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A subjective and objective integrated evaluation method for the operation status of oil-immersed capacitor bushing

A capacitor bushing and operating state technology, applied in capacitance measurement, measurement of electrical variables, dielectric performance measurement, etc., can solve the problem of ignoring the subjective information of decision makers, and achieve the effect of clear quantification, comprehensive evaluation factors, and strong practicability

Inactive Publication Date: 2021-08-27
国网山西省电力公司超高压变电分公司 +1
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Problems solved by technology

However, both the subjective and objective weighting methods have their limitations, and the subjective weighting method has its subjective arbitrariness; the objective weighting method often ignores the subjective information of the decision maker, especially in the case of casing operation status evaluation, which is more practical in engineering. field

Method used

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  • A subjective and objective integrated evaluation method for the operation status of oil-immersed capacitor bushing
  • A subjective and objective integrated evaluation method for the operation status of oil-immersed capacitor bushing
  • A subjective and objective integrated evaluation method for the operation status of oil-immersed capacitor bushing

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Embodiment Construction

[0059] 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. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0060] refer to figure 1 , is the system of operating parameters used in an embodiment of the method for detecting the operating state of an oil-immersed capacitor bushing provided by the present invention, specifically including the dielectric loss to the end screen, the capacitance change rate, and the insulation resistance of the end screen of the bushing to the ground , H in casing oil 2 G...

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Abstract

The invention belongs to the technical field of maintenance of the running state of power transmission and transformation equipment, and discloses a method for detecting the running state of an oil-immersed capacitor bushing, which includes calculating the relative degree of deterioration of the operating parameters of the oil-immersed capacitor bushing, and obtaining the operating parameters of the oil-immersed capacitor bushing. Relative degree of deterioration; operating parameters include the dielectric loss of the oil-immersed capacitor bushing to the ground end screen, the capacitance change rate, the insulation resistance of the bushing end screen to the ground, and the H in the casing oil. 2 、C 2 h 2 content and maintenance times; the first weight of each operating parameter is obtained by using the AHP; the second weight of each operating parameter is obtained by the entropy weight method; the first weight and the second weight are integrated by the cuckoo algorithm to obtain the final weight; According to the final weight, the relative deterioration degree of each operating parameter is integrated to obtain the evaluation value of the operating state of the oil-immersed capacitor bushing; the evaluation value obtained by this method is closer to the actual operating state of the oil-immersed capacitor bushing, and has comprehensive evaluation factors , quantitative clear and operable advantages.

Description

technical field [0001] The invention belongs to the technical field of maintenance of the running state of power transmission and transformation equipment, and in particular relates to a method for detecting the running state of an oil-immersed capacitor bushing. Background technique [0002] Power transformers connect windings of different voltage levels to the line through bushings, and use bushings of different voltage levels to insulate the transformer oil tank. The bushing is the current-carrying element of the power transformer, which not only insulates the ground, but also acts as a fixed lead. For the power transformer in operation, the running current will flow through the lead wire in the bushing. Therefore, once a short circuit occurs, the current will increase sharply and impact the bushing. In severe cases, the bushing will burst and cause serious accidents. Power transformer bushing is one of the components with high failure probability in power transformer ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R27/26G06N3/00
CPCG01R27/2605G01R27/2617G01R31/12G06N3/006
Inventor 李斐明臧春艳段星辉王建伟孙伟刘钧郭靖杜鹃赵延文
Owner 国网山西省电力公司超高压变电分公司
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