Investigation of Distribution Static Compensator Formitigation of Nonlinear Loads

Abstract

This paper proposes a reactive power compensating device DSTATCOM with three phase five level voltage source inverter. Current related power quality issues can be mitigated using DSTATCOM as it is a device that is connected to a shunt. DSTATCOM's effectiveness and performance are determined by the control techniques used to extract the reference current component and create the control signal for the power electronic converter. PV system, one of the renewable energy resources is used to provide the voltage to the DSTATCOM module instead of a battery. To decrease the source current THD, the reference is constructed employing adaptive P-Q theory. current from the three phase Ac source current. PI controller is used which reduces damping and maximum overshoot. It also improves the rise time and decreases the bandwidth. PI controller is tuned by Fuzzy Logic in order to compensate for the distribution system's three phase voltage profile. This concept is implemented using Mat lab simulation. Simulation of proposed system reveals that Compensation with D STATCOM gives better results in terms of reduced THD.