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High-voltage alternating-current line open-circuit fault identification method and device and equipment and storage medium

An open circuit fault, high voltage AC technology, applied in fault location, fault detection by conductor type, information technology support system, etc., can solve problems such as low accuracy, improve safety, ensure normal work, improve accuracy and effectiveness sexual effect

Active Publication Date: 2020-03-24
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the traditional fault monitoring methods for high-voltage transmission lines are less accurate

Method used

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  • High-voltage alternating-current line open-circuit fault identification method and device and equipment and storage medium
  • High-voltage alternating-current line open-circuit fault identification method and device and equipment and storage medium
  • High-voltage alternating-current line open-circuit fault identification method and device and equipment and storage medium

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Embodiment Construction

[0052] In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and not used to limit the application.

[0053] The method for identifying the open circuit fault of the high-voltage AC line provided in this application can be applied to figure 1 The high-voltage AC line structure shown in the system. In this system, the high-voltage AC line can be a three-phase line. Sending end AC system equivalent power supply 1, first bus 2, a-phase line first relay protection device 3, a-phase line 4, a-phase line second relay protection device 5, b-phase line first relay protection device 6. The first line b-phase line 7, the b-phase line second relay protection device 8, the c-phase line first relay protection device 9, the ...

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Abstract

The invention relates to a high-voltage alternating-current line open-circuit fault identification method and device, equipment and a storage medium. The method comprises the steps of determining a current calculation phasor of a line according to a voltage difference phasor of the line and access impedance of the line; determining a current difference value of each phase of line in the line according to the current calculation phasor and the current estimation phasor of the line; and according to the current difference value of each phase of line and the current setting value of each phase ofline, identifying a line disconnection fault of each phase of line in the line. By adopting the method, the current measured current data of the high-voltage alternating-current line and the intrinsic parameters of the line can be combined to identify the line fault of each phase of line in the line timely and accurately; the method improves the accuracy and effectiveness of fault recognition, facilitates the timely maintenance of a line with an open circuit fault, greatly guarantees the normal operation of a high-voltage AC line, greatly improves the safety of the line, and greatly reduces the probability of accidents.

Description

Technical field [0001] This application relates to the field of high-voltage power transmission technology, and in particular to a method, device, equipment and storage medium for identifying a high-voltage AC line open circuit fault. Background technique [0002] The electricity needed in people's daily life and work depends on the power grid deployed and controlled nationwide for transmission. At present, high-voltage power grids in cities in my country usually use overhead lines as a means of power transmission. However, when the overhead lines are exposed in the wilderness, when encountering lightning strikes or external damage, circuit failures may occur, affecting the normal operation of transmission lines, and even causing some problems. Causes of personal accidents. [0003] At present, for the fault monitoring of high-voltage transmission lines, the method of judging whether there is zero-sequence current at both ends of the transmission line is used to identify whether th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 卢正飞刘子俊胡子珩黄福全张安龙
Owner SHENZHEN POWER SUPPLY BUREAU
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