Research On Application Of Power Flow Entropy Theory In Skeleton Network Reconfiguration

Because of the complexity of the electric power system,the blackout fault cannot fundamentally avoided.This requires electricity network after the blackout,to quickly restart the power supply unit,restore power system framework,to fully restore power supply.Therefore,network reconfiguration strategy of power system blackouts after all study is of great significance.Network reconfiguration strategy research mostly with the quickness of refactoring as main objective,fast recovery skeleton network power supply.And trend,derived from thermodynamics entropy as an introduction to the power grid of the concept of "entropy",can through the description of tidal current in the power system disorder to quantitative description of power system reliability.First of all,the paper reconstructed the trend of entropy calculation process,and the trend of the entropy theory for reliability analysis.At the same time,for reconstruction after the power system reliability,this paper puts forward a kind of trend in entropy as the recovery index of the skeleton network reconfiguration strategies.With the index as the objective function to refactor strategy can effectively guarantee the network reliability,in order to prevent the reconstruction in the early by the system vulnerability bring serious consequences such as power cut again.Then,in order to get satisfy solution to refactor system after the trend of minimum entropy,this paper adopts the discrete particle swarm optimization algorithm to complete the reconstruction scheme selection.For scale-free topology connectivity and power system,in this paper,the improved discrete particle swarm optimization algorithm.In addition,based on various parameters have physical meaning of this algorithm,at the same time adjust the values of the parameters in the algorithm program,the output of the algorithm can meet different solutions to refactor under the condition of screening.To program the algorithm implementation,in order to make sure strictly meet the trend of the entropy minimum skeleton can be obtained by network reconfiguration scheme.Further,from two aspects of static and dynamic reliability of reconstruction scheme reliability is studied.And discussed from the Angle of load recovery rate reconstruction scheme is practical.For reconstruction scheme,the reliability of the power system and load balance between recovery quickness,whether can both have further consideration,to work compared to previous scholars,this paper carries on the quantitative analysis and comparison.Research has shown that the presented framework network reconfiguration scheme to meet the reliability of power system at the same time,has certain reconstruction efficiency advantages.