Three phase rectifying bridge DC side parallel type active electric power filter

A type of three-phase commutating bridge direct current side parallel active filter is disclosed. The filter includes: capacitance, inductance, three low frequency bidirectional power switches and four high frequency bidirectional power switches. Thereinto: three low frequency bidirectional power switches are connected with three input ends of three-phase commutating bridge, and two serial bidirectional booster power transformer which consist of capacitance, inductance and four high frequency bidirectional power switches are paralleled in the direct current side of the whole commutating bridge. The invention suits for the harmonic wave management of three-phase commutating bridge especially. Comparing with the traditional dynamic current source electric filter, the invention reduces the number of high frequency source switches; and comparing with power density calibrator, the invention just processes the harmonic component of the load current, the processing current is smaller, and it can reduce the nominal capacity of harmonic wave management device greatly, and reduces the cost greatly too.