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This paper elaborates on the output filter of the high power shunt Active Power Filter (APF). Aimed to reduce the switching ripple produced by APF itself injecting into the power grid, a scheme applying high-pass filter capacitor branch at the grid side is proposed. Based on the model of the output filter, design principle and process of it is provided and the relevant parameters of the high-pass...
Shunt Active Power Filters (APFs) are suitable to compensate current-type harmonics generated by nonlinear load, but large power and high compensation precision is difficult to be obtained due to low switching frequency of high power switch devices e.g. IGBTs and phase lag of digital control loop. In this paper, a high equivalent switching frequency is obtained in spite of low real switching frequency...
Shunt Active Power Filters (APFs) have been proved useful to correct distorted currents caused by nonlinear loads in power distribution systems. This paper presents a dual-repetitive control algorithm, which consists of one fundamental repetitive period to ensure the APFs' high tracking precision of both even and odd harmonics, and the other harmonic repetitive period to enhance the dynamic response...
Shunt Active Power Filters (SAPF) could restrain harmonic current in distribution grid effectively and their compensation precision relies heavily on the design of current loop controllers. Since the reference and feedback signal of the current controller are composed by different harmonic components and the bandwidth of conventional ProportionIntegral (PI) controller is limited, this controller cannot...
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