Synchronous generator static excitation control method and system

Abstract

Embodiments of the invention disclose a synchronous generator excitation system control method and system. The control method comprises the steps of setting a selective switch, a competition module and a summation module on a control main loop of the synchronous generator excitation system; obtaining the type of an additional input signal input to the control main loop of the synchronous generator excitation system; controlling the additional input signal to be input to a corresponding superposition point through the selective switch according to the type of the additional input signal; and determining the superposition mode of the additional input signal according to the competition module and the summation module corresponding to the selective switch. The type of the additional signal input to the control main loop of the synchronous generator excitation system is judged, and then the additional signal is controlled to select the proper superposition point and superposition mode according to the type of the additional signal, so that it is ensured that the output additional signals do not conflict when two or more than two additional control modules are in output in the excitation system, thereby further avoiding the problem of unit power oscillation.

Description

technical field [0001] The present application relates to the field of synchronous generator excitation system control, in particular to a synchronous generator static excitation control method and system. Background technique [0002] During the grid-connected process of the power system, the electrical power of the synchronous generator running in the grid will frequently appear due to the conflict between the output of the excitation system under-excitation limiting module and the output of the power system stabilizer module on the main loop of the excitation control due to the superposition mode. This will lead to forced oscillation of unit power, which will affect the safe and stable operation of the power grid system. [0003] The current mainstream synchronous generator excitation control output signal of the underexcitation limiting module, the output signal of the power system stabilizer, and the output signal of the overexcitation limiting module are mainly superim...

AI Technical Summary

Problems solved by technology

[0005] This application provides a static excitation control method and system for a synchronous generator to solve the problem of power oscillation of the grid-connected unit when two or more additional control modules have outputs in the excitation system of the prior art

Images