【摘要】 针对含DG配电网区域保护中故障定位存在矩阵运算计算量大、耗时长等不足问题,提出了一种基于Petri网区域保护的故障定位新方法。在非故障时段,利用SCADA系统所汇集FTU的信息,在故障前更新网络拓扑,减小了定位耗时;当故障发生时,根据保护采集的故障信息,通过对PN模型中位置的不同定义,将故障定位问题转换为对锁定单一AFTU的Petri网求解问题,避免了不断修改矩阵参数;通过分层2次定位,减小了单次定位矩阵运算维度,进一步提高区域保护的速动性。通过详细的分析和仿真验证,结果表明:该方法有效提高了区域保护的通用性、简易性、快速性和准确性,具有高的实用价值。更多还原

【Abstract】 To solve problems such as large amount of calculations and long time consuming in the fault location of the protection of the regional distribution network containing DG,this paper proposes a new method of faults location based on Petri network. Under the proposed scheme,in the non-fault period,using the FTU information collected by the SCADA system,the network topology can be updated before the failure occurs to reduce the time for location. When a failure occurs,according to the fault information collected by the protection system and through different definitions to the locations in the PN model,the fault location is converted into solving problem to the locking single AFTU Petri net and the continuous modification to the parameter matrix is avoided. In addition,the single location matrix computing dimension is reduced through the two layered location to further improve the regional protection speed. This method effectively improves the generality,simplicity,rapidity and accuracy of regional protection,and has high practical value.更多还原