Automatic voltage control method considering static security

Abstract

The invention relates to an automatic voltage control method considering static safety, which belongs to the technical field of power system operation and control. The method performs an automatic voltage control calculation in each control cycle according to the demand for automatic voltage control in power grid dispatching operation; At the beginning of each calculation, based on the serious fault ranking table obtained from the historical serious fault information database, the serious fault screening of this calculation is carried out, and the solution of the optimal power flow model is used as the base state of the power system. Iterate between the results and the solution of the optimal power flow model to obtain the current automatic voltage control command; then perform static safety analysis on the expected fault set CAll, and update the serious fault sorting table in the historical serious fault information database according to the obtained results. for the next calculation. The method improves the safety of the power system both in the normal operation state and in the expected fault state.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to an automatic voltage control method considering static safety. Background technique [0002] The Automatic Voltage Control (AVC) system is an important means to realize safe, economical and high-quality operation of the power grid. Reasonable distribution of power and voltage to improve voltage stability margin, reduce network loss, improve voltage qualification rate, etc. The main method to determine the coordinated control command is to solve the Optimal Power Flow (OPF) model, as shown in formula (1): [0003] min f(x 0 ,u 0 ) [0004] s.t.g 0 (x 0 ,u 0 )=0 [0005] (4) [0006] u ‾ ≤ u 0 ≤ u ‾ [0007] x ‾ ≤ x 0 ...

AI Technical Summary

Problems solved by technology

[0024] This typical automatic voltage control method considering static safety, due to the expected fault set C monitored by static safety analysis All The number of expected faults set in is often very large, which makes the mathematical model of model (5) huge in scale, and it is often difficult to solve it in the actual implementation of automatic voltage control, and it is basically impossible to solve it within the time required for online implementation; at the same time, due to its strict Post-failure safety constraints may make the optimization feasible region of model (5) empty, and there is no feasible solution. At this time, the available automatic voltage control command cannot be obtained

Therefore, this typical automatic voltage control method considering static safety is difficult to meet the requirements of online implementation of automatic voltage control.

Images