Impact of Ό-STA TCOM on voltage sag in normal distribution and wind connected systems under different faults

Severe environmental impacts caused by the fossil fuel based power plants and the escalating fuel costs are the major challenges faced by the electricity supply industry. Renewable energy sources (RES) like wind, solar etc. is a viable solution to the increasing day-by-day energy demand. But the integration of wind power generators to the grid can cause high degree of power quality (PQ) problem. Custom Power Devices are preferred to mitigate the most common type power quality disturbance like voltage sag and voltage swell. Renewable Power Generation Companies (RPGC) are made an agreement to abide the grid codes at the time of wind integration to grid that they will compensate the reactive power under fault conditions. This paper deals with the analysis of the effectiveness of the D-STATCOM for mitigating voltage sag under different fault conditions in a distribution system connected with wind generator. The modeling and simulation are carried out by using PSCAD. The simulation results show that D-STATCOM has maintained good voltage regulation on different fault conditions and helped to maintain real power and reactive power compensation.