CN-122016940-A - Insulator pollution degree testing system and method

CN122016940ACN 122016940 ACN122016940 ACN 122016940ACN-122016940-A

Abstract

The application provides an insulator pollution degree testing system and method, wherein the system comprises a first control module, a pollution accumulation simulation module and a plurality of electrode measuring sensors, wherein each electrode measuring sensor is used for being deployed at different points on the surface of an insulator, the first control module is respectively connected with the pollution accumulation simulation module and each electrode measuring sensor, the first control module is used for controlling the pollution accumulation simulation module to simulate the pollution accumulation condition of the insulator, when the insulator is in the pollution accumulation condition, electric signals acquired by each electrode measuring sensor are acquired, the electric conductivity of different points on the surface of the insulator is determined according to the electric signals, the pollution degree test of different points on the surface of the insulator is completed according to the electric conductivity of different points on the surface of the insulator, and the measurement of different points on the surface of the insulator can be realized.

Inventors

YU JINGZHE
FAN SHUOCHAO
CHEN YUAN
HUANG XIAOLONG
LU YI
SU BIN
GAO YANFENG
WANG KANG
ZHANG XU
LIU MIN

Assignees

国网冀北电力有限公司
国网冀北电力有限公司电力科学研究院
国家电网有限公司

Dates

Publication Date: 20260512
Application Date: 20260120

Claims (11)

1. The insulator pollution degree testing system is characterized by comprising a first control module, a pollution accumulation simulation module and a plurality of electrode measuring sensors; Each electrode measuring sensor is used for being deployed at different points on the surface of the insulator; the first control module is respectively connected with the accumulated dirt simulation module and each electrode measuring sensor; The first control module is used for controlling the pollution accumulation simulation module to simulate the pollution accumulation condition of the insulator, acquiring electric signals acquired by each electrode measurement sensor when the insulator is in the pollution accumulation condition, determining the conductivities of different points on the surface of the insulator according to the electric signals, and completing the pollution degree test of different points under the pollution accumulation condition according to the conductivities of different points on the surface of the insulator.
2. The insulator contamination degree test system according to claim 1, wherein the contamination simulation module comprises an extreme contamination simulation module, an initial contamination simulation module and a general contamination simulation module; The extreme pollution accumulation simulation module comprises a controllable environment chamber, a humidity control device, a temperature regulating device and a wind speed regulating device, wherein the humidity control device, the temperature regulating device and the wind speed regulating device are arranged in the controllable environment chamber; The initial dirt accumulation simulation module comprises a dust dispersion chamber, an ultrasonic atomizer and a dust generator, wherein the ultrasonic atomizer and the dust generator are arranged in the dust dispersion chamber; The general pollution accumulation simulation module comprises an environment simulation cabin, a temperature and humidity combined regulation and control system and a wind speed simulation device, wherein the temperature and humidity combined regulation and control system and the wind speed simulation device are arranged in the environment simulation cabin, the dust dispersion chamber is also used for accommodating the insulator, and the general pollution accumulation simulation module is used for simulating pollution accumulation conditions of a daily operation environment.
3. The system for testing the pollution degree of the insulator according to claim 1, further comprising an alternating current medium-frequency high-voltage signal generating device; the alternating-current medium-frequency high-voltage signal generating device comprises a half-wave voltage doubling circuit and a singlechip; the first control module, the singlechip, the half-wave voltage doubling circuit and the electrode measuring sensor are sequentially connected.
4. The system for testing the contamination level of an insulator according to claim 1, further comprising a signal amplifier; The first control module is connected with each electrode measuring sensor through the signal amplifier.
5. The system for testing the contamination degree of an insulator according to claim 2, The wind speed simulation device comprises a second control module, a first variable frequency fan, a diversion system and a first wind speed sensor, wherein the first variable frequency fan, the diversion system and the first wind speed sensor are respectively connected with the second control module; The humidity control device comprises a third control module, an ultrasonic atomizer, a dehumidifier and a humidity sensor which are respectively connected with the third control module; the temperature regulating device comprises a fourth control module, a semiconductor refrigerating sheet and a heating wire which are respectively connected with the fourth control module; The wind speed adjusting device comprises a fifth control module, a second variable frequency fan, a guide plate, a second wind speed sensor and a frequency converter, wherein the second variable frequency fan, the guide plate, the second wind speed sensor and the frequency converter are respectively connected with the fifth control module; the second control module to the fifth control module are respectively connected with the first control module.
6. The system of claim 1, wherein each of the electrode measuring sensors comprises four needle electrodes, each needle electrode being connected to the first control module.
7. An insulator contamination degree testing method, which is characterized in that the method is implemented by using the insulator contamination degree testing system according to any one of claims 1 to 6, and comprises the following steps: Controlling the pollution accumulation simulation module to simulate the pollution accumulation condition of the insulator, and acquiring the electric signals acquired by each electrode measurement sensor when the insulator is in the pollution accumulation condition; According to the electric signals collected by each electrode measuring sensor, determining the conductivities of different points on the surface of the insulator; and according to the conductivities of different points on the surface of the insulator, finishing the pollution degree test of different points under the pollution accumulation condition.
8. The method of claim 7, wherein determining the electrical conductivity of different points on the surface of the insulator based on the electrical signals collected by each of the electrode measurement sensors comprises: the electrical conductivity of the location of the insulator surface where the electrode measurement sensor is deployed is determined from the four-pole method and the electrical signals acquired by each of the electrode measurement sensors.
9. The method for testing the contamination degree of an insulator according to claim 7, wherein the step of acquiring the electrical signals acquired by each of the electrode measurement sensors when the insulator is in the contamination condition comprises: the insulator is arranged in an environment simulation cabin, a temperature and humidity combined regulation system and a wind speed simulation device in a general pollution accumulation simulation module are controlled to simulate pollution accumulation conditions of a daily operation environment, and electric signals acquired by the electrode measurement sensors are acquired; Correspondingly, the completion of the pollution degree test of different points under the pollution accumulation condition comprises the completion of the pollution degree test of different points under the pollution accumulation condition of the daily operation environment.
10. The method for testing the contamination degree of an insulator according to claim 7, wherein the step of acquiring the electrical signals acquired by each of the electrode measurement sensors when the insulator is in the contamination condition comprises: The insulator is arranged in the dust dispersing cavity, and an ultrasonic atomizer and a dust generator in the initial pollution accumulation simulation module are utilized to simulate pollution accumulation conditions of an initial exposure environment, so that electric signals acquired by the electrode measuring sensors are acquired; Correspondingly, the completion of the pollution degree test of different points under the pollution accumulation condition comprises the completion of the pollution degree test of different points under the pollution accumulation condition of the initial exposure environment.
11. The method for testing the contamination degree of an insulator according to claim 7, wherein the step of acquiring the electrical signals acquired by each of the electrode measurement sensors when the insulator is in the contamination condition comprises: Arranging the insulator in a controllable environment chamber, and simulating pollution accumulation conditions of an extreme environment by using a humidity control device, a temperature regulating device and a wind speed regulating device in an extreme pollution accumulation simulation module to acquire electric signals acquired by each electrode measuring sensor; Correspondingly, the completion of the pollution degree test of different points under the pollution accumulation condition comprises the completion of the pollution degree test of different points under the pollution accumulation condition of the extreme environment.

Description

Insulator pollution degree testing system and method Technical Field The application relates to the technical field of insulator testing, in particular to a system and a method for testing the pollution degree of an insulator. Background In an electric power transmission system, a transmission line is a critical channel for power transmission, and an insulator plays a critical role therein. During long-term operation of the transmission line, the surface of the insulator may accumulate contaminant substances. The presence of these fouling materials can negatively impact the performance of the insulator, accelerating its aging and damage. Therefore, the method has great significance for testing the pollution degree of the insulator. At present, the test of the pollution degree of the insulator generally adopts a mode of measuring the average equivalent salt density (ESDD) and ash density (NSDD) of the whole piece of the insulator. The method can not catch the dirt accumulation difference of different parts (such as the edge of the umbrella skirt, the vicinity of the iron cap and the concave-convex part of the porcelain piece) on the surface of the insulator, so that the influence of extremely uneven dirt accumulation on the outer insulation performance of the insulator is difficult to evaluate. For example, the conventional method obtains an average value through complicated processes such as cleaning, collecting filth, filtering and drying, and the like, and ignores risk points of local high-filth areas. This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section. Disclosure of Invention Aiming at least one problem in the prior art, the application provides a system and a method for testing the pollution degree of an insulator, which can realize measurement of different points on the surface of the insulator. In order to solve the technical problems, the application provides the following technical scheme: In a first aspect, the application provides an insulator pollution degree testing system, which comprises a first control module, a pollution accumulation simulation module and a plurality of electrode measuring sensors; Each electrode measuring sensor is used for being deployed at different points on the surface of the insulator; the first control module is respectively connected with the accumulated dirt simulation module and each electrode measuring sensor; The first control module is used for controlling the pollution accumulation simulation module to simulate the pollution accumulation condition of the insulator, acquiring electric signals acquired by each electrode measurement sensor when the insulator is in the pollution accumulation condition, determining the conductivities of different points on the surface of the insulator according to the electric signals, and completing the pollution degree test of different points under the pollution accumulation condition according to the conductivities of different points on the surface of the insulator. In one embodiment, the fouling simulation module comprises an extreme fouling simulation module, an initial fouling simulation module and a general fouling simulation module; The extreme pollution accumulation simulation module comprises a controllable environment chamber, a humidity control device, a temperature regulating device and a wind speed regulating device, wherein the humidity control device, the temperature regulating device and the wind speed regulating device are arranged in the controllable environment chamber; The initial dirt accumulation simulation module comprises a dust dispersion chamber, an ultrasonic atomizer and a dust generator, wherein the ultrasonic atomizer and the dust generator are arranged in the dust dispersion chamber; The general pollution accumulation simulation module comprises an environment simulation cabin, a temperature and humidity combined regulation and control system and a wind speed simulation device, wherein the temperature and humidity combined regulation and control system and the wind speed simulation device are arranged in the environment simulation cabin, the dust dispersion chamber is also used for accommodating the insulator, and the general pollution accumulation simulation module is used for simulating pollution accumulation conditions of a daily operation environment. In one embodiment, the insulator pollution degree test system further comprises an alternating current medium-frequency high-voltage signal generating device; the alternating-current medium-frequency high-voltage signal generating device comprises a half-wave voltage doubling circuit and a singlechip; the first control module, the singlechip, the half-wave voltage doubling circuit and the electrode measuring sensor are sequentially connected. In one embodiment, the insulator contamination d