摘要
提出一种基于戴维南定理和补偿法的快速短路电流计算方法,算法中采用补偿法在故障端口引入补偿电流,以此来模拟节点短路故障对原网络的影响。该方法无需修改节点导纳矩阵,仍采用故障前的导纳矩阵来解算网络的状态,可达到求解整个网络的目的。与通用算法相比,既能计算各种类型的短路故障,又节省了求解故障后导纳矩阵的时间。计算结果表明,该算法计算速度快、精度高,能更好地满足短路电流的实时计算需要。
A fast algorithm for calculating short-circuit current based on Thevenin＇s theorem and compensation method is presented.With compensation method,compensation current is introduced in the algorithm into the fault ports for modeling the influence of node short-circuit faults on original network.It can solve the state variable of post-fault network by using nodal admittance matrix of pre-fault network without modification,then solution of the whole network is obtained.Compared with general algorithm,the algorithm proposed can not only compute various short-circuit faults,but also save time for solving post-fault admittance matrix.With faster computing speed and higher precision,the algorithm can better meet the demand of the real-time calculation of short-circuit current.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第14期103-106,共4页
Automation of Electric Power Systems
关键词
导纳模型
戴维南定理
补偿法
短路故障
故障计算
admittance model
Thevenin＇s theorem
compensation method
short circuit fault
fault calculation
