Voltage regulation using DSTATCOM in Distribution system for enhancement of power quality

A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or a mis-operation of end user equipment’s. In industries of diversified specifications, there is a big place for various kinds of equipment ranging from machinery to computers. All of them need sufficient voltage and good power quality to accomplish the respective industrial operations with greater efficiency. Nowadays, power quality concerns are prevalent in industries and they account for operational uncertainties. Upon finding better solutions for removing such concerns, the industries can get fruitful results. Among all controllers, DSTATCOM is most effective solution of power quality problems. DST A TCOM is shunt connected device and it is widely used as power quality mitigation device. The performance of DSTATCOM depends upon the control algorithms those are used to generate reference source current. In this paper PV based DST A TCOM is used so the DC voltage regulation is also very important that can vary with the irradiation level. To control the DSTATCOM, dq and pq based algorithms are used Simulation results demonstrate the effectiveness of controller of DST ATCOM for reactive power compensation, harmonic reduction and load balancing under the unbalanced conditions.