STATCOM based voltage and frequency regulator for self excited induction generator

This paper presents the digital design of a STATCOM based voltage and frequency regulator for self excited induction generator (SEIG) feeding linear and nonlinear loads. The SEIG have inherent poor voltage and frequency regulation. The voltage and frequency of the SEIG system depend upon the load current and power factor of the load for constant power operation with fixed excitation capacitor employing unregulated turbines. The performance of SEIG is largely affected by load harmonics. A current controlled voltage source inverter working as STATCOM is used for harmonic elimination, load balancing and it provides reactive power compensation. A DC chopper with dump load is connected across DC bus capacitor to regulate varying consumer load. The control algorithm has been co-simulated with processor in the loop (PIL) using TMS320F2812 fixed point DSP. The transient behaviour of SEIG-STATCOM system at different operating conditions such as application and removal of balanced, unbalanced and nonlinear load is investigated.