WO2014082536A1 - Method and device for monitoring gas in transformer oil online - Google Patents

Method and device for monitoring gas in transformer oil online Download PDF

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Publication number
WO2014082536A1
WO2014082536A1 PCT/CN2013/087292 CN2013087292W WO2014082536A1 WO 2014082536 A1 WO2014082536 A1 WO 2014082536A1 CN 2013087292 W CN2013087292 W CN 2013087292W WO 2014082536 A1 WO2014082536 A1 WO 2014082536A1
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gas
module
oil
standard
unit
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PCT/CN2013/087292
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French (fr)
Chinese (zh)
Inventor
张�杰
谷山强
周盛
姚翔宇
董勤
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国网电力科学研究院武汉南瑞有限责任公司
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Publication of WO2014082536A1 publication Critical patent/WO2014082536A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2841—Gas in oils, e.g. hydrogen in insulating oils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
    • G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
    • G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
    • G01N2030/8854—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds involving hydrocarbons

Definitions

  • the present invention relates to the field of substation condition monitoring technologies, and more particularly to a method and apparatus for online monitoring of gas in a transformer oil.
  • gas online monitoring technology in transformer oil has been widely and effectively applied.
  • the gas on-line monitoring system in transformer oil mainly performs gas separation by a single column, and then gas detection by a semiconductor gas sensor. Its semiconductor gas sensor has shortcomings such as severe characteristic drift, low stability, and difficulty in selection.
  • CN200910054895.6 Authorization Publication No. CN101629934A
  • a "transformer oil chromatography on-line monitoring system” which uses a standard gas to perform calibration recording of a device, completes a calibration curve by a curve fitting algorithm of least squares method, and imports it into a computer.
  • the gas content in the oil is calculated by detecting the gas composition ratio after the separation of the transformer oil.
  • This method uses the standard gas calibration method, ignoring the uncertainty of the oil and gas separation and the stability difference, it is difficult to obtain good detection results. On the other hand, this method ignores the drift problem of the gas detector, and cannot perform the calibration of the detector in the field to improve the measurement accuracy of the gas in the oil.
  • the present invention provides an online gas monitoring system for a transformer oil having a gas sensor automatic correction function.
  • the invention carries out the factory calibration of the standard oil sample through the factory test, and records the factory record of the specific standard gas sensor, compares and corrects the peak height test and the factory record of the same standard gas on the site, and corrects and reduces the characteristic drift of the gas detector.
  • the invention has far-reaching significance for improving the long-term stability of the gas on-line monitoring system in the transformer oil and ensuring the safe and stable operation of the transformer.
  • the technical solution of the present invention is: a device for online monitoring of gas in a transformer oil, comprising: an oil and gas separation module, an automatic calibration module, a carrier gas control module, a detection module, a control acquisition module, and a management analysis module,
  • the oil and gas separation module comprises a quantitative oil inlet unit and a degassing unit;
  • the automatic calibration module comprises a standard gas, a sample gas control valve, a standard gas control valve and a three-way injection tube;
  • the carrier gas control module comprises a nitrogen gas cylinder and a carrier gas control valve
  • the detection module includes an injector, a column separator, a gas sensor, and a thermostat unit;
  • the control acquisition module comprises a control unit and an acquisition conversion unit, and the control module controls the oil separation unit, the automatic correction module, the carrier gas control module and the detection module, and controls the start and stop of the acquisition conversion module to control the collection of the acquisition module.
  • the output of the conversion module is connected to the data management layer;
  • the management analysis module includes a data management unit, a data analysis unit, and a data correction unit and a peak identification unit. After receiving the converted data, the management analysis module passes the The peak identification unit, the data correction unit, the data management unit, and the data analysis unit output the analysis result and transmit the result to the user;
  • the oil and gas separation module receives the input of the transformer oil sample, and after the quantitative oil inlet unit and the degassing unit, the output of the oil separation module and the sample gas port of the automatic calibration module are connected through the “sample gas control valve”, and The separation gas is output; the calibration gas port of the automatic calibration module is connected to the standard gas through the "standard gas control valve”, and the output of the automatic calibration module and the output of the carrier gas control module are connected with the detection module, and are separated by the injector and the column. After the components are separated, they are detected by a gas sensitive detector, and the output end of the detection module is connected to the acquisition conversion module.
  • the apparatus for online monitoring of gas in a transformer oil as described above is characterized in that: the automatic correction module comprises: a sample gas control valve, a standard gas, a standard gas control valve, and a three-way sampling unit.
  • the device for monitoring the gas in the transformer oil on-line as described above is characterized in that: the detection module comprises: a thermostat unit, an injector, a column separator, a semiconductor gas sensor, wherein the thermostat unit is used for temperature control,
  • the injector is connected to the output of the automatic calibration module and the carrier gas output, the output of the injector is connected to the chromatographic separator, and the output of the chromatographic separator is connected to the input of the semiconductor gas sensor, which will detect the generated simulation.
  • the signal is output to the acquisition and conversion unit of the control acquisition module that controls the acquisition module.
  • the device for monitoring the gas in the transformer oil on-line as described above is characterized in that: the acquisition conversion unit comprises: a signal conversion circuit and an AD sampling circuit, and the acquisition conversion unit converts the analog signal through the signal conversion circuit, and then passes the AD. The converter samples the signal and transmits it to the management analysis module.
  • the control unit is composed of a digital processor, and the oil and gas separation module and the automatic correction module are performed by monitoring the carrier gas pressure, temperature, and oil and gas separation state of the system. , control of carrier gas control module and detection module.
  • a method for online monitoring of gas in a transformer oil characterized by comprising a factory calibration link and a field application link.
  • the factory calibration process includes the following steps: Step 1. After the transformer system assembly test is completed, perform system repeatability test.
  • Step 2 After the system repeatability test is passed, the system calibration step is performed. First, the oil sample calibration test is carried out to obtain the voltage peaks of different component gases of various concentration standard oil samples, and the oil sample calibration curve is generated.
  • Step 3 After the calibration of the oil sample is completed, the calibration test of the standard gas is performed. A multi-component standard gas detection procedure is performed to obtain voltage peaks for different components of a particular standard gas as factory calibration data for the standard gas.
  • Step 4 Using the factory calibration data of the standard gas as a numerator, and using the peak gas data of each component of the subsequent standard gas as a denominator, calculate and calculate the calibration coefficient of each group of standard gases (the correction coefficient is 1 at the factory).
  • Step 1 In the field application, if the working time is long or the sensor characteristics drift, the automatic calibration procedure is started automatically or manually: The automatic calibration procedure opens the "standard gas control valve", and opens the same standard gas as the factory calibration link. A calibration test of a multi-component standard gas to obtain voltage peaks of different components of a specific standard gas as field application data of a standard gas. Step 2: Using the factory calibration data of the standard gas as a numerator, the peak value data of each component gas voltage applied in the field is used as a denominator, and the correction coefficient for generating each component gas is recalculated. If the performance is attenuated by sensor contamination or aging, the correction factor is greater than 1; if the response is amplified, the correction factor is less than 1; if it is basically unchanged, it remains approximately equal to 1.
