基于改进稀疏表示法的谐波源定位  

Improved Sparse Representation-Based Location of Harmonic Sources in Power System

作　　者：杨源[1] 林圣[1] 臧天磊[1] 何正友[1] 张钧[2] 黄文[1] 

机构地区：[1]西南交通大学电气工程学院,四川省成都市610031 [2]国网能源研究院,北京市西城区100052

出　　处：《电网技术》2013年第5期1279-1284,共6页Power System Technology

基　　金：国家自然科学基金项目(50877068;51207130);中央高校基本科研业务费专项资金项目(SWJTU11ZT07)~~

摘　　要：针对谐波源随机分布及非谐波源节点存在干扰电流的状况,提出基于改进稀疏表示法的谐波源定位。通过稀疏表示将最小二乘建立的谐波状态估计量测方程转化为线性优化问题,并对量测节点的选择进行调整,进而根据谐波注入电流估计结果判断谐波源的位置。在IEEE 123节点模型的基础上,将其与基于最小二乘法及稀疏表示法的谐波源定位进行对比。结果表明,所提出的方法具有定位准确、抗干扰能力强的优点。In allusion to random distribution and existence of interference currents at non-harmonic source nodes, an improved sparse representation-based method to locate harmonic sources is proposed. Using sparse representation, the measurement equation for harmonic state estimation established by least square method （LSM） is tumed into linear optimization problem and the selection of measuring nodes is adjusted, and then the positions of harmonic sources are judged according to estimation results of injected harmonic currents. Utilizing IEEE 123-bus system, the results of harmonic sources location obtained by the proposed method, the LSM-based method and the sparse representation-based method are compared. Comparison results show that the proposed method possesses the advantages of high positioning accuracy and strong ability of counter-interference.

关 键 词：谐波源定位 稀疏表示 最小二乘 量测配置优化 

分 类 号：TM711[电气工程—电力系统及自动化]