基于系统电流检测的并联有源电力滤波器数字控制方法.pdf

29 卷 24 期 电 网 技 术 Vol. 29 No. 24 2005 年12 月 Power System Technology Dec. 2005 文章编号：1000-3673 （2005 ）24-0049-05 中图分类号：TM714 文献标识码：A 学科代码：4704051 基于系统电流检测的并联有源 电力滤波器数字控制方法 曾繁鹏，王建赜，伏祥运，纪延超 （哈尔滨工业大学 电气工程及自动化学院，黑龙江省 哈尔滨市 150001） A Novel Digital Control Method for Shunt Active Power Filter Based on Line Current Detection ZENG Fan-peng，WANG Jian-ze，FU Xiang-yun，JI Yan-chao （School of Electrical Engineering and Automation，Harbin Institute of Technology， Harbin 150001 ，Heilongji ang Province，China ） ABSTRACT: On the basis of system current detection a novel 关键词：有源电力滤波器；谐波；数字控制；脉宽调制；电 digital control method for shunt active power filter is proposed. 力系统 Applying the proposed method to the shunt active power filter 1 引言 in which the pulse width modulation (PWM) voltage source converter is adopted in the main circuit, in the three-phase 非线性负载的大量使用导致电力系统中的谐 three-wire system the active power filter can effectively 波含量日益增加，电能质量日益恶化。传统抑制谐 eliminate harmonics of nonlinear load and compensate its 波的方法是采用LC 调谐滤波器，但它只能补偿固 reactive current. In this control method only system current and 定频率的谐波，并且补偿特性受电网阻抗和运行方 DC side voltage are to be detected and no referential current is 式的影响，易与系统发生并联谐振，已不满足现代 needed. Comparing with traditional control methods, the 电力系统发展的需要。有源电力滤波器是一种能动 advantages of the proposed method are simple calculation and 态抑制谐波、补偿无功和消除负载不对称的新型电 less operating parameters to