Method and device for measuring equivalent salt density on insulator surface

A technology of equivalent salt density and measurement method, applied in the direction of material excitation analysis, etc., can solve the problems affecting the reliability of power supply of the power grid, and achieve the effect of real-time monitoring of pollution status, prevention of pollution flashover accidents, and accurate measurement results.

Active Publication Date: 2018-01-16
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

This method requires power outage sampling, which affects the reliability of power grid power supply. Therefore, it is necessary to find a real-time online measurement method for pollution components

Method used

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Embodiment Construction

[0011] A method for measuring equivalent salt density on the surface of an insulator is provided in this specific embodiment, comprising the following steps:

[0012] Step 1: Focus the pulsed laser light source on the dirty surface of the insulator to be detected, and use the laser light source to emit a laser with a pulse width less than or equal to 20 ns to make the dirty material on the surface of the insulator gasified to form plasma, and collect the plasma expansion and cooling process Emitted spectral information.

[0013] In this step, a laser-induced breakdown spectroscopy (LIBS) platform can be built to excite plasma on the surface of the insulator. The remote LIBS platform of this embodiment includes three main parts: Q-switched nanosecond pulse laser, charge-coupled device (CCD), and spectrometer, as well as additional optical remote equipment such as beam expander and variable-distance optical fiber focusing system. Laser pulses with a pulse width less than or equ...

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Abstract

A measuring method and device for insulator surface equivalent salt deposit density. The measuring method comprises the following steps: S1, focusing a pulsed laser light source on a contaminated surface of an insulator to be detected, using the laser source to emit laser with a pulse width smaller than or equal to 20 ns to induce contamination substances on the surface of the insulator to form plasma, and acquiring spectral information emitted by the plasma in an expansion cooling process; S2, establishing a relation model between the density of ions in common soluble salts in contamination substances on the surface of the insulator and spectral features after the plasma is generated by means of excitation of the laser; S3, inputting the spectral information acquired in S1 into the relation model in S2, and performing analysis to obtain the ion composition of the contamination substances on the surface of the insulator to be detected and ion density of the ions; and S4, calculating the equivalent salt deposit density of the contamination substances according to the ion density of the ions. Without the need of sampling while power outage, the measuring method and device can implement online measurement of contamination components and the equivalent salt deposit density.

Description

【Technical field】 [0001] The invention relates to a method and a device for measuring equivalent salt density on the surface of an insulator. 【Background technique】 [0002] A good external insulation state of the transmission line is an important guarantee for the safe operation of the power system. After the silicone rubber materials represented by composite insulators (synthetic insulators), climbing skirts and room temperature vulcanized silicone rubber coatings (RTV coatings) were widely used in the field of external insulation of power systems, the pollution flashover resistance of external insulation equipment was significantly improved. [0003] In recent years, on the one hand, the problem of environmental pollution has become increasingly serious and complex; on the other hand, the voltage level of AC and DC transmission lines has continued to increase, resulting in many pollution flashover accidents on ultra-high voltage transmission lines. It can be seen that in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/63
CPCG01N21/63
Inventor 王希林洪骁王晗陈灿赵晨龙叶蔚安贾志东
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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