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This paper presents an on-line equivalent algorithm for power system based on phasor measurement unit. The method considers the changes of the system parameters and load level, which overcome parameters rift problem and the shortage of traditional two points power flow method that supposing the parameters are fixed after a small disturbance. On this basis, voltage stability and Alert margin are proposed,...
This paper takes into account the effect of the transfer of power grid operation mode during the study on reactive power optimization control. And it is proposed that a multi-objective reactive power optimization model including transformer stalls, constraints in the operation mode transfer process, the reactor and so on. The iterative algorithm of optimization and power flow calculation is used to...
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