Test platform for detecting operation reliability of on-line monitoring device for gas content in oil of oil-filled equipment

Abstract

The invention relates to a test platform for detecting the operation reliability of an on-line monitoring device for detecting the gas content in oil of oil-filled equipment, and solves the problem that the measurement reliability is affected due to the fact that the on-line monitoring device is interfered by the environment in the prior art. The on-line monitoring device is used for monitoring the gas content in the oil of the oil filling equipment; a control module; the to-be-detected oil gas content adjusting module is connected with the control module and the online monitoring device, and the control module is used for collecting, analyzing and controlling the to-be-detected oil gas content adjusting module to be used for filling oil containing corresponding gas into oil filling equipment and simulating the gas content in the oil when the oil filling equipment actually runs; the environment adjusting module is connected with the control module and the on-line monitoring device, and the control module collects, analyzes and controls the environment adjusting module to simulate the working environment of the oil filling equipment during actual operation; the control module controls the on-line monitoring device to conduct on-line correction according to the simulation environment, the purpose of accurately monitoring the gas amount in oil of the oil filling equipment is achieved, and the monitoring reliability of the on-line monitoring device is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of online monitoring of high voltage insulation for detecting the gas content in oil of oil-filled equipment, and in particular to a test platform for the operating reliability of an online monitoring device for detecting the gas content in oil of oil-filled equipment. Background Art

[0002] The online monitoring device detects and diagnoses early failures of large oil-filled equipment by detecting the gas content in the oil of oil-filled equipment (such as oil-immersed transformers). When an oil-filled equipment fails, the insulating oil and insulating materials inside it will decompose to produce characteristic gases such as low-molecular hydrocarbons and hydrogen and dissolve in the oil. The online monitoring device detects the content of characteristic gases in the oil to promptly detect potential failures of the oil-filled equipment, so that potential failures of the oil-filled equipment can be eliminated in time, thereby ensuring that the oil-filled equipment can operate stably and safely.

[0003] From the analysis of large-scale oil-filled equipment failure cases in recent years, it was found that in the early stage of oil-filled equipment failure, the concentrations of characteristic fault gases such as acetylene and hydrogen have changed slightly. However, the online monitoring device is restricted by factors such as the detection environment, detection lower limit, and detection cycle. It is unable to capture changes in the gas content in the oil in a short period of time, and thus is unable to promptly detect the presence of latent faults in the oil-filled equipment, and is unable to promptly eliminate the latent faults of the oil-filled equipment, resulting in the oil-filled equipment being unable to operate stably and safely, affecting the stable operation of the power system.

[0004] However, the existing online monitoring device for detecting the gas content in the oil of the oil-filled equipment cannot timely perform online correction (i.e., noise reduction processing) according to various factors that cause the content change of the gas content in the oil of the oil-filled equipment in actual applications, resulting in the online monitoring device being unable to perform noise reduction processing according to the monitoring results in a timely manner. Therefore, the online monitoring device for detecting the gas content in the oil of the oil-filled equipment urgently needs to be fully upgraded and renovated. Summary of the invention

[0005] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a test platform for the operating reliability of an online monitoring device for detecting the gas content in the oil of oil-filled equipment, which is used to enable the online monitoring device to perform interference elimination processing (or noise reduction processing) in real time online, so as to accurately monitor the situation used to detect the gas content in the oil of the oil-filled equipment, and then accurately detect the early failure of the oil-filled equipment, so that the oil-filled equipment can be repaired and troubleshooted in time, ensuring the stable and safe operation of the oil-filled equipment.

[0006] The above technical objectives of the present invention are mainly solved by the following technical solutions:

[0007] A test platform for detecting the operating reliability of an online monitoring device for detecting the gas content in oil of an oil-filled device, comprising an oil-filled device, an online monitoring device for monitoring the gas content in oil of the oil-filled device, and characterized by further comprising:

[0008] Control module;

[0009] Gas content regulating module for the oil to be measured: it is connected to the control module and the online monitoring device, and the control module collects, analyzes and controls the gas content of the oil to be measured. The regulating module is used to fill the oil-filling device with the corresponding gas, so as to simulate the gas content in the oil when the oil-filling device is actually running;

[0010] Environmental adjustment module: it is connected with the control module and the online monitoring device, and the control module collects, analyzes and controls the environmental adjustment module to simulate the working environment of the oil-filled equipment during actual operation;

[0011] The control module controls the online monitoring device to perform online correction according to the simulated environment, so as to achieve the purpose of accurately monitoring the amount of gas in the oil of the oil-filled equipment and ensure the monitoring reliability of the online monitoring device.

[0012] The actual operating environment and gas content in the oil of the oil filling equipment are simulated by the oil gas content adjustment module to be tested and the environment adjustment module, so that the measurement result of the online monitoring device is the result of the actual operation of the oil filling equipment, and by changing the operating parameters of the oil gas content adjustment module to be tested and the environment adjustment module, the measurement accuracy of the online monitoring device can be corrected or the oil filling equipment fault detection can be applied in different environments, so that when the oil filling equipment is actually operating under various possible circumstances, the online monitoring device can measure accurately and ensure stability.

[0013] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

[0014] Preferably, the gas content adjustment module of the oil to be measured comprises:

[0015] Temperature-controlled oil cylinder: connected to the oil filling device, used to fill the oil filling device with oil of set temperature;

[0016] Oil discharge cylinder: connected to the oil filling device, used to discharge oil from the oil filling device;

[0017] Oxygen cylinder and nitrogen cylinder: both are connected to the temperature-controlled oil cylinder;

[0018] The control module is used to control the oxygen cylinder and the nitrogen cylinder to fill the oil containing oxygen and nitrogen into the oil filling the equipment through the temperature-controlled oil cylinder.

[0019] Due to the structure and operation mode of the oil filling equipment, oxygen and nitrogen are contained in the oil. By setting up oxygen cylinders and nitrogen cylinders, appropriate amounts of oxygen and nitrogen are filled into the oil of the oil filling equipment through the temperature-controlled oil cylinder, so as to accurately simulate the actual operation of the oil filling equipment and the oil containing the same amount of oxygen and nitrogen. This is conducive to the online measuring device to accurately measure the gas content in the oil, thereby accurately judging the possible potential failures of the oil filling equipment.

[0020] Preferably, the environment adjustment module comprises:

[0021] Atmosphere adjustment device: connected to the control module, used to adjust the concentration of the gas in the environment where the oil-filled equipment is located;

[0022] Atmosphere sensor: connected to the control module, it detects the gas concentration of the environment where the oil filling device is located, forms an atmosphere signal, and then transmits the atmosphere signal to the control module;

[0023] The control module receives and analyzes the atmosphere sensor signal and controls the atmosphere adjustment device to adjust the gas concentration in the environment where the oil-filled equipment is located.

[0024] Since the detection results of the online monitoring device are only affected by several specific gases, the atmosphere adjustment device is used to simulate the actual operating environment of the oil filling equipment to avoid measurement errors of the online measuring device caused by changes in the simulated environment. This is conducive to the online measuring device being able to accurately measure the gas content in the oil, thereby accurately judging the possible potential failures of the oil filling equipment.

[0025] Preferably, the environment adjustment module further comprises:

[0026] Constant temperature and humidity chamber: it is connected to the control module, and the oil filling device and the online monitoring device are arranged in the constant temperature and humidity chamber, so as to keep the environment where the oil filling device and the online monitoring device are located at a constant temperature and humidity;

[0027] Temperature and humidity sensor: It is connected to the control module, detects the temperature and humidity in the constant temperature and humidity chamber, forms a signal, and then transmits the signal to the control module. The control module receives and analyzes the signal to control the operation of the constant temperature and humidity chamber.

[0028] Preferably, the environment adjustment module further comprises:

[0029] Sound source interference device: connected to the control module, used to overcome the noise interference inside the constant temperature and humidity chamber;

[0030] Sound sensor: It is connected to the control module, detects the sound in the constant temperature and humidity chamber, forms a signal, and then transmits the signal to the control module. The control module receives and analyzes the signal to control the operation of the sound source interference device.

[0031] Among them, the setting of a constant temperature and humidity chamber is conducive to accurately controlling the operating conditions of the oil-filling equipment and the online monitoring device in a constant temperature and pressure environment, avoiding the influence of the temperature and humidity in the environment on the operating reliability test of the online monitoring device, and is conducive to ensuring the measurement accuracy of the online monitoring device and ensuring the correction accuracy of the online monitoring device.

[0032] The sound source interferer is installed in a constant temperature and humidity chamber and located near the online monitoring device. It is used to simulate the sound environment when the oil filling equipment and the online monitoring device are running, so as to ensure the measurement accuracy of the online monitoring device and ensure the correction accuracy of the online monitoring device.

[0033] Preferably, the environment adjustment module further comprises:

[0034] Gas circulator: It is connected to the control module and is arranged on the constant temperature and humidity chamber. The control module controls the gas circulator to circulate the gas in the constant temperature and humidity chamber to form a uniform filling. It is beneficial to the measurement accuracy of the online monitoring device and ensures the correction accuracy of the online monitoring device.

