Adaptive Control Algorithm for DSTATCOM in three phase four wire distribution systems for Power Quality Improvement

This adaptive control technique has been developed for four-leg VSC based DSTATCOM using MATLAB Simulink environment and implemented in three phase four wire distribution systems. In this technique three reference currents are estimated from fundamental active power component of three distorted load currents. The performance of DSTATCOM found satisfactory in terms of load balancing, power factor improvement, source current harmonic elimination, and self-regulated DC bus voltage using adaptive control technique under steady state and dynamic condition using nonlinear load.