摘要
传统电子式电流互感器谐波计量方法无法获取负荷参量特征,电流互感器谐波输出不稳定,导致该方法的计量性能不理想,电流互感器谐波干扰问题没有得到有效解决。因此,提出基于电力系统非线性负荷的电子式电流互感器谐波计量方法。构建电子式电流互感器谐波参数采集模型,融合电流互感器谐波振荡,提取自相关谱特征量。通过电阻元件敏感参数分析,实现对互感器非线性负荷参量的特征匹配,根据电力系统电子式电流互感器谐波输出稳态特征量,结合非线性特征序列重组和负荷均衡匹配的方法,实现电子式电流互感器谐波计量。仿真实验结果表明,采用所提电子式电流互感器谐波计量方法的准确性较高,谐波抑制能力更强,也提高了对电力系统的均衡配置和负载均衡调度能力。
The traditional harmonic measurement method of electronic current transformer can not obtain the characteristics of load parameters,and the harmonic output of current transformer is unstable,which leads to the unsatisfactory measurement performance of the method and the harmonic interference problem of current transformer has not been effectively solved. Therefore,the harmonic measurement method of electronic current transformer based on nonlinear load of power system is proposed. The harmonic parameter acquisition model of electronic current transformer is constructed, and the autocorrelation spectrum feature is extracted by fusing the harmonic oscillation of current transformer.Through the analysis of sensitive parameters of resistance elements,the characteristic matching of nonlinear load parameters of electronic current transformer is realized. According to the steady-state characteristic quantity of harmonic output of electronic current transformer in power system,combined with the method of nonlinear feature sequence reorganization and load balance matching,harmonic measurement of electronic current transformer is realized. The simulation results show that the proposed electronic current transformer harmonic measurement method has higher accuracy,stronger harmonic suppression ability,and also improves the power system balancing configuration and load balancing scheduling ability.
作者
万薇薇
WAN Weiwei(China Energy Investment Corporation Science and Technology Research Institute,Nanjing 210023,China)
出处
《电子设计工程》
2022年第6期156-160,共5页
Electronic Design Engineering
关键词
电力系统
非线性负荷
电子式电流
互感器
谐波计量
power system
nonlinearity load
electronic current
transformer
harmonic measurement