[0035] Preferably, the environment adjustment module further comprises:

[0036] Air pressure transmitter: It is connected to the control module and is installed on the constant temperature and humidity chamber. The air pressure transmitter detects the air pressure in the constant temperature and humidity chamber, forms a signal, and transmits the signal to the control module. The control module receives and analyzes the signal and controls the air pressure transmitter to work to adjust the air pressure in the constant temperature and humidity chamber. The air pressure transmitter is installed on the constant temperature and humidity chamber. Through pressure transmission, the air pressure in the constant temperature and humidity chamber is precisely controlled, thereby accurately simulating the air pressure of the actual operating environment of the oil filling equipment and the online monitoring device, which is conducive to ensuring the measurement accuracy of the online monitoring device and ensuring the correction accuracy of the online monitoring device.

[0037] Preferably, the atmosphere adjustment device includes a CO2 bottle and a SF6 bottle both connected to the control module signal, the control module receives and analyzes the data transmitted by the atmosphere sensor, and controls the CO2 bottle and the SF6 bottle to fill CO2 and SF6 into the constant temperature and humidity chamber in the environment adjustment module. The actual operating environment of the oil-filled equipment is generally only affected by CO2 and SF6. In order to truly simulate the actual operating environment of the oil-filled equipment, the CO2 bottle and the SF6 bottle are controlled by the control module to fill the constant temperature and humidity chamber with appropriate amounts of CO2 and SF6, which is conducive to ensuring the measurement accuracy of the online monitoring device and ensuring the correction accuracy of the online monitoring device.

[0038] Preferably, the atmosphere sensor includes a CO2 sensor and an SF6 sensor. The CO2 sensor and the SF6 sensor are used to determine the contents of CO2 and SF6 in the constant temperature and humidity chamber, and the contents of CO2 and SF6 are transmitted to the control module, which then analyzes the CO2 and SF6 information, compares the information with the database pre-set in the control module, and controls the CO2 bottle and the SF6 bottle to perform corresponding actions, so that the constant temperature and humidity chamber has an appropriate amount of CO2 and SF6, which is conducive to ensuring the measurement accuracy of the online monitoring device and ensuring the correction accuracy of the online monitoring device.

[0039] Preferably, the control module comprises:

[0040] Data acquisition module: connected with the oil gas content adjustment module to be measured, the environment adjustment module and the online monitoring device by signal, and used for collecting data from the oil gas content adjustment module to be measured, the environment adjustment module and the online monitoring device;

[0041] Data analysis module: receiving the data collected by the data collection module, and comparing and analyzing the collected data with the corresponding data in the database to form a control signal;

[0042] Device control module: receives control signals, controls the oil gas content control module to be measured, the environment control module and the online monitoring device to execute control signals, simulates the actual operating environment of the oil filling equipment, eliminates interference factors in the monitoring process of the online monitoring device, enables the online monitoring device to perform online corrections according to the simulated environment, and enables the online monitoring device to accurately measure the gas content in the oil of the oil filling equipment.

[0043] The beneficial effects of the present invention are as follows: accurate control of parameters such as oil temperature, oil pressure, and gas content is achieved by cooperating with the control module of the oil to be tested and the environmental adjustment module; the environmental adjustment module accurately controls the temperature, humidity, air pressure, and gas components (interference of water vapor, CO2, and SF6, especially interference with the content of CO2 and SF6) of the operating environment of the online monitoring device; the data acquisition module and the data analysis module compare and perform correlation analysis on the data submitted by the online monitoring device and the environmental data, and the device control module adjusts the operation of the oil filling equipment and the online monitoring device according to the analysis results, truly simulates the actual operating environment of the oil filling equipment and the online monitoring device, and realizes the reliability of the online monitoring device's accurate measurement of the monitoring data of dissolved gas in the oil of the oil filling equipment, and is conducive to timely modification of the online monitoring device, so that the online monitoring device can cope with the corresponding monitoring of the gas content in the oil of the oil filling equipment, which is conducive to timely elimination of hidden faults of the oil filling equipment and to ensure the normal operation of the oil filling equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the present invention.

[0045] In the figure: 1. Gas content adjustment module of the oil to be tested; 2. Environmental adjustment module; 3. Control module; 4. Oil filling equipment; 5. Oxygen cylinder; 6. Nitrogen cylinder; 7. Temperature control cylinder; 8. Oil discharge cylinder; 9. Constant temperature and humidity chamber; 10. Online monitoring device; 11. CO2 cylinder; 12. SF6 cylinder; 13. Gas circulator; 14. Sound source jammer; 15. Air pressure transmitter; 16. Humidity sensor; 17. Atmosphere sensor; 18. Data acquisition module; 19. Data router; 20. Computer; 21. Device control module. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0047] Example: Figure 1 As shown, a test platform for the operation reliability of an online monitoring device for detecting the gas content in oil of an oil-filled device comprises an oil-filled device 4, an online monitoring device 10 for monitoring the gas content in oil of the oil-filled device 4, and is characterized in that it also comprises:

