WO2024021375A1 - Switch cabinet aging online monitoring method and system - Google Patents
Switch cabinet aging online monitoring method and system Download PDFInfo
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- WO2024021375A1 WO2024021375A1 PCT/CN2022/132730 CN2022132730W WO2024021375A1 WO 2024021375 A1 WO2024021375 A1 WO 2024021375A1 CN 2022132730 W CN2022132730 W CN 2022132730W WO 2024021375 A1 WO2024021375 A1 WO 2024021375A1
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 122
- 230000032683 aging Effects 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 152
- 229910052739 hydrogen Inorganic materials 0.000 claims description 30
- 239000001257 hydrogen Substances 0.000 claims description 30
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 14
- 238000000862 absorption spectrum Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000002431 foraging effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
Definitions
- This application relates to the technical field of electric power equipment, and specifically to an online monitoring method and system for switch cabinet aging.
- High-voltage switchgear is a kind of power equipment with a wide range of applications. It mainly plays the role of switching, control or protection in power generation, transmission, distribution, power conversion and consumption in the power system. High-voltage switchgear has been widely used in power supply systems due to its fully enclosed structure, good interchangeability, easy installation, perfect operating performance and misoperation prevention functions, and convenient maintenance and repair.
- the contamination on the surface of the insulating parts becomes a conductive or semi-conductive layer under the moisture of condensation.
- the leakage current on the surface increases, causing local overheating, which in turn causes Insulation aging accelerates, and insulation aging further causes leakage current to increase, thus creating a vicious cycle.
- the existing technology provides a method for online monitoring of the aging of switch cabinets based on sound and temperature.
- both sound and temperature can only be effectively monitored when severe discharge occurs.
- the monitoring time period is relatively late, making it difficult to detect serious faults. Early warning.
- This application provides an online monitoring method and system for the aging of switch cabinets, which monitors and analyzes the aging of insulation parts and provides real-time alarms to achieve early warning and prevention.
- the first aspect of this application provides an online monitoring method for switch cabinet aging, including:
- the aging monitoring gas in the switch cabinet is monitored in real time to obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is issued.
- each simulated discharge scenario includes a simulated discharge voltage and a corresponding simulated discharge time
- each simulated discharge scenario also includes multiple simulated discharge voltages and corresponding staged simulated discharge times.
- the simulated discharge of one or more insulation components in the switch cabinet includes:
- the aging monitoring gas is hydrogen, and the gas concentration threshold is 10 ppm.
- the simulated discharge of one or more insulation components in the switch cabinet includes:
- the second aspect of this application provides an online monitoring system for switch cabinet aging, including multiple gas detectors, an online monitoring controller and a simulated discharge module located in the switch cabinet;
- the simulated discharge module is used to perform the following steps: preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios, and based on the multiple simulated discharge scenarios, perform one of the switch cabinet Or a variety of insulating parts are used to simulate discharge, and the leakage current and generated gas under each simulated discharge scenario are measured, and the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations are obtained. According to the corresponding records, the aging is selected. Monitor gases and corresponding gas concentration thresholds;
- the multiple gas detectors are used to monitor the aging monitoring gas in the switch cabinet in real time, obtain the concentration data detected by each gas detector, and send the multiple concentration data to the online monitoring controller;
- the online monitoring controller is used to determine the gas monitoring concentration data corresponding to the aging monitoring gas based on the received multiple concentration data, and determine whether to trigger an alarm based on the gas monitoring concentration data and the gas concentration threshold.
- the online monitoring controller is further configured to:
- the concentration data detected by multiple gas detectors are averaged to obtain the gas monitoring concentration data
- the online monitoring controller is further configured to:
- the gas detector is a sensor, and a plurality of the sensors are evenly distributed on the top of the switch cabinet;
- the senor When the aging monitoring gas is hydrogen, the sensor is a hydrogen monitoring sensor.
- the hydrogen monitoring sensor uses a differential absorption spectrum analysis method to measure hydrogen.
- the spectral band of the differential absorption spectrum analysis method is determined to be 270-310 nm.
- the differential absorption spectrum analysis method is determined to be 270-310 nm.
- the absorption spectrum analysis method uses the Beer-Lambert law for the hydrogen absorption spectrum characteristics that combine continuous and periodic oscillation spectra.
- the switch cabinet aging online monitoring system also includes an intelligent gateway, a 4G/5G communication module and a remote monitoring center.
- the trigger alarm includes:
- the online monitoring controller sends the gas monitoring concentration data and alarm signals to an intelligent gateway or a 4G/5G communication module for transmission to the remote monitoring center by the intelligent gateway or the 4G/5G communication module.
- this application simulates discharge by selecting insulation parts in the switch cabinet. Different simulated discharge voltages and simulated discharge times are used during simulated discharge, different simulated discharge scenarios are preset, and gases in each simulated discharge scenario are collected. Carry out detection and analysis, and finally obtain the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations. Then, based on the corresponding records, select the aging monitoring gas and the corresponding gas concentration threshold. Install a gas detector for the aging detection gas in the switch cabinet, monitor the aging monitoring gas in the switch cabinet in real time through the gas detector, and obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, then Call the police.
- This application can predict and alarm in advance the aging of insulation parts, and the false alarm rate of this application is very low and the accuracy is high.
- Figure 1 is a schematic flow chart of the online monitoring method for switch cabinet aging provided by the embodiment of the present application
- Figure 2 is a schematic structural diagram of the distribution of sensors in the switch cabinet provided by the embodiment of the present application.
- the first aspect of the embodiment of the present application provides an online monitoring method for switch cabinet aging, including steps S1 to S5.
