并联型三相有源滤波器谐波电流检测研究  

Harmonic Current Detecting in the Three-Phase Shunt Active Power Filter

作　　者：王琦[1] 徐至新[1] 琚兴宝[1] 钟和清[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《通信电源技术》2006年第6期13-15,24,共4页Telecom Power Technology

摘　　要：在有源滤波器设计中,谐波电流的实时检测与分离是其中的关键环节。文中分析了基于瞬时无功理论的ip、iq法检测谐波电流的基本原理与实现方法。ipi、q法与DFT谐波电流检测方法相比,实时性能更好,容易实现,而且不受电网电压波形畸变的影响。仿真和实验表明,采用ipi、q法能够实时、准确地检测出非线性负载的谐波电流和无功电流。Harmonic current detecting promptly is very important in the design of APF. Based on the theory of instantaneous reactive power, this paper analyses the fundamental and implementation of the ip、 iq method. Comparing the DFT method, the ip 、iq method is more prompt. The effectiveness of the model of discharging current is verified by simulation. Experimental results demonstrate that the discharging device based on three-phase PWM VSC can both discharge battery at a highly precise current, and can transfer the energy of battery into the public utility with low THD current and unity power factor.

关 键 词：非线性负载 谐波电流 瞬时无功理论 有源电力滤波器 数字滤波器 数字信号处理器 

分 类 号：TN713.8[电子电信—电路与系统] TM933.1[电气工程—电力电子与电力传动]