基于瞬时无功功率理论的谐波电流检测改进方法及其数字低通滤波器的优化设计  

Instantaneous reactive power theory based improved harmonic current detecting method and its digital low-pass filter optimized design

作　　者：廖代发[1] 唐忠[1] 陈永炜[1] 江友华[1] 

机构地区：[1]上海电力学院计算机与信息工程学院,上海200090

出　　处：《电力科学与技术学报》2009年第1期74-80,共7页Journal of Electric Power Science And Technology

基　　金：上海市重点科技攻关计划(071605125)

摘　　要：针对有源滤波器实际工程的需要,提出一种基于瞬时无功功率理论的改进ip-iq谐波和基波无功电流检测方法,可简化复杂的数学变换,能直接应用于三相三线制、三相四线制和单相系统谐波和基波无功电流的检测.并综合考虑FIR滤波器与IIR滤波器的优缺点,进一步提出均值滤波器与Elliptic滤波器串联滤波的二级滤波新方法.仿真结果表明该方法检测实时性好、精度高、易实现,具有实用价值.In response to the application of active power filter, an improved ip - iq algorithm for harmonic and fundamental reactive current detection based on instantaneous reactive power theory has been presented in this paper. The improved method can decrease the complex mathematical transformation and can be directly used in harmonic currents and fundamental current detection for three-phase three-wire, three-phase four-wire and single-phase distribution systems. A new dual-filter method of series filter technology is proposed, based on the series of average filter and Elliptic filter considering the advantage and disadvantage of FIR filter and IIR filter. Simulation results show that the proposed detection method is with real-time, high precision and easy implementation and application in distribution systems.

关 键 词：有源电力滤波器 谐波检测 瞬时无功功率理论 均值滤波器 Elliptic滤波器 

分 类 号：TM935[电气工程—电力电子与电力传动]