A new control scheme of series active filter for varying rectifier loads

It has been established that shunt active power filters are suitable for compensating harmonics in the current fed type harmonic producing loads, likewise the series active power filter (APF) are considered to be suitable for voltage fed type harmonics-producing load. This paper discusses the indirect current control approach in terms of its simplicity and effectiveness for the operation of a series APF. The simulated results show that a relatively low power series APF, with the indirect current control effectively compensates harmonics for the voltage fed type harmonics-producing load. It is also investigated that series active filter is able to self-support its DC bus through the control under varying load connected to rectifier.

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