摘要
运用小波分析处理各相故障电流波形,并求各相电流的小波奇异熵的算法,与设定的阈值比较大小以判定是否为故障.在Matlab/Simulink下建立了一个电力系统模型,分别考虑了合闸时刻、过渡电阻、接地距离、振荡频率、噪声等多种因素后,做了大量仿真分析.得出了该算法鲁棒性好,具有干扰因素影响的特点.
A novel algorithm is presented based on wavelet singularity entropy to analyze the current wave after fault occurring.Then each phase current wave is computed.A simulation model is built and simulated in MATLAB/SIMULINK environment.Besides,interference factors such as inception time,ground resistance,fault location,slip frequency and noise are also discussed comprehensively.It is concluded that the algorithm is immune to interference factors and the proposed scheme is robust.
引文
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