MODIFIED SYNCHRONOUS REFERENCE FRAME STRATEGY FOR SELECTIVE-TUNED SINGLE PHASE HYBRID ACTIVE POWER FILTER

This paper shows the behavior of same structure of an hybrid active series power filter (HASPF) tuned in three different frequencies. The developed strategy is based on the Modified Synchronous Reference Frame Controller. The initial structure of the passive filter was chosen to be tuned for the fifth harmonic. The performance of the system is compared with and without the active compensation. The ability of the hybrid topology in changing the resonant frequency is shown. The active hybrid structure is first tuned for the fifth harmonic, further it is electronically re-tuned to the third and finally to the seventh harmonic. Practical results exhibits these tuning changes showing as close as the passive filter can approach the absolutely compensation for a chosen frequency. The algorithm of the HASPF is executed in the DSP TMS320F2812 and the inverter switching frequency is 20 kHz.