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Detection method for insulator contaminant in power system

A technology of power system and detection method, applied in the direction of using microwave flaw detection, etc.

Inactive Publication Date: 2013-06-19
HBEPC MAINTENANCE BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is manual cleaning or water flushing, there is a common problem to be solved: how to determine the most appropriate cleaning or flushing cycle

Method used

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  • Detection method for insulator contaminant in power system
  • Detection method for insulator contaminant in power system
  • Detection method for insulator contaminant in power system

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Experimental program
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Embodiment Construction

[0013] The portable non-contact electrification detector consists of microwave radiometer, antenna and power supply.

[0014] 1) Microwave radiometer calibration:

[0015] The portable non-contact live detection device uses a high-precision microwave radiometer as the core device, which can measure the pollution level of insulators conveniently and quickly. To measure the distribution of pollution on the insulator, the insulation condition of the insulator can be detected based on the microwave radiation characteristics and the difference in the radiation characteristics of the pollution in the microwave band. The principle is that when there is dirt on the insulator, the emissivity will vary with the amount and nature of the pollution, resulting in a change in the output of the radiometer.

[0016] Calibration is one of the important steps in the absolute measurement of the microwave radiometer, and the calibration accuracy directly affects the measurement accuracy. Calibra...

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Abstract

The invention provides a detection method for insulator contaminants in a power system. According to the invention, the radiation brightness temperature of insulator contaminants is measured through a microwave radiometer, and the radiation brightness temperature characteristic is taken as a main parameter for measuring the contamination grade. The method provided in the invention makes use of the microwave radiometer to measure a target, inverses the radiation brightness temperature of the measured target according to different antenna temperatures of the measured target, and then judges the contamination degree of the insulator.

Description

technical field [0001] The invention relates to a method for detecting dirt on insulators in a power system, and relates to the field of power systems. Background technique [0002] At present, the high-voltage equipment belonging to the domestic power grid mostly adopts the measure of regular cleaning of pollution, including live or power-off cleaning, live or power-off water washing. However, whether it is manual cleaning or water flushing, there is a common problem to be solved: how to determine the most appropriate cleaning or flushing cycle. It involves not only maintenance costs, but more importantly, the safe and stable operation of the power grid. [0003] In high-voltage power systems, insulators are often affected by salt, mud, coal ash, SO 2 The insulation strength is reduced due to the influence of other substances such as pollution, and then pollution flashover occurs, causing power outages, which has become a difficult problem in the power system. If the deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/02
Inventor 徐志刚
Owner HBEPC MAINTENANCE BRANCH
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