单相混合谐波源参量分析及算法研究  

Parameter analysis and algorithm research of single-phase hybrid harmonic source

作　　者：熊德智 陈向群[1] 刘雪飞 陈奕蕾 吴志勇 黄瑞 

机构地区：[1]国网湖南省电力公司计量中心,湖南长沙410007 [2]武汉理工大学信息工程学院,湖北武汉430070 [3]国网黑龙江省电力有限公司技能培训中心牡丹江分部,黑龙江牡丹江157000

出　　处：《中国测试》2017年第10期97-101,共5页China Measurement & Test

基　　金：国网总部指南项目专项基金(5217AB170001);国家电网公司科技创新项目(5216AB160003)

摘　　要：为研究配电网中非线性单相负载混合谐波源的特性,提出单相混合谐波源重要参量的分析方法及计算方法。通过分析单相混合谐波源的电压电流特征,给出包含谐波、间谐波、次谐波成分的混合谐波源电压电流瞬时值、有效值的分解方法和计算方法。依据基础公式推导,提出电压电流总谐波失真的计算方法,提出混合谐波源瞬时功率、有功功率的分解方法和计算方法,得出总有功功率测量理论误差与时间的关系。利用该文提出的系列算法,对配电网中某一非线性负载谐波源测试数据进行仿真分析,结果表明:该系列算法能有效计算电压、电流总谐波失真偏差,能准确表征总有功功率测量理论误差与时间的关系,测量时间越大,由间谐波引起的误差越不显著。The analytical method and computing method of the important parameters of hybrid harmonic source is proposed to study the characteristics of nonlinear single-phase load hybrid harmonic source in distribution network. The method to decompose and calculate the instantaneous value and effective value of the voltage and current of the hybrid harmonic source that includes harmonics, interharmonics and subharmonic is proposed by analyzing the voltage and current characteristics of single-phase hybrid harmonic source. Deduced according to the basic formula, the algorithm to calculate total harmonies distortion of voltage and current and decomposition and calculation methods for instantaneous power and real power of hybrid harmonic source are proposed, so as to obtain the relation between theoretical measurement error of the total active power and time. Based on series algorithms proposed in the paper, the simulation analysis is carried out for test data of certain nonlinear load harmonic source in power The results show that the algorithm can effectively calculate the total deviation of voltage and current, and can correctly represent the relationship measurement error of the total active power and time. If the measuring time caused by harmonics will be less significant. distribution network. harmonic distortion between theoretical is longer, the error caused by harmonics will be less significant.

关 键 词：非线性 谐波源 失真 间谐波 非正弦波 

分 类 号：TM933.4[电气工程—电力电子与电力传动]