  • Step 3 After the end of the standard gas calibration step, the gas concentration in the actual transformer oil is detected, and the gas concentration of each component of the gas in the transformer oil is obtained.
  • Step 4 Multiply the gas concentration data of each component of the gas in the transformer oil by the correction coefficient under the field application condition to obtain the gas concentration data of each component of the gas in the transformer oil after the calibration.
  • Step 5 Comparing the gas concentration data of each component of the corrected transformer oil with the calibration curve of the oil sample at the factory, and obtaining the actual concentration of each component of the gas in the transformer oil.
  • the method for online monitoring the gas in the transformer oil as described above is characterized in that: the standard gas detection program is: opening a standard gas control valve, the standard gas is directly connected to the detection module, and after separating the components through the column separator, using the semiconductor
  • the gas sensor samples the response voltage of the transformer oil and gas, and the sampling signal passes through the peak identification module to perform voltage peaks corresponding to each gas of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas and acetylene gas. recording.
  • the method for online monitoring the gas in the transformer oil as described above is characterized in that: the standard gas correction coefficient is calculated by: using the same standard gas, the factory-calibrated gas voltage peak data of each component and the field application conditions Component gas voltage peak number According to, the correction coefficient for producing different component gases is automatically calculated, and the calculation formula is expressed as:
  • FIG. 1 is a system block diagram of an on-line gas monitoring device for a transformer oil having a gas sensor automatic correction function according to an embodiment of the present invention.
  • FIGS. 2(a) to 2(0) are schematic diagrams showing an implementation of an automatic correction algorithm for a gas online monitoring device in a transformer oil with a gas sensor automatic correction function according to an embodiment of the present invention.
  • Specific embodiments of the present invention are described in detail below.
  • the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific algorithms are given, but the scope of protection of the present invention is not limited to the following. The embodiments described.
  • this embodiment includes:
  • the detecting part, the control collecting module and the management analyzing module comprises an oil and gas separation module, a carrier gas control module, an automatic correction module and a detection module
  • the control acquisition module comprises a control unit and an acquisition conversion unit
  • the management analysis comprises a data management unit, a data analysis unit, a data correction unit and a peak identification unit, wherein the oil and gas separation module receives the input of the transformer oil sample, and after the quantitative oil inlet unit and the degassing unit, the output of the oil separation module and the automatic correction module
  • the sample gas port is connected via a "sample gas control valve" and outputs a separation gas.
  • the calibration gas port of the automatic calibration module is connected to the standard gas through the "standard gas control valve".
  • the output of the automatic calibration module and the output of the carrier gas control module are connected to the detection module. After the components are separated by the injector and the column, the The semiconductor gas sensor is pre-gas tested.
  • the output end of the detection module is connected with the acquisition conversion unit, and the control unit of the control acquisition module controls the oil separation module, the automatic correction module, the carrier gas control module, and the detection module, and controls the start and stop of the acquisition conversion unit.
  • the output end of the acquisition and conversion unit of the control acquisition module is connected with the management analysis module, and after receiving the data of the acquisition conversion unit, the management analysis module outputs the analysis result through the peak identification unit, the data correction unit, the data management unit and the data analysis unit, and transmits the result. To the user.
  • the automatic calibration module comprises: a sample gas control valve, a standard gas, a standard gas control valve, and a three-way injection unit.
  • the carrier gas control module comprises: a nitrogen gas cylinder and a carrier gas control valve.
  • the detection module comprises: a thermostatic unit, an injector, a column separator, a semiconductor gas sensor, wherein the injector is connected to an output of the automatic calibration module and a carrier gas output, and the output of the injector is The chromatographic separator is connected, and the chromatographic separation output is connected to the input of the semiconductor gas sensor, and the analog signal generated by the detection is output to the input of the acquisition and conversion unit of the control acquisition module.
  • the control acquisition module includes a control unit and an acquisition conversion unit.
  • the acquisition conversion unit comprises: a signal conversion circuit and an AD sampling circuit.
  • the analog signal is converted by a signal conversion circuit, and then sampled by an AD converter and transmitted to a management analysis module.
  • the control unit is composed of a digital processor, and controls the oil and gas separation module, the automatic correction module, the carrier gas control module, the constant temperature module and the detection module by monitoring the carrier gas pressure, temperature, and oil and gas separation state.
  • the gas on-line monitoring device in the transformer oil can separately complete the degassing of the dissolved gas in the transformer oil sample, the separation, detection and peak identification of the gas of each component of the standard gas at different times according to the requirements of the instruction.
  • the control system receives the "detection of dissolved gas concentration in oil" command, the sample gas injection solenoid valve is opened, the standard gas control solenoid valve is closed, and the three-way injection tube receives the mixed gas after degassing the oil and gas separation device, and outputs the gas to the six-way Valve injector and column separator for component separation.
  • the sample gas injection solenoid valve When the control system receives the "standard gas concentration detection" command, the sample gas injection solenoid valve remains closed, the standard gas control solenoid valve opens, and the standard gas passes through the three-way injection tube and the six-way valve injector to enter the column separation. The components are separated, and the separated gas is subjected to peak detection and peak identification in the detector and control system.
  • the automatic correction module realizes the reaction characteristics of the sensor to each component gas, and linearly corrects the characteristic drift of the sensor, thereby reducing or even eliminating the shadow caused by the drift of the characteristic of the sensor. ring.
  • the automatic correction module and the automatic correction algorithm of the detection system described in this embodiment are implemented by the following steps:
  • the first step, the system calibration of the system is to use the calibration method of calibration oil sample and standard gas double calibration.
  • the system separates the oil from the calibration oil sample.
  • the sample gas passes through the automatic calibration module to open the “sample gas control valve”.
  • the response voltage value of the transformer oil and gas is sampled by the semiconductor gas sensor.
  • the sampled signal is subjected to a peak identification module to record voltage peaks in response to each of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas, and acetylene gas.
  • the management analysis module stores voltage peak and concentration value corresponding algorithms for oil samples of different concentrations.
  • the system uses the standard gas to measure in the detection module to obtain the factory calibration coefficient, open the "standard gas control valve", the standard gas is directly connected to the detection module, and the component separation is performed through the column separator.
  • the response voltage value of the transformer oil and gas is sampled by using a semiconductor gas sensor.
  • the sampled signal is recorded by a peak identification module to record voltage peaks for each gas of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas, and acetylene gas.
  • the management analysis module stores the multi-component voltage peaks of the standard gas.
  • the third step in the field application, if the working time is long or the sensor characteristics drift, the system starts the automatic calibration procedure automatically or manually.
  • the automatic calibration procedure opens the "standard gas control valve", opens the multi-component standard gas, and repeats the standard gas detection procedure of the second step.
  • the voltage peaks for the same standard gas are compared with the voltage peaks of the second step to automatically generate correction coefficients for the different component gases.
  • the correction formula is expressed as: Wherein, it indicates the peak height detection value of the ith component of the gas in the field oil, yi indicates the corrected peak height value of the ith gas, and J 0) indicates the factory of the ith component gas in the standard gas under the factory calibration section.
