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Fault positioning system and method for GIL equipment connected with cable

A technology for equipment faults and cable connection, applied in fault locations, information technology support systems, and fault detection according to conductor types, etc., can solve problems such as the reduction of high-voltage cable wave impedance, achieve precise positioning, improve anti-interference ability, and improve The effect of processing efficiency

Pending Publication Date: 2022-03-11
STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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AI Technical Summary

Problems solved by technology

However, in some pipeline corridor scenarios, GIL equipment may also be connected to high-voltage cables, and the wave impedance of high-voltage cables will become smaller, and a significant transient process will occur at the joint between GIL and cables, especially at the grounding of the outer shielding layer of the cable terminal line, will generate significant transient current

Method used

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  • Fault positioning system and method for GIL equipment connected with cable
  • Fault positioning system and method for GIL equipment connected with cable
  • Fault positioning system and method for GIL equipment connected with cable

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Embodiment Construction

[0038] The application will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.

[0039] Such as figure 1 As shown, a fault location system for GIL equipment connected with cables of the present invention includes a transient current sensor, a monitoring terminal and an upper control module;

[0040] The transient current sensor and the monitoring terminal are respectively used for sensing and monitoring the transient current at the outer shielding ground wire of the cable terminal connected to the GIL equipment;

[0041] During specific implementation, the transient current sensor is installed at the outer shielding ground bar of the cable terminal connected to the GIL equipment, and performs transient current sensing based on the principle of high-frequency electromagnetic co...

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Abstract

The invention discloses a fault positioning system and method for GIL equipment connected with a cable, the system comprises a transient current sensor, a monitoring terminal and an upper control module, the transient current sensor and the monitoring terminal are respectively used for sensing and monitoring transient current at a shielding grounding wire outside a cable terminal connected with the GIL equipment; the upper control module is used for analyzing the transient current, extracting the characteristic moment of the waveform of the transient current, and combining the propagation speed of the electromagnetic wave in the GIL to position the internal insulation breakdown fault of the GIL equipment. According to the invention, rapid and accurate positioning of the high-voltage GIL equipment can be realized, the installation is convenient, the GIL fault repair time can be shortened, and the GIL fault processing efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment detection, and relates to a fault location system and method for GIL equipment connected with cables. Background technique [0002] Gas-insulated transmission lines (GIL for short) metal casing and conductor coaxial arrangement, is a high-voltage high-current power transmission equipment insulated by high-voltage gas such as SF6, SF6 mixed gas, in large hydropower stations, nuclear power stations It is widely used in power transmission occasions. [0003] The unit loss of GIL equipment is low, the transmission capacity is large, the operation reliability is high, and it is less affected by the environment and occupies less space. During the operation of high-voltage GIL equipment, insulation breakdown failures are often caused due to defects in production or installation processes. Once the high-voltage GIL has insulation breakdown, it will block the transmission channel and affect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/12
CPCG01R31/085G01R31/088G01R31/1254Y04S10/52
Inventor 茅雷胡新雨林亚阳陈晓建朱富云俞忠于建华周阳顾嘉毛艳芳周嘉陆春锋魏成昊
Owner STATE GRID JIANGSU ELECTRIC POWER CO LTD NANTONG POWER SUPPLY BRANCH
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