Study On Reliability Evaluation And Optimal Switching Device Of Distribution

Recent years, the size of power system has expanded gradually, and the customers demand for the distribution network reliability becoming higher. How to improve the weaknesses of the distribution network effectively, and give both considerations to reliability and economy, this paper studied the switching devices optimized configuration on it.This paper presents a method of switches optimizing, on the premise of ensuring Average Supply Available Index, to reach the lowest charge of integrated switches. According to the instillation information of switches, using the method of fault pervasion to get the reliable assessment for distribution network, and on this basis, set up a sample to achieve the minimum weighted sum function of charge of integrated switch and Average Supply Available Index, introduce the advanced PSO algorithm to get switch optimization. Calculation examples show that the PSO algorithm is simple and is able to converge much faster. Then, the utilization of variation ensures the diversity of the groups effectively, enhances whole search capability. By testing it in experience, obtained better economic profit and improved the reliability indexes significantly.Finally, the system of reliability evaluation and optimal switching device of distribution network has been developed in VC++6.0. This system has friendly interface, can deal with complex calculations of the distribution network, and helpful to the result analysis. It can be used to aid decision-support of the distribution network optimal planning.