Rotor grounding detection device

A detection device and rotor grounding technology, applied in the measurement device, the measurement of electrical variables, and the measurement of resistance/reactance/impedance, etc., can solve problems such as the influence of the rotor running state and the safety of the generator rotor, so as to improve reliability and accurate detection. Effect

Inactive Publication Date: 2013-04-03
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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  • Abstract
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Problems solved by technology

[0003] Due to the limitation of the measurement principle, the traditional ground detection device has a strong coupling with the generator rotor. When the device itself fails, it will affect the safety of the generator rotor, and it will also be affected by the operating state of the rotor.

Method used

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Embodiment Construction

[0017] In order to make the present invention more comprehensible, a preferred embodiment is described in detail below with accompanying drawings.

[0018] figure 1 It is a schematic diagram of a rotor grounding detection device provided by the present invention. The rotor grounding detection device includes a carbon brush contact detection module and an insulation resistance detection module, and the alarm module is connected to the carbon brush contact detection module and the insulation resistance detection module. The insulation resistance detection module is connected to the CPU through the insulation resistance recording module, and the CPU is also connected to the carbon brush contact detection module, the alarm module and the man-machine interface.

[0019] combine figure 2 , a rotor grounding detection device provided by the present invention injects current by superimposing a DC voltage on the negative pole of the excitation circuit to the ground, and detects that ...

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Abstract

The invention provides rotor grounding detection device which is characterized by comprising a carbon brush contact detection module and an insulating resistance detection module, wherein an alarm module is connected with the carbon brush contact detection module and the insulating resistance detection module, the insulating resistance detection module is connected with a central processing unit (CPU) through an insulating resistance recording module, and the CPU is further connected with the carbon brush contact detection module, the alarm module and a man-machine interface. The rotor grounding detection device overcomes the shortcomings in the prior art, keeps weak coupling with a rotor without any mutual influence, is accurate in rotor insulating resistance detection and improves reliability of system operation.

Description

technical field [0001] The invention relates to a generator rotor winding grounding detection device, which belongs to the technical field of generator parameter measurement. Background technique [0002] The ground fault of the rotor of the generator is a major hazard to the generator. The rotor ground detection device provides the detection function of the rotor winding insulation resistance, which can send an alarm signal when the resistance of the rotor winding drops to a certain level, thus ensuring that the rotor is properly repaired before the rotor ground fault occurs. processing to improve the reliability of the system operation. [0003] Due to the limitation of the measurement principle, the traditional ground detection device has a strong coupling with the generator rotor. When the device itself fails, it will affect the safety of the generator rotor, and it will also be affected by the operating state of the rotor. Contents of the invention [0004] The techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/14
Inventor 石书华王磊蔡迈柳毅赵正宇刘明行
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD
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