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Grounding test device and method for stators and rotors of power generators

A generator stator and rotor grounding technology, which is applied in the field of grounding test, can solve the problems of endangering the personal safety of test personnel, accidental stator grounding fault, etc., and achieve the effect of shortening the test time, improving the speed of the test, and improving the safety

Pending Publication Date: 2019-06-14
CHINA YANGTZE POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, a technical solution is urgently needed to solve the unexpected stator grounding fault that may occur during the above test, which will seriously endanger the personal safety of the test personnel.

Method used

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  • Grounding test device and method for stators and rotors of power generators
  • Grounding test device and method for stators and rotors of power generators
  • Grounding test device and method for stators and rotors of power generators

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Embodiment Construction

[0039] The preferred solution is figure 1 with figure 2 As shown, a generator stator rotor grounding test device and test method include a test line 1. One end of the test line 1 is connected to a test clamping device 2, and the other end of the test line 1 is connected to a first static contact 301. The static contact 3 is fixed on the top of the insulating box 4, and the top of the insulating box 4 is also provided with a second static contact 302. There is a certain safety distance between the first static contact 301 and the second static contact 302; different voltage levels The distance between the corresponding first static contact 301 and the second static contact 302 is different. When the voltage is 12kV, the distance between the first static contact 301 and the second static contact 302 can be 120mm;

[0040] The insulating box 4 is equipped with a remote control lifting device 5, which includes an electric lifting rod 504; the top of the electric lifting rod 504 is c...

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Abstract

The invention discloses a grounding test device and method for stators and rotors of power generators. The device comprises a test line; one end of the test line is connected with a test clamping device and the other end of the test line is connected with a first static contact; the static contact is fixed at the top of an insulation box; a second static contact is arranged at the top of the insulation box; a certain safe distance exists between the first static contact and the second static contact; a remote-control lifting device is arranged in the insulation box; the remote-control liftingdevice is used for driving safety bracket to move up and down, so as to realize conduction or disconnection between the first static contact and the second static contact; the second static contact isconnected with the input end of a remote-control resistance switching device; and the output end of the remote-control resistance switching device is used for being electrically connected with a grounding body. According to the device and method, the testers do not need to wear insulation gloves, hold insulation rods to carry out test, and complete all the tests through remote-control operationsat an enough safe distance, so that the safety of the whole test can be greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of grounding tests, and particularly relates to a generator stator rotor grounding test device and a test method. Background technique [0002] The stator grounding test in the conventional generator test project needs to be tested and verified by connecting test resistors of different resistance values ​​from the neutral point of the generator to the ground after the generator voltage rises to the rated voltage. [0003] The existing test methods are attached to the instructions image 3 As shown, after the generator is boosted, the tester wears insulating gloves, stands on the insulating mat, holds the insulating rod, and hangs the grounding test resistance test wire connected to the end of the insulating rod, and touches the neutral point of the generator for a short time. After observing and recording the test current or the resistance value measured by the relay protection, remove the insulating rod from the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 毛健罗红俊杜波陈虹周宽裕黄娟梅
Owner CHINA YANGTZE POWER
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