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Method and system for detecting electrical fault of brushless exciter and storage medium

A technology for electrical faults and exciters, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems that affect the accuracy of fault criteria and introduce inherent harmonics, so as to improve sensitivity and reliability, and have great application prospects Effect

Active Publication Date: 2020-06-19
TSINGHUA UNIV
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Problems solved by technology

The disadvantage of this method is that the stator excitation current is usually rectified by the AC power supply, which will introduce inherent harmonics during operation; and the stator excitation current will be affected by the automatic voltage regulator, and these factors will affect the accuracy of the fault criterion

Method used

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  • Method and system for detecting electrical fault of brushless exciter and storage medium
  • Method and system for detecting electrical fault of brushless exciter and storage medium
  • Method and system for detecting electrical fault of brushless exciter and storage medium

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Embodiment Construction

[0040] In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described here. Based on the embodiments of the present invention described in the present invention, all other embodiments obtained by those skilled in the art without creative effort shall fall within the protection scope of the present invention.

[0041] Fault detection based on detection coils can avoid being affected by the above factors, and the sensitivity and reliability of fault detection are higher. Therefore, the present invention proposes a detection coil-based fault detection metho...

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Abstract

The embodiment of the invention provides a method and a system for detecting an electrical fault of a brushless exciter and a storage medium. The method comprises the following steps: winding a sub-detection coil on each of at least two uniformly distributed magnetic poles of the brushless exciter; connecting the at least two wound sub-detection coils in series to obtain a series-connected magnetic pole detection coil, wherein a port of the magnetic pole detection coil is kept in an open-circuit state; detecting the port voltage of the magnetic pole detection coil; and determining whether thebrushless exciter has an electrical fault based on the harmonic component of the port voltage. According to the method and the system for detecting the electrical fault of the brushless exciter and the storage medium, the sensitivity and reliability of fault protection and monitoring of a multi-phase annular winding brushless excitation system can be effectively improved, and the method and the system have great application prospects in the aspect of fault detection.

Description

technical field [0001] The invention relates to the technical field of relay protection and on-line monitoring of main equipment in a power system, and more specifically relates to a method, system and storage medium for detecting electrical faults of a brushless exciter. Background technique [0002] Multi-phase annular winding brushless excitation system has been widely used in large nuclear power units, and is an important part of the nuclear power generation system. The safe and stable operation of the brushless excitation system is crucial to the entire power generation system. However, the current brushless excitation system only adopts the "weak protection" configuration. Electrical faults such as short circuit between turns of the excitation winding, internal short circuit of the armature winding, open circuit of the rotating rectifier diode and disconnection of the armature that may occur in the brushless exciter will all affect the brushless exciter. The safe opera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
CPCG01R31/343G01R31/346
Inventor 孙宇光杜威桂林赵广睿
Owner TSINGHUA UNIV
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