Active power distribution network four-end soft switching planning method based on reliability evaluation

Abstract

The invention discloses an active power distribution network four-end soft switch planning method based on reliability evaluation. The method comprises the following steps: establishing an active power distribution network four-end soft switch locating and sizing planning model by taking the minimum annual comprehensive cost of a power distribution network as a first objective function and taking access capacity constraint as a constraint condition; taking the minimum power distribution network normal operation total loss as a second objective function, and taking a power flow constraint, a node voltage constraint, a line current-carrying capacity constraint and a four-end soft switch operation constraint as constraint conditions to establish an active power distribution network four-end soft switch addressing and sizing normal operation optimization model, and solving to obtain the power distribution network normal operation loss; evaluating the reliability of the active power distribution network containing the four-end soft switch through a reliability evaluation algorithm to obtain the annual average power failure time of each load point in each scene and the annual average transfer power of the four-end soft switch; substituting the obtained data into the first objective function, and solving by using a particle swarm algorithm to obtain an optimal solution, so as to serve as a locating and sizing scheme of the four-end soft switch, thereby greatly improving the system reliability of the power distribution network.

Description

technical field [0001] The invention relates to the technical field of four-terminal soft switch site selection and fixed capacity planning, in particular to a four-terminal soft switch planning method for an active distribution network based on reliability evaluation. Background technique [0002] my country's distribution network generally adopts the power supply mode of "ring network design and open-loop operation". When a fault occurs during the power supply process, the continuous power supply problem of important users cannot be solved effectively and in time, which greatly reduces the power distribution. network system reliability. During the actual operation of the distribution network, many factors will lead to short-term power supply interruptions, which will affect the reliability of power supply. The main factors are power distribution equipment and distribution line failures, low automation level of equipment, and automation of accident handling. low, takes a lo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings in the prior art, provide a four-terminal soft switch planning method for active distribution network based on reliability evaluation, and solve the problem of limited improvement of distribution network reliability

Images