基于电气量判据的输电网故障诊断

Fault Diagnosis of Transmission Network Based on Electrical Criterion

以复杂电网故障诊断为目标,分析在发生多重故障且伴随不确定性因素的情况下的故障诊断流程,考虑保护和断路器拒动、误动可能性和告警信息误报、漏报等不确定性因素,对保护规则、动作状态和告警信息三者之间的关系进行解析,实现了实际动作状态和告警信息关系的解耦,并提出一种利用PMU电气量信息的电气量新判据,对常规解析模型增加约束,实现了故障诊断信息的冗余,极大地降低了误诊的可能性。

Taking complex power network fault diagnosis as the target,this paper analyzed the process of fault diagnosis in the case of multiple faults and accompanied by uncertain factors,considering the protection and circuit breaker failure,the possibility of misoperation and false alarm information in the process of uploading the false alarm information.The relationship among protection rule,action state and alarm information was analyzed to realize decoupling between actual action state and alarm information.And a new criterion of electric variable was put forward using PMU electrical state information.The constraint was added to the conventional analytical model,and the redundancy of fault diagnosis information was realized,which greatly reduced the possibility of false diagnosis.