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A static excitation control method and system for a synchronous generator

A technology of synchronous generator and excitation system, applied in the direction of controlling generator through magnetic field change, reducing/preventing power oscillation, etc., can solve problems such as power oscillation of grid-connected units, and achieve the effect of avoiding power oscillation

Active Publication Date: 2019-09-24
云南电力试验研究院(集团)有限公司
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  • Application Information

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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

Method used

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  • A static excitation control method and system for a synchronous generator
  • A static excitation control method and system for a synchronous generator
  • A static excitation control method and system for a synchronous generator

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Embodiment Construction

[0022] see figure 1 , which is a schematic flow chart of a synchronous generator excitation system control method provided by this application, as shown in figure 1 As shown, the method includes:

[0023] S101, setting a selection switch, a competition module and a summation module in the synchronous generator excitation system control main loop.

[0024] The summation module and the competition module are arranged in series in sequence, and the competition module includes a competition high gate module and a competition low gate module; a first selector switch and a second selector switch are set, and the first selector switch and the second selector switch The input end of the switch is used to access the additional input signal, the output end of the first selection switch is connected to the competition module and the summation module, and the output end of the second selection switch is connected to the summation module. Such as figure 2 It is a schematic diagram of a...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/14H02J3/24
Inventor 吴水军周鑫张敏何廷一陈晶杨杨万雄彪
Owner 云南电力试验研究院(集团)有限公司
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