[0048] Control module 3;

[0049] Gas content regulating module 1 for the oil to be measured: it is connected to the control module 3 and the online monitoring device 10, and the control module 3 collects, analyzes and controls the gas content of the oil to be measured. The regulating module 1 is used to fill the oil-filling device 4 with the corresponding gas, so as to simulate the gas content in the oil when the oil-filling device 4 is actually running;

[0050] Environmental adjustment module 2: connected to the control module 3 and the online monitoring device 10, the control module 3 collects, analyzes and controls the environmental adjustment module 2 to simulate the working environment of the oil filling device 4 during actual operation;

[0051] The control module 3 controls the online monitoring device 10 to perform online correction according to the simulated environment, so as to achieve the purpose of accurately monitoring the gas volume in the oil of the oil-filling device 4 and ensure the monitoring reliability of the online monitoring device 10.

[0052] By simulating the actual operating environment and gas content in the oil of the oil filling equipment 4 through the oil gas content adjustment module 1 to be tested and the environment adjustment module 2, the measurement result of the online monitoring device 10 is the result of the actual operation of the oil filling equipment 4, and by changing the operating parameters of the oil gas content adjustment module 1 to be tested and the environment adjustment module 2, the measurement accuracy of the online monitoring device 10 can be corrected or the oil filling equipment 4 fault detection can be applied in different environments, so that when the oil filling equipment 4 is actually operating under various possible circumstances, the online monitoring device 10 can measure accurately and ensure stability.

[0053] Among them, the online monitoring device 10 can timely discover latent faults inside the transformer and realize fault warning through online monitoring of dissolved gas in transformer oil; it can analyze the operating status and remaining service life of the transformer around the clock, and provide data information support for the safe and stable operation of the power system.

[0054] Next, the above technical solution is described:

[0055] The gas content adjustment module 1 of the oil to be measured comprises:

[0056] Temperature-controlled oil cylinder 7: connected to the oil filling device 4, used to fill the oil filling device 4 with oil of a set temperature;

[0057] Oil discharge cylinder 8: connected to the oil filling device 4, used to discharge oil from the oil filling device 4;

[0058] Oxygen cylinder 5 and nitrogen cylinder 6: both are connected to the temperature-controlled oil cylinder 7;

[0059] The control module 3 is used to control the oxygen cylinder 5 and the nitrogen cylinder 6 to fill the oil containing oxygen and nitrogen into the oil filling the equipment through the temperature-controlled oil cylinder 7.

[0060] Due to the structure and operation mode of the oil filling device 4, oxygen and nitrogen are contained in the oil. By setting up the oxygen cylinder 5 and the nitrogen cylinder 6, appropriate amounts of oxygen and nitrogen are filled into the oil of the oil filling device 4 via the temperature-controlled oil cylinder 7, so as to accurately simulate the oil containing the same amounts of oxygen and nitrogen in the actual operation process of the oil filling device 4, which is conducive to the online measuring device to accurately measure the gas content in the oil, thereby accurately judging the possible potential failure of the oil filling device 4.

[0061] In practical applications, the environment adjustment module 2 includes:

[0062] Atmosphere adjustment device: connected to the control module 3, used to adjust the concentration of the gas in the environment where the oil filling device 4 is located;

[0063] Atmosphere sensor 17: connected to the control module 3, it detects the gas concentration of the environment where the oil filling device 4 is located, forms an atmosphere signal, and then transmits the atmosphere signal to the control module 3;

[0064] The control module 3 receives and analyzes the signal from the atmosphere sensor 17 and controls the atmosphere adjustment device to adjust the gas concentration in the environment where the oil filling device 4 is located.

[0065] Since the operating environment of the oil filling equipment 4 only has a few specific gases, the actual operating environment of the oil filling equipment 4 is simulated by the atmosphere adjustment device to avoid measurement errors of the online measuring device caused by changes in the simulated environment, which is conducive to the online measuring device to accurately measure the gas content in the oil, thereby accurately judging the possible potential failure of the oil filling equipment 4.

[0066] In practical applications, the environment adjustment module 2 also includes:

[0067] Constant temperature and humidity box 9: it is connected to the control module 3, and the oil filling device 4 and the online monitoring device 10 are arranged in the constant temperature and humidity box 9, so as to keep the environment where the oil filling device 4 and the online monitoring device 10 are located at a constant temperature and humidity;

[0068] Temperature and humidity sensor 16: It is connected to the control module 3, detects the temperature and humidity in the constant temperature and humidity chamber 9, forms a signal, and then transmits the signal to the control module 3. The control module 3 receives and analyzes the signal to control the operation of the constant temperature and humidity chamber 9.

