Harmonic Compensation for Nonlinear Loads Fed by Grid Connected Solar Inverters Using Active Power Filters

The paper presented shows use of active power filter for improving the power quality of a three phase power network having grid tied bidirectional solar inverter and a nonlinear load. In particular, operation of the active filter in the context of quality of line current waveform has been outlined. In this study a three phase PWM voltage source inverter has been used as active power filter. The PWM signals for the shunt active power filter have been generated using instantaneous reactive power theory in time domain. The study also shows application of symmetrical component theory for synchronization of the solar inverter with the grid. The proposed power network has been simulated using PSIM software.