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Electrical state detection system of ultra-extra-high-voltage wall feed-through sleeve

A wall bushing and state detection technology, which is applied in the field of power transmission and transformation, can solve the problems of limited application range, open circuit at the end screen of bushing, lagging bushing electrical performance changes, etc., and achieve high timeliness and safety. Effect

Active Publication Date: 2017-06-27
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is generally necessary to wait for power failure to sample; in addition, the composition change of oil and gas often lags behind the change of the electrical performance of the bushing, which leads to the timeliness of detection.
There is also a way to monitor bushing dielectric loss and capacitance changes by installing a current transformer on the grounding down conductor at the end screen of the bushing, but this method may cause the end screen of the bushing to open during operation. Applications are therefore limited in scope

Method used

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  • Electrical state detection system of ultra-extra-high-voltage wall feed-through sleeve
  • Electrical state detection system of ultra-extra-high-voltage wall feed-through sleeve
  • Electrical state detection system of ultra-extra-high-voltage wall feed-through sleeve

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0032] figure 2 It is a schematic diagram of the structure of the improved super (ultra) high voltage wall bushing, which is composed of two joints of bushing 1 (indoor part) and bushing 2 (outdoor part). The bushing 1 has a jacket 1-1, a high-voltage conductive rod 1-2, a capacitor layer 1-3, an end screen 1-4, an end screen grounding terminal 1-5, and a flange 1-6. The bushing 2 has a high-voltage jacket 2 with a jacket 2-1, a high-voltage conductive rod 2-2, a capacitor layer 2-3, an end screen 2-4, an end screen grounding terminal 2-5, and a flange 2-6. Sleeve 1 and sleeve 2 are sealed and docked through flanges 1-6 and 2-6, and the sleeve is fixed on the wall through flanges; conductive rods 1-2 and 2-2 pass through a copper cylin...

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Abstract

The invention discloses an electrical state detection system of an ultra-extra-high-voltage wall feed-through sleeve. A traditional wall feed-through sleeve is partially improved technically; a voltage and current detection circuit and a monitoring protection module are designed on the basis of the improved wall feed-through sleeve; the state of the wall feed-through sleeve is monitored and protected through detecting the voltage of an external connection capacitor and the current of an external connection current transformer; detection can be performed at any time, and the operation of the sleeve is not affected; and therefore, the detection system has high timeliness and safety.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation in electric power systems, in particular to an electrical state detection system for ultra-high voltage wall-piercing bushings. Background technique [0002] In EHV AC substations and HVDC converter stations, some equipment must be installed indoors to ensure a good operating environment, such as preventing external insulation failures caused by pollution, rain and fog. A typical case is: in the converter station of the DC transmission system, the converter valves are installed in the valve hall, and the converter valves need to be connected to the outdoor DC equipment through the high-voltage DC wall bushing. [0003] Due to the requirement of external insulation performance, the total length of ultra-(extra) high-voltage wall-piercing bushing exceeds the manufacturing process control level. Therefore, for ultra-(ultra-) high-voltage wall-piercing bushings, two-secti...

Claims

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Application Information

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IPC IPC(8): G01R19/10
CPCG01R19/10
Inventor 肖遥周红阳
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID