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Measuring method and device for insulator surface equivalent salt deposit density

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, accurate measurement results, and prevention of pollution flashover accidents.

Active Publication Date: 2017-05-31
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

[0015] A method for measuring equivalent salt density on the surface of an insulator is provided in this specific embodiment, comprising the following steps:

[0016] 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.

[0017] 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

The invention discloses a measuring method and device for insulator surface equivalent salt deposit density. The method comprises steps as follows: S1, a pulse laser source is focused on the dirty surface of a to-be-detected insulator, the laser source emits laser with the pulse width smaller than or equal to 20 ns to induce dirty substances on the surface of the insulator to form plasma, and spectrum information emitted by the plasma in an expansion cooling process is acquired; S2, a relation model between the density of ions in common soluble salt in dirt on the insulator surface and spectral features after laser excites to generate plasma is established; S3, spectral information acquired in S1 is input into the relation model in S2, and the ion composition of the dirt substances on the surface of the to-be-detected insulator and ion density of various ions are analyzed; S4, the equivalent salt deposit density of the dirt substances is calculated according to the ion density of various ions. With the adoption of the measuring method and device, sampling while power outage is not required, and online measurement of dirt components and the equivalent salt deposit density can be realized.

Description

[0001] 【Technical field】 [0002] The invention relates to a method and a device for measuring equivalent salt density on the surface of an insulator. [0003] 【Background technique】 [0004] 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. [0005] 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 ...

Claims

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Application Information

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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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