Application of D-STATCOM for load compensation with non-stiff sources

Now a day's power quality is serious problem in power network. To overcome this problem an innovative device D-STATCOM is used. D-STATCOM (distribution static compensator) is FACTS device used to solve all power quality problems which connected in parallel with system. The main function of D-STATCOM is, it generates or absorbs the reactive power at point of common coupling (PCC), so that power quality can be maintained. Power quality problems are important issue in distribution system. In this paper new method for D-STATCOM with non-stiff sources is proposed for the load compensation it also considers linear and non linear loads. Load flows from distribution system in presence of feeder impedance due to this distort voltage and current at the PCC in this situation source called as non-stiff source. D-STATCOM also used for compensation of reactive power and unbalance caused by various loads in distribution systems. This method uses the series and shunt filter, one of advantages of this method is losses in inverter are reduced. The switching command of voltage source inverter (VSI) is generated using hysteresis band current control method. The simulation of proposed method is carried out using Matlab Simulink.