[0069] In practical applications, the environment adjustment module 2 also includes:

[0070] Sound source interference device: it is connected to the control module 3 and is used to overcome the noise interference inside the constant temperature and humidity box 9;

[0071] Sound sensor: It is connected to the control module 3, detects the sound in the constant temperature and humidity chamber 9, forms a signal, and then transmits the signal to the control module 3. The control module 3 receives and analyzes the signal to control the operation of the sound source interference device.

[0072] Among them, the setting of the constant temperature and humidity chamber 9 is conducive to accurately controlling the operating conditions of the oil filling equipment 4 and the online monitoring device 10 in a constant temperature and pressure environment, avoiding the influence of the temperature and humidity in the environment on the operating reliability test of the online monitoring device 10, and is conducive to ensuring the measurement accuracy of the online monitoring device 10 and ensuring the correction accuracy of the online monitoring device 10.

[0073] The sound source interferer 14 is installed in the constant temperature and humidity chamber 9 and is located near the online monitoring device 10. It is used to simulate the sound environment when the oil filling equipment 4 and the online monitoring device 10 are running, so as to ensure the measurement accuracy of the online monitoring device 10 and ensure the correction accuracy of the online monitoring device 10.

[0074] In practical applications, the environment adjustment module 2 also includes:

[0075] Gas circulator 13: It is connected to the control module 3 and is arranged on the constant temperature and humidity chamber 9. The control module 3 controls the gas circulator 13 to circulate the gas in the constant temperature and humidity chamber 9 to form a uniform filling. This is beneficial to the measurement accuracy of the online monitoring device 10 and ensures the correction accuracy of the online monitoring device 10.

[0076] In practical applications, the environment adjustment module 2 also includes:

[0077] Air pressure transmitter 15: It is connected to the control module 3 and is arranged on the constant temperature and humidity chamber 9. The air pressure transmitter 15 detects the air pressure in the constant temperature and humidity chamber 9, forms a signal, and transmits the signal to the control module 3. The control module 3 receives and analyzes the signal, and controls the air pressure transmitter 15 to work to adjust the air pressure in the constant temperature and humidity chamber 9. The air pressure transmitter 15 is installed on the constant temperature and humidity chamber 9, and realizes precise control of the air pressure in the constant temperature and humidity chamber 9 through pressure transmission, thereby accurately simulating the air pressure of the actual operating environment of the oil filling device 4 and the online monitoring device 10, which is conducive to ensuring the measurement accuracy of the online monitoring device 10 and ensuring the correction accuracy of the online monitoring device 10.

[0078] In actual application, the atmosphere adjustment device includes a CO2 bottle 11 and a SF6 bottle 12, both of which are connected to the control module 3 by signal. The control module 3 receives and analyzes the data transmitted by the atmosphere sensor 17, and controls the CO2 bottle 11 and the SF6 bottle 12 to fill CO2 and SF6 into the constant temperature and humidity chamber 9 in the environment adjustment module 2. In the actual operating environment of the oil filling device 4, the actual operating environment is generally only affected by CO2 and SF6. In order to truly simulate the actual operating environment of the oil filling device 4, the CO2 bottle 11 and the SF6 bottle 12 are controlled by the control module 3 to fill the constant temperature and humidity chamber 9 with appropriate amounts of CO2 and SF6, which is conducive to ensuring the measurement accuracy of the online monitoring device 10 and ensuring the correction accuracy of the online monitoring device 10.

[0079] In practical applications, the atmosphere sensor 17 includes a CO2 sensor and an SF6 sensor. Through the setting of the CO2 sensor and the SF6 sensor, the content of CO2 and SF6 in the constant temperature and humidity chamber 9 is determined, and the content information of CO2 and SF6 is transmitted to the control module 3, and then the control module 3 analyzes the CO2 and SF6 information, and compares the database pre-set in the control module 3, and controls the CO2 bottle 11 and the SF6 bottle 12 to perform corresponding actions, so that the constant temperature and humidity chamber 9 has an appropriate amount of CO2 and SF6, which is conducive to ensuring the measurement accuracy of the online monitoring device 10 and ensuring the correction accuracy of the online monitoring device 10.

