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Power System Control Based on Voltage Risk

In this paper it is proposed a method of power system assessment and control based on power system voltage risk.This method is used to solve the power system static voltage security problem.Risk theory is introduced to power system and risk index is built to overcome the defects of traditional indices.Probability power flow(PPF) and cumulant method are used to analyze the random of system statuses such as bus voltage.The severity function is used to describe the impact of the voltage violation.Voltage risk is defined as the result of the probability of voltage violation multiplying the severity of voltage violation.It is an indicator for system voltage security.Optimal power flow(OPF) is used to optimize the outputs of the system active and reactive resources.The system voltage risk will be reduced and the system security.be increased.At last,the method is illustrated with a test system.The results show the effectiveness of the method.
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