Integral indicators improvement (SAIFI) of power supply reliability in electric distribution systems based on reclosers placement optimization

摘要

Distribution systems are built in such a way that short circuits in any segment of line threaten to shut down the entire section to which many consumers can be connected at one time. The use of reclosers is one of the advanced techniques for increasing power supply reliability in electric distribution systems. Optimal location determination for their efficient use is needed, which is an NP-complete problem in general. SAIFI (system average interruption frequency index) is an integral indicator, which measures the average accumulated duration and frequency of sustained interruptions per customer. It was chosen to estimate power supply reliability. Genetic algorithm was used to find a recloser placement corresponding to the optimal value of SAIFI index. The proposed algorithm allows taking into account the availability of grid with either radial or ring topology as well as power supply from several power sources.