基于多因素相关度的下级谐波源查找技术  

The sub-harmonic source searching method based on multifactor relevancy

作　　者：黄雯[1] 曾江[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《电力系统保护与控制》2012年第19期85-89,共5页Power System Protection and Control

基　　金：国家自然科学基金项目(50807016;51177051);广东省自然科学基金(9151064101000049)~~

摘　　要：随着非线性负荷接入电网,谐波污染日益严重,谐波源定位出现困难,为此提出了两种谐波源快速查找技术。基于馈线负荷分类和负荷容量谐波源查找技术,根据不同负荷注入电流期望值与经验负荷特性,给出馈线谐波风险计算公式与行业谐波风险值,快速计算不同馈线的谐波风险。基于基波功率相关度谐波源查找技术使用协方差计算谐波功率与基波功率相关度,根据不同的相关度快速计算各条馈线的谐波风险值。在分析方法的同时,以港前站10kV实测馈线数据与以上两种方法所得计算结果进行对比,论证了两种谐波风险计算方法具有切实的工程可行性。With more connected non-linear loads and harmonic pollution in power grids, the location of harmonic source becomes more difficult, therefore, this paper proposes two technologies to find harmonic sources quickly. Based on classification of feeder loads and capacities of loads, the technologies put forward formulas to calculate the risk of feeder harmony and the risk values and get the harmonic risks of different feeders, depending on the expectations of the current and the experienced load characteristics of different loads. On the basis of power correlation of the fundamental wave, these technologies use covariance to obtain the correlation between the harmonic power and fundamental wave power, and then get the risk values of feeders according to different correlations. Besides analysis of the method, this paper compares the measured data of Gangqian substation with the one obtained by these two methods, which turns out that these two methods have real engineering feasibility.

关 键 词：谐波源 功率相联 负荷分类 负荷容量 

分 类 号：TM711[电气工程—电力系统及自动化]