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Nuclear power station injection-type generator stator ground insulation resistance measurement precision adjusting method

A generator stator, grounding insulation technology, applied in the direction of high resistance measurement, measurement device, measurement of electrical variables, etc., can solve the problems of low accuracy and inaccurate insulation resistance measurement, and achieve improved accuracy and parameter configuration. And adjust the law, improve the effect of efficiency

Active Publication Date: 2019-10-22
LINGAO NUCLEAR POWER +5
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for adjusting the measurement accuracy of the stator grounding insulation resistance of a nuclear power plant injection generator, aiming to solve the problem of inaccurate or low precision measurement of insulation resistance in traditional technical solutions

Method used

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  • Nuclear power station injection-type generator stator ground insulation resistance measurement precision adjusting method
  • Nuclear power station injection-type generator stator ground insulation resistance measurement precision adjusting method
  • Nuclear power station injection-type generator stator ground insulation resistance measurement precision adjusting method

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] In the embodiment of the present invention, the measurement accuracy adjustment method of the injection generator stator ground protection is to abstract the mathematical model from the physical wiring of the generator stator ground protection, analyze and transform the mathematical model, and adjust the compensation parameters to realize The accuracy of the protective grounding resistance measurement is greatly improved; at the same time, the efficiency of the protective grounding resistance measurement is improved, making the parameter configuration and adjustment more regular during the me...

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Abstract

The present invention belongs to the technical field of nuclear power station generators and secondary systems, and especially relates to a nuclear power station injection-type generator stator groundinsulation resistance measurement precision adjusting method. The method comprises the following steps of: injecting a low-frequency signal source in an injection generator stator ground protection system, equivalently obtaining an equivalent circuit of the injection-type generator stator ground protection system according to the injection mode of the low-frequency signal source in the injection-type generator stator ground protection system and electrical parameters of related components in the injection-type generator stator ground protection system; performing modeling and calculation according to the equivalent circuit to obtain a relation of ground insulation resistance value measurement and precision adjusting thereof of the injection-type generator stator ground protection system;and according to the relation, adjusting the related parameters in the protection device so as to reduce the errors between a theoretical calculating value of the insulation resistance and the actually measured value of the insulation resistance by the protection device.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant generators and auxiliary systems thereof, and in particular relates to a method for adjusting measurement accuracy of stator grounding protection of injection type generators of nuclear power plants. Background technique [0002] The single-phase grounding of the stator winding of the generator is the most common fault of the generator, and it is the precursor of the phase-to-phase or inter-turn short circuit. The perfect stator single-phase grounding protection plays an important role in the safe operation of the generator. With the increase of generator capacity, due to the increase of stator winding capacitance to ground and the application of new cooling technology, the harm of stator winding ground fault is more serious, and the possibility of ground fault is further increased. Therefore, it is very necessary to install 100% stator grounding protection without dead zone for large ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/06G01R27/02
CPCG01R27/025H02H3/006H02H7/06
Inventor 屈天龙孙运兵白旭光白世杰
Owner LINGAO NUCLEAR POWER
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