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Built-in ultrahigh frequency sensor of oil discharge valve and installation method

A technology of ultra-high frequency sensor and installation method, which is applied in the direction of measuring device casing and testing dielectric strength, etc., which can solve the problems of inability to detect transformers in time, low detection sensitivity of built-in sensors, slow response speed of oil chromatography, etc., and achieve detection sensitivity high effect

Pending Publication Date: 2022-07-15
上海格鲁布科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a built-in ultra-high frequency sensor and installation method for the oil discharge valve, which are used to solve the problems of low detection sensitivity of the built-in sensor and slow response speed of transformer fault oil chromatography.

Method used

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  • Built-in ultrahigh frequency sensor of oil discharge valve and installation method
  • Built-in ultrahigh frequency sensor of oil discharge valve and installation method

Examples

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Effect test

Embodiment 1

[0035] This embodiment provides a built-in UHF sensor for an oil drain valve, including: an operating assembly 1, a flange assembly 2 and a sensor probe 3 that are coaxially connected in sequence, and one end of the sensor probe 3 is arranged in the operating assembly 1, The other end passes through the flange assembly 2 and is arranged outside the flange assembly 2;

[0036] The operating assembly 1 includes: a cover plate 4 , a control casing 5 and a cable assembly 6 ;

[0037] One end of the sensor probe 3 is fixed in the operating assembly 1, and the other end extends through the flange assembly 2 to the outer end for insertion into the oil discharge valve. The flange assembly 2 and the operating assembly 1 are detachably connected, which is convenient for installation. Disassembly and cleaning.

[0038] In a further implementation of this embodiment, the flange assembly 2 includes: an annular flange 8, a sound scraper 9, a guide rod 7 and an anti-vibration washer 10; one...

Embodiment 2

[0047] This embodiment provides an installation method for a built-in UHF sensor in an oil drain valve. When a partial discharge occurs inside the power equipment, a UHF electromagnetic wave signal is excited to propagate in the transformer. The structure of the transformer is complex. Since the wavelength of the UHF electromagnetic wave is much smaller than the size of the fuel tank, the transformer box has the effect of refraction and reflection on the electromagnetic wave. Interference is not easy to enter the inside of the box. The propagation attenuation of electromagnetic waves in oil is very small, only 0.6dB / m. The wavelength of the UHF electromagnetic wave is between 25 cm and 60 cm, which is larger than the size of the gap between the windings, so the attenuation is small. :

[0048] S1: Check the oil discharge valve to ensure that the oil discharge valve is closed;

[0049] S2: Remove the original valve cover, loosen the nut, but do not remove it, so that it hang...

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Abstract

The invention discloses a built-in ultrahigh frequency sensor for an oil drain valve and an installation method, the built-in ultrahigh frequency sensor comprises an operation assembly, a flange assembly and a sensor probe which are coaxially connected in sequence, one end of the sensor probe is arranged in the operation assembly, and the other end of the sensor probe penetrates through the flange assembly; the operation assembly comprises a cover plate, a control shell, a cable assembly and a guide rod; the control shell is arranged on the cover plate, the cable assembly is arranged on the upper end face of the control shell, one end of the guide rod is coaxially arranged on the control shell, the other end of the guide rod is connected with the flange assembly, and a sensor probe is arranged in the guide rod. The built-in ultrahigh-frequency sensor of the oil drain valve is mounted on the oil drain valve, so that the discharge amplitude, energy and frequency of insulation defects in the transformer can be accurately detected at any time, continuous monitoring of ultrahigh-frequency signals is realized, sudden faults of the operating transformer are found in time, the defect of low reaction speed of oil chromatography is overcome, and the safety of the transformer is improved. The transformer does not need to quit operation, the detection sensitivity is high, and the influence of corona interference is avoided.

Description

technical field [0001] The invention relates to the technical field of partial discharge power equipment, in particular to a built-in ultra-high frequency sensor for an oil discharge valve and an installation method. Background technique [0002] As the power system develops in the direction of high-voltage and large-capacity, the voltage level and single capacity of power transformers are also increasing. Once an accident occurs, it will cause large-scale power outages, and even endanger the stable operation of the entire power system, resulting in huge economic losses. Statistics show that insulation failure is one of the important causes of transformer accidents, and partial discharge (partial discharge) is an important symptom of insulation deterioration and failure. [0003] According to the discharge characteristics of the power transformer, the UHF (Ultra High Frequency sensor) is installed through the oil discharge valve. The built-in UHF sensor in the oil discharge ...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R1/04
CPCG01R31/1227G01R1/0408
Inventor 赵洪义沈道义胡勇夏善德何成文
Owner 上海格鲁布科技有限公司