Insulator hydrophobic surface local salt density measuring device and measuring method

Abstract

The invention discloses an insulator hydrophobic surface local salt density measuring device and a measuring method. The insulator hydrophobic surface local salt density measuring device comprises a water storage tank used for storing deionized water, a water route control module used for controlling deionized water flow rate, a measuring prove used for measuring insulator upper and lower surface local salt density, a circuit control module used for measuring soiling solution resistance value, a selector switch, and a local salt density measuring conversion module used for converting soiling solution resistance value into local coated salt density. The insulator hydrophobic surface local salt density measuring device is of a pincerlike structure; the measuring probe is composed of a pair of parallel electrodes, wherein an external electrode is fixed, and an internal electrode is adjustable, complete contact with composite insulator surfaces and upper and lower surface switching can be realized, direct storing of insulator surface local salt density values can be realized, and measuring stability and accuracy can be improved.

Description

technical field [0001] The invention belongs to the field of high-voltage external insulation, in particular to a device and a method for measuring local salt density on the hydrophobic surface of an insulator. Background technique [0002] Due to the uneven distribution of energy and load centers in my country, with the development of the economy, it is urgent to realize large-scale energy transmission. For this reason, my country's power grid has built or planned to build many ultra-high voltage or ultra-high voltage transmission lines. Composite insulators and room temperature vulcanized silicone rubber coatings are widely used in high-voltage transmission lines due to their good anti-pollution flashover capabilities. However, with the increase of operating time, these hydrophobic insulating surfaces will accumulate a lot of pollution. In severe weather such as rain, drizzle, etc., insulator flashover accidents will also be caused, resulting in interruption of power supp...

AI Technical Summary

Problems solved by technology

This measurement method is complicated to operate and the steps are cumbersome, and after each measurement, the dirt on the insulating surface is cleaned, and it is impossible to continuously measure the change of pollution accumulation on the insulating surface over a period of time

[0004] At present, in order to simplify the measurement steps of the equivalent salt-covered density on the insulating surface, a salt density measurement method proposed by the State Grid and China Electric Power Research Institute, the method sprays water on the dirty part of the insulator surface through a water spray device, and the detection probe Immerse in sewage to obtain the conductivity and calculate the salt density value; this method reduces the measurement steps of the equivalent salt covering density to a certain extent, but this measurement method cannot complete the measurement of the equivalent covering salt density when the insulating surface is hydrophobic , and it is impossible to continuously measure the change law of pollution accumulation on the insulating surface over a period of time

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