[0080] In practical applications, the control module 3 includes:

[0081] Data acquisition module: it is connected with the oil gas content adjustment module 1 to be measured, the environment adjustment module 2 and the online monitoring device 10 by signal, and is used to collect data from the oil gas content adjustment module 1 to be measured, the environment adjustment module 2 and the online monitoring device 10;

[0082] Data analysis module: receiving the data collected by the data collection module, and comparing and analyzing the collected data with the corresponding data in the database to form a control signal;

[0083] The device control module 21 receives the control signal, controls the oil gas content control module 1 to be measured, the environment control module 2 and the online monitoring device 10 to execute the control signal, simulates the actual operating environment of the oil filling equipment 4, eliminates the interference factors in the monitoring process of the online monitoring device 10, and enables the online monitoring device 10 to perform online correction according to the simulated environment, so that the online monitoring device 10 can accurately measure the gas content in the oil of the oil filling equipment 4.

[0084] In practical applications, when testing the gas content in the oil of the oil filling device 4, according to the Oswald coefficient, the oil temperature will affect the gas concentration in the oil and gas, causing detection errors; the oil pressure can test the stability of the oil filling device 4 in or out, to avoid the oil pressure being too high or too low affecting the oil filling or out; although the oxygen and nitrogen content in the oil will not affect the insulation judgment, in order to simulate the actual operating environment of the oil filling device 4, so as to accurately predict the gas content in the oil of the oil filling device 4 when it is running in the actual environment, it is necessary to fill the oil filling device 4 with a clear oxygen and nitrogen content. The control module 3 can accurately control the oil gas content adjustment module 1 to control the content of the oxygen and nitrogen introduced, and accurately control the oil temperature and oil pressure.

[0085] The oxygen cylinder 5 and the nitrogen cylinder 6 are connected to the temperature-controlled oil cylinder 7 through gas pipes provided with pressure reducing valves, respectively, and oxygen or nitrogen is introduced into the temperature-controlled oil cylinder 7 through the oil filling device 4 .

[0086] The temperature-controlled oil cylinder 7 involved in the present technical solution is a conventional temperature-controlled oil cylinder 7 with an oil pressure control function added thereto, thereby being able to accurately control the gas content and pressure of oxygen and nitrogen in the oil.

[0087] When oil discharge testing is required, the oil in the online monitoring device 10 is discharged to the oil discharge cylinder 8 through the oil pipeline and then tested.

[0088] When this technical solution uses photoacoustic spectroscopy to detect dissolved gas in oil, it is often interfered by the environment (such as temperature, humidity, air pressure, gas composition, noise, etc.). In the process of using photoacoustic spectroscopy to detect dissolved gas in oil, environmental factors (such as temperature, humidity, air pressure, gas composition and noise) may affect the detection results.

[0089] Specifically, the reasons that affect the monitoring accuracy and stability are mainly as follows: during the operation of the online monitoring device 10, the ambient temperature and air pressure will affect the resonance and photoacoustic effect of the photoacoustic cell, the core component of the photoacoustic spectroscopy, and thus affect the detection; the moisture, carbon dioxide and possible sulfur hexafluoride gas in the gas have infrared absorption, which affects the detection; the use of acoustic principles as the sensing element may also affect the detection due to noise.

[0090] Therefore, this technical solution simulates the operating environment of the oil filling equipment 4 through the oil gas content adjustment module 1 to be measured and the environment adjustment module 2, eliminates the interference of temperature, humidity, air pressure, gas components such as water vapor, CO2 and SF6, so that the online monitoring device 10 can accurately monitor.

[0091] In practical applications, the constant temperature and humidity chamber 9 is preferably a constant temperature and humidity chamber 9 that, in addition to basic temperature and humidity control functions, also provides additional functions such as data recording, remote control, etc., provides precise temperature and humidity control, and ensures the consistency and repeatability of test conditions.

[0092] In actual applications, the CO2 bottle 11 is connected to the constant temperature and humidity chamber 9 through a gas pipe, and the air pressure, gas content and other parameters in the constant temperature and humidity chamber 9 are accurately controlled by introducing CO2, etc., and the test atmosphere can be changed according to the test requirements to examine the detection performance of the online monitoring device 10 under different carbon dioxide concentrations, thereby facilitating the correction of the online monitoring device 10.

[0093] In actual applications, the SF6 bottle 12 is connected to the constant temperature and humidity chamber 9 through a gas pipe. The air pressure, gas content and other parameters in the constant temperature and humidity chamber 9 are accurately controlled by introducing SF6, etc., and the test atmosphere can be changed according to the test requirements to examine the detection performance of the online monitoring device 10 under different carbon dioxide concentrations, thereby facilitating the correction of the online monitoring device 10.

[0094] In practical applications, the gas circulator 13 is preferably a stepper motor gas circulator 13, which has the advantage of being able to accurately control the gas circulation rate.

[0095] In practical applications, the sound source jammer 14 is preferably a YOUYSI anti-interference multifunctional line finder, which can not only serve as a sound source jammer 14, but also has a line finding function, and is suitable for network wiring and maintenance work.

