Reliability index design method and system based on power distribution planning

The invention discloses a reliability index design method and system based on power distribution planning. The method comprises the steps that a line is divided into a plurality of sections through an outlet circuit breaker, a section circuit breaker and a tail rod; determining the position of the interconnection switch in each section and the number of the interconnection switches in the section, and counting the total number of the interconnection switches after the section; related reliability indexes are calculated; according to the invention, the method for calculating the number of interconnection switches after segmentation is combined with the method for segmenting the line, and the calculated theoretical reliability is more accurate, so that according to the line topology, the line before planning and the line after planning are compared after theoretical reliability calculation, and the reliability of the line before planning and the reliability of the line after planning are improved. Whether the t