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A temperature detection method and system based on the temperature field distribution of a high-voltage switchgear

A high-voltage switchgear and temperature distribution technology, applied in electrical radiation detectors and other directions, can solve problems such as affecting the temperature field distribution, secondary accidents in switchgear, difficult to test contact temperature, etc., and achieve accurate temperature defect judgment and high test accuracy. , to ensure accurate test results

Active Publication Date: 2020-09-01
成都工百利自动化设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing high-voltage switchgear temperature monitoring device has the following defects: contact temperature measurement affects the internal mechanical structure and electrical insulation of the original switchgear, and at the same time affects its temperature field distribution. Accidents, the loss outweighs the gain; non-contact infrared temperature measurement, due to the limitation of the installation position, it is generally difficult to test the accurate contact temperature

Method used

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  • A temperature detection method and system based on the temperature field distribution of a high-voltage switchgear
  • A temperature detection method and system based on the temperature field distribution of a high-voltage switchgear
  • A temperature detection method and system based on the temperature field distribution of a high-voltage switchgear

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Embodiment 1

[0044] This embodiment provides a temperature detection method based on the temperature field distribution of the high-voltage switchgear, such as figure 1 As shown, the temperature distribution of the outer surface of the high-voltage switchgear is detected by continuous or intermittent scanning of the far-sighted infrared detection method to monitor the temperature change in the corresponding area of ​​the high-voltage switchgear; the corresponding monitoring points are calculated by using the partial least squares regression method combined with the impact factors temperature value. Among them, the temperature values ​​of the monitoring points include the temperature of the instrument room of the switchgear, the temperature of the circuit breaker room, the temperature of the busbar room and the temperature of the cable room, and the temperature of key joints. The key points include bus bars, moving and static contacts, and cable joints; the influencing factors include Add l...

Embodiment 2

[0047] This embodiment provides a long-range infrared temperature detection system based on the temperature field distribution of the high-voltage switchgear that can realize the temperature detection method shown in Embodiment 1. It consists of an inspection mechanism, a long-range infrared detector, a load current sensor and a control system. It consists of four parts.

[0048] The inspection mechanism includes a cantilever, a pulley, and a sliding rod; the cantilever is installed at a moderate position on the wall or top of the substation distribution room, and a slide rail is provided on the cantilever. The pulley and the slide rail are slidingly adapted, and the pulley slides along the slide rail. One end of the slide bar is fixed with a vision infrared detector, and the other end is connected with a pulley; the pulley moves along the slide rail, and the slide bar and the vision infrared detector are sequentially driven synchronously to scan and detect the outer surface of...

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Abstract

The invention discloses a temperature detection method based on temperature field distribution of a high-voltage switch cabinet. Temperature distribution of the outer surface of a high-voltage switchcabinet is detected in a non-contact manner to monitor the temperature change of a corresponding area in the high-voltage switch cabinet; and on the basis of a partial least squares regression method,a temperature value of a corresponding monitoring point is calculated by combining an influence factor. According to the invention, because of the non-contact temperature measurement, the internal structure of an original switch cabinet is not affected and the temperature field distribution is not affected; and the contact temperature is accurately calculated through the partial least squares regression method according to the principle of switch cabinet temperature field distribution, so that the accurate testing is guaranteed. Besides, a temperature detection system provided by the invention has an automatic inspection function and only one set of temperature detection system needs to be installed in one power distribution room, so that the installation and operation cost is low, the economical and practical effects are realized, and the safety and reliability are high.

Description

technical field [0001] The invention relates to the technical field of power system state monitoring, in particular to a temperature detection method and system based on the temperature field distribution of a high-voltage switch cabinet. Background technique [0002] High-voltage switchgear is the most widely used high-voltage switchgear in power grid operation, and its existence guarantees the personal safety of maintenance personnel. During the long-term operation, the internal contacts and contacts of the high-voltage switchgear are prone to material aging and poor contact, which leads to a sudden increase in the contact resistance of the contact position and a rise in temperature. When the temperature of the heat source continues to rise, phenomena such as oxidation, expansion, and contraction will gradually appear. If the heat source of the equipment is allowed to continue to deteriorate, it will eventually lead to equipment failure, severe power outages, and endanger ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/10
CPCG01J5/10
Inventor 黄华林马继春袁大友黄婷婷吕鹏
Owner 成都工百利自动化设备有限公司
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