[0096] In practical applications, the air pressure transmitter 15 is installed on the constant temperature and humidity chamber 9, and the air pressure in the constant temperature and humidity chamber 9 is precisely controlled by pressure transmission;

[0097] In practical applications, the air pressure transmitter 15 is preferably a Honeywell pressure transmitter, which has the advantages of accurate measurement, easy installation and maintenance.

[0098] In practical applications, the humidity sensor 1616 is preferably DHT22 (or AM2302), which can provide higher precision measurement results.

[0099] In practical applications, the CO2 sensor is installed on the constant temperature and humidity chamber 9 to monitor the CO2 concentration in real time when the current online monitoring device 10 is running. The CO2 sensor is preferably a JW01-CO2 detection module, which uses non-dispersive infrared (NDIR) technology to measure the CO2 concentration in the environment. CO2The concentration range is from 350 to 2000ppm, with high accuracy and fast response. The JW01-CO2 detection module uses serial communication and can communicate with microcontrollers or other devices.

[0100] In practical applications, the hardware of the control module 3 includes a computer 20 , a data router 18 , a data acquisition module 19 , a data acquisition module and a device control module 21 , and a data analysis module is set in the computer 20 .

[0101] The data router 18 is a data acquisition module; 19 is connected to the online monitoring device 10, the air pressure transmitter 15, the humidity sensor 16, and the atmosphere sensor 17 (including a CO2 sensor and a SF6 sensor).

[0102] Next, let's give some specific examples:

[0103] The test platform for the reliability of the online monitoring device for detecting the gas content in the oil of the oil-filled equipment is correctly installed. The oil temperature to be tested is set to 85°C, the oxygen content is 75%, and the nitrogen content is 25%. In the temperature-controlled oil cylinder 7, the oil temperature is kept at the set value. The oil pressure, gas content and other parameters entering the online monitoring device 10 are accurately controlled by introducing oxygen and nitrogen, so that they are at the set value. The ambient temperature is set to 85°C, the air pressure is 101Kpa, the water content in the gas is 3%, the carbon dioxide concentration is 30%, and the sulfur hexafluoride gas is 15%. The interference factors of the detection of dissolved gas in the oil (such as temperature, humidity, air pressure, gas composition, noise, etc.) are eliminated by the oil gas content adjustment module 1 to be tested and the environment adjustment module 2, that is, the air pressure, gas content and other parameters in the constant temperature and humidity chamber 9 are accurately controlled by introducing CO2, SF6, oxygen, nitrogen, etc.), and then the online monitoring device 10 is turned on for detection. Moreover, the test atmosphere or the oxygen and nitrogen content in the oil can be changed according to the test requirements to examine the detection performance of the online monitoring device 10 under different conditions. Thus, the online monitoring device 10 can perform detection under the condition of real-time online interference elimination processing (or noise reduction processing), so that the online monitoring device 10 can accurately monitor the situation used to detect the gas content in the oil of the oil filling device 4, and can make corrections online, and then can accurately detect the early failure of the oil filling device 4, so that the oil filling device 4 can be repaired and troubleshooted in time, ensuring the stable and safe operation of the oil filling device 4.

[0104] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. In the above embodiments, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test platform for testing the operating reliability of an online monitoring device for detecting the gas content in oil of an oil-filled device, comprising an oil-filled device (4), an online monitoring device (10) for monitoring the gas content in oil of the oil-filled device (4), characterized in that Also includes: Control module (3); The gas content regulating module (1) of the oil to be measured is connected to the control module (3) and the online monitoring device (10). The control module (3) collects, analyzes and controls the gas content regulating module (1) of the oil to be measured to fill the oil filling device (4) with the corresponding gas, so as to simulate the gas content in the oil when the oil filling device (4) is actually running; An environmental adjustment module (2): connected to the control module (3) and the online monitoring device (10), wherein the control module (3) collects, analyzes and controls the environmental adjustment module (2) to simulate the working environment of the oil-filled device (4) during actual operation; The control module (3) controls the online monitoring device (10) to perform online correction according to the simulated environment, thereby achieving the purpose of accurately monitoring the amount of gas in the oil of the oil-filled equipment (4), thereby ensuring the monitoring reliability of the online monitoring device (10).

