基于正交匹配追踪算法的谐波源定位方法  

Harmonic source localization method based on orthogonal matching pursuit algorithm

作　　者：张旭[1] 徐永海[1] 秦本双 刘子腾 Zhang Xu;Xu Yonghai;Qin Benshuang;Liu Ziteng(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《电测与仪表》2021年第4期44-51,共8页Electrical Measurement & Instrumentation

基　　金：国网山西省电力公司科技项目(52053018000Z)。

摘　　要：为了在系统非全局可观时,仍能对节点注入谐波电流进行估算,对电网中的谐波源进行有效定位,文章提出了一种基于正交匹配追踪算法的谐波源定位方法。提出方法根据已知量测量和量测矩阵,基于压缩感知理论中的正交匹配追踪算法对欠定的系统谐波状态方程进行求解,估算了节点注入谐波电流,实现了系统一定程度非全局可观时的谐波源有效定位。通过与其他方法的仿真对比分析,验证了在改变谐波源数目和位置以及考虑测量误差时,提出方法具有更好的定位效果,说明了提出方法具有较高的适用性和抗干扰能力。In order to estimate the harmonic current injected into the nodes and locate the harmonic source effectively when the system is not globally observable,a harmonic source localization method based on orthogonal matching pursuit algorithm is proposed in this paper.Based on the known measurements and measurement matrices and the orthogonal matching pursuit algorithm in the compressed sensing theory,the undetermined system harmonic state equation is solved,and the harmonic current injected into the nodes is estimated,and the effective location of the harmonic source is realized when the system is not globally observable to a certain extent.It is verified that the proposed method has better positioning effect when changing the number and position of harmonic sources and considering measurement errors through simulation and comparison with other methods.It shows that the proposed method has higher applicability and anti-interference ability.

关 键 词：谐波源定位 压缩感知 正交匹配追踪算法 谐波状态估计 

分 类 号：TM73[电气工程—电力系统及自动化]