Island division method for power distribution network containing distributed power supplies

Abstract

The invention belongs to the technical field of power grid operation safety, and relates to an island division method for a power distribution network comprising distributed power supplies. The methodcomprises the following steps of: collecting the parameters of the power distribution network; formulating a load weight; calculating a line weight according to line impedance; describing the radialoperation structure of the power distribution network by adopting a tree structure, converting the power distribution network into a weighted directed tree, and obtaining the incidence matrix of the connection relationship of the power distribution network; checking active supply and demand constraints before solving the load transmission loss of the whole network; establishing an optimal load reduction strategy; traversing all the distributed power supplies and loads, and calculating the power transmission cost of distributed power supply-load pairs; establishing an island division function by taking the minimization of power transmission cost as an objective; comparing islands containing the distributed power supplies; and formulating an optimal load flow calculation function. With the method adopted, the applicability of actual operation is improved, an island scheme is optimized and adjusted, and the utilization rate of the distributed power supplies is maximized.

Description

technical field [0001] The invention belongs to the technical field of power grid operation safety, and more particularly relates to a method for dividing islands of a distribution network including distributed power sources. Background technique [0002] It has received more and more attention to meet the increasing load demand, optimize the energy structure, and improve the comprehensive utilization of energy through extensive access to distributed power. When the power shortage of the upper-level power grid causes insufficient regional power supply, bad weather conditions cause equipment failures in the power distribution system, and the upper-level power grid collapses, the power distribution area and the upper-level power grid can restore power to the load in the isolated island area through reasonable island division, improving power supply. Reliability while allowing sufficient time for troubleshooting. It is necessary to study how to optimize the island division of ...

AI Technical Summary

Problems solved by technology

[0003]Current island division methods usually use branch and bound, deep search and other methods, which need to formulate multiple auxiliary rules, resulting in a large amount of calculation, which cannot meet the needs of real-time operation, and limits Use scenarios, and do not consider the controllability of the load, do not perform secondary verification and optimization, meet the basic voltage constraints and power constraints, cannot ensure the best division method, and do not maximize the use of distributed power

Images