Abstract：When short-circuit fault occurs in a power system,fault resistance frequently existed,and the value of the fault resistance is random due to many factors.In order to effectively monitor voltage sags in the whole network,the variable of fault resistance should be added into optimal model.In the proposed method,matrix of critical fault resistance is established based on the parameters of power network and short circuit calculation,then optimal placement model considering randomness of fault resistances can be built.The constraint in the improved model is the observability rate of voltage sags,and the objective is to minimize the number of monitors placed in the whole network.Based on the optimal model,genetic algorithm is applied to obtain the best placement scheme.The proposed method has been applied to the IEEE 30-bus test system,simulation results show that,voltage sags caused by short-circuits resistances can be effectively monitored based on the improved method.Compared with traditional method,the proposed method can be more applicable in practical engineering.
陈礼频, 杜新伟 ,汪 伟 ,曹开江, 任志超. 考虑故障电阻随机不确定性的电压暂降监测点优化配置[J]. 电工技术学报, 2016, 31(23): 93-99.
Chen Lipin, Du Xinwei Wang ,Wei Cao ,Kaijiang, Ren Zhichao. Optimal Voltage Sag Monitors Placement Considering Randomness of Fault Resistance. Transactions of China Electrotechnical Society, 2016, 31(23): 93-99.
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2016, Vol. 31 
