Power Quality Improvement Using UPQC for Wind Farm Generation System
|G. Laxminarayana1, G. Umesh Kumar2
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Normally the wind energy conversion system Wind Farms (WF) are employing squirrel cage induction generator (SCIG) and these are directly connected to the grid. In modern power system for convenience purpose the WF are connected through medium voltage (MV) distribution headlines. In this case a situation arises i.e. the power generated by WF is comparable to the transport capacity of the grid. This case is known as Wind Farm to Weak Grid Connection. Due to this poor voltage regulation problems are arise at the point of common coupling (PCC).The overall problems like weak grids ,wind power fluctuations and sudden load changes in system cause of this the power quality will be disturb. To overcome these problems a compensate technique will be use at pcc. In this technique using Custom Power devices technology (CUPS) efficiently regulates all problems. In this project propose a Unified Power Quality Compensator (UPQC) Custom power device. This device develop to regulate the Voltage in the WF terminals and to reduce voltage fluctuations at grid side. The internal control strategy is based on the management of active and reactive power in the series and shunt converters of the UPQC, and the exchange of power between converters through UPQC DC–Link. Simulations results show the effectiveness of the propose compensation strategy for the enhancement of Power Quality.