3MWPV Plant

Filosofía y Ciencia

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3MWPV Plant
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  Indian Institute of ScienceRenewable Energy Systems ReportsA case study of 3-MW scale grid-connected solar photovoltaic power plant at Kolar, Karnataka   Performance assessment & recommendations  H. Mitavachan, Anandhi Gokhale and  J. Srinivasan REPORT IISc-DCCC 11RE 1 AUGUST 2011 N  D I  A  I  N O   T  E U T  F   T I  S  N  I E  C  SCI E N Divecha Centre for Climate Change  T he Divecha Centre for Climate Change was established at the Indian Institute of Science in January 2009 with a generous financial contribution from Arjun and Diana Divecha and the Grantham Foundation for the Protection of the Environment.The primary goal of this Centre is to understand climate variability and climate change and its impact on the environment. The Centre has undertaken outreach activities to create awareness among people and policy makers about climate change and its consequences. This has been done through workshops, lectures and quiz contests. An annual invited public lecture called the ‘Jeremy Grantham Lecture on Climate Change’ has been organized. The Centre has identified technologies to mitigate climate change in collaboration with entrepreneurs and different engineering departments in the Indian Institute of Science. The Centre is also working with Grantham Institute for Climate Change at Imperial College, London, on the impact of climate change on water.  Indian Institute of ScienceRenewable Energy Systems Reports H. Mitavachan, Anandhi Gokhale and  J. Srinivasan REPORT IISc-DCCC 11RE 1 AUGUST 2011 N  D I  A  I  N O  E U T  F   T I  T  S  I  N   E  S  C  CI E N Divecha Centre for Climate Change A case study of 3-MW scale grid-connected solar photovoltaic power plant at Kolar, Karnataka   Performance assessment & recommendations   Karnataka Power Corporation Limited (KPCL) has established 3 MW capacity peak grid-connected solar photovoltaic power plant near Yalesandra village in Kolar district of Karnataka, which is the first of its scale in India. After the site preparations were completed the first segment was installed in 4 months, followed by the second and third segments in the next two months. The plant was fully commissioned on 27 December 2009. The Yalesandra plant is one among 20 such Mega-watt size solar power plants in India, *as on 31st July 2011. India has an ambitious plan to build large grid-connected solar power plants, with a cumulative installed capacity of 20,000 MWp by 2020, under the National Solar Mission. Hence, it is essential to document the performance of the first large-scale grid-connected solar power plant installed in Karnataka. In this report we discuss the performance of the photovoltaic solar power plant in Kolar during 2010. 0 The Yalesandra power plant is located at a latitude of 12 53' and a longitude of 0 78 09'. The overall area occupied by photovoltaic modules is 10.3 acres. The plant has 3 segments with each segment having an installed capacity of 1 MW. p Each segment has 4 inverters with a capacity of 250 kW each. There are 13,368 modules (557 arrays with 24 modules per array) that contain mono-crystalline Silicon solar cells. The solar photovoltaic modules are connected such that a voltage of 415 volts is generated at the output of each inverter. This is stepped up to 11 kV by a step-up transformer and connected to the existing 11 kV grid.The total electrical energy generated by the Yaleasandra plant during 2010 was 3.34 million kWh and 3.30 million units were sold to the grid. Although the performance of the photovoltaic modules was good, there were teething troubles associated with the inverters, which was the main reason for reduced energy generation. The impact of temperature variation of modules on their performance was studied both on daily and yearly basis. It is observed that the efficiency of the plant is more sensitive to temperature than the solar insolation. Daily datasets of five minute average data have been used for in-depth analysis. Some of the maintenance and technical related problems faced by the plant operators have also been discussed.   Executive Summary
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