重庆大学学报2017，Vol.40Issue(11)：47-55,9.DOI:10.11835/j.issn.1000-582X.2017.11.006
非线性负荷特性等值阻抗的获取方法
A method for obtaining equivalent impedance of nonlinear load characteristic
陈治道 1朱茜 2肖代波 1刘天慈 1李达炜3
作者信息
- 1. 国网湖北省电力公司随州供电公司,湖北随州441300
- 2. 国网四川省电力公司天府新区供电公司,成都610213
- 3. 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044
- 折叠
摘要
Abstract
With the development of power electronics technology,the proportion of nonlinear load in the power grid is increasing.It is easy for nonlinear load in the power system to produce harmonics which result in harmonic pollution,therefore,it is necessary to make an analysis for its characteristics.In this paper,a method to obtain the nonlinear load characteristic by obtaining the real-time equivalent impedance of the nonlinear load based on the high order differential equation and the signal fitting is proposed.With using improved matrix beam method to fit the port voltage and current signal and putting voltage and current signal into the high-order differential equation which is to constrain port voltage and current,the equivalent reactance parameters of the load can be obtained through mathematical transformation.The characteristics of the nonlinear load are obtained according to the change characteristics of the equivalent parameters of the load.Simulation results show that the method is feasible and the equivalent impedance parameters of the load can be obtained in real time so that the nonlinear load characteristics can be obtained.关键词
非线性负荷/谐波污染/信号拟合/参数辨识Key words
nonlinear load/harmonic pollution/signal fit/parameter identification分类
信息技术与安全科学引用本文复制引用
陈治道,朱茜,肖代波,刘天慈,李达炜..非线性负荷特性等值阻抗的获取方法[J].重庆大学学报,2017,40(11):47-55,9.