2. The test platform for the operation reliability of the online monitoring device for detecting the gas content in the oil of the oil-filled equipment according to claim 1 is characterized in that: The gas content adjustment module (1) of the oil to be measured comprises: A temperature-controlled oil cylinder (7) connected to the oil filling device (4) and used for filling the oil filling device (4) with oil; An oil discharge cylinder (8) connected to the oil filling device (4) and used to discharge oil from the oil filling device (4); Oxygen cylinder (5) and nitrogen cylinder (6): both of which are connected to the temperature-controlled oil cylinder (7); The control module (3) is used to control the oxygen cylinder (5) and the nitrogen cylinder (6) to fill the oil containing oxygen and nitrogen into the oil filling the equipment through the temperature-controlled oil cylinder (7).

3. The test platform for the operation reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 1 is characterized in that: The environment adjustment module (2) comprises: An atmosphere regulating device: connected to the control module (3) and used to regulate the concentration of the gas in the environment where the oil-filled device (4) is located; An atmosphere sensor (17) is connected to the control module (3) and detects the gas concentration in the environment where the oil filling device (4) is located, forms an atmosphere signal, and transmits the atmosphere signal to the control module (3); The control module (3) receives and analyzes the signal from the atmosphere sensor (17), and controls the operation of the atmosphere adjustment device, so as to adjust the gas concentration in the environment where the oil-filled device (4) is located.

4. The test platform for the operational reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 3 is characterized in that: The environment adjustment module (2) further comprises: A constant temperature and humidity chamber (9): connected to the control module (3), wherein the oil filling device (4) and the online monitoring device (10) are arranged in the constant temperature and humidity chamber (9), and used to keep the environment where the oil filling device (4) and the online monitoring device (10) are located at a constant temperature and humidity; A temperature and humidity sensor (16) is connected to the control module (3), detects the temperature and humidity in the constant temperature and humidity chamber (9), generates a signal, and transmits the signal to the control module (3). The control module (3) receives and analyzes the signal to control the operation of the constant temperature and humidity chamber (9).

5. The test platform for the operational reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 4 is characterized in that: The environment adjustment module (2) further comprises: A sound source interference device: connected to the control module (3), and used to overcome the noise interference inside the constant temperature and humidity chamber (9); A sound sensor is connected to the control module (3), detects the sound in the constant temperature and humidity chamber (9), generates a signal, and transmits the signal to the control module (3). The control module (3) receives and analyzes the signal to control the operation of the sound source interference device.

6. The test platform for the operational reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 5 is characterized in that: The environment adjustment module (2) further comprises: A gas circulator (13) is connected to the control module (3) and is disposed on the constant temperature and humidity chamber (9). The control module (3) controls the gas circulator (13) to circulate the gas in the constant temperature and humidity chamber (9) to form a uniform filling.

7. The test platform for the operational reliability of the online monitoring device for detecting the gas content in the oil of the oil-filled equipment according to claim 5 is characterized in that: The environment adjustment module (2) further comprises: A barometric pressure transmitter (15): connected to the control module (3), and arranged on the constant temperature and humidity chamber (9); the barometric pressure transmitter (15) detects the barometric pressure in the constant temperature and humidity chamber (9), generates a signal, and transmits the signal to the control module (3); the control module (3) receives and analyzes the signal, and controls the barometric pressure transmitter (15) to operate so as to adjust the barometric pressure in the constant temperature and humidity chamber (9).

8. The test platform for the operational reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 3 is characterized in that: The atmosphere regulating device comprises a CO2 bottle (11) and a SF6 bottle (12) both of which are connected to the control module (3) by signals. The control module (3) receives and analyzes data transmitted by the atmosphere sensor (17), and controls the CO2 bottle (11) and the SF6 bottle (12) to charge CO2 and SF6 into a constant temperature and humidity chamber (9) in the environment regulating module (2).

9. The test platform for the operational reliability of the online monitoring device for detecting the gas content in oil of oil-filled equipment according to claim 3 is characterized in that: The atmosphere sensor (17) includes a CO2 sensor and a SF6 sensor.

10. A test platform for the operational reliability of an online monitoring device for detecting the gas content in oil of oil-filled equipment according to any one of claims 1 to 9, characterized in that: The control module (3) comprises: A data acquisition module: the data acquisition module is connected to the oil gas content adjustment module (1), the environment adjustment module (2) and the online monitoring device (10) by signals, and is used to collect data from the oil gas content adjustment module (1), the environment adjustment module (2) and the online monitoring device (10); Data analysis module: receiving the data collected by the data collection module, and comparing and analyzing the collected data with the corresponding data in the database to form a control signal; The device control module (21) receives the control signal, controls the oil gas content control module (1), the environment control module (2) and the online monitoring device (10) to execute the control signal, simulates the actual operating environment of the oil filling device (4), eliminates interference factors in the monitoring process of the online monitoring device (10), enables the online monitoring device (10) to perform online correction according to the simulated environment, and enables the online monitoring device (10) to accurately measure the gas content in the oil of the oil filling device (4).

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