- Each simulated discharge scenario in the embodiment of the present application includes a simulated discharge voltage and a corresponding simulated discharge time, and also includes multiple simulated discharge voltages and corresponding staged simulated discharge times.
- the simulated discharge voltage and simulated discharge time adopted are 20kV voltage applied for 8h.
- the simulated discharge voltage and simulated discharge time adopted are 20kV voltage applied for 8h and then 15kV voltage applied for 5h. They can be combined within a reasonable range based on actual experience, and the embodiments of the present application are not specifically limited here.
- the embodiment of this application first counts the failure rates of various insulating parts in historical switch cabinets, sorts the various insulating parts according to the failure rate, and selects one or more insulating parts with a higher failure rate as a test to simulate discharge.
- elbow and bushing locations with the highest failure rate in the switch cabinet are selected to perform simulated discharge analysis.
- Four simulated discharge scenarios were used, namely applying 20kV voltage for 8h, applying 20kV voltage for 12h, applying 20kV voltage for 12h and then applying 15kV voltage for 8h, and applying 20kV voltage for 12h and then applying 15kV voltage for 8h and then applying 6kV voltage for 8h.
- the embodiment of the present application detects the leakage current and generated gas under each simulated discharge scenario, where the generated gas may include a variety of gases, and the embodiment of the present application detects the gas concentration corresponding to each gas.
- the four serial numbers correspond to four simulated discharge scenarios, and the generated gas types are divided into hydrogen, carbon monoxide, methane and other combustible gases according to the detected concentration of the generated gas.
- the aging monitoring gas and the corresponding gas concentration threshold are reasonably selected based on actual experience.
- the insulating parts age, the most hydrogen is produced, and hydrogen is highly sensitive to different simulated discharge scenarios, so hydrogen is selected as the monitoring object and 10 ppm is selected as the alarm point. That is, the aging monitoring gas is hydrogen, and the corresponding gas concentration threshold is 10 ppm.
- the false alarm rate is very low and the monitoring accuracy is very high.
- a gas detector for the aging monitoring gas can be installed in the switch cabinet to monitor the aging monitoring gas in the switch cabinet in real time to obtain gas monitoring concentration data, and if the gas monitoring If the concentration data is greater than the gas concentration threshold, an alarm will be issued. For example, if the gas monitoring concentration data of detected hydrogen is greater than 10ppm, an alarm can be issued.
- the embodiments of the present application also provide an online switch cabinet aging monitoring system, including multiple gas detectors and online monitoring controllers located in the switch cabinet and Analog discharge module, each gas detector is connected to the online monitoring controller.
- the simulated discharge module is used to perform the following steps: preset multiple simulated discharge voltages and corresponding multiple simulated discharge times, obtain multiple simulated discharge scenarios, and based on the multiple simulated discharge scenarios, perform one or more of the switch cabinets.
- a variety of insulation parts are simulated to discharge, and the leakage current and generated gas under each simulated discharge scenario are measured.
- the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations are obtained. According to the corresponding records, aging monitoring is selected. Gas and corresponding gas concentration threshold.
- the embodiment of the present application installs multiple gas detectors of the aging monitoring gas in the switch cabinet.
- the gas detectors are used to monitor the aging monitoring gas in the switch cabinet in real time to obtain each
- the concentration data detected by the gas detector and multiple concentration data are sent to the online monitoring controller.
- the gas detector is a sensor, and a plurality of the sensors are evenly distributed on the top of the switch cabinet.
- the aging monitoring gas is hydrogen
- the sensor is a hydrogen monitoring sensor.
- Each 110kV substation 35kV switch cabinet is equipped with 4 hydrogen monitoring sensors and a corresponding online monitoring controller.
- Four hydrogen monitoring sensors monitor the hydrogen in the switch cabinet in real time and regularly transmit the detected hydrogen concentration data to the online detection controller.
- the embodiments of this application determined the research spectrum band from 270 to 310 nm through the study of the hydrogen gas absorption spectrum. Based on the characteristics of the hydrogen gas absorption spectrum, that is, the combination of continuous and periodic oscillation spectra, the Beer-Lambert law was used to establish an improved differential absorption spectrum analysis. The method measures hydrogen so that the concentration measurement of hydrogen has better linearity and anti-interference ability. Based on this design and establishment of a hydrogen detection experimental research device, the research results show that the hydrogen monitoring indicators of this method are as follows: when the signal-to-noise ratio is 2, the detection limit is 0.1ppm, the zero-point drift is less than 0.2ppm, and the measurement error and range drift are less than 1% . On this basis, a prototype was developed in the embodiment of this application, and the developed hydrogen monitoring sensor is suitable for online on-site measurement.
- the online monitoring controller determines the gas monitoring concentration data based on the multiple concentration data. For example, the concentration data detected by the multiple gas detectors is taken as the concentration The average value is the obtained gas monitoring concentration data. If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered. For another example, the maximum value among the concentration data detected by multiple gas detectors is selected as the gas monitoring concentration data. If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
- the switch cabinet aging online monitoring system in the embodiment of the present application also includes a smart gateway, a 4G/5G communication module and a remote monitoring center.
- the online monitoring controller can send the gas monitoring concentration data and alarm signals to the smart gateway or 4G/5G communication module to transmit to the remote monitoring center by the smart gateway or the 4G/5G communication module.
- the remote monitoring center can remotely monitor the switch cabinet in real time and provide real-time remote warning.