  • the peak height is detected, and Ji(t) represents the peak height value of the i-th component gas of the standard gas in the field application.
  • the correction factor can also be achieved by a piecewise linear fitting algorithm that accurately corrects the entire characteristic curve of the sensor.

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Abstract

A method and device for monitoring a gas in transformer oil online. According to the method, delivery calibration is performed on a standard oil sample through a delivery test, delivery calibration data of a specific standard gas is recorded, and a standard gas correction coefficient is generated, and a drift of a gas detector is corrected and reduced by comparing and correcting an onsite chromatographic peak height test of a same standard gas with a delivery record. The present invention can improve the stability of an online monitoring system for a gas in the transformer oil, and ensures secure and stable operation of a transformer.

Description

一种在线监測变压器油中气体的方法及装置 技术领域 本发明涉及的是变电站状态监控技术领域，尤其涉及在线监测变 压器油中气体的方法及装置。 背景技术 在供电系统中， 变压器油中气体在线监测技术得到了广泛、有效 的应用。目前的变压器油中气体在线监测系统主要以单色谱柱方式进 行气体分离， 再通过半导体气敏检测器进行气体检测。其半导体气敏 传感器存在特性漂移严重、 稳定性不高、 挑选困难等缺点。  FIELD OF THE INVENTION The present invention relates to the field of substation condition monitoring technologies, and more particularly to a method and apparatus for online monitoring of gas in a transformer oil. BACKGROUND OF THE INVENTION In power supply systems, gas online monitoring technology in transformer oil has been widely and effectively applied. At present, the gas on-line monitoring system in transformer oil mainly performs gas separation by a single column, and then gas detection by a semiconductor gas sensor. Its semiconductor gas sensor has shortcomings such as severe characteristic drift, low stability, and difficulty in selection.
经过对现有技术的检索发现， 中 国专利 申请号为 After searching the prior art, the Chinese patent application number is
CN200910054895.6, 授权公开号 CN101629934A, 记载了一种 "变压 器油色谱在线监测系统"，该技术利用标准气体进行装置的标定记录， 通过最小二乘法的曲线拟合算法完成标定曲线， 并导入计算机。通过 检测变压器油分离后气体成分比对标定曲线计算油中气体含量。此方 法采用标准气体标定法， 忽略油气分离的不确定性和稳定性差特定， 难以取得很好的检测结果。另一方面， 该方法忽略了气体检测器的漂 移问题， 无法通过现场进行检测器的校正， 提高油中气体的测量准确 性。 发明内容 针对背景技术的不足，本发明提供一种具有气体传感器自动校正 功能的变压器油中气体在线监测系统。本发明通过出厂试验进行标准 油样的出厂标定， 并记录特定标气传感器出厂记录， 通过现场同种标 准气体的峰高测试与出厂记录进行对比和校正，修正和减小气体检测 器特性漂移。 本发明对提高变压器油中气体在线监测系统长期稳定 性， 保证变压器安全、 稳定运行具有深远的意义。 CN200910054895.6, Authorization Publication No. CN101629934A, describes a "transformer oil chromatography on-line monitoring system" which uses a standard gas to perform calibration recording of a device, completes a calibration curve by a curve fitting algorithm of least squares method, and imports it into a computer. The gas content in the oil is calculated by detecting the gas composition ratio after the separation of the transformer oil. This method uses the standard gas calibration method, ignoring the uncertainty of the oil and gas separation and the stability difference, it is difficult to obtain good detection results. On the other hand, this method ignores the drift problem of the gas detector, and cannot perform the calibration of the detector in the field to improve the measurement accuracy of the gas in the oil. SUMMARY OF THE INVENTION In view of the deficiencies of the prior art, the present invention provides an online gas monitoring system for a transformer oil having a gas sensor automatic correction function. The invention carries out the factory calibration of the standard oil sample through the factory test, and records the factory record of the specific standard gas sensor, compares and corrects the peak height test and the factory record of the same standard gas on the site, and corrects and reduces the characteristic drift of the gas detector. The invention has far-reaching significance for improving the long-term stability of the gas on-line monitoring system in the transformer oil and ensuring the safe and stable operation of the transformer.
本发明的技术方案是： 一种在线监测变压器油中气体的装置， 包括： 油气分离模块、 自动校正模块、 载气控制模块、 检测模块、控 制采集模块和管理分析模块，  The technical solution of the present invention is: a device for online monitoring of gas in a transformer oil, comprising: an oil and gas separation module, an automatic calibration module, a carrier gas control module, a detection module, a control acquisition module, and a management analysis module,
所述的油气分离模块包括定量进油单元、 脱气单元；  The oil and gas separation module comprises a quantitative oil inlet unit and a degassing unit;
所述的自动校正模块包括标准气体、样气控制阀、标气控制阀和 三通进样管；  The automatic calibration module comprises a standard gas, a sample gas control valve, a standard gas control valve and a three-way injection tube;
所述的载气控制模块包括氮气气瓶、 载气控制阀；  The carrier gas control module comprises a nitrogen gas cylinder and a carrier gas control valve;
所述的检测模块包括进样器、色谱柱分离器、气敏检测器和恒温 单元；  The detection module includes an injector, a column separator, a gas sensor, and a thermostat unit;
所述的控制采集模块包括控制单元和采集转换单元，控制模块对 油气分离单元、 自动校正模块、 载气控制模块、 检测模块进行控制， 并控制采集转换模块的启动和停止，控制采集模块的采集转换模块的 输出端与数据管理层连接；  The control acquisition module comprises a control unit and an acquisition conversion unit, and the control module controls the oil separation unit, the automatic correction module, the carrier gas control module and the detection module, and controls the start and stop of the acquisition conversion module to control the collection of the acquisition module. The output of the conversion module is connected to the data management layer;
所述的管理分析模块包括数据管理单元、数据分析单元和数据修 正单元和谱峰识别单元； 管理分析模块接收采集转换的数据后， 经过 谱峰识别单元、数据修正单元、数据管理单元和数据分析单元输出分 析结果， 并传输给用户； The management analysis module includes a data management unit, a data analysis unit, and a data correction unit and a peak identification unit. After receiving the converted data, the management analysis module passes the The peak identification unit, the data correction unit, the data management unit, and the data analysis unit output the analysis result and transmit the result to the user;
其特征在于： 所述油气分离模块接收变压器油样的输入， 经过定 量进油单元和脱气单元后，油气分离模块的输出与自动校正模块的样 气端口经过 "样气控制阀"连接， 并输出分离气体； 所述自动校正模 块的标气端口经过 "标气控制阀 "与标准气体连接， 自动校正模块的 输出、 载气控制模块的输出与检测模块连接， 经过进样器、 色谱柱分 离器进行组分分离后， 经过气敏检测器检测， 检测模块的输出端与采 集转换模块连接。  The oil and gas separation module receives the input of the transformer oil sample, and after the quantitative oil inlet unit and the degassing unit, the output of the oil separation module and the sample gas port of the automatic calibration module are connected through the “sample gas control valve”, and The separation gas is output; the calibration gas port of the automatic calibration module is connected to the standard gas through the "standard gas control valve", and the output of the automatic calibration module and the output of the carrier gas control module are connected with the detection module, and are separated by the injector and the column. After the components are separated, they are detected by a gas sensitive detector, and the output end of the detection module is connected to the acquisition conversion module.
