剖析非线性负荷的无功功率  

Analysis of reactive power of non-linear load

作　　者：周勇[1] 王文峰[1] 赵慧光[1] 秦晓军 

机构地区：[1]郑州大学电气工程学院,河南郑州450002 [2]新乡供电公司,河南新乡453002

出　　处：《继电器》2006年第10期85-88,共4页Relay

摘　　要：非线性负荷的无功功率是一个值得关注的问题,传统意义上的无功功率概念已不能全面地对其进行解释。为了能够准确地计算和理解非线性负荷的无功功率,该文采用傅立叶分析方法,导出了非线性负荷的无功功率的计算公式,并且分析了公式中每一项的物理意义,最后通过算例验证了公式的完整性。只要选取合适的采样频率,计算精度就能够满足要求。Reactive power of non-linear load is a tough problem to tackle, and the traditional reactive power concept cant explain it now. In order to calculate and understand the reactive power of non-linear load accurately, the calculation formula of the non-linear load reactive power is concluded by means of the Fourier analysis method. The physical meaning of every item in formulae is analysed. Finally, the integrity of the formula is proved through an example. So long as suitable sampling frequency and the suitable highest order harmonic are chosen, the precision will meet the demands.

关 键 词：非线性负荷 频域无功功率 畸变功率 无功功率 

分 类 号：TM714.3[电气工程—电力系统及自动化]