CN112263849B - Stirring speed control method and device based on environmental pressure - Google Patents

Stirring speed control method and device based on environmental pressure Download PDF

Info

Publication number
CN112263849B
CN112263849B CN202011048916.6A CN202011048916A CN112263849B CN 112263849 B CN112263849 B CN 112263849B CN 202011048916 A CN202011048916 A CN 202011048916A CN 112263849 B CN112263849 B CN 112263849B
Authority
CN
China
Prior art keywords
unit
oil
pressure
degassing
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011048916.6A
Other languages
Chinese (zh)
Other versions
CN112263849A (en
Inventor
夏历
徐辉
胡艳波
陈斌
代犇
李俊逸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Infotech Co ltd
Original Assignee
Hubei Infotech Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Infotech Co ltd filed Critical Hubei Infotech Co ltd
Priority to CN202011048916.6A priority Critical patent/CN112263849B/en
Publication of CN112263849A publication Critical patent/CN112263849A/en
Application granted granted Critical
Publication of CN112263849B publication Critical patent/CN112263849B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0042—Degasification of liquids modifying the liquid flow
    • B01D19/0052—Degasification of liquids modifying the liquid flow in rotating vessels, vessels containing movable parts or in which centrifugal movement is caused
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/02—Analysing fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
    • G01N2021/1704—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids in gases

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Acoustics & Sound (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The embodiment of the application provides a stirring speed control method and a device based on environmental pressure, the stirring speed control method based on the environmental pressure obtains a cooling oil sample from an oil-immersed device, carries out degassing treatment on the cooling oil sample to obtain a gas sample to be detected, measures the concentration of characteristic gas in the gas sample to be detected by using a photoacoustic spectroscopy device, and determines the operation fault of the oil-immersed device according to the concentration of the characteristic gas, so that the stirring speed control device based on the environmental pressure obtains sampling data in real time, the operation fault of the oil-immersed device can be predicted according to the concentration of the characteristic gas to give an alarm, and the damage of the oil-immersed device is avoided; meanwhile, the stirring speed is determined according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit, so that the gas sample to be detected is separated from the degassing unit within the target degassing time, and the detection speed is improved.

Description

Stirring speed control method and device based on environmental pressure
Technical Field
The application relates to the field of transformer oil gas monitoring, in particular to a stirring speed control method and device based on environmental pressure.
Background
With the rapid development of national economy, the demand of various industries on electric power is continuously rising, and nowadays, electric power systems are also developing towards ultrahigh voltage, large capacity and automation, so that a large number of large-scale oil-immersed electric power equipment (such as transformers) are adopted in the electric power systems, and in order to guarantee the safe operation of the electric power systems, the degassing state of the large-scale oil-immersed electric power equipment such as the transformers needs to be preventively checked and monitored.
Because insulating structures such as insulating oil, oiled paper or oiled paper board are all selected for use to oily formula power equipment, when the inside thermal fault that takes place of equipment, discharge nature trouble or insulating oil, paper age, can produce multiple gas, these gas can be dissolved in oil, and the gas of the different grade type of dissolving in oil can reflect the electrical fault of different grade type.
At present, in a traditional stirring speed control scheme based on environmental pressure, after an oil sample in oil-immersed power equipment needs to be manually extracted and concentrated in a laboratory, a gas chromatograph is used for determining the degassing state of the oil-immersed equipment, and the efficiency is low.
Disclosure of Invention
The embodiment of the application provides a stirring speed control method and device based on environmental pressure, which are used for solving the technical problem that the existing stirring speed control equipment based on the environmental pressure cannot acquire oil sample data in real time because the oil sample data needs to be manually monitored and processed.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the embodiment of the application provides a stirring speed control method based on environmental pressure, the stirring speed control method based on the environmental pressure is applied to a stirring speed control device based on the environmental pressure, the degassing state monitoring device of oil-immersed equipment comprises an oil path unit, a degassing unit, an air path unit, a measuring unit and a control unit, and the stirring speed control method based on the environmental pressure comprises the following steps:
the control unit sends a sampling enabling signal to the oil circuit unit so that the oil circuit unit obtains a cooling oil sample from oil-immersed equipment;
the control unit sends a degassing enabling signal to the oil path unit and the degassing unit to control the cooling oil sample to flow into the degassing unit from the oil path unit, obtains and determines a stirring speed according to the viscosity of the cooling oil sample and the ambient pressure in the degassing unit, and controls the stirring of a stirring member in the degassing unit based on the stirring speed to enable the degassing unit to degas the cooling oil sample to obtain a gas sample to be tested;
the control unit sends measurement enabling signals to the degassing unit, the gas circuit unit and the measuring unit so as to control the gas sample to be measured to flow into the measuring unit from the degassing unit through the gas circuit unit and control a photoacoustic spectroscopy device in the measuring unit to respectively measure the concentration of the characteristic gas in the gas sample to be measured by using narrow-bandwidth laser corresponding to the characteristic gas;
and the control unit determines the operation fault of the oil-immersed equipment according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit.
Meanwhile, the embodiment of the application provides a stirring speed control device based on environmental pressure, and the monitoring device comprises an oil circuit unit, a degassing unit, an air circuit unit, a measuring unit and a control unit;
the control unit sends a sampling enabling signal to the oil path unit at a first moment so that the oil path unit obtains a cooling oil sample from the oil-immersed equipment;
the control unit further sends a degassing enabling signal to the oil path unit and the degassing unit at a second moment so as to control the cooling oil sample to flow into the degassing unit from the oil path unit, obtains and determines a stirring speed according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit, and controls the stirring of a stirring member in the degassing unit based on the stirring speed so that the degassing unit degasses the cooling oil sample to obtain a gas sample to be tested;
the control unit further sends a measurement enabling signal to the degassing unit, the gas circuit unit and the measurement unit at a third moment so as to control the gas sample to be measured to flow into the measurement unit from the degassing unit through the gas circuit unit and control a photoacoustic spectroscopy device in the measurement unit to measure the concentration of the characteristic gas in the gas sample to be measured by using narrow-bandwidth laser corresponding to the characteristic gas respectively;
and the control unit also determines the operation fault of the oil-immersed equipment at a fourth moment according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit.
Has the advantages that: the embodiment of the application provides a stirring speed control method and device based on environmental pressure, the stirring speed control method based on the environmental pressure is applied to a stirring speed control device based on the environmental pressure, the oil-immersed equipment degassing state monitoring device comprises an oil path unit, a degassing unit, an air path unit, a measuring unit and a control unit, and the stirring speed control method based on the environmental pressure comprises the steps that the control unit firstly sends a sampling enabling signal to the oil path unit so that the oil path unit obtains a cooling oil sample from the oil-immersed equipment; then the control unit sends a degassing enabling signal to the oil path unit and the degassing unit to control the cooling oil sample to flow into the degassing unit from the oil path unit, obtains and determines a stirring speed according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit, and controls the stirring of a stirring member in the degassing unit based on the stirring speed to enable the degassing unit to degas the cooling oil sample to obtain a gas sample to be tested; then the control unit sends measurement enabling signals to the degassing unit, the gas circuit unit and the measuring unit so as to control the gas sample to be measured to flow into the measuring unit from the degassing unit through the gas circuit unit and control a photoacoustic spectroscopy device in the measuring unit to respectively measure the concentration of the characteristic gas in the gas sample to be measured by using narrow-bandwidth laser corresponding to the characteristic gas; then the control unit determines the operation fault of the oil-immersed equipment according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit; according to the embodiment of the application, the cooling oil sample is obtained from the oil-immersed equipment, the degassing treatment is carried out on the cooling oil sample to obtain the gas sample to be detected, the concentration of the characteristic gas in the gas sample to be detected is measured, the operation fault of the oil-immersed equipment is determined according to the concentration of the characteristic gas, the stirring speed control device based on the environmental pressure can obtain the sampling data in real time, the operation fault of the oil-immersed equipment can be predicted according to the concentration of the characteristic gas to give an alarm, and the damage of the oil-immersed equipment is avoided; simultaneously, the stirring speed is determined according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit, and the stirring of the stirring member in the degassing unit is controlled based on the stirring speed, so that the degassing unit is used for degassing the cooling oil sample to obtain a gas sample to be detected, the gas sample to be detected is separated from the degassing unit within the target degassing time, the detection period is shortened, the detection efficiency is improved, and the technical problem that the stirring speed of the stirring member in the oil-gas separation equipment cannot be accurately set by the existing stirring speed control equipment based on the environmental pressure is solved.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a scene schematic diagram of an oil-immersed device monitoring system provided in an embodiment of the present application.