如上所述的在线监测变压器油中气体的装置， 其特征在于： 所述 的自动校正模块包括： 样气控制阀、 标准气体、 标气控制阀、 三通进 样单元。  The apparatus for online monitoring of gas in a transformer oil as described above is characterized in that: the automatic correction module comprises: a sample gas control valve, a standard gas, a standard gas control valve, and a three-way sampling unit.
如上所述的在线监测变压器油中气体的装置， 其特征在于： 所述 检测模块包括： 恒温单元、 进样器、 色谱柱分离器、 半导体气敏检测 器， 其中， 恒温单元用于温度控制， 进样器与自动校正模块的输出端 和载气输出端连接， 进样器的输出端与色谱分离器连接， 色谱分离器 输出端与半导体气敏检测器输入端连接，将检测所产生的模拟信号输 出至控制采集模块的控制采集模块的采集转换单元。  The device for monitoring the gas in the transformer oil on-line as described above is characterized in that: the detection module comprises: a thermostat unit, an injector, a column separator, a semiconductor gas sensor, wherein the thermostat unit is used for temperature control, The injector is connected to the output of the automatic calibration module and the carrier gas output, the output of the injector is connected to the chromatographic separator, and the output of the chromatographic separator is connected to the input of the semiconductor gas sensor, which will detect the generated simulation. The signal is output to the acquisition and conversion unit of the control acquisition module that controls the acquisition module.
如上所述的在线监测变压器油中气体的装置， 其特征在于： 所述 的采集转换单元包括： 信号变换电路和 AD采样电路， 采集转换单元 将模拟信号通过信号变换电路进行信号转换，再通过 AD转换器进行 信号采样， 并传输到管理分析模块。 如上所述的在线监测变压器油中气体的装置， 其特征在于： 所述 的控制单元由数字处理器构成， 通过监控系统的载气压力、 温度、油 气分离状态， 进行油气分离模块、 自动校正模块、 载气控制模块、检 测模块的控制。 The device for monitoring the gas in the transformer oil on-line as described above is characterized in that: the acquisition conversion unit comprises: a signal conversion circuit and an AD sampling circuit, and the acquisition conversion unit converts the analog signal through the signal conversion circuit, and then passes the AD. The converter samples the signal and transmits it to the management analysis module. The device for monitoring the gas in the transformer oil on-line as described above is characterized in that: the control unit is composed of a digital processor, and the oil and gas separation module and the automatic correction module are performed by monitoring the carrier gas pressure, temperature, and oil and gas separation state of the system. , control of carrier gas control module and detection module.
一种在线监测变压器油中气体的方法，其特征在于包括出厂标定 环节和现场应用环节两个部分。 出厂标定环节包括以下步骤： 步骤 一、 在变压器系统组装测试完毕后， 进行系统重复性测试。  A method for online monitoring of gas in a transformer oil, characterized by comprising a factory calibration link and a field application link. The factory calibration process includes the following steps: Step 1. After the transformer system assembly test is completed, perform system repeatability test.
步骤二、 系统重复性测试合格后， 进行系统出厂标定环节。 首先 进行油样标定环节的试验，得到多种浓度标准油样的不同组分气体的 电压峰值， 生成油样标定曲线。  Step 2: After the system repeatability test is passed, the system calibration step is performed. First, the oil sample calibration test is carried out to obtain the voltage peaks of different component gases of various concentration standard oil samples, and the oil sample calibration curve is generated.
步骤三、 油样标定环节完成后， 进行标准气体的标定试验。进行 一种多组分标准气体的检测程序，得到特定标准气体不同组分的电压 峰值， 作为标准气体的出厂标定数据。  Step 3: After the calibration of the oil sample is completed, the calibration test of the standard gas is performed. A multi-component standard gas detection procedure is performed to obtain voltage peaks for different components of a particular standard gas as factory calibration data for the standard gas.
步骤四、将标准气体的出厂标定数据作为分子， 将后续标准气体 的各组分气体电压峰值数据作为分母，计算生成各组标准气体校正系 数 （出厂时校正系数为 1 )。  Step 4: Using the factory calibration data of the standard gas as a numerator, and using the peak gas data of each component of the subsequent standard gas as a denominator, calculate and calculate the calibration coefficient of each group of standard gases (the correction coefficient is 1 at the factory).
现场应用环节包括以下步骤：  The field application link includes the following steps:
步骤一、在现场应用场合， 如果工作时间长或传感器特性发生漂 移， 采用自动或手动方式启动自动校正程序： 自动校正程序开通"标 气控制阀"， 打开与出厂标定环节相同的标准气体， 进行一种多组分 标准气体的标定试验， 得到特定标准气体不同组分的电压峰值， 作为 标准气体的现场应用数据。 步骤二、将标准气体的出厂标定数据作为分子， 将现场应用的各 组分气体电压峰值数据作为分母，重新计算生成各组分气体的校正系 数。如果受传感器污染或老化影响， 产生性能衰减现象， 则校正系数 大于 1 ; 如果响应放大， 则校正系数小于 1 ; 如果基本不变， 保持稳 定， 则近似等于 1。 Step 1. In the field application, if the working time is long or the sensor characteristics drift, the automatic calibration procedure is started automatically or manually: The automatic calibration procedure opens the "standard gas control valve", and opens the same standard gas as the factory calibration link. A calibration test of a multi-component standard gas to obtain voltage peaks of different components of a specific standard gas as field application data of a standard gas. Step 2: Using the factory calibration data of the standard gas as a numerator, the peak value data of each component gas voltage applied in the field is used as a denominator, and the correction coefficient for generating each component gas is recalculated. If the performance is attenuated by sensor contamination or aging, the correction factor is greater than 1; if the response is amplified, the correction factor is less than 1; if it is basically unchanged, it remains approximately equal to 1.
步骤三、现场标准气体校正环节结束后， 进行实际变压器油中气 体浓度的检测， 得到变压器油中气体的各组分气体浓度。  Step 3: After the end of the standard gas calibration step, the gas concentration in the actual transformer oil is detected, and the gas concentration of each component of the gas in the transformer oil is obtained.
步骤四、将变压器油中气体的各组分气体浓度数据乘以现场应用 条件下的校正系数，得到校正后变压器油中气体的各组分气体浓度数 据。  Step 4: Multiply the gas concentration data of each component of the gas in the transformer oil by the correction coefficient under the field application condition to obtain the gas concentration data of each component of the gas in the transformer oil after the calibration.
步骤五、将校正后变压器油中气体的各组分气体浓度数据与出厂 时的油样标定曲线进行比对，得到变压器油中气体的各组分实际浓度 Step 5: Comparing the gas concentration data of each component of the corrected transformer oil with the calibration curve of the oil sample at the factory, and obtaining the actual concentration of each component of the gas in the transformer oil.
