基于准同步算法和IIR-Hilbert变换器的无功测量  

Reactive Power Measurement Based on Quasi-synchrony Algorithm and IIR Hilbert Transformer

作　　者：林国营 

机构地区：[1]广东省电力科学研究院,广州510600

出　　处：《电测与仪表》2009年第2期32-34,38,共4页Electrical Measurement & Instrumentation

摘　　要：非正弦电路的无功测量是当前电力测量研究的热点。在给定定义下,为了准确测量全无功电能,本文介绍了一种结合准同步算法和离散Hilbert的无功测量方法。解决了传统移相方法无法测量谐波无功的问题,同时,由于采用了准同步算法,其目标精度可以适应较宽的电网频率波动。仿真结果表明,此方法具有相当于同步采样法的测量精度。基于准同步算法和IIR-Hilbert变换器的无功测量方法,具有硬件成本低、测量精度高和易于实现等特点,适用于多功能电能表装置。Reactive power measurement of non-sinusoidal circuit is the hot-spot research in Electric Power System. For accurate t of reactive power in non-sinusoidal circuit, this article introduces a method integrating quasi-synchronous sampling theory with digital-phase-shift network. The method not only solves the problem of traditional idea, but also achieves high accuracy while wide frequency fluctuation with quasi-synchronous algorithm. The simulation shows that we can approximate the accuracy of ideal synchronous sampling condition with this new method. The design method for reactive power measurement using quasi-synchronous algorithm and IIR-Hilbert Transformer can be applied on Multi-Function Power Meter with low hardware cost, high accuracy and easy implementation.

关 键 词：非正弦电路 无功功率 准同步算法 IIR-Hilbert变换器 

分 类 号：TM933.37[电气工程—电力电子与电力传动]