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Brushless exciter armature winding short circuit and diode open-phase fault identification method

A technology of open-phase fault and winding short-circuit, which is applied in the field of power system, can solve the problems of serious consequences of armature winding faults, and achieve the effect of avoiding shutdown of the excitation system, improving unit safety, and improving reliability

Pending Publication Date: 2022-05-06
FUJIAN NINGDE NUCLEAR POWER +7
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the consequences of armature winding faults are serious, and even if non-metallic faults occur, fast and reliable actions are required to stop the machine

Method used

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  • Brushless exciter armature winding short circuit and diode open-phase fault identification method
  • Brushless exciter armature winding short circuit and diode open-phase fault identification method
  • Brushless exciter armature winding short circuit and diode open-phase fault identification method

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Embodiment Construction

[0051] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0052] refer to figure 1 , figure 1 It is a schematic flowchart of an alternative embodiment of the identification method for armature winding short circuit and diode open phase fault of brushless exciter provided by the present invention.

[0053] Such as figure 1 As shown, the identification method of armature winding short circuit and diode open phase fault of the brushless exciter includes the following steps:

[0054] Step S101, acquiring the excitation current of the stator excitation winding of the brushless exciter.

[0055]Optionally, in the embodiment of the present invention, obtaining the excitation current of the stator excitation winding of the brushless exciter includes: sampling the excitation current...

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Abstract

The invention relates to a brushless exciter armature winding short circuit and diode open-phase fault identification method. The method comprises the following steps: obtaining excitation current of a stator excitation winding of a brushless exciter; pre-processing the excitation current to obtain a pre-processing current; and identifying an armature winding short-circuit fault and a diode open-phase fault of the brushless exciter according to the preprocessing current. The method can accurately identify whether the fault of the brushless exciter is an armature winding short-circuit fault or a diode open-phase fault, carries out corresponding control according to the identification result, can avoid serious consequences caused by misjudgment, improves the safety of a unit, avoids the shutdown of an excitation system caused by misjudgment, and effectively improves the reliability.

Description

technical field [0001] The invention relates to the technical field of electric power systems, and more specifically, relates to a method for identifying a short circuit of an armature winding of a brushless exciter and a phase failure of a diode. Background technique [0002] The excitation system is an important part of a large generator. An excitation system with excellent performance and high reliability is the basis for ensuring the safety of the generator and the stable operation of the power system. Compared with static excitation, the brushless excitation system eliminates the carbon brushes and slip rings of the generator, which significantly improves the reliability of the excitation system and is the first excitation method for large-capacity nuclear power units. The multi-phase brushless excitation system can not only reduce the requirement of high-power excitation system on the capacity of a single diode, but also improve the quality of rectified voltage and imp...

Claims

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Application Information

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IPC IPC(8): G01R31/08H02H7/085H02H7/09
CPCG01R31/08H02H7/0854H02H7/09
Inventor 宗卫晶王晓明胡亮樊兵团陈中余永栓屈天龙李文武邱波任仰凯段贤稳黄勇郭立雄魏利峰房志强陈吉胜徐文兵郝亮亮桂林王祥珩
Owner FUJIAN NINGDE NUCLEAR POWER
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