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GIL equipment fault positioning system and method based on transient ground potential rise measurement

A technology of transient ground potential and equipment failure, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, which can solve the problems of inconvenient and fast positioning, impracticality, and high time cost

Pending Publication Date: 2022-03-22
四川省菁蓉和欣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the GIL equipment is fully enclosed, it is inconvenient to quickly locate the fault location
Due to the long length of the GIL and the large number of gas chambers, it is impractical to directly use the conventional gas decomposition product detection method to locate the faulty gas chamber, which requires too much time and cost

Method used

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  • GIL equipment fault positioning system and method based on transient ground potential rise measurement
  • GIL equipment fault positioning system and method based on transient ground potential rise measurement
  • GIL equipment fault positioning system and method based on transient ground potential rise measurement

Examples

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no. 1 example

[0048] Please refer to figure 1 , the present embodiment provides a GIL equipment fault location system 100 based on transient ground potential rise measurement (hereinafter referred to as: system), the system includes a transient ground potential sensor 110, a monitoring terminal 120, an on-site power supply unit 130 and a host control system 140.

[0049] Wherein, the transient ground potential sensor 110 is installed on the flange 220 at the outlet end of the bushing 210 of the GIL device 200 using the principle of capacitive voltage division, and the high voltage end of the transient ground potential sensor 110 can be fixed with the bolt at the flange 220, The ground terminal of the transient ground potential sensor 110 is connected to the monitoring terminal 120 . The transient ground potential sensor 110 is used to collect the transient point position data of the measuring point to form a transient ground potential waveform. The maximum measurement voltage of the trans...

no. 2 example

[0063] see image 3 , the present embodiment provides a GIL equipment fault location method based on transient ground potential rise measurement (hereinafter referred to as: method), the method can be realized by the system provided in the first embodiment, and the method includes the following steps:

[0064] S1: Install the transient ground potential sensor 110 at the flange 220 at the outlet end of the bushing 210 of the GIL device 200 .

[0065] Specifically, the transient ground potential sensor 110 is installed on the flange 220 at the outlet end of the bushing 210 of the GIL device 200 using the principle of capacitive voltage division, and the high voltage end of the transient ground potential sensor 110 can be fixed to the bolt at the flange 220 , the ground terminal of the transient ground potential sensor 110 is connected to the monitoring terminal 120 .

[0066] S2: Use the transient ground potential sensor 110 to collect the transient point position data of the m...

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Abstract

The invention provides a GIL equipment fault positioning system and method based on transient ground potential rise measurement, and relates to the technical field of electrical equipment. The system comprises a transient ground potential sensor, a monitoring terminal, an on-site power supply unit and an upper control system, wherein the transient ground potential sensor is used for being mounted at a flange of a bushing outgoing line end part of the GIL equipment; the monitoring terminal is connected with the transient ground potential sensor; the on-site power supply unit is connected with the monitoring terminal and is used for taking power on site and supplying power to the monitoring terminal; and the upper control system is connected with the monitoring terminal. According to the system, the transient ground potential sensor is additionally arranged at the flange of the wire outlet end part of the sleeve of the GIL equipment, the upper control system acquires transient ground position data of a measuring point by using the transient ground potential sensor to form a transient ground potential waveform, and by combining the characteristic moment of the transient ground potential waveform, the fault point of the GIL equipment can be quickly and accurately positioned, and the installation is convenient.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a GIL equipment fault location system and method based on transient ground potential rise measurement. Background technique [0002] Gas-insulated transmission lines (GIL for short) is a high-voltage, high-current power transmission equipment insulated by high-pressure gas (such as SF6, SF6 mixed gas, etc.). It is widely used in power transmission occasions of hydropower stations and nuclear power stations. Compared with traditional overhead lines, GIL equipment has large transmission capacity, low unit loss, less environmental impact, high operational reliability, and less land occupation. [0003] During the on-site voltage withstand and operation of high-voltage GIL equipment, insulation breakdown failures are often caused due to production or installation process defects. Once the high-voltage GIL has insulation breakdown, it will block the transmission channel...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/08
CPCG01R31/1272G01R31/085
Inventor 丁登伟
Owner 四川省菁蓉和欣科技有限公司