基于自适应参数的VMD-SVM谐振接地系统故障选线方法

Adaptive Parameter-Based Fault Routing Method for VMD-SVM Resonant Grounding System

为解决谐振接地系统单相接地故障对故障初始角为零以及接地电阻为高阻的故障线路识别效果差的问题,提出一种自适应优化VMD参数(WOA-WOA)的选线方法。该方法通过Matlab/Simulink对小电流接地系统进行仿真,采集瞬时零序电流数据,将数据输入经优化参数后的VMD算法中进行信号分解,提取分解后的高频分量数据,将其输入进单一的支持向量机模型以及经鲸鱼算法优化后的支持向量机模型进行对比,结果表明VMD-WOA-SVM模型有着更好的选线准确度与选线效率。

In order to solve the problem of poor identification of single-phase ground faults in resonant grounding earth systems for fault lines with zero initial angle of the fault and high resistance to earth, an adaptive optimization of VMD parameters (WOA-WOA) is proposed as a wire selection method. The method simulates the small current grounding system through Matlab/Simulink, col-lects the instantaneous zero-sequence current data, inputs the data into the optimized VMD algo-rithm to decompose the signal, extracts the decomposed high-frequency component data, and in-puts them into a single support vector machine model and the optimized whale algorithm to com-pare the results. The results show that the VMD-WOA-SVM model has better line selection accuracy and efficiency.