Fusing analysis method for high-voltage fuse of cable distribution network and related device

A distribution network and fusing technology, applied in the direction of fuse testing, etc., can solve the problems of lack of pertinence in the analysis process, unsatisfactory protection measures, etc., and achieve ideal results

Pending Publication Date: 2022-05-10
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0003] This application provides a fusing analysis method and related device for the high-voltage fuse of the cable distribution network, which is used to solve the lack of pertinence in the analysis process of the fusing cause of the high-voltage fuse of the existing cable distribution network, resulting in the effect of the protection measures taken. suboptimal technical issues

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  • Fusing analysis method for high-voltage fuse of cable distribution network and related device
  • Fusing analysis method for high-voltage fuse of cable distribution network and related device
  • Fusing analysis method for high-voltage fuse of cable distribution network and related device

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[0060] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0061] For ease of understanding, see figure 1 , an embodiment of a fusing analysis method for a high-voltage fuse of a cable distribution network provided by the present application, including:

[0062] Step 101 , when the high-voltage fuse is blown due to a fault in the distribution network, obtain fault cable information, switch bus equivalent information, PT c...

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Abstract

The invention discloses a fusing analysis method for a high-voltage fuse of a cable power distribution network and a related device, and the method comprises the steps: obtaining fault cable information, switch bus equivalent information, PT characteristics and fault protection action logic when the fault of the power distribution network causes the fusing of the high-voltage fuse; constructing a fusing simulation model based on fault cable information, switch bus equivalent information, PT characteristics and fault protection action logic; according to a preset factor parameter group and the fusing simulation model, calculating primary side current values of each level under different fault parameters, wherein the preset factor parameter group comprises PT characteristic parameters, load size, neutral point grounding resistance, cable characteristic parameters and fault positions; fusing influence analysis is carried out through the primary side current value and the preset factor parameter set, and a fusing analysis result is obtained. The technical problem that the fusing reason analysis process of the high-voltage fuse of the existing cable power distribution network lacks pertinence, so that the effect of the adopted protection measure is not ideal can be solved.

Description

technical field [0001] The present application relates to the technical field of distribution network emergency protection, in particular to a fusing analysis method and related devices for high-voltage fuses in cable distribution networks. Background technique [0002] PT (Electromagnetic Potential Transformer) is a high-voltage device that converts high-voltage electricity in the power grid into low-voltage, which is convenient for monitoring and measuring voltage. Its primary winding is directly connected in parallel with the primary circuit. The existing cable-based 20kV distribution network frequently has abnormal faults of PT high-voltage side fuse blown. The malfunction of the device and safety automatic device seriously endangers the safe and reliable operation of the distribution network. In order to carry out protection and improve system reliability, after the rated current of the PT fuse is increased, there are still many PT fuse blown accidents. The emerging 2...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/74
CPCG01R31/74
Inventor 刘超杨昆郭晓燕刘尧赵晓燕幸旭彬柏林蔡仲启
Owner GUANGDONG POWER GRID CO LTD
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