A Preventive Control Model of Overload Line Based on Cumulative Risk Assessment

摘要

This paper proposes a transmission line overload assessment model and optimization control method based on transmission line overload risk. It uses probabilistic power flow (PPF) and cumulative method to analyze the uncertainty of system statuses and line flow, applies the severity function to describe the impact of transmission line load fluctuations and its result. Based on that, as an indicator of power system security, overload risk index is defined as the product of the probability and the severity of transmission line overload. A preventive control model was used to optimize the outputs of the system active and reactive resources, which based on optimal power flow (OPF) and primal dual interior point method. It reduces the system overload risks and increases the system security. By test, calculation on the IEEE-16 test system validates the method proposed above.