Realization method of excitation regulator stator over-current limitation

A stator overcurrent and excitation regulator technology, which is applied in the direction of synchronous generator control, electrical components, control systems, etc., can solve problems such as power oscillation of the unit, and achieve the effect of precise adjustment

Active Publication Date: 2016-11-23
CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH +1
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Problems solved by technology

[0006] In order to solve the problem that the stator overcurrent limiter of the excitation regulator malfunctions in some cases during the operation of the existing sync

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  • Realization method of excitation regulator stator over-current limitation
  • Realization method of excitation regulator stator over-current limitation

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Embodiment Construction

[0028] In order to make the technical means, creative features, goals and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0029] The gist of the present invention is that, through the analysis of the stator overcurrent limitation of the existing excitation regulator, it is found that during the operation of the existing synchronous generator, there is a malfunction of the stator overcurrent limiter of the excitation regulator in some cases, which causes the unit to For the problem of power oscillation, the present invention provides an implementation method for stator overcurrent limitation of an excitation regulator to solve the above problem.

[0030] see figure 1 , the realization method of the excitation regulator stator overcurrent limitation of the present invention, in the synchronous generator operation process, the stator heating constant Cf and the stator cooling ...

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Abstract

The present invention provides a realization method of excitation regulator stator over-current limitation. The objective of the invention is to solve the problem of power oscillation of a unit caused by the misoperation of an excitation regulator stator over-current limiter under some conditions in the operating process of a synchronous generator. The method includes the step that: in the operating process of the synchronous generator, the stator over-current limiter carries out integral calculation so as to obtain a stator heat-emission constant Cf and a stator cooling constant Cl, when the difference value of the stator heat-emission constant Cf and the stator cooling constant Cl is larger than a stator heat-emission time constant C, and the reactive component absolute value abs (Igq) of stator current is larger than reactive current starting threshold value Iqmin of the stator over-current limiter, the stator over-current limiter outputs stator over-current limiting signals. When the limiter adopting the method of the invention is compared with a traditional stator over-current limiter, the calculation data of the limiter are all reactive components, and therefore, adjustment is more accurate and more reliable.

Description

technical field [0001] The present invention relates to the technical field related to power system operation and safety, in particular, to a method for realizing overcurrent limitation of the stator of an excitation regulator. In some cases, the problem of unit power oscillation caused by malfunction is provided, and a method for realizing the overcurrent limitation of the stator of the excitation regulator is provided. Background technique [0002] In a modern power system, improving and maintaining the stability of synchronous generator operation is one of the main conditions to ensure the safe and economical operation of the power system. The contribution of synchronous generator operation to power system stability is mainly realized by adjusting the excitation system and the speed control system. In general, the excitation system plays a major role in the transient and static stability of the generator. Whether it is system voltage regulation, recovery after system fai...

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Application Information

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IPC IPC(8): H02P9/10
CPCH02P9/107H02P2103/20
Inventor 戴申华陈延云盛明珺赵耀陶煜张俊雄陈刚
Owner CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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