摘要
为准确检测介质损耗角,提出基于改进ITD算法与最小二乘法的介质损耗角检测方法。首先构造协方差矩阵进行数据预处理,利用改进ITD法提取基波电压和电流分量的频率特性,然后采用最小二乘法获取基波电压、电流的相位信息,实现高精度检测介质损耗角。仿真实验结果表明了在介损角真实值、基波电压频率波动、3次谐波比例、直流分量比例、采样点数变化时该方法的可行性与有效性。
In order to accurately detect dielectric loss,this paper proposed the dielectric loss angle measurement based on the improved ITD algorithm and least square method. It is a method that firstly conforms covariance matrix as data preprocessing,then extracts the frequency characteristics of fundamental wave voltage and current component based on the improved ITD algorithm,and finally acquires their phase information by the least square method so as to realize the dielectric loss angle measurement with high accuracy. The simulation result shows that the method is feasible and effective when the true value of dielectric loss angle,frequency fluctuations of fundamental voltage,the three harmonic ratio,the DC component proportion,and sampling points change.
出处
《黑龙江电力》
CAS
2016年第3期209-213,共5页
Heilongjiang Electric Power
