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Design of the Robust Active Power Filter under the Unbalanced and Distorted Source Voltages in Three-phase Four-wire Systems  

Min Joon-Ki (충북대 대학원 전기공학과)
Kim HyoSung (천안공업대학 제어계측과)
Choi Jaeho (충북대 전기전자공학부)
Kim Kyung-Hwan (이화전기 기술연구소)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.9, no.5, 2004 , pp. 420-429 More about this Journal
Abstract
This paper proposes a novel current control strategy on active power filters using PQR instantaneous power theory which can compensate the line current harmonics and the neutral line current under the unbalanced and/or distorted source conditions in three-phase four-wire systems. The characteristics of the inverter ac filters are analyzed and a novel digital controller are proposed to overcome the inherent time delay problem in digital controllers with designed control gain in this paper. The proposed current control method is based on a sinusoidal PWM for fully-digital implementation compared with a conventional hysteresis PWM. PSiM simulation results verify the good performance of the proposed current control strategy on shunt type APFs.
Keywords
Active power filter; PQR instantaneous power theory; Digital controller; Time delay; PWM method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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