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Pv solar layout
- 1. PROCESS FLOW DIAGRAMFORGWANDAPVSOLAR POWERSTATION LOCAL 33/132kV SUBSTATION EXISTING GWANDA 132kV SUBSTATION PV ARRAY DC 3 PHASE 315V AC 33kV INVERTER (2 x 500kVA) STEPUP TRANSFORMER 132kV TRANSMISSION LINE UP TO 100 ARRAYS (9300 sub-arrays) UP TO 100 INVERTERS UP TO 100 TRANSFORMERS
- 2. PV ARRAYS A numberof solar cells electrically connected to each other and mounted in a support structure are called a photovoltaic module. When modules are fixed together in a single mount they are called a panel. Photovoltaic panels can then be wired together to produce desired power, voltage and current in series (string) and parallel combinations to create a PV array. In our case, there are 22 panels in a string and 94 of these strings are connected in parallel to form a PV sub – array feeding into a 500kW inverter. INVERTERS Inverters are used to transform DC voltage into 3 phase AC voltages. Grid tied inverters will be used and these operate coupled to the electric distribution network and therefore produce almost perfect sinusoidal voltages and currents. STEP – UP TRANSFORMERS These transformers will step-up the 3 phase 315 Volts produced by inverters to 33kV distribution voltage which will be fed to the local 33/132kV substation. LOCAL SUBSTATION The local substation steps up the 33kV to 132kV transmission voltage. 132KV GRID TRANSMISSION LINE The new 132kV grid transmission line will be constructed to link the PV solar power station to the national grid via the existing Gwanda 132kV substation.