故障电弧模拟测试系统及不确定因素的研究  

Research on fault arc simulation test system and its uncertain factors

作　　者：金闪 许志红[1] JIN Shan;XU Zhihong(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学电气工程与自动化学院,福建福州350108

出　　处：《电力自动化设备》2019年第1期205-210,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51277031);福建省科技厅产学合作项目(2016H6008)~~

摘　　要：针对低压系统故障电弧问题设计了一套故障电弧模拟测试系统,该系统含有上位机模块、下位机控制模块等,可以实现切割电缆、碳化路径及点接触3种类型故障电弧输出。同时,采用Logistic识别算法作为故障电弧保护电器检测的辅助判据。通过对系统中存在的不确定因素进行分析,选取切割电缆模块中的切割速度、电缆线径与电流幅值,以及点接触模块中的拉弧速度与接触面积作为主要影响因素进行研究。研究表明,在特定条件下电流零休时间会呈现趋势性变化,改变单一条件可使其变化1 ms左右。依据研究结果选取最合适的起弧条件,以提高故障电弧保护电器检测结果的准确性。Aiming at the problem of fault arc in low voltage system,a fault arc simulation test system is designed.The designed system consists of host computer module,slave computer control module and so on.Three kinds of fault arc,i.e.cable cutting arc,carbide path arc and point contact arc can be output by the system.Meanwhile,Logistic recognition algorithm is adopted as the auxiliary criterion for the detection of fault arc protection device.Through the analysis of uncertain factors existing in the system,cutting speed,cable diameter and current amplitude in cable cutting module are selected as the main influence factors to be studied as well as arcing speed and contact area in point contact module.The study shows that under certain conditions the zero current time presents a trend change,and the change of one single condition will make it vary about 1 ms.According to the study results,the most suitable arcing conditions can be selected to improve the accuracy of detection result of arc fault protection devices.

关 键 词：故障电弧 模拟测试系统 Logistic识别算法 零休时间 

分 类 号：TM501.2[电气工程—电器]