基于Hilbert移相器和准同步算法的无功功率测量  

Reactive Power Measurement Based on Hilbert Phase Shifter and Quasi-synchrony Algorithm

作　　者：任晓[1] 庞力[1] 方春恩[1] 李伟[1] 苏育均[1] 

机构地区：[1]西华大学电气信息学院,四川成都610039

出　　处：《山东电力高等专科学校学报》2012年第1期7-9,共3页Journal of Shandong Electric Power College

基　　金：四川省电力电子重点学科项目(编号:SZD0503);智能电气设备重点实验室项目(编号:XZD0819)

摘　　要：为了准确测量电网中谐波(非正弦电路)的无功功率,文中介绍了由2对IIR型Hilbert移相器和准同步算法相结合的方法来提高测量的精度。其中,Hilbert移相器解决了传统无功算法无法测量电网谐波无功功率的问题;采用准同步算法可以保证电网频率波动下的测量精度。最后实验结果证明,此算法容易在FPGA芯片中具体实现,测量误差小于0.05%,适合用于对电网的无功功率测量。To measure accurately the reactive power of the harmonic （non-sinusoidal circuit） in power sys- tem, the paper introduces a method integrating two pairs of Hilbert filters and quasi-synchrony to im- prove measurement accuracy. Hilbert phase shifter can solve the problem that traditional reactive pow- er algorithm can＇t measure non-sinusoidal circuit. Quasi-synchrony can overcome frequency fluctua- tion and make sure measurement accuracy. Finally, the tested results show that the introduced algorithm can implement easily in FPGA and the error below 0.05% .Thus, the method can be applied on reac- tive power measurement.

关 键 词：Hilbert移相器 准同步算法 无功功率测量 谐波 

分 类 号：TM761[电气工程—电力系统及自动化]