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基于改进型因果时序网络的微电网故障诊断方法

Study on fault diagnosis method of microgrid based on improved temporal cause-effect network
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摘要 目前微电网多采用简单的过电流保护,因所处运行状态不同其故障电流变化范围大且电流衰减快速,致使故障诊断准确度降低。由于信号传递和继保设备误动失灵等原因,故障诊断系统会接收到错误的警报信息,这会降低微电网故障诊断的准确度,因此,提出一种基于改进型因果时序网络的微电网故障诊断方法来解决这一问题。通过微电网线路保护与断路器间的时序逻辑关系,辨别微电网故障警报信息的正误,对微电网进行故障诊断确定故障过程。通过仿真模型和设定案例结果可知,改进型因果时序网络故障诊断方法可以提高微电网的故障诊断准确度,该方法适应微电网孤岛及并网两种状态。 At present,the microgrid adopts simple overcurrent protection,the operating state is different,the fault current varies widely and the current attenuates rapidly,so that the fault diagnosis accuracy is reduced.The uncertainties including the information distortion,malfunction and miss operation,have effects on fault diagnosis of the grid.These effects may leads to wrong conclusions given by the fault diagnosis system.The fault diagnosis method of microgrid is proposed based on improvedtemporal casual-effect network.Via the characteristic of temporal logic relation between protection system and equipment,the obtained alarm information is initially distinguished and then the faults are diagnosed.By analyzing and testing,the proposed method can make accurate fault diagnosis,and deal with the changes of topology configuration of the grid as well.
作者 杨帆 张琰骏 Yang Fan;Zhang Yanjun(Northeast Petroleum University,Daqing 163318,China)
出处 《国外电子测量技术》 2019年第4期28-33,共6页 Foreign Electronic Measurement Technology
关键词 微电网 故障诊断 改进型因果时序网络 过电流保护 microgrid fault diagnosis improved temporal casual-effect network overcurrent protection
作者简介 杨帆,硕士研究生,研究方向为电力系统及其自动化。E-mail:940421207@qq.com;张琰骏,硕士研究生,研究方向为电力系统及其自动化。E-mail:476025644@qq.com.
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