Day-ahead dynamic reactive power optimization method for active power distribution network

Abstract

The invention provides a day-ahead dynamic reactive power optimization method for an active power distribution network. The method comprises the following steps: acquiring the impedance of each branchand the load of each node of the power distribution network, the load change rate of each hour of the next day and the active power output of a distributed power supply; determining an objective function and constraint conditions of day-ahead dynamic reactive power optimization of the active power distribution network; normalizing the objective function and establishing a reactive power optimization satisfaction model through an analytic hierarchy process; and in the reactive power optimization process, carrying out reactive power optimization through a reactive power control equipment coordination method based on relaxation-clustering-adjustment. According to the invention, solving of a day-ahead dynamic reactive power optimization problem is converted into solving of an all-day static reactive power optimization problem twice, a mixed integer programming problem of strong time-space coupling is converted into a nonlinear programming problem only containing continuous variables, so that the solving difficulty of day-ahead dynamic reactive power optimization is greatly reduced, and a satisfactory reactive power optimization solution meeting actual engineering requirements can be obtained.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a dynamic reactive power optimization method for an active power distribution network. Background technique [0002] Reactive power optimization is one of the necessary adjustment methods to ensure the safe and economical operation of the power grid. Through reasonable scheduling of the reactive power output of each reactive power control device, the purpose of improving voltage quality and reducing network loss can be achieved. In recent years, with the continuous development of new energy technologies, a large number of distributed power sources are connected to the distribution network and participate in reactive power optimization. The participation of distributed power in reactive power optimization makes the reactive power adjustment methods of the power system more abundant, but it also brings new problems to reactive power optimization: on the one hand, the reactive...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a dynamic reactive power optimization method for the active distribution network. The reactive power output coordination problem of the power compensation device can obtain a satisfactory solution of reactive power optimization that meets the actual requirements of the project

Images