基于LS-SVM的谐波源定位及谐波源注入电流分解方法

Method of Localization Based on LS-SVM and Injected Currents Decomposability for Harmonic Sources

为了能够有效检测出电力系统中存在的多谐波源,通过谐波敏感因子确定谐波监测点的数量及分布,利用基于最小二乘支持向量机(LS-SVM)的谐波源定位估计器判断嫌疑母线的范围,在给定的范围中,通过求解网络状态方程进一步确定谐波源母线位置,并准确计算出谐波源注入的谐波电流大小。仿真结果表明,这种先定性缩小嫌疑母线范围,再定量确定谐波源母线位置以及注入谐波电流大小的方法对于配电网中多谐波源的检测是有效的。

A simple and efficient estimation approach for the multi-harmonic source detection in power system is proposed. This approach determines the number and locations of harmonic meters according to the harmonic sensitive factor for every bus. An estimator based on least squares support vector machines takes the data from these meters to estimate the suspicious buses ranges where the exact locations of harmonic sources can be determined by network equation. The simulations show that the approach based on calculating harmonic currents with pre-reducing ranges of suspicious buses is efficient to detecting multiharmonic sources.