- the embodiment of the present application performs simulated discharge by selecting insulating parts in the switch cabinet. Different simulated discharge voltages and simulated discharge times are used during simulated discharge, different simulated discharge scenarios are preset, and different simulated discharge scenarios are collected. The gases are detected and analyzed, and finally the corresponding records between the simulated discharge scenario, leakage current, gas type and gas concentration are obtained. Then based on the corresponding records, the aging monitoring gas and the corresponding gas concentration threshold are selected. Install a gas detector for the aging detection gas in the switch cabinet, monitor the aging monitoring gas in the switch cabinet in real time through the gas detector, and obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, then Call the police. This application can predict and alarm in advance the aging of insulation parts, and the false alarm rate of this application is very low and the accuracy is high.
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Abstract
A switch cabinet aging online monitoring method and system, wherein an insulating part in a switch cabinet is selected to perform simulated discharge, different simulated discharge voltages and simulated discharge times are used during the simulated discharge, different simulated discharge scenarios are preset, gas in each simulated discharge scenario is collected for detection and analysis, corresponding records of the simulated discharge scenario, a leakage current, a gas type, and a gas concentration are finally obtained, and then an aging monitoring gas and a corresponding gas concentration threshold are selected according to the corresponding records. A gas detector for a gas monitored for aging is mounted in the switch cabinet, said gas in the switch cabinet is monitored in real time by means of the gas detector to obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than a gas concentration threshold, an alarm is emitted. The aging of the insulating part is predicted and an alarm is emitted in advance by means of the described monitoring method and system; moreover, the false alarm rate is very low, and accuracy is high.
Description
本申请要求在2022年7月26日提交中国专利局、申请号为202210886391.6、发明名称为“一种开关柜老化在线监测方法及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application submitted to the China Patent Office on July 26, 2022, with the application number 202210886391.6 and the invention title "A switch cabinet aging online monitoring method and system", the entire content of which is incorporated by reference. in this application.
本申请涉及电力设备技术领域，具体涉及一种开关柜老化在线监测方法及系统。This application relates to the technical field of electric power equipment, and specifically to an online monitoring method and system for switch cabinet aging.
高压开关柜是一种应用范围广泛的电力设备，其主要是起在电力系统中发电、输电、配电、电能转换和消耗中起通断、控制或保护等作用。由于高压开关柜具有全封闭结构、良好的互换性、容易安装、操作性能和防误操作功能完善以及检修维护方便等特点，已广泛应用于供电系统。High-voltage switchgear is a kind of power equipment with a wide range of applications. It mainly plays the role of switching, control or protection in power generation, transmission, distribution, power conversion and consumption in the power system. High-voltage switchgear has been widely used in power supply systems due to its fully enclosed structure, good interchangeability, easy installation, perfect operating performance and misoperation prevention functions, and convenient maintenance and repair.
随着高压开关柜向小型化方向发展，开关柜的外形尺寸及占地面积大大缩小，带电体之间、带电体与地电位之间的距离也随之缩小。由于制造和运行环境等原因，现有高压开关柜大多采用底板开通风口，后板和顶板密封的设计，除湿设备通常采用平板式加热器，效果不佳。加上运行条件差，电缆沟内部积水严重而且通风不畅，特别是高温、高湿和昼夜温差大的地区，极易在固体绝缘材料表面形成凝露。此外，某些开关柜密封不严造成绝缘件表面污秽严重，绝缘件表面的污秽在凝露的湿润下成为导电或半导电层，其表面的泄露电流增大，引起局部过热，局部过热进而引起绝缘老化加速，绝缘老化更进一步引起泄露电流增大，进而恶性循环。With the development of high-voltage switch cabinets in the direction of miniaturization, the overall dimensions and floor space of the switch cabinets have been greatly reduced, and the distances between live bodies and between live bodies and ground potential have also been reduced. Due to reasons such as manufacturing and operating environment, most existing high-voltage switch cabinets adopt a design with vents on the bottom plate and sealed rear and top plates. Dehumidification equipment usually uses flat-plate heaters, which are not effective. Coupled with poor operating conditions, there is serious water accumulation inside the cable trench and poor ventilation. Especially in areas with high temperature, high humidity and large temperature differences between day and night, it is easy for condensation to form on the surface of solid insulation materials. In addition, some switch cabinets are not tightly sealed, resulting in serious contamination on the surface of the insulating parts. The contamination on the surface of the insulating parts becomes a conductive or semi-conductive layer under the moisture of condensation. The leakage current on the surface increases, causing local overheating, which in turn causes Insulation aging accelerates, and insulation aging further causes leakage current to increase, thus creating a vicious cycle.
现有技术提供一种根据声音和温度对开关柜老化进行在线监测的方法，然而声音和温度均是在发生严重放电情况下才能有效监测，其监测的时间段靠后，很难在发生严重故障前提前预警。The existing technology provides a method for online monitoring of the aging of switch cabinets based on sound and temperature. However, both sound and temperature can only be effectively monitored when severe discharge occurs. The monitoring time period is relatively late, making it difficult to detect serious faults. Early warning.
发明内容Contents of the invention
本申请提供一种开关柜老化在线监测方法及系统，监测和分析绝缘件老化并实时报警，做到提前预警和提前预防。This application provides an online monitoring method and system for the aging of switch cabinets, which monitors and analyzes the aging of insulation parts and provides real-time alarms to achieve early warning and prevention.
本申请第一方面提供一种开关柜老化在线监测方法，包括：The first aspect of this application provides an online monitoring method for switch cabinet aging, including:
预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景；Preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios;
基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电；Based on the multiple simulated discharge scenarios, perform simulated discharge on one or more insulating parts in the switch cabinet;
检测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录；Detect leakage current and generated gas under each simulated discharge scenario, and obtain corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations;
根据所述对应记录，选取老化监测气体和对应的气体浓度阈值；According to the corresponding record, select the aging monitoring gas and the corresponding gas concentration threshold;
实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。The aging monitoring gas in the switch cabinet is monitored in real time to obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is issued.
