基于ICEEMDAN的矿井供电系统单相接地故障选线方法

Line Selection Method for Single-phase Grounding Fault of Mine Power Supply System Based on ICEEMDAN

目前矿井供电系统在发生单相接地故障时,常发生无法识别故障线路、易受环境干扰的问题。因此提出了基于改进的自适应噪声完全集合经验模态分解(ICEEMDAN)算法的选线新方法,应用于矿井供电系统发生单相接地故障的情况。采用ICEEMDAN分解系统中馈线的暂态零序电流信号,提取固有模态分量,计算能量熵值作为各馈线判断故障的特征值,比较各馈线能量值完成选线。采用MATLAB/Simulink建立仿真实验平台,仿真结果验证了该方法的优越性和可靠性。

At present, when the single-phase grounding fault occurs in the mine power supply system,it often happens that the fault line cannot be identified and is vulnerable to environmental interference.Therefore, proposed a new line selection method based on improved complete ensemble empirical mode decomposition with adaptive noise(ICEEMDAN) algorithm, which is applied to the mine power supply system when the single-phase grounding fault occurs. Uses ICEEMDAN to decompose the transient zero-sequence current signals of feeders in the system, extracts the inherent modal components,calculates the energy entropy value as the characteristic value for judging faults of each feeder, and compares the energy values of each feeder to complete line selection. The simulation platform was built by MATLAB/Simulink, the simulation results verified the superiority and reliability of this method.