Fig. 2 is a schematic flowchart of a stirring speed control method based on ambient pressure according to an embodiment of the present disclosure.
Fig. 3 is a block diagram of the stirring speed control device based on the ambient pressure according to the present invention.
Fig. 4 is a schematic structural diagram of a symmetrical gas measurement device of an ambient pressure-based stirring speed control apparatus according to an embodiment of the present application.
Fig. 5 is a block diagram illustrating a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present disclosure.
Fig. 6 is a schematic circuit diagram of a photoelectric conversion circuit in a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present application.
Fig. 7 is a schematic circuit diagram of a first signal amplifying circuit in a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present disclosure.
Fig. 8 is a schematic circuit diagram of a band-pass filter circuit in a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present application.
Fig. 9 is a schematic circuit diagram of a second signal amplifying circuit in a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present disclosure.
Fig. 10 is a schematic circuit diagram of an a/D conversion circuit in a signal processing unit of an ambient pressure-based stirring speed control device according to an embodiment of the present application.
Fig. 11 is a schematic view of a first structure of a measurement unit according to an embodiment of the present application.
Fig. 12 is a schematic view of a second structure of a measurement unit according to an embodiment of the present application.
Fig. 13 is a schematic structural diagram of a third measurement unit according to an embodiment of the present application.
Fig. 14 is a schematic structural diagram of a temperature control module according to an embodiment of the present application.
Fig. 15 is a schematic diagram of a temperature adjusting circuit in a temperature control module according to an embodiment of the present application.
Fig. 16 is a schematic structural diagram of the stirring speed control device based on the ambient pressure according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic view of a monitoring system of an oil-immersed device 200 according to an embodiment of the present disclosure, where the monitoring system of the oil-immersed device 200 may include an oil-immersed device 200 and a stirring speed control device 100 based on an ambient pressure, and the stirring speed control device 100 based on the ambient pressure is connected to the oil-immersed device 200 through a pipeline.
In one embodiment, the oil-filled device 200 can include an oil-filled power transformer.
In one embodiment, the stirring speed control apparatus 100 based on ambient pressure may include an oil path unit 110, a degassing unit 120, an air path unit 130, a measurement unit 140, and a control unit 150. The stirring speed control device 100 based on the environmental pressure sends a sampling enable signal to the oil path unit 110 through the control unit 150, so that the oil path unit 110 obtains a cooling oil sample from the oil-immersed device 200; then the control unit 150 sends a degassing enabling signal to the oil path unit 110 and the degassing unit 120 to control the cooling oil sample to flow from the oil path unit 110 to the degassing unit 120, obtains and determines a stirring speed according to the viscosity of the cooling oil sample and the pressure change rate in the degassing unit 120, and controls the stirring of the stirring member 213 in the degassing unit 120 based on the stirring speed to degas the cooling oil sample by the degassing unit 120 to obtain a gas sample to be tested; then the control unit 150 sends measurement enabling signals to the degassing unit 120, the gas path unit 130 and the measurement unit 140 to control the gas sample to be measured to flow from the degassing unit 120 to the measurement unit 140 through the gas path unit 130, and control the photoacoustic spectroscopy device in the measurement unit 140 to measure the concentration of the characteristic gas in the gas sample to be measured respectively by using the narrow-bandwidth laser corresponding to the characteristic gas; then, the control unit 150 determines an operation fault of the oil-filled device 200 according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measurement unit 140.