可选的，所述每种模拟放电情景包括一种模拟放电电压和对应的一种模拟放电时间，所述每种模拟放电情景还包括多种模拟放电电压和对应阶段性的模拟放电时间。Optionally, each simulated discharge scenario includes a simulated discharge voltage and a corresponding simulated discharge time, and each simulated discharge scenario also includes multiple simulated discharge voltages and corresponding staged simulated discharge times.
可选的，所述对开关柜中的一种或多种绝缘件进行模拟放电，包括：Optionally, the simulated discharge of one or more insulation components in the switch cabinet includes:
统计历史开关柜中多种绝缘件的故障率；Statistics on the failure rate of various insulation components in historical switch cabinets;
根据故障率对多种绝缘件进行排序；Sort various insulation components according to failure rate;
根据排序选取其中一种或多种绝缘件进行模拟放电。Select one or more insulating parts according to the order to simulate discharge.
可选的，所述老化监测气体为氢气，所述气体浓度阈值为10ppm。Optionally, the aging monitoring gas is hydrogen, and the gas concentration threshold is 10 ppm.
可选的，所述对开关柜中的一种或多种绝缘件进行模拟放电，包括：Optionally, the simulated discharge of one or more insulation components in the switch cabinet includes:
选取肘型头和套管位置进行模拟放电。Select the elbow and casing positions to simulate discharge.
本申请第二方面提供一种开关柜老化在线监测系统，包括位于开关柜内的多个气体检测器和在线监测控制器以及模拟放电模块；The second aspect of this application provides an online monitoring system for switch cabinet aging, including multiple gas detectors, an online monitoring controller and a simulated discharge module located in the switch cabinet;
所述模拟放电模块用于执行以下步骤：预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景，基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电，测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录，根据所述对应记录，选取老化监测气体和对应的气体浓度阈值；The simulated discharge module is used to perform the following steps: preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios, and based on the multiple simulated discharge scenarios, perform one of the switch cabinet Or a variety of insulating parts are used to simulate discharge, and the leakage current and generated gas under each simulated discharge scenario are measured, and the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations are obtained. According to the corresponding records, the aging is selected. Monitor gases and corresponding gas concentration thresholds;
所述多个气体检测器用于实时监测开关柜内老化监测气体，得到每个气体检测器检测的浓度数据，以及多个浓度数据发送至所述在线监测控制器；The multiple gas detectors are used to monitor the aging monitoring gas in the switch cabinet in real time, obtain the concentration data detected by each gas detector, and send the multiple concentration data to the online monitoring controller;
所述在线监测控制器用于根据接收的多个浓度数据确定老化监测气体对应的气体监测浓度数据，以及根据气体监测浓度数据和气体浓度阈值，判断是否触发报警。The online monitoring controller is used to determine the gas monitoring concentration data corresponding to the aging monitoring gas based on the received multiple concentration data, and determine whether to trigger an alarm based on the gas monitoring concentration data and the gas concentration threshold.
可选的，所述在线监测控制器进一步被配置为：Optionally, the online monitoring controller is further configured to:
将多个气体检测器检测的浓度数据取浓度平均值，得到的气体监测浓度数据；The concentration data detected by multiple gas detectors are averaged to obtain the gas monitoring concentration data;
如果所述的气体监测浓度数据大于所述气体浓度阈值，则触发报警。If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
可选的，所述在线监测控制器进一步被配置为：Optionally, the online monitoring controller is further configured to:
选取多个气体检测器检测的浓度数据中最大值作为气体监测浓度数据；Select the maximum value among the concentration data detected by multiple gas detectors as the gas monitoring concentration data;
如果所述气体监测浓度数据大于所述气体浓度阈值，则触发报警。If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
可选的，所述气体检测器为传感器，多个所述传感器均匀分布在开关柜顶部；Optionally, the gas detector is a sensor, and a plurality of the sensors are evenly distributed on the top of the switch cabinet;
当老化监测气体为氢气时，所述传感器为氢气监测传感器，所述氢气监测传感器采用差分吸收光谱分析方法对氢气测量，所述差分吸收光谱分析方法的光谱波段确定为270～310nm，所述差分吸收光谱分析方法针对连续和周期震荡光谱结合的氢气吸收光谱特性，利用Beer-Lambert定律。When the aging monitoring gas is hydrogen, the sensor is a hydrogen monitoring sensor. The hydrogen monitoring sensor uses a differential absorption spectrum analysis method to measure hydrogen. The spectral band of the differential absorption spectrum analysis method is determined to be 270-310 nm. The differential absorption spectrum analysis method is determined to be 270-310 nm. The absorption spectrum analysis method uses the Beer-Lambert law for the hydrogen absorption spectrum characteristics that combine continuous and periodic oscillation spectra.
可选的，所述开关柜老化在线监测系统还包括智能网关、4G/5G通信模块和远程监测中心，所述触发报警包括：Optionally, the switch cabinet aging online monitoring system also includes an intelligent gateway, a 4G/5G communication module and a remote monitoring center. The trigger alarm includes:
所述在线监测控制器将所述气体监测浓度数据和报警信号发送至智能网关或4G/5G通信模块，以由所述智能网关或所述4G/5G通信模块传输至所述远程监测中心。The online monitoring controller sends the gas monitoring concentration data and alarm signals to an intelligent gateway or a 4G/5G communication module for transmission to the remote monitoring center by the intelligent gateway or the 4G/5G communication module.
