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Shunt Active Power Filter (APF) is a good solution to eliminate current-type harmonics generated by nonlinear load. Challenges exist in realization of large power and high compensation precision simultaneously due to the limited capacity of semiconductor devices, thermal management, high slew rate of compensation current, low switching frequency and phase lag of digital control loop etc. This paper...
Shunt Active Power Filters (APF) have been proved useful to compensate current harmonics in power grids. In traditional shunt APF, the passive filter, which serves as the output filter, is usually using uncoupled inductors. In this paper, the coupled inductors are adopted in place of traditional uncoupled ones. And both the equivalent circuit and the coupled inductor's selecting principle are given...
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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