Voltage Controlled DSTATCOM Using Fuzzy Controller for Power Quality Improvement

Abstract

The proposed schemes show voltage controlled distribution STATCOM compensator advantages over the traditional voltage controlled DSTATCOM. The scheme generates a new algorithm for voltage controlled mode operation of distribution STATCOM compensator to generate reference voltage. The proposed schemes ensure the unity power factor (1.0 p.u) to be achieved at the load terminal during nominal operation which can’t be done in traditional method. The DSTATCOM injects lower current and reduces loses in voltage source inverter and feeder, further the capacity of compensator to mitigate the voltage sag is increased. The DSTATCOM can switch between current control mode (CCM) and voltage control mode (VCM) mode any time needed using fuzzy which is not possible in the traditional method. The system also apt in tackling power quality problems by providing power factor correction, voltage regulation and can free the system from harmonics by eliminating them and maintain load balance. The experimental results along with simulations are demonstrated the system is efficient enough.