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Detection prevention system with function of preventing insulation breakdown of transformer, and monitoring method

A transformer and sensor technology, applied in the detection and prevention system and monitoring field to prevent the insulation breakdown of the transformer, can solve the problems of low ultrasonic detection sensitivity and inability to detect signals, so as to reduce technical requirements and difficulties, improve sensitivity, and seal well Effect

Inactive Publication Date: 2018-11-23
国网黑龙江省电力有限公司齐齐哈尔供电公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex internal structure of the transformer and the severe attenuation of the partial discharge ultrasonic signal by the transformer shell, the sensitivity of ultrasonic detection is very low, and sometimes the signal cannot be effectively detected on site

Method used

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  • Detection prevention system with function of preventing insulation breakdown of transformer, and monitoring method

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Experimental program
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Effect test

Embodiment 1

[0023] A detection and prevention system capable of preventing transformer insulation breakdown, comprising: a transformer 1, the transformer is respectively connected to an oil discharge valve 2 and a current sensor 3, the oil discharge valve is connected to a UHF sensor 4, and the The current sensor is connected to the core grounding wire 5, the UHF sensor and the current sensor are respectively connected to the outdoor terminal cabinet 6, and the outdoor terminal cabinet is connected to the optical fiber Ethernet transceiver 7.

Embodiment 2

[0025] According to the detection and prevention system for preventing transformer insulation breakdown described in embodiment 1, the optical fiber Ethernet transceiver is connected with other terminal signal cabinets 8, web server 9, data server 10 and user server 11 respectively, and the described The data server is respectively connected with the portable terminal server one 12 and the portable terminal server two 13 through wireless signals.

Embodiment 3

[0027] According to the detection and prevention system for preventing transformer insulation breakdown according to embodiment 1 or 2, the transformer, the oil drain valve, the sensor, the UHF sensor and the core ground wire For the spacer layer 14.

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PUM

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Abstract

The invention discloses a detection prevention system with a function of preventing the insulation breakdown of a transformer, and a monitoring method. A conventional pre-delivery test and the discharge quantity monitoring of the transformer before operation are mainly achieved through a pulse current method. However, there are many types of interference on a site, such as corona and other discharge interference, and the interference are difficult to filter, so the misjudgement rate of a system is caused to be higher. The system provided by the invention comprises a transformer (1) which is connected with an oil drain valve (2) and a current sensor (3). The oil drain valve (2) is connected with a UHF sensor (4), and the current sensor (3) is connected with an iron core grounding wire (5).The UHF sensor (4) and the current sensor are connected with an outdoor terminal cabinet (6), and the outdoor terminal cabinet (6) is connected with a fiber Ethernet transceiver (7). The system is used for the online detection system for the partial discharge of a transformer.

Description

Technical field: [0001] The invention relates to a detection and prevention system and monitoring method capable of preventing transformer insulation breakdown, capable of on-line monitoring of the insulation state of oil-immersed transformers and reactors, and capable of real-time testing of the trend of partial discharge during transformer operation , and combined with oil chromatographic parameters, core ground current, oil temperature and oil pressure parameters and routine off-line test data to comprehensively evaluate and diagnose the overall insulation status of the transformer. Through the online monitoring of partial discharge of transformers by this system, users can know the insulation conditions of transformers in real time, make judgments for timely maintenance, and prevent insulation breakdown accidents caused by sudden changes in insulation status. Background technique: [0002] Transformer is one of the important equipment in substation. Its insulation state ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227G01R31/1281
Inventor 孙杰孙毅李欣靳方明赵梓彤高宇倪丹崔悦董向阳李学忠王云鹏徐建宇李季涛
Owner 国网黑龙江省电力有限公司齐齐哈尔供电公司