It should be noted that the system scenario diagram shown in fig. 1 is an example, and the server and the scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows, with the evolution of the system and the occurrence of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Fig. 2 is a schematic flowchart of a stirring speed control method based on ambient pressure according to an embodiment of the present disclosure. Fig. 3 is a block diagram of the stirring speed control device based on the ambient pressure according to the present invention. Referring to fig. 2 and 3, the degassing state control method of the oil-filled device 200 includes the following steps:
s100: the control unit 150 sends a sampling enable signal to the oil path unit 110, so that the oil path unit 110 obtains a cooling oil sample from the oil-filled device 200.
In an embodiment, when the oil unit 110 obtains the cooling oil sample from the oil-filled device 200, the oil unit 110 may be controlled to obtain the cooling oil sample statistics from the oil-filled device 200 by disposing a valve and an oil pump 103 between the oil-filled device 200 and the oil unit 110. For example, when the control unit 150 sends the sampling enable signal to the oil circuit unit 110, a valve between the oil circuit unit 110 and the oil-filled device 200 is opened, the oil pump 103 pumps a cooling oil sample from the oil-filled device 200 into the oil circuit unit 110, and the volume of the cooling oil sample may be specifically defined according to the operation time of the oil pump 103, the operation power of the oil pump 103, and the like.
In one embodiment, after the oil path unit 110 obtains the cooling oil sample, the cooling oil sample is pretreated, for example, when impurities exist in the cooling oil sample, the impurities in the cooling oil, such as solid particles or water, may be removed during the pretreatment, so as to improve the purity of the cooling oil sample.
In one embodiment, as shown in fig. 3, the cooling oil sample in the oil-filled device 200 enters the oil tank 210 in the degassing unit 120 through the first valve 101 in the oil path unit 110. The cooling oil sample in the oil tank 210 enters the oil-filled device 200 through the oil pump 103 and the second valve 102.
S200: the control unit 150 sends a degassing enable signal to the oil path unit 110 and the degassing unit 120 to control the cooling oil sample to flow from the oil path unit 110 to the degassing unit 120, determines a stirring speed according to the viscosity of the cooling oil sample and the ambient pressure in the degassing unit, and controls the stirring of the stirring member 213 in the degassing unit 120 based on the first stirring speed to degas the cooling oil sample by the degassing unit 120 to obtain a gas sample to be tested.
In an embodiment, after obtaining the cooling oil sample, it is necessary to send the cooling oil sample from the oil path unit 110 to the degassing unit 120, the control unit 150 may send degassing enable signals to the oil path unit 110 and the degassing unit 120, so that the cooling oil sample enters the degassing unit 120 from the oil path unit 110, and at the same time, after the cooling oil sample enters the degassing unit 120, the degassing unit 120 separates the gas in the cooling oil sample to obtain the gas sample to be tested.
In one embodiment, when the degassing unit 120 is used to degas the cooling oil sample, the cooling oil sample may be degassed by headspace degassing. The mode of headspace degasification indicates that messenger's cooling oil sample gets into oil tank 210, with the gaseous discharge of oil tank 210 top, avoids original gas in the oil tank 210 to produce the influence to the gas sample that awaits measuring for form the negative pressure in the oil tank 210, then adopt to oil tank 210 bottom heating, carry out the mode of stirring to the cooling oil simultaneously, make the gas sample that awaits measuring in the cooling oil separate out.
Referring to fig. 3, in the first stage, the pressure in the oil tank 210 is mainly pumped to the first target pressure, so that a negative pressure is formed between the oil-filled device 200 and the oil tank 210, and the cooling oil sample in the oil-filled device 200 enters the oil tank 210. First, the control unit 150 controls the suction of the first driving motor 223 driving the piston 222 in the air extraction device 220 in the degassing unit 120 to draw the gas in the oil tank 210 into the cylinder 221 in the air extraction device 220, and discharges the gas in the cylinder 221 through the air passage unit 130 to form a negative pressure in the oil tank 210. The air path unit 130 includes a first air valve 310, a second air valve 320, a third air valve 330 and a fourth air valve 340. For example, the first port 311 and the second port 312 of the first gas valve 310 are communicated, the air pumping device 220 pumps part of the gas in the oil tank 210 into the cylinder 221, then the first port 311 and the third port 313 of the first gas valve 310 are communicated, and the gas in the cylinder 221 is exhausted through the third gas valve 330. The above steps are repeated so that the pressure in the oil tank 210 is reduced to a first target pressure, for example, the outside atmospheric pressure is 100Kpa, the first target pressure in the oil tank 210 may be 2Kpa, and the pressure in the oil tank 210 may be directly obtained by the pressure sensor 230.
