POWER QUALITY USING ENERGY INTERFACE DSTATCOM WITH GENERAL CONTROL SCHEME

An implementation of a three phase distribution static compensator (DSTATCOM) for compensation of loads in a distributed system using learning vector quantisation (LVQ) control algorithm. The distribution static compensator used for harmonic elimination, reactive power compensation and load balancing of the distributed system. This LVQ control algorithm produced output is combination of fundamental limit values of active and reactive power component of load currents and required for estimation of reference supply currents. It is based on a double supervisory system each weighted vector is modified by input limits. The input limits are trained outputs of the first stage learning limits. It is needed for accurate estimation of compensation currents for the Voltage Source Converter (VSC) used in DSTATCOM. This type DSTATCOM is developed using a digital signal processor to the proposed control approach and its performance is studied under a steady state and dynamic conditions. This performance of the DSTATCOM is satisfactory with the proposed control algorithm under linear and non-linear loads are commonly used in the distribution system.