A Judgment Method of Power Oscillation Influenced by Primary Frequency Modulation

A technology of power oscillation and frequency, applied in the field of judging the influence of primary frequency modulation on power oscillation, can solve the problems of large parameters, oscillation, and inability to judge the oscillation of the unit online in real time, and achieve the effect of a simple method.

Active Publication Date: 2021-01-29
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Problems solved by technology

However, large parameters may also cause the primary frequency regulation to be unstable under certain working conditions and cause grid oscillation
[0003] The existing technical solutions mainly focus on reducing the negative damping that primary frequency regulation may provide, and cannot judge whether the unit oscillation is caused by the primary frequency regulation function online in real time

Method used

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  • A Judgment Method of Power Oscillation Influenced by Primary Frequency Modulation
  • A Judgment Method of Power Oscillation Influenced by Primary Frequency Modulation
  • A Judgment Method of Power Oscillation Influenced by Primary Frequency Modulation

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[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0022] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a method for judging that primary frequency modulation affects power oscillation, collecting accurate generator speed / frequency, governor command and power signal, and then calculating the maximum value, minimum value and deviation value in the first cycle, Then calculate the maximum, minimum and deviation values ​​in the second cycle. At the same time, by judging the deviation value in two cycles, etc., it is obtained whether the power oscillation caused by the primary frequency modulation occurs. The present invention can judge whether a frequency modulation causes power oscillation on-line in real time, so as to quickly prompt the operator of relevant problems and take measures in time.

Description

technical field [0001] The invention relates to the electrical field of power plants, in particular to a method for judging that primary frequency modulation affects power oscillation. Background technique [0002] Since the power grid has strict assessments on the primary frequency regulation of generator sets, power plants tend to set larger primary frequency regulation parameters to meet performance assessment requirements. However, a large parameter may also cause the primary frequency regulation to be unstable in some specific working conditions and cause grid oscillation. [0003] The existing technical solutions mainly focus on reducing the negative damping that the primary frequency regulation may provide, and cannot judge whether the unit oscillation is caused by the primary frequency regulation function online in real time. Contents of the invention [0004] In view of this, the purpose of the present invention is to propose a method for judging whether primary ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/24
Inventor 方日升徐振华江伟黄道姗吴丹岳黄霆陈峰陈志苏毅张慧瑜李可文林因王文勇陈涛杨为民程功
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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