Research of Transient Components Line-Detection Leakage Protection Based on Wavelet Analysis In Mine
The methods of a novel underground line-detection leakage protection based on the processing of transient component with wavelet packet were summarized by analyzing the relations between the parameters and electrical fault characteristics of underground distribution networks. By analyzing the transient process of leakage fault happened to underground distribution networks in mine, the expression of residual voltage and residual instantaneous current was given. And by extracting transient component of leakage fault using wavelet transform, combining the characteristic of steady and transient states, the rational startup-value for underground line-detection leakage protection were given. The fault moment can be located precisely by singularity principle of wavelet, apply wavelet packet transform to sampled transient component, calculate the line-detection criterion composed by wavelet packet coefficients, and confirm the leakage faulty line by the line-detection criterion. Through different leakage fault simulation and EMTP emulator experiments, the results show that the new protection method is feasible and the novel line-detection leakage protection has great advantage in high sensitivity and accuracy.
transient component leakage protection Wavelet Analysis fault detection
WANG Taihua GUO Yu CUI Lizhi ZHU Yifeng
School of Electrical Engineering & Automation, Henan Polytechnic University, Jiaozuo 454100, Henan, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
947-951
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）