Mitigation of Harmonics in A Distribution System Using Shunt Active Power Filter

Abstract

Now-a-days, power system network is more complex and most the loads are inductive in nature. Switching of large inductive loads, causes a drop in the voltage at the load bus due to increase in VAR demand which lead to voltage instability. In order to keep the voltage with in a limit. Reactive power compensation device such as TCSC, UPFC, SAPF etc., are employed. In utility applications, a SAPF provides leading or lagging reactive power to achieve system stability during transient conditions. The main objective is to control the dynamic behavior of interconnected power system. For enhancing the power quality SAPF is using with neural network controller. A neural network controller is used to generate gate pulse for each leg of voltage source converter of SAPF for both linear and nonlinear loads. The neural network controlled SAPF has been simulated for current balancing and harmonic compensation. The simulation is carried out in MATLAB and the result shows the performance of the proposed PSO-SRF-PI controller is more effective than other conventional controllers.