(单位 - ppm) o (unit - ppm) o
如上所述的在线监测变压器油中气体的方法， 其特征在于： 标准 气体检测程序为： 开通标气控制阀， 标准气体直接接入检测模块，经 过色谱柱分离器进行组分分离后，利用半导体气敏传感器对变压器油 气的响应电压值进行采样，采样信号经过谱峰识别模块，对氢气气体、 一氧化碳气体、 甲垸气体、 乙烯气体、 乙垸气体和乙炔气体每一种气 体响应的电压峰值进行记录。  The method for online monitoring the gas in the transformer oil as described above is characterized in that: the standard gas detection program is: opening a standard gas control valve, the standard gas is directly connected to the detection module, and after separating the components through the column separator, using the semiconductor The gas sensor samples the response voltage of the transformer oil and gas, and the sampling signal passes through the peak identification module to perform voltage peaks corresponding to each gas of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas and acetylene gas. recording.
如上所述的在线监测变压器油中气体的方法， 其特征在于： 所述 的标准气体校正系数的计算方法为：利用相同标准气体的出厂标定的 各组分气体电压峰值数据和现场应用条件下各组分气体电压峰值数 据， 自动计算生产不同组分气体的校正系数， 计算公式表述为: The method for online monitoring the gas in the transformer oil as described above is characterized in that: the standard gas correction coefficient is calculated by: using the same standard gas, the factory-calibrated gas voltage peak data of each component and the field application conditions Component gas voltage peak number According to, the correction coefficient for producing different component gases is automatically calculated, and the calculation formula is expressed as:
其中， 表示现场油中气体第 i组分的峰高检测值， yi表示第 i 种气体的校正后的峰高值， J 0)表示出厂标定环节下标准气体中第 i 种组分气体的出厂检测峰高， J t)表示 t时刻现场应用环节下标准气 体第 i种组分气体的峰高值。 Wherein, it indicates the peak height detection value of the ith component of the gas in the field oil, yi indicates the corrected peak height value of the ith gas, and J 0) indicates the factory of the ith component gas in the standard gas under the factory calibration section. The peak height is detected, and J t) represents the peak height value of the i-th component gas of the standard gas in the field application at time t.
本发明的有益效果是：  The beneficial effects of the invention are:
本发明沿用了标油标定法和标气标定法的优点， 采用标油标定 / 标气校正的自动校正新方法，在原有标准油样标定方法的基础上使用 标准气体自动校正方法，有效校正由气体检测器和色谱柱等引起的气 体检测性能漂移和衰减。本发明只增加数个电磁阀和标准气体， 在原 有进样器和色谱柱基础上， 对检测器特性进行校正， 有效的提高了系 统的长期稳定性和检测准确度，克服了气体检测器长时间使用易产生 特性漂移和衰减等缺点，减小半导体气敏检测器长时间稳定性差的影 响， 使变压器在线监测更加安全可靠。 附图说明 图 1是本发明实施例的具有气体传感器自动校正功能的变压器 油中气体在线监测装置的系统方框图。  The invention follows the advantages of the standard oil calibration method and the standard gas calibration method, adopts a new automatic calibration method for standard oil calibration/standard gas calibration, and uses the standard gas automatic calibration method based on the original standard oil sample calibration method, and effectively corrects Gas detection performance drift and attenuation caused by gas detectors and columns. The invention only adds a plurality of solenoid valves and standard gases, and corrects the characteristics of the detector based on the original injector and the column, effectively improving the long-term stability and detection accuracy of the system, and overcoming the length of the gas detector. Time use is prone to characteristic drift and attenuation, which reduces the long-term stability of the semiconductor gas sensor and makes the online monitoring of the transformer safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system block diagram of an on-line gas monitoring device for a transformer oil having a gas sensor automatic correction function according to an embodiment of the present invention.
图 2 (a) 至图 2 (0 是本发明实施例的具有气体传感器自动校 正功能的变压器油中气体在线监测装置的自动校正算法实现示意图。 具体实肺式 下面对本发明的实施例作详细说明：本实施例在以本发明技术方 案为前提下进行实施， 给出了详细的实施方式和具体的算法， 但本发 明的保护范围不限于下述的实施例。 2(a) to 2(0) are schematic diagrams showing an implementation of an automatic correction algorithm for a gas online monitoring device in a transformer oil with a gas sensor automatic correction function according to an embodiment of the present invention. Specific embodiments of the present invention are described in detail below. The present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific algorithms are given, but the scope of protection of the present invention is not limited to the following. The embodiments described.
如图 1所示， 本实施例包括：  As shown in FIG. 1, this embodiment includes:
检测部分、控制采集模块和管理分析模块， 所述的检测部分包括 油气分离模块、 载气控制模块、 自动校正模块和检测模块， 所述控制 采集模块包括控制单元和采集转换单元，所述管理分析模块包括数据 管理单元、 数据分析单元、 数据修正单元和谱峰识别单元， 其中油气 分离模块接收变压器油样的输入， 经过定量进油单元和脱气单元后， 油气分离模块的输出与自动校正模块的样气端口经过 "样气控制阀" 连接，并输出分离气体。 自动校正模块的标气端口经过"标气控制阀" 与标准气体连接， 自动校正模块的输出、载气控制模块的输出与检测 模块连接， 经过进样器、 色谱柱进行组分分离后， 经过半导体气敏检 测器事先气体检测。检测模块的输出端与采集转换单元连接， 控制采 集模块的控制单元对油气分离模块、 自动校正模块、 载气控制模块、 检测模块进行控制， 并控制采集转换单元的启动和停止。控制采集模 块的采集转换单元的输出端与管理分析模块连接，管理分析模块接收 采集转换单元的数据后， 经过谱峰识别单元、 数据修正单元、 数据管 理单元和数据分析单元输出分析结果， 并传输给用户。  The detecting part, the control collecting module and the management analyzing module, the detecting part comprises an oil and gas separation module, a carrier gas control module, an automatic correction module and a detection module, the control acquisition module comprises a control unit and an acquisition conversion unit, and the management analysis The module comprises a data management unit, a data analysis unit, a data correction unit and a peak identification unit, wherein the oil and gas separation module receives the input of the transformer oil sample, and after the quantitative oil inlet unit and the degassing unit, the output of the oil separation module and the automatic correction module The sample gas port is connected via a "sample gas control valve" and outputs a separation gas. The calibration gas port of the automatic calibration module is connected to the standard gas through the "standard gas control valve". The output of the automatic calibration module and the output of the carrier gas control module are connected to the detection module. After the components are separated by the injector and the column, the The semiconductor gas sensor is pre-gas tested. The output end of the detection module is connected with the acquisition conversion unit, and the control unit of the control acquisition module controls the oil separation module, the automatic correction module, the carrier gas control module, and the detection module, and controls the start and stop of the acquisition conversion unit. The output end of the acquisition and conversion unit of the control acquisition module is connected with the management analysis module, and after receiving the data of the acquisition conversion unit, the management analysis module outputs the analysis result through the peak identification unit, the data correction unit, the data management unit and the data analysis unit, and transmits the result. To the user.
