计及电压暂降和保护性能的配网可靠性算法  

Arithmetic of Distribution Network Reliability Calculation in Consideration of Voltage Sags and Protective Relays

作　　者：张国华[1] 杨京燕[1] 张建华[1] 尹元[1] 刘自发[1] 

机构地区：[1]电力系统保护与动态安全监控教育部重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2009年第1期28-34,共7页Proceedings of the CSEE

基　　金：教育部博士学科点基金项目(20010079002);北京市教育委员会共建项目建设计划

摘　　要：提出一种计及电压暂降和保护性能的配电网可靠性算法。运用蒙特卡洛法模拟故障的各种信息;采用故障电流补偿法计算系统故障后各节点电压;根据系统故障后线路保护的动作性能确定各负荷节点的电压暂降持续时间,从而进一步判断敏感负荷是否停运;将故障点法与临界距离法相结合,提出一种计算电压暂降域的方法。最后比较了计及电压暂降和保护性能前后的配电网可靠性指标变化。该算法采用的模型是RBTS测试系统的第6母线,运用上述算法计算了它的暂降域和可靠性指标。The algorithm of the distribution network reliability calculation considering voltage sags and protective relays is proposed. The Monte Carlo method is used to simulate system fault information. The method of fault current compensation is used to calculate the voltage of each node after system fault. The voltage sag time duration of each node after fault is determined by the acting time of protective relays and then whether the sensitive loads are sailed or not can be determined. Furthermore, based on combining the methods of the fault location and the critical distance, a new method is proposed to determine the regions of voltage sags. In the end, the distribution network reliabilities considering voltage sags and protective relays or not are compared. The RBTS Bus 6 is used as the research example. Using the proposed algorithm, the fault regions and reliability indices taking into account voltage sags and protective relays are calculated.

关 键 词：电压暂降 配电网可靠性 保护动作 暂降域 蒙特卡洛法 

分 类 号：TM77[电气工程—电力系统及自动化]