In order to reduce power loss and improve power flow calculation accuracy,a cross supply area closed loop power flow calculation method based on key PMU measurement is proposed.Under the action of high order harmonics,a harmonic model of main components of cross supply area closed loop is constructed by transformer model and power line model.The idea of standardized residual detection method is adopted to process the bad data of cross supply area closed loop.The residual com-ponent of bad data measurement is estimated through key PMU measurement,and the residual covariance matrix of cross sup-ply area closed loop bad data detection is defined by gain matrix to complete the detection of cross supply area closed loop bad data.Combined with the design of cross supply area closed loop power flow calculation process,the calculation of cross supply area closed loop power flow is realized.The results of an example show that the proposed method can control the power loss of each branch of power flow calculation within 0.04 kW,and improve the accuracy of power flow calculation by controlling the calculation error of node voltage within 0.004.
关键词
关键PMU量测/合环供电/潮流计算/谐波模型/智能配电网
Key words
key PMU measurement/closed loop power supply/power flow calculation/harmonic model/smart distribution network
维普
万方数据