所述的自动校正模块包括：样气控制阀、标准气体、标气控制阀、 三通进样单元。 所述载气控制模块包括： 氮气气瓶、 载气控制阀。 所述检测模块包括： 恒温单元、 进样器、 色谱柱分离器、 半导体 气敏检测器， 其中， 进样器与自动校正模块的输出端和载气输出端连 接， 进样器的输出端与色谱分离器连接， 色谱分离输出端与半导体气 敏检测器输入端连接，将检测所产生的模拟信号输出至控制采集模块 的采集转换单元输入端。 The automatic calibration module comprises: a sample gas control valve, a standard gas, a standard gas control valve, and a three-way injection unit. The carrier gas control module comprises: a nitrogen gas cylinder and a carrier gas control valve. The detection module comprises: a thermostatic unit, an injector, a column separator, a semiconductor gas sensor, wherein the injector is connected to an output of the automatic calibration module and a carrier gas output, and the output of the injector is The chromatographic separator is connected, and the chromatographic separation output is connected to the input of the semiconductor gas sensor, and the analog signal generated by the detection is output to the input of the acquisition and conversion unit of the control acquisition module.
所述的控制采集模块包括控制单元和采集转换单元。所述的采集 转换单元包括： 信号变换电路和 AD采样电路。将模拟信号通过信号 变换电路进行信号转换， 再通过 AD转换器进行信号采样， 并传输到 管理分析模块。所述的控制单元由数字处理器构成， 通过监控系统的 载气压力、温度、油气分离状态，进行油气分离模块、 自动校正模块、 载气控制模块、 恒温模块和检测模块的控制。  The control acquisition module includes a control unit and an acquisition conversion unit. The acquisition conversion unit comprises: a signal conversion circuit and an AD sampling circuit. The analog signal is converted by a signal conversion circuit, and then sampled by an AD converter and transmitted to a management analysis module. The control unit is composed of a digital processor, and controls the oil and gas separation module, the automatic correction module, the carrier gas control module, the constant temperature module and the detection module by monitoring the carrier gas pressure, temperature, and oil and gas separation state.
变压器油中气体在线监测装置在不同时刻根据指令要求可分别 完成对变压器油样中溶解气体的脱气、 标准气体的各组分气体的分 离、 检测和谱峰识别。 当控制系统接收到 "油中溶解气体浓度检测" 命令后， 打开样气进样电磁阀， 关闭标气控制电磁阀， 三通进样管接 收油气分离装置脱气后混合气体，输出到六通阀进样器和色谱柱分离 器，实现组分分离。当控制系统接收到"标准气体浓度检测"命令后， 样气进样电磁阀保持关闭， 标气控制电磁阀打开， 标准气体通过三通 进样管和六通阀进样器， 进入色谱柱分离器实现组分分离， 分离后气 体在检测器、 控制系统实现峰值检测和谱峰识别。  The gas on-line monitoring device in the transformer oil can separately complete the degassing of the dissolved gas in the transformer oil sample, the separation, detection and peak identification of the gas of each component of the standard gas at different times according to the requirements of the instruction. When the control system receives the "detection of dissolved gas concentration in oil" command, the sample gas injection solenoid valve is opened, the standard gas control solenoid valve is closed, and the three-way injection tube receives the mixed gas after degassing the oil and gas separation device, and outputs the gas to the six-way Valve injector and column separator for component separation. When the control system receives the "standard gas concentration detection" command, the sample gas injection solenoid valve remains closed, the standard gas control solenoid valve opens, and the standard gas passes through the three-way injection tube and the six-way valve injector to enter the column separation. The components are separated, and the separated gas is subjected to peak detection and peak identification in the detector and control system.
所述的自动校正模块实现传感器对各组分气体的反应特性，通过 线性校正传感器的特性漂移，减小甚至消除传感器特性漂移造成的影 响。 The automatic correction module realizes the reaction characteristics of the sensor to each component gas, and linearly corrects the characteristic drift of the sensor, thereby reducing or even eliminating the shadow caused by the drift of the characteristic of the sensor. ring.
如图 2 ( a) 至图 2 (f) 所示， 本实施例所述的检测系统的自动 校正模块及自动校正算法通过以下步骤进行实现：  As shown in Fig. 2 (a) to Fig. 2 (f), the automatic correction module and the automatic correction algorithm of the detection system described in this embodiment are implemented by the following steps:
第一步、系统出厂标定采用标定油样和标准气体双重标定校正方 法。 系统对标定油样进行油气分离， 分离后样气通过自动校正模块， 开通 "样气控制阀"， 经过色谱柱进行组分分离后， 利用半导体气敏 传感器对变压器油气的响应电压值进行采样。采样信号经过谱峰识别 模块， 对氢气气体、 一氧化碳气体、 甲垸气体、 乙烯气体、 乙垸气体 和乙炔气体每一种气体响应的电压峰值进行记录。管理分析模块将不 同浓度油样的电压峰值与浓度值对应算法进行存储。  The first step, the system calibration of the system is to use the calibration method of calibration oil sample and standard gas double calibration. The system separates the oil from the calibration oil sample. After separation, the sample gas passes through the automatic calibration module to open the “sample gas control valve”. After the components are separated by the chromatographic column, the response voltage value of the transformer oil and gas is sampled by the semiconductor gas sensor. The sampled signal is subjected to a peak identification module to record voltage peaks in response to each of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas, and acetylene gas. The management analysis module stores voltage peak and concentration value corresponding algorithms for oil samples of different concentrations.
第二步、系统在标定过程中，利用标准气体在检测模块进行测量， 以得到出厂校正系数， 开通 "标气控制阀"， 标准气体直接接入检测 模块， 经过色谱柱分离器进行组分分离后， 利用半导体气敏传感器对 变压器油气的响应电压值进行采样。 采样信号经过谱峰识别模块，对 氢气气体、一氧化碳气体、 甲垸气体、 乙烯气体、 乙垸气体和乙炔气 体每一种气体响应的电压峰值进行记录。管理分析模块将标准气体的 多组分电压峰值进行存储。  In the second step, during the calibration process, the system uses the standard gas to measure in the detection module to obtain the factory calibration coefficient, open the "standard gas control valve", the standard gas is directly connected to the detection module, and the component separation is performed through the column separator. After that, the response voltage value of the transformer oil and gas is sampled by using a semiconductor gas sensor. The sampled signal is recorded by a peak identification module to record voltage peaks for each gas of hydrogen gas, carbon monoxide gas, formazan gas, ethylene gas, acetamethylene gas, and acetylene gas. The management analysis module stores the multi-component voltage peaks of the standard gas.
第三步、在现场应用场合， 如果工作时间长或传感器特性发生漂 移， 系统采用自动或手动方式启动自动校正程序。 自动校正程序开通 "标气控制阀"， 打开与多组分标准气体， 重复第二步的标准气体检 测程序。 针对相同标准气体的电压峰值与第二步的电压峰值进行对 比， 自动产生不同组分气体的校正系数。 校正公式表述为： 其中， 表示现场油中气体第 i组分的峰高检测值， yi表示第 i 种气体的校正后的峰高值， J 0)表示出厂标定环节下标准气体中第 i 种组分气体的出厂检测峰高， Ji(t)表示现场应用环节下标准气体第 i 种组分气体的峰高值。 The third step, in the field application, if the working time is long or the sensor characteristics drift, the system starts the automatic calibration procedure automatically or manually. The automatic calibration procedure opens the "standard gas control valve", opens the multi-component standard gas, and repeats the standard gas detection procedure of the second step. The voltage peaks for the same standard gas are compared with the voltage peaks of the second step to automatically generate correction coefficients for the different component gases. The correction formula is expressed as: Wherein, it indicates the peak height detection value of the ith component of the gas in the field oil, yi indicates the corrected peak height value of the ith gas, and J 0) indicates the factory of the ith component gas in the standard gas under the factory calibration section. The peak height is detected, and Ji(t) represents the peak height value of the i-th component gas of the standard gas in the field application.
校正系数也可以采用分段线性拟合算法，实现对传感器整个特性 曲线的精确校正。  The correction factor can also be achieved by a piecewise linear fitting algorithm that accurately corrects the entire characteristic curve of the sensor.
以上仅为本发明的实施例而已， 并不用于限制本发明， 因此，凡 在本发明的精神和原则之内， 所做的任何修改、 等同替换、 改进等， 均应包含在本发明的权利要求范围之内。  The above are only the embodiments of the present invention, and are not intended to limit the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of the request.

Claims

1、 一种在线监测变压器油中气体的装置， 包括： 油气分离模块、 自动校正模块、 载气控制模块、 检测模块、 控制采集模块和管理分析 模块； 1. A device for online monitoring of gas in transformer oil, including: oil and gas separation module, automatic correction module, carrier gas control module, detection module, control acquisition module and management analysis module;
所述的油气分离模块包括定量进油单元、 脱气单元； The oil and gas separation module includes a quantitative oil inlet unit and a degassing unit;
所述的自动校正模块包括标准气体、样气控制阀、标气控制阀和 三通进样管； The automatic calibration module includes standard gas, sample gas control valve, standard gas control valve and three-way sampling tube;
所述的载气控制模块包括氮气气瓶、 载气控制阀； The carrier gas control module includes a nitrogen gas cylinder and a carrier gas control valve;
所述的检测模块包括进样器、色谱柱分离器、气敏检测器和恒温 单元； The detection module includes a sample injector, a chromatographic column separator, a gas-sensitive detector and a constant temperature unit;
所述的控制采集模块包括控制单元和采集转换单元，控制模块对 油气分离单元、 自动校正模块、 载气控制模块、 检测模块进行控制， 并控制采集转换模块的启动和停止，控制采集模块的采集转换模块的 输出端与数据管理层连接； The control acquisition module includes a control unit and a collection conversion unit. The control module controls the oil and gas separation unit, the automatic correction module, the carrier gas control module, and the detection module, controls the start and stop of the collection conversion module, and controls the collection of the collection module. The output end of the conversion module is connected to the data management layer;
所述的管理分析模块包括数据管理单元、数据分析单元和数据修 正单元和谱峰识别单元； 管理分析模块接收采集转换的数据后， 经过 谱峰识别单元、数据修正单元、数据管理单元和数据分析单元输出分 析结果， 并传输给用户； The management and analysis module includes a data management unit, a data analysis unit, a data correction unit and a peak identification unit; after the management analysis module receives the collected and converted data, it passes through the peak identification unit, data correction unit, data management unit and data analysis unit. The unit outputs the analysis results and transmits them to the user;
其特征在于： 所述油气分离模块接收变压器油样的输入， 经过定 量进油单元和脱气单元后，油气分离模块的输出与自动校正模块的样 气端口经过 "样气控制阀"连接， 并输出分离气体； 所述自动校正模 块的标气端口经过 "标气控制阀 "与标准气体连接， 自动校正模块的 输出、 载气控制模块的输出与检测模块连接， 经过进样器、 色谱柱分 离器进行组分分离后， 经过气敏检测器检测， 检测模块的输出端与采 集转换模块连接。 It is characterized in that: the oil and gas separation module receives the input of the transformer oil sample. After passing through the quantitative oil inlet unit and the degassing unit, the output of the oil and gas separation module is connected to the sample gas port of the automatic calibration module through the "sample gas control valve", and Output the separated gas; the standard gas port of the automatic calibration module is connected to the standard gas through the "calibration gas control valve", the output of the automatic calibration module and the output of the carrier gas control module are connected to the detection module, and pass through the injector and chromatographic column separator After the components are separated by the separator, they are detected by the gas-sensitive detector, and the output end of the detection module is connected to the acquisition conversion module.
2、 如权利要求 1所述的在线监测变压器油中气体的装置， 其特 征在于： 所述的自动校正模块包括： 样气控制阀、 标准气体、 标气控 制阀、 三通进样单元。 2. The device for online monitoring of gas in transformer oil as claimed in claim 1, characterized in that: the automatic correction module includes: a sample gas control valve, a standard gas, a standard gas control valve, and a three-way sampling unit.
3、 如权利要求 1所述的在线监测变压器油中气体的装置， 其特 征在于： 所述检测模块包括： 恒温单元、 进样器、 色谱柱分离器、半 导体气敏检测器， 其中， 恒温单元用于温度控制， 进样器与自动校正 模块的输出端和载气输出端连接， 进样器的输出端与色谱分离器连 接， 色谱分离器输出端与半导体气敏检测器输入端连接， 将检测所产 生的模拟信号输出至控制采集模块的控制采集模块的采集转换单元。 3. The device for online monitoring of gas in transformer oil according to claim 1, characterized in that: the detection module includes: a constant temperature unit, a sampler, a chromatographic column separator, and a semiconductor gas-sensitive detector, wherein the constant temperature unit For temperature control, the injector is connected to the output end of the automatic calibration module and the carrier gas output end. The output end of the injector is connected to the chromatographic separator. The output end of the chromatographic separator is connected to the input end of the semiconductor gas-sensitive detector. The analog signal generated by the detection is output to the acquisition conversion unit of the control acquisition module.
4、 如权利要求 1所述的在线监测变压器油中气体的装置， 其特 征在于： 所述的采集转换单元包括： 信号变换电路和 AD采样电路， 采集转换单元将模拟信号通过信号变换电路进行信号转换， 再通过 AD转换器进行信号采样， 并传输到管理分析模块。 4. The device for online monitoring of gas in transformer oil as claimed in claim 1, characterized in that: the acquisition and conversion unit includes: a signal conversion circuit and an AD sampling circuit, and the acquisition and conversion unit converts the analog signal through the signal conversion circuit. conversion, and then the signal is sampled through the AD converter and transmitted to the management analysis module.
5、 如权利要求 1所述的在线监测变压器油中气体的装置， 其特 征在于： 所述的控制单元由数字处理器构成， 通过监控系统的载气压 力、 温度、 油气分离状态， 进行油气分离模块、 自动校正模块、 载气 控制模块、 检测模块的控制。 5. The device for online monitoring of gas in transformer oil as claimed in claim 1, characterized in that: the control unit is composed of a digital processor and performs oil and gas separation by monitoring the carrier gas pressure, temperature and oil and gas separation status of the system. module, automatic correction module, carrier gas control module, and detection module control.
