Fuzzy PID Controlled DSTATCOM for Delivering Quality Power

DSTATCOM is a shunt compensation device connected at Point of Common Coupling (PCC) of Distribution System to deliver quality power. The proportional & integral controller (PI) of DSTATCOM needs tuning at the time of installation as well as due to change of network parameters and working conditions, can provide a slower response. To ensure plug and play feature to the device with faster response Proportional Integral Derivative (PID) action with fuzzy interference system (FIS) is implemented in this paper. With respect to SRF theory based simple PI controller a better response is obtained with fuzzy PID controller in terms of dynamic voltage profile and Total Harmonic Distortion (THD).