由以上方案可知，本申请通过选取开关柜内的绝缘件进行模拟放电，模拟放电时采用不同的模拟放电电压和模拟放电时间，预设不同的模拟放电场景，收集每种模拟放电场景下的气体进行检测分析，最终得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录，再根据所述对应记录，选取老化监测气体和对应的气体浓度阈值。在开关柜内安装该老化检测气体的气体检测器，通过气体检测器实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。本申请将绝缘件的老化做到提前预测和提前报警，并且本申请的误报警率很低，准确度高。It can be seen from the above scheme that this application simulates discharge by selecting insulation parts in the switch cabinet. Different simulated discharge voltages and simulated discharge times are used during simulated discharge, different simulated discharge scenarios are preset, and gases in each simulated discharge scenario are collected. Carry out detection and analysis, and finally obtain the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations. Then, based on the corresponding records, select the aging monitoring gas and the corresponding gas concentration threshold. Install a gas detector for the aging detection gas in the switch cabinet, monitor the aging monitoring gas in the switch cabinet in real time through the gas detector, and obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, then Call the police. This application can predict and alarm in advance the aging of insulation parts, and the false alarm rate of this application is very low and the accuracy is high.
图1为本申请实施例提供的开关柜老化在线监测方法的流程示意图；Figure 1 is a schematic flow chart of the online monitoring method for switch cabinet aging provided by the embodiment of the present application;
图2为本申请实施例提供的开关柜内传感器分布的结构示意图。Figure 2 is a schematic structural diagram of the distribution of sensors in the switch cabinet provided by the embodiment of the present application.
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.
参见图1，本申请实施例第一方面提供一种开关柜老化在线监测方法，包括步骤 S1至步骤S5。Referring to Figure 1, the first aspect of the embodiment of the present application provides an online monitoring method for switch cabinet aging, including steps S1 to S5.
S1、预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景。S1. Preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios.
本申请实施例的每种模拟放电情景包括一种模拟放电电压和对应的一种模拟放电时间，还包括多种模拟放电电压和对应阶段性的模拟放电时间，例如，在一种模拟放电场景下，采取的模拟放电电压和模拟放电时间为施加20kV电压8h，又例如，在另一种模拟放电场景下，采取的模拟放电电压和模拟放电时间为依次施加20kV电压8h后15kV电压5h。可以根据实际经验在合理的范围内组合，本申请实施例在此不作具体限制。Each simulated discharge scenario in the embodiment of the present application includes a simulated discharge voltage and a corresponding simulated discharge time, and also includes multiple simulated discharge voltages and corresponding staged simulated discharge times. For example, in a simulated discharge scenario , the simulated discharge voltage and simulated discharge time adopted are 20kV voltage applied for 8h. For example, in another simulated discharge scenario, the simulated discharge voltage and simulated discharge time adopted are 20kV voltage applied for 8h and then 15kV voltage applied for 5h. They can be combined within a reasonable range based on actual experience, and the embodiments of the present application are not specifically limited here.
S2、基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电。S2. Based on the multiple simulated discharge scenarios, perform simulated discharge on one or more insulation parts in the switch cabinet.
本申请实施例首先统计历史开关柜中多种绝缘件的故障率，根据故障率对多种绝缘件进行排序，选取其中故障率较高的一种或多种绝缘件作为试验进行模拟放电。The embodiment of this application first counts the failure rates of various insulating parts in historical switch cabinets, sorts the various insulating parts according to the failure rate, and selects one or more insulating parts with a higher failure rate as a test to simulate discharge.
示例性地，选取开关柜中故障率最高的肘型头和套管位置，进行模拟放电分析。采用四种模拟放电场景，分别为施加20kV电压8h、施加20kV电压12h、依次施加20kV电压12h后施加15kV电压8h以及依次施加20kV电压12h后施加15kV电压8h后施加6kV电压8h。For example, the elbow and bushing locations with the highest failure rate in the switch cabinet are selected to perform simulated discharge analysis. Four simulated discharge scenarios were used, namely applying 20kV voltage for 8h, applying 20kV voltage for 12h, applying 20kV voltage for 12h and then applying 15kV voltage for 8h, and applying 20kV voltage for 12h and then applying 15kV voltage for 8h and then applying 6kV voltage for 8h.
S3、检测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录。S3. Detect the leakage current and generated gas under each simulated discharge scenario, and obtain the corresponding records between the simulated discharge scenario, leakage current, gas type and gas concentration.
本申请实施例检测每种模拟放电情景下的泄露电流和产生气体，其中，产生气体可能包括多种气体，本申请实施例检测每种气体对应的气体浓度。The embodiment of the present application detects the leakage current and generated gas under each simulated discharge scenario, where the generated gas may include a variety of gases, and the embodiment of the present application detects the gas concentration corresponding to each gas.
示例性地，如下表1所示，4个序号对应四种模拟放电场景，根据检测的产生气体的浓度将产生的气体种类分为氢气、一氧化碳、甲烷和其他可燃气体。For example, as shown in Table 1 below, the four serial numbers correspond to four simulated discharge scenarios, and the generated gas types are divided into hydrogen, carbon monoxide, methane and other combustible gases according to the detected concentration of the generated gas.
表1模拟放电的对应记录Table 1 Corresponding records of simulated discharge
S4、根据所述对应记录，选取老化监测气体和对应的气体浓度阈值。S4. Select the aging monitoring gas and the corresponding gas concentration threshold according to the corresponding record.
根据模拟放电的对应记录，根据实际经验合理地选择老化监测气体和对应的气体浓度阈值。According to the corresponding records of simulated discharge, the aging monitoring gas and the corresponding gas concentration threshold are reasonably selected based on actual experience.
示例性地，如表1所述，在绝缘件发生老化时，产生的氢气最多，且氢气的对于不同的模拟放电情景的敏感度较高，所以选择氢气作为监测对象，选取10ppm作为报警点，即老化监测气体为氢气，对应的气体浓度阈值为10ppm。此外，由于氢气是非大气中常见的气体，所以误报警率很低，监测的准确率很高。For example, as shown in Table 1, when the insulating parts age, the most hydrogen is produced, and hydrogen is highly sensitive to different simulated discharge scenarios, so hydrogen is selected as the monitoring object and 10 ppm is selected as the alarm point. That is, the aging monitoring gas is hydrogen, and the corresponding gas concentration threshold is 10 ppm. In addition, since hydrogen is a common gas not found in the atmosphere, the false alarm rate is very low and the monitoring accuracy is very high.
S5、实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。S5. Monitor the aging monitoring gas in the switch cabinet in real time to obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is issued.
在确定老化监测气体和对应的气体浓度阈值后，可以在开关柜内安装该老化监测气体的气体检测器，实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。比如检测到的氢气的气体监测浓度数据大于10ppm，则可进行报警。After determining the aging monitoring gas and the corresponding gas concentration threshold, a gas detector for the aging monitoring gas can be installed in the switch cabinet to monitor the aging monitoring gas in the switch cabinet in real time to obtain gas monitoring concentration data, and if the gas monitoring If the concentration data is greater than the gas concentration threshold, an alarm will be issued. For example, if the gas monitoring concentration data of detected hydrogen is greater than 10ppm, an alarm can be issued.
为了更加清楚地说明本申请实施例提供的开关柜老化在线监测方法，本申请实施例还提供一种开关柜老化在线监测系统，包括位于开关柜内的多个气体检测器和在线监测控制器以及模拟放电模块，每个气体检测器均与在线监测控制器连接。In order to more clearly illustrate the switch cabinet aging online monitoring method provided by the embodiments of the present application, the embodiments of the present application also provide an online switch cabinet aging monitoring system, including multiple gas detectors and online monitoring controllers located in the switch cabinet and Analog discharge module, each gas detector is connected to the online monitoring controller.
该模拟放电模块用于执行以下步骤：预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景，基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电，测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录，根据所述对应记录，选取老化监测气体和对应的气体浓度阈值。The simulated discharge module is used to perform the following steps: preset multiple simulated discharge voltages and corresponding multiple simulated discharge times, obtain multiple simulated discharge scenarios, and based on the multiple simulated discharge scenarios, perform one or more of the switch cabinets. A variety of insulation parts are simulated to discharge, and the leakage current and generated gas under each simulated discharge scenario are measured. The corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations are obtained. According to the corresponding records, aging monitoring is selected. Gas and corresponding gas concentration threshold.
该模拟放电模块的具体细节可以参考前述的开关柜老化在线监测方法，本申请实施例在此不再赘述。For specific details of the simulated discharge module, please refer to the aforementioned on-line monitoring method for switchgear aging, and the embodiments of this application will not be repeated here.
在确定老化监测气体和对应的气体浓度阈值之后，本申请实施例在开关柜内安装多个该老化监测气体的气体检测器，该气体检测器用于实时监测开关柜内老化监测气体，得到每个气体检测器检测的浓度数据，以及多个浓度数据发送至所述在线监测控制器。After determining the aging monitoring gas and the corresponding gas concentration threshold, the embodiment of the present application installs multiple gas detectors of the aging monitoring gas in the switch cabinet. The gas detectors are used to monitor the aging monitoring gas in the switch cabinet in real time to obtain each The concentration data detected by the gas detector and multiple concentration data are sent to the online monitoring controller.
在一部分优选实施例中，气体检测器气体检测器为传感器，多个所述传感器均匀分布在开关柜顶部。参见图2，老化监测气体为氢气，所述传感器为氢气监测传感器，每个110kV变电站35kV开关柜装有4个氢气监测传感器和一个对应的在线监测控制 器。4个氢气监测传感器实时监测开关柜的氢气，定时将检测的氢气浓度数据传输至在线检测控制器。In some preferred embodiments, the gas detector is a sensor, and a plurality of the sensors are evenly distributed on the top of the switch cabinet. Referring to Figure 2, the aging monitoring gas is hydrogen, and the sensor is a hydrogen monitoring sensor. Each 110kV substation 35kV switch cabinet is equipped with 4 hydrogen monitoring sensors and a corresponding online monitoring controller. Four hydrogen monitoring sensors monitor the hydrogen in the switch cabinet in real time and regularly transmit the detected hydrogen concentration data to the online detection controller.
进一步的，本申请实施例通过对氢气体吸收光谱的研究，确定研究光谱波段270至310nm，针对氢气吸收光谱特征即连续和周期震荡光谱结合，利用Beer-Lambert定律，建立改进的差分吸收光谱分析方法对氢气测量，使氢气的浓度测量有更好的线性度和抗干扰能力。基于此设计并建立氢气检测实验研究装置，研究结果表明该方法对氢气监测指标如下：在信噪比为2时的探测限为0.1ppm，零点漂移小于0.2ppm，测量误差和量程飘移小于1％。在此基础上，本申请实施例研制样机，开发的氢气监测传感器适合用于在线现场测量。Furthermore, the embodiments of this application determined the research spectrum band from 270 to 310 nm through the study of the hydrogen gas absorption spectrum. Based on the characteristics of the hydrogen gas absorption spectrum, that is, the combination of continuous and periodic oscillation spectra, the Beer-Lambert law was used to establish an improved differential absorption spectrum analysis. The method measures hydrogen so that the concentration measurement of hydrogen has better linearity and anti-interference ability. Based on this design and establishment of a hydrogen detection experimental research device, the research results show that the hydrogen monitoring indicators of this method are as follows: when the signal-to-noise ratio is 2, the detection limit is 0.1ppm, the zero-point drift is less than 0.2ppm, and the measurement error and range drift are less than 1% . On this basis, a prototype was developed in the embodiment of this application, and the developed hydrogen monitoring sensor is suitable for online on-site measurement.
在多个气体检测器将多个浓度数据发送至所述在线监测控制器后，在线监测控制器根据多个浓度数据确定气体监测浓度数据，例如，将多个气体检测器检测的浓度数据取浓度平均值，得到的气体监测浓度数据，如果所述的气体监测浓度数据大于所述气体浓度阈值，则触发报警。又例如，选取多个气体检测器检测的浓度数据中最大值作为气体监测浓度数据，如果所述气体监测浓度数据大于所述气体浓度阈值，则触发报警。After the multiple gas detectors send multiple concentration data to the online monitoring controller, the online monitoring controller determines the gas monitoring concentration data based on the multiple concentration data. For example, the concentration data detected by the multiple gas detectors is taken as the concentration The average value is the obtained gas monitoring concentration data. If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered. For another example, the maximum value among the concentration data detected by multiple gas detectors is selected as the gas monitoring concentration data. If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
本申请实施例的开关柜老化在线监测系统还包括智能网关、4G/5G通信模块和远程监测中心，在线监测控制器可以将所述气体监测浓度数据和报警信号发送至智能网关或4G/5G通信模块，以由所述智能网关或所述4G/5G通信模块传输至所述远程监测中心。如此，远程监测中心可以远程对开关柜实时监测，远程即时预警。The switch cabinet aging online monitoring system in the embodiment of the present application also includes a smart gateway, a 4G/5G communication module and a remote monitoring center. The online monitoring controller can send the gas monitoring concentration data and alarm signals to the smart gateway or 4G/5G communication module to transmit to the remote monitoring center by the smart gateway or the 4G/5G communication module. In this way, the remote monitoring center can remotely monitor the switch cabinet in real time and provide real-time remote warning.
由以上方案可知，本申请实施例通过选取开关柜内的绝缘件进行模拟放电，模拟放电时采用不同的模拟放电电压和模拟放电时间，预设不同的模拟放电场景，收集每种模拟放电场景下的气体进行检测分析，最终得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录，再根据所述对应记录，选取老化监测气体和对应的气体浓度阈值。在开关柜内安装该老化检测气体的气体检测器，通过气体检测器实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。本申请将绝缘件的老化做到提前预测和提前报警，并且本申请的误报警率很低，准确度高。It can be seen from the above solution that the embodiment of the present application performs simulated discharge by selecting insulating parts in the switch cabinet. Different simulated discharge voltages and simulated discharge times are used during simulated discharge, different simulated discharge scenarios are preset, and different simulated discharge scenarios are collected. The gases are detected and analyzed, and finally the corresponding records between the simulated discharge scenario, leakage current, gas type and gas concentration are obtained. Then based on the corresponding records, the aging monitoring gas and the corresponding gas concentration threshold are selected. Install a gas detector for the aging detection gas in the switch cabinet, monitor the aging monitoring gas in the switch cabinet in real time through the gas detector, and obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, then Call the police. This application can predict and alarm in advance the aging of insulation parts, and the false alarm rate of this application is very low and the accuracy is high.
Claims (10)
- 一种开关柜老化在线监测方法，其特征在于，包括：An online monitoring method for switchgear aging, which is characterized by including:预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景；Preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios;基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电；Based on the multiple simulated discharge scenarios, perform simulated discharge on one or more insulating parts in the switch cabinet;检测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录；Detect leakage current and generated gas under each simulated discharge scenario, and obtain corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations;根据所述对应记录，选取老化监测气体和对应的气体浓度阈值；According to the corresponding record, select the aging monitoring gas and the corresponding gas concentration threshold;实时监测开关柜内老化监测气体，得到气体监测浓度数据，以及，如果所述气体监测浓度数据大于所述气体浓度阈值，则进行报警。The aging monitoring gas in the switch cabinet is monitored in real time to obtain gas monitoring concentration data, and if the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is issued.
- 根据权利要求1所述的一种开关柜老化在线监测方法，其特征在于，所述每种模拟放电情景包括一种模拟放电电压和对应的一种模拟放电时间，所述每种模拟放电情景还包括多种模拟放电电压和对应阶段性的模拟放电时间。An online monitoring method for switch cabinet aging according to claim 1, wherein each simulated discharge scenario includes a simulated discharge voltage and a corresponding simulated discharge time, and each simulated discharge scenario also includes a simulated discharge voltage and a corresponding simulated discharge time. Including a variety of simulated discharge voltages and corresponding staged simulated discharge times.
- 根据权利要求1所述的一种开关柜老化在线监测方法，其特征在于，所述对开关柜中的一种或多种绝缘件进行模拟放电，包括：An online monitoring method for switch cabinet aging according to claim 1, characterized in that the simulated discharge of one or more insulating parts in the switch cabinet includes:统计历史开关柜中多种绝缘件的故障率；Statistics on the failure rate of various insulation components in historical switch cabinets;根据故障率对多种绝缘件进行排序；Sort various insulation components according to failure rate;根据排序选取其中一种或多种绝缘件进行模拟放电。Select one or more insulating parts according to the sorting to simulate discharge.
- 根据权利要求1所述的一种开关柜老化在线监测方法，其特征在于，所述老化监测气体为氢气，所述气体浓度阈值为10ppm。An online monitoring method for switch cabinet aging according to claim 1, characterized in that the aging monitoring gas is hydrogen, and the gas concentration threshold is 10 ppm.
- 根据权利要求1所述的一种开关柜老化在线监测方法，其特征在于，所述对开关柜中的一种或多种绝缘件进行模拟放电，包括：An online monitoring method for switch cabinet aging according to claim 1, characterized in that the simulated discharge of one or more insulating parts in the switch cabinet includes:选取肘型头和套管位置进行模拟放电。Select the elbow and casing positions to simulate discharge.
- 一种开关柜老化在线监测系统，其特征在于，包括位于开关柜内的多个气体检测器和在线监测控制器以及模拟放电模块；An online monitoring system for switch cabinet aging, which is characterized by including multiple gas detectors, an online monitoring controller and a simulated discharge module located in the switch cabinet;所述模拟放电模块用于执行以下步骤：预设多种模拟放电电压和对应的多种模拟放电时间，得到多种模拟放电情景，基于所述多种模拟放电情景，对开关柜中的一种或多种绝缘件进行模拟放电，测每种模拟放电情景下的泄露电流和产生气体，得到模拟放电情景、泄露电流、气体种类和气体浓度之间的对应记录，根据所述对应记录，选取老化监测气体和对应的气体浓度阈值；The simulated discharge module is used to perform the following steps: preset multiple simulated discharge voltages and corresponding multiple simulated discharge times to obtain multiple simulated discharge scenarios, and based on the multiple simulated discharge scenarios, perform one of the switch cabinet Or a variety of insulating parts are used to simulate discharge, and the leakage current and generated gas under each simulated discharge scenario are measured, and the corresponding records between simulated discharge scenarios, leakage current, gas types and gas concentrations are obtained. According to the corresponding records, the aging is selected. Monitor gases and corresponding gas concentration thresholds;所述多个气体检测器用于实时监测开关柜内老化监测气体，得到每个气体检测器检测的浓度数据，以及多个浓度数据发送至所述在线监测控制器；The multiple gas detectors are used to monitor the aging monitoring gas in the switch cabinet in real time, obtain the concentration data detected by each gas detector, and send the multiple concentration data to the online monitoring controller;所述在线监测控制器用于根据接收的多个浓度数据确定老化监测气体对应的气体监测浓度数据，以及根据气体监测浓度数据和气体浓度阈值，判断是否触发报警。The online monitoring controller is used to determine the gas monitoring concentration data corresponding to the aging monitoring gas based on the received multiple concentration data, and determine whether to trigger an alarm based on the gas monitoring concentration data and the gas concentration threshold.
- 根据权利要求6所述的一种开关柜老化在线监测系统，其特征在于，所述在线监测控制器进一步被配置为：An online monitoring system for switchgear aging according to claim 6, characterized in that the online monitoring controller is further configured to:将多个气体检测器检测的浓度数据取浓度平均值，得到的气体监测浓度数据；The concentration data detected by multiple gas detectors are averaged to obtain the gas monitoring concentration data;如果所述的气体监测浓度数据大于所述气体浓度阈值，则触发报警。If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
- 根据权利要求6所述的一种开关柜老化在线监测系统，其特征在于，所述在线监测控制器进一步被配置为：An online monitoring system for switchgear aging according to claim 6, characterized in that the online monitoring controller is further configured to:选取多个气体检测器检测的浓度数据中最大值作为气体监测浓度数据；Select the maximum value among the concentration data detected by multiple gas detectors as the gas monitoring concentration data;如果所述气体监测浓度数据大于所述气体浓度阈值，则触发报警。If the gas monitoring concentration data is greater than the gas concentration threshold, an alarm is triggered.
- 根据权利要求6所述的一种开关柜老化在线监测系统，其特征在于，所述气体检测器为传感器，多个所述传感器均匀分布在开关柜顶部；An online monitoring system for switch cabinet aging according to claim 6, characterized in that the gas detector is a sensor, and a plurality of the sensors are evenly distributed on the top of the switch cabinet;当老化监测气体为氢气时，所述传感器为氢气监测传感器，所述氢气监测传感器采用差分吸收光谱分析方法对氢气测量，所述差分吸收光谱分析方法的光谱波段确定为270～310nm，所述差分吸收光谱分析方法针对连续和周期震荡光谱结合的氢气吸收光谱特性，利用Beer-Lambert定律。When the aging monitoring gas is hydrogen, the sensor is a hydrogen monitoring sensor. The hydrogen monitoring sensor uses a differential absorption spectrum analysis method to measure hydrogen. The spectral band of the differential absorption spectrum analysis method is determined to be 270-310 nm. The differential absorption spectrum analysis method is determined to be 270-310 nm. The absorption spectrum analysis method uses the Beer-Lambert law for the hydrogen absorption spectrum characteristics that combine continuous and periodic oscillation spectra.
- 根据权利要求6所述的一种开关柜老化在线监测系统，其特征在于，所述开关柜老化在线监测系统还包括智能网关、4G/5G通信模块和远程监测中心，所述触发报警包括：A switch cabinet aging online monitoring system according to claim 6, characterized in that the switch cabinet aging online monitoring system also includes an intelligent gateway, a 4G/5G communication module and a remote monitoring center, and the triggering alarm includes:所述在线监测控制器将所述气体监测浓度数据和报警信号发送至智能网关或4G/5G通信模块，以由所述智能网关或所述4G/5G通信模块传输至所述远程监测中心。The online monitoring controller sends the gas monitoring concentration data and alarm signals to an intelligent gateway or a 4G/5G communication module for transmission to the remote monitoring center by the intelligent gateway or the 4G/5G communication module.
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