6、 一种在线监测变压器油中气体的方法， 其特征在于： 包括出 厂标定环节和现场应用环节两个部分。 6. A method for online monitoring of gas in transformer oil, characterized by: including two parts: factory calibration and on-site application.
7、 如权利要求 6所述的在线监测变压器油中气体的方法， 其特 征在于： 所述的出厂标定环节包括以下步骤： 7. The method for online monitoring of gas in transformer oil as claimed in claim 6, wherein The key points are: The factory calibration process includes the following steps:
步骤一、 在变压器系统组装测试完毕后， 进行系统重复性测试； 步骤二、 系统重复性测试合格后， 进行系统出厂标定环节； 首先 进行油样标定环节的试验，得到多种浓度标准油样的不同组分气体的 电压峰值， 生成油样标定曲线； Step 1. After the transformer system assembly and testing is completed, conduct a system repeatability test; Step 2. After the system repeatability test passes, proceed to the system factory calibration process; First, conduct the oil sample calibration process to obtain a variety of concentrations of standard oil samples. The voltage peaks of different gas components are used to generate an oil sample calibration curve;
步骤三、 油样标定环节完成后， 进行标准气体的标定试验； 进行 一种多组分标准气体的检测程序，得到特定标准气体不同组分的电压 峰值， 作为标准气体的出厂标定数据； Step 3. After the oil sample calibration step is completed, perform the calibration test of the standard gas; perform a multi-component standard gas detection program to obtain the voltage peak values of different components of the specific standard gas as the factory calibration data of the standard gas;
步骤四、将标准气体的出厂标定数据作为分子， 将后续标准气体 的各组分气体电压峰值数据作为分母，计算生成各组标准气体校正系 数。 Step 4: Use the factory calibration data of the standard gas as the numerator and the gas voltage peak data of each component of the subsequent standard gas as the denominator to calculate and generate each set of standard gas correction coefficients.
8、 如权利要求 6所述的在线监测变压器油中气体的方法， 其特 征在于： 所述的现场应用环节包括以下步骤： 8. The method for online monitoring of gas in transformer oil as claimed in claim 6, characterized in that: the on-site application step includes the following steps:
步骤一、在现场应用场合， 如果工作时间长或传感器特性发生漂 移， 采用自动或手动方式启动自动校正程序： 自动校正程序开通"标 气控制阀"， 打开与出厂标定环节相同的标准气体， 进行一种多组分 标准气体的标定试验， 得到特定标准气体不同组分的电压峰值， 作为 标准气体的现场应用数据； Step 1. In field applications, if the working time is long or the sensor characteristics drift, use automatic or manual methods to start the automatic calibration program: The automatic calibration program opens the "standard gas control valve" and opens the same standard gas as the factory calibration link, and performs A calibration test of a multi-component standard gas to obtain the voltage peak values of different components of a specific standard gas as field application data of the standard gas;
步骤二、将标准气体的出厂标定数据作为分子， 将现场应用的各 组分气体电压峰值数据作为分母，重新计算生成各组分气体的校正系 数； 如果受传感器污染或老化影响， 产生性能衰减现象， 则校正系数 大于 1 ; 如果响应放大， 则校正系数小于 1 ; 如果基本不变， 保持稳 定， 则近似等于 1 ; Step 2: Use the factory calibration data of the standard gas as the numerator and the field applied voltage peak data of each component gas as the denominator to recalculate and generate the correction coefficient of each component gas; if it is affected by sensor contamination or aging, performance degradation will occur. , then the correction coefficient is greater than 1; if the response is amplified, the correction coefficient is less than 1; if it is basically unchanged, it remains stable is determined, then is approximately equal to 1;
步骤三、现场标准气体校正环节结束后， 进行实际变压器油中气 体浓度的检测， 得到变压器油中气体的各组分气体浓度； Step 3: After the on-site standard gas calibration is completed, the gas concentration in the actual transformer oil is detected to obtain the gas concentration of each component of the gas in the transformer oil;
步骤四、将变压器油中气体的各组分气体浓度数据乘以现场应用 条件下的校正系数，得到校正后变压器油中气体的各组分气体浓度数 据； Step 4: Multiply the gas concentration data of each component of the gas in the transformer oil by the correction coefficient under the field application conditions to obtain the corrected gas concentration data of each component of the gas in the transformer oil;
步骤五、将校正后变压器油中气体的各组分气体浓度数据与出厂 时的油样标定曲线进行比对， 得到变压器油中气体的各组分实际浓 度。 Step 5: Compare the corrected gas concentration data of each component of the gas in the transformer oil with the factory oil sample calibration curve to obtain the actual concentration of each component of the gas in the transformer oil.
9、 如权利要求 7所述的在线监测变压器油中气体的方法， 其特 征在于： 所述的标准气体的检测程序为： 开通标气控制阀， 标准气体 直接接入检测模块， 经过色谱柱分离器进行组分分离后， 利用半导体 气敏传感器对变压器油气的响应电压值进行采样，采样信号经过谱峰 识别模块， 对氢气气体、 一氧化碳气体、 甲垸气体、 乙烯气体、 乙垸 气体和乙炔气体每一种气体响应的电压峰值进行记录。 9. The method for online monitoring of gas in transformer oil according to claim 7, characterized in that: the detection procedure of the standard gas is: opening the standard gas control valve, the standard gas is directly connected to the detection module, and separated by a chromatographic column After component separation, a semiconductor gas sensor is used to sample the response voltage value of the transformer oil and gas. The sampling signal passes through the peak identification module to detect hydrogen gas, carbon monoxide gas, methane gas, ethylene gas, acetylene gas and acetylene gas. The voltage peak value of each gas response is recorded.
10、如权利要求 7所述的在线监测变压器油中气体的方法， 其特 征在于： 所述的标准气体校正系数的计算方法为： 利用相同标准气体 的出厂标定的各组分气体电压峰值数据和现场应用条件下各组分气 体电压峰值数据， 自动计算生产不同组分气体的校正系数， 计算公式 表述为： 10. The method for online monitoring of gas in transformer oil according to claim 7, characterized in that: the calculation method of the standard gas correction coefficient is: using the factory calibrated gas voltage peak data of each component of the same standard gas and Based on the peak voltage data of each component gas under field application conditions, the correction coefficients for producing different component gases are automatically calculated. The calculation formula is expressed as:
其中， 表示现场油中气体第 i组分的峰高检测值， yi表示第 i 种气体的校正后的峰高值， ¾0)表示出厂标定环节下标准气体中第 i 种组分气体的出厂检测峰高， Ji(t)表示 t时刻现场应用环节下标准气 体第 i种组分气体的峰高值。 Among them, represents the peak height detection value of the i-th gas component in the oil on site, and yi represents the i-th component. The corrected peak height value of the gas, ¾0) represents the factory detection peak height of the ith component gas in the standard gas under the factory calibration process, Ji(t) represents the ith component of the standard gas under the field application process at time t The peak height of the gas.
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