In a second phase, a pressure difference between the oil tank 210 and the oil-filled device 200 causes a cooling oil sample inside the oil-filled device 200 to enter said oil tank 210. First, the control unit 150 controls the first valve 101 to open so as to communicate the oil-filled device 200 with the oil tank 210, and the cooling oil sample in the oil-filled device 200 enters the oil tank 210 due to a pressure difference between the oil-filled device 200 and the oil tank 210; when the cooling oil sample in the oil tank 210 reaches the height measured by the upper level sensor 211, the control unit 150 controls the first valve 101 to close. The height of the upper liquid level sensor 211 may be set according to the height of the oil tank 210, for example, the height of the upper liquid level sensor 211 may be set according to 75% of the height of the oil tank 210, or the height of the upper liquid level sensor 211 may be set according to the stirring speed of the stirring member 213 in the oil tank 210, for example, when the stirring speed of the stirring member 213 is 2400rpm, the height of the upper liquid level sensor 211 may be 75% of the height of the oil tank 210, and when the stirring speed of the stirring member 213 is 3000rpm, the height of the upper liquid level sensor 211 may be 70% of the height of the oil tank 210, so as to avoid that the liquid level exceeds the critical height of the oil tank 210 when the cooling oil sample is stirred due to the excessively fast rotation speed of the stirring member 213; alternatively, the height of the upper liquid level sensor 211 may be set according to the stirring temperature of the cooling oil sample in the oil tank 210, and for example, when the stirring temperature of the cooling oil sample is 50 ℃, the height of the upper liquid level sensor 211 may be 75% of the height of the oil tank 210, and when the stirring temperature of the cooling oil sample is 70 ℃, the height of the upper liquid level sensor 211 may be 70% of the height of the oil tank 210.
In the third stage, the gas to be measured in the cooling oil sample enters the measurement unit 140 through the air pumping device 220 and the air path unit 130. Firstly, the control unit 150 controls the first port 311 and the second port 312 of the first air valve 310 to communicate, so that the air extraction device 220 communicates with the oil tank 210, then the control unit 150 controls the stirring member 213 to stir the cooling oil sample in the oil tank 210, then the air extraction device 220 extracts the gas to be measured in the cooling oil sample into the air cylinder 221 in the air extraction device 220, then the control unit 150 controls the first port 311 and the second port 312 of the first air valve 310 to be disconnected, and controls the first port 311 and the third port 313 of the first air valve 310 to communicate, opens the second air valve 320 and the fourth air valve 340, closes the third air valve 330, so that the gas to be measured enters the measurement unit 140 through the air path unit 130; next, the above steps are repeated until the pressure in the oil tank 210 reaches the second target pressure, the above air-extracting step is stopped, and the first air valve 310 is in a closed state. The second target pressure may be equal to or different from the first target pressure, and the specific value of the second target pressure may be defined according to actual conditions.
In a fourth phase, the cooling oil sample in the oil tank 210 is returned to the oil-filled device 200. First, the control unit 150 controls the second valve 102 to communicate the inside of the oil-filled device 200 with the oil tank 210, then controls the oil pump 103 to pump the cooling oil sample in the oil tank 210 into the oil-filled device 200, and when the liquid level of the cooling oil sample in the oil tank 210 reaches the height measured by the lower liquid level sensor 212 in the oil tank 210, the control unit 150 controls the oil pump 103 to stop operating and the second valve 102 to be closed. The height measured by the lower level sensor 212 may be the bottom end of the oil tank 210, and the specific position is not limited in detail in this application.
According to the operation of the above-described stirring speed control device 100 based on the ambient pressure, since the gas to be measured in the tank 210 needs to be degassed within the target degassing time, the stirring speed of the stirring member 213 directly affects the degassing rate of the gas to be measured. For sample oils with different viscosities or temperatures and at different stirring speeds, the degassing rates of the oil-gas separation device in the degassing state monitoring device for the gas to be detected in the sample oil to be separated from the oil-immersed device 200 are different. The degassing state monitoring device of the conventional oil-immersed device 200 generally cannot accurately set the stirring speed of the stirring member 213 in the oil-gas separation device, so that the gas to be measured in the sample oil cannot be separated from the oil-gas separation device within a target time. Secondly, in a high altitude area, such as a plateau area, the atmospheric pressure corresponding to the control device will be less than the standard atmospheric pressure, and the degassing unit 120, the oil path unit 110, the air path unit 130, etc. in the control device will be affected to some extent, for example, when the air-extracting device 220 in the degassing unit 120 pumps the gas to be measured, the reduction of the environmental pressure at high altitude causes the suction force exerted on the gas to be measured by the air-extracting device 220 to be greater than the standard atmospheric pressure, that is, the exhaust time is different, and the difference of the exhaust time causes the calculated value of the viscosity of the cooling oil sample to be deviated, thereby causing the predicted deviation of the stirring speed. The present embodiment mainly determines the stirring speed of the stirring member 213 by obtaining the ambient pressure and the viscosity of the position where the degassing unit 120 is located at the second stage of the stirring speed control apparatus 100 based on the ambient pressure.
In one embodiment, the initial or dynamic pressure in the degassing unit 120, i.e. in the oil tank 210, can be directly obtained from the pressure sensor 230 in fig. 3, whereas the viscosity of the cooling oil sample cannot be directly obtained from the corresponding sensor. The initial stirring speed of the stirring member 213 can be determined by measuring the acting force of the cooling oil sample on the pipeline, the valve or the component in the degassing unit 120 or the physical property of the cooling oil itself in the oil feeding stage, obtaining the viscosity of the cooling oil sample according to the relationship between the physical property of the cooling oil and the viscosity of the cooling oil and the internal pressure of the degassing unit 120, and then according to the correlation among the viscosity, the oil feeding time, the stirring speed and the like.
Specifically, the cooling oil sample may be determined according to the ambient pressure at the location and the initial pressure inside the degassing unit 120, i.e., the initial pressure inside the oil tank 210 in the degassing unit 120, which may be directly measured by the pressure sensor 230, the oil inlet pressure of the cooling oil sample determined according to the pressure difference inside and outside the degassing unit 120, and the speed, viscosity and stirring speed of the stirring member 213 of the cooling oil sample determined according to the oil inlet pressure. This step may thus comprise: acquiring an ambient pressure of the degassing unit 120 at a target location and an initial pressure within the degassing unit 120; acquiring the oil inlet pressure of the cooling oil sample entering the degassing unit 120 according to the environmental pressure and the initial pressure; acquiring the oil feeding rate of the cooling oil sample flowing from the oil path unit 110 into the degassing unit 120; determining the viscosity of the cooling oil sample based on the oil inlet pressure and the oil inlet rate according to the incidence relation among the oil inlet rate, the viscosity and the pressure; and determining the stirring speed of the stirring member 213 based on the viscosity of the cooling oil sample and the target oil-feeding time according to the correlation among the viscosity, the oil-feeding time and the stirring speed.
Specifically, under the same pressure, cooling oil samples with different viscosities have different oil feeding rates, and the viscosities are inversely related to the oil feeding rates, that is, the greater the viscosity of the cooling oil sample is, the smaller the oil feeding rate of the cooling oil sample is, and the smaller the viscosity of the cooling oil sample is, the greater the oil feeding rate of the cooling oil sample is. And under different pressures, the larger the oil inlet pressure of the cooling oil sample is, the larger the oil inlet speed of the cooling oil sample is, and the smaller the oil inlet pressure of the cooling oil sample is, the smaller the oil inlet speed of the cooling oil sample is. The target position of the present embodiment generally refers to a high altitude area, and the temperature and the environmental pressure in the area are both less than the area with an altitude of 0, so that when the oil-intake pressure is calculated in the present embodiment, the change of the environmental pressure needs to be considered, and it is avoided that the oil-intake pressure is lower due to an error of the environmental pressure, and further the stirring speed of the stirring member 213 is set to be lower, so that the gas to be measured cannot be separated within the target degassing time. Secondly, the pressure inside the degassing unit 120 can be directly measured by the pressure sensor 230, and the oil inlet pressure of the cooling oil sample into the degassing unit 120 can be directly obtained according to the difference between the ambient pressure and the pressure inside the degassing unit 120. The diameter of the oil inlet pipeline between the degassing unit 120 and the transformer tank is a determined value, that is, the oil inlet rate of the cooling oil sample can be determined according to the pressure difference between the degassing unit 120 and the transformer tank and the diameter of the oil inlet pipeline. Secondly, regarding the specific correlation among the oil feeding rate, the viscosity and the pressure, the corresponding functional relation can be obtained through historical data or other empirical formulas, that is, the determined viscosity of the cooling oil sample is obtained according to the oil feeding rate of the cooling oil sample and the pressure difference between the degassing unit 120 and the transformer oil tank.
Specifically, the stirring speed in the cooling oil sample is related to the oil feeding time of the cooling oil sample in addition to the viscosity of the cooling oil sample. The stirring speed of the cooling oil sample is positively correlated with the oil inlet time of the cooling oil sample, and the longer the oil inlet time of the cooling oil sample is, the higher the viscosity of the corresponding cooling oil sample is, the higher the corresponding stirring speed is; the shorter the oil inlet time of the cooling oil sample is, the smaller the viscosity of the corresponding cooling oil sample is, and the smaller the corresponding stirring speed is. For the cooling oil sample in the oil-filled device 200 that needs to be introduced into the degassing unit 120 within the target oil-in time, the corresponding viscosity of the cooling oil may be set according to the determined target oil-in time, and the corresponding stirring speed of the stirring member 213 may be determined according to the determined viscosity of the cooling oil. Regarding the correlation among viscosity, oil inlet time and stirring speed, the corresponding functional relation can be obtained through historical data or other empirical formulas.
In the embodiment, the influence of the ambient pressure on the feeding pressure of the cooling oil sample is taken into consideration, the feeding pressure of the cooling oil sample is obtained and obtained according to the difference between the pressure in the oil tank 210 and the actual ambient pressure, the feeding rate of the cooling oil sample into the degassing unit 120 by the oil path unit 110 is determined, the viscosity of the cooling oil sample is determined according to the correlation between the feeding rate and the viscosity and the pressure, the first stirring speed of the stirring member 213 is determined according to the correlation between the viscosity and the feeding time and the stirring speed, the accuracy of determining the stirring speed of the stirring member 213 is improved, the gas to be measured can be separated from the cooling oil sample within the target degassing time, and the degassing efficiency of the gas to be measured is improved.
Different environmental pressures are provided for different altitudes, and various manners for acquiring the environmental pressures are provided, for example, the existing pressure gauge, pitot tube and the like can acquire the environmental pressures corresponding to different altitudes, but the oil-immersed device 200 of the present application is generally a 110KV transformer device, and the environment in which the oil-immersed device works has large magnetic field interference or interference of other factors, so that the environmental pressure cannot be accurately acquired by using a conventional means.
In an embodiment, in the case that the initial pressure in the oil tank 210 of the degassing unit 120 is the same, different ambient pressures correspond to different oil intake rates, so the embodiment obtains the air pressure difference between the target location and the standard atmospheric pressure by obtaining the difference between the oil intake rates of different locations, and further determines the ambient difference of the target location. The step of obtaining the ambient pressure of the degassing unit 120 at the target location may thus comprise: obtaining a first oil feed rate of the degasser unit 120 at standard atmospheric pressure; acquiring a second oil feed rate of the degