for such installations. Under this programme, the beneficiary departments allocates fund for installation of PV Systems and WBREDA being State Nodal Agency implements the programme.
So far, Grid Connected Solar Photovoltaic (GRTSPV) Systems have been installed at 89 Government Buildings with a cumulative capacity of 3.740 MW.
Space is a major concern for deployment solar PV system in highly populated area like Kolkata. The problem can be addressed with innovative ideas to integrate solar in the buildings and public areas. Such idea has been explored with Solar Tree (Artifacts).
Three solar trees each unit of having 3 kWp solar PV modules have been set up at the “Bidyut Unnayan Bhawan”, Saltlake, Kolkata and four similar solar trees have been installed at Raj Bhawan, Kolkata.
Planning and implementation of solar PV power projects, solar radiation data is very much crucial to assess the expected generation. As part of the national programme, three numbers of automatic solar and meteorological measuring stations called the Solar Radiation Resource Assessment (SRRA) Stations have been set up at Indian Institute of Engineering Science, Shibpur, Jalpaiguri Government Engineering College and Domkol Engineering College. Out of the three SRRA, one station at Shibpore is Advanced Measurement Stations (AMS).
Solar Water Heating Systems collect the thermal energy of the sun and use it to heat water and the hot water is used for day-to-day activities. Solar Water Heating Systems in turns save convention fuel or electricity. In recent past ETC based Solar Water Heating Systems of cumulative capacity 31500 LPD at 82 Hostels and Homes under Backward Classes Welfare Department have been installed.
A Solar PV Power Plant of PV array capacity 10 MWp has been installed Bhajanghat under Krishnaganj Block, Nadia. The power generated from the project is evacuated to the nearest 33/11 kV Substation at Krishnaganj through 33 kV line of route length of about 10.3 km. The project has been set up in the plots measuring about 52.54 acres of government land allotted in favour WBREDA.
The project has been completed on 30 September, 2021.
The PV Power Plant comprises two sub systems each of having 5 MW of PV array. There are two inverters each of capacity 2.5 MW for each sub systems of capacity 5 MW. The output of the Inverters, at 600 V AC, have been stepped up at 33 kV using a 5 MVA three winding inverter duty transformer and fed to the grid.
Annual net generation of the Bhajanghat Solar Power Project during 2022 (Jan to Dec) found to be 14.16 MU.
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