开关柜内部故障电弧探测法的研究现状及趋势

鉴于故障电弧是电力系统开关柜内部的灾难性故障之一,综合分析了国内外对故障电弧探测方法的研究及应用现状,在对现有各种故障电弧探测方法进行介绍和分析,指出各种探测方法的技术特点、局限性和适用范围的基础上,提出了故障电弧的早期预测预警探测方法及故障电弧探测算法智能化的发展趋势。通过研究和提取故障电弧放电前伴随的早期弧声、弧光的特征信息,实时在线监测该特征弧声、弧光是否存在即可断定故障电弧是否将会发生,从而改变了目前故障电弧的事后被动检测。可实现基于特征弧声、弧光的早期预测预警防护机制,把故障消除在发生早期,降低和避免了故障电弧产生时对开关设备造成的损失。

Current Research and Development Trends on Faults Arc Detection Method in Switch Cabinet

The present status of research and development of faults arc detection methods in switch cabinet were analyzed synthetically.By summarizing the advantages,limitations and applicable areas of each method presently used in switch cabinet,suggestions and comments are given for further research based on our research.The present techniques are based on detecting faults by examining the voltages and currents,and the changes in voltages and currents usually do not occur soon after the establishment of an arcing fault.The consequence is that the damage due to the fault is usually substantial.It is pointed out that the forecast and early warning of faults arc and intelligent detection algorithm are the trends of future study in this field.Studying on the feature exaction of early arc sound and arc light is an important premise of detecting the early faults arc,and it is feasible to forecast and early warm faults arc in switch cabinet by online detecting the feature of fault arc sound and/or fault arc light,which can change the traditional passive detection method to the active detection method based on the feature signals of early fault arc sound and fault arc light,and reduce the damage of switch apparatus by eliminating the arcing faults in the early time.