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To capture the maximum amount of irradiance, the array needs to be focused towards the sun position, thus maximizing effective area and receiving direct beam radiation test locations from states such as Karnataka (Bellary and Chitradurga), Tamil Nadu (Tiruchuli and Parmakudi), Andhra Pradesh (NP Kunta and Gani Solar Park) and Telangana (Mahabubnagar and Sangareddy) was taken into consideration. The states are chosen because large capacity Solar Parks is being planned at these places in near future. The meteorological data has been taken from Meteonorm-7.0. Using PVSYST 6.38, simulation was performed and generated the performance report of Horizontal single Axis Tracker (HSAT) and Fixed Tilt (FT) solar PV power plants for all the considered locations. This study investigates performance of HSAT w.r.t Fixed Tilt solar PV power plants in Southern States of India. Project Details The proposed location coordinates are given in Table1. These locations experience an annual average ambient temperature of around 28°C. The range of yearly average global horizontal radiation incident on the proposed sites is 5.4-5.7 kWh/m2/day. Horizontal Single-Axis Tracker (HSAT) Horizontal single axis trackers account for the most installed capacity globally as far as solar tracker is concerned. HSAT is the most common type of single axis tracker design. A horizontal single axis tracker rotates from east to west on a fixed axis which is parallel to the ground. The tracker SOLAR POWER is navigated by a small motor/actuator connected to the long central drive arm which rotates east to west between rows of panel mounted on torque tubes. There are other mechanisms available but principal objective remains the same, to orient panels from east to west through the day as the sun moves. Analysis of HSAT Vs Fixed Tilt The generation for all considered locations are obtained from the simulation and compared graphically. From the above graph, it is evident that HSAT solar power plant would performs better than fixed tilt plant for all the locations throughout the year for the same installed capacity and for identical meteorological & operating conditions. A tabular representation shows the % generation gain of HSAT w.r.t fixed tilt for all the locations. The table 4 illustrates monthly as well as yearly average % gain of HSAT plant as compared to fixed tilt plant. TABLE 3. CENTRAL INVERTER CHARACTERISTICS Inverter Type Central Rated output power (kW) 1000 MPPT voltage range (V) 570-850 Euro Efficiency (%) 98.6 Input DC Voltage (V) 1000 Output AC Voltage (V) 380 West Sun at East Noon Fig1. Axis of rotation of HSAT. Fig2.Orientation of HSAT Tracker during the day. Fig 3. Comparison of Generation between HSAT &Fixed Tilt for different locations. 23 energetica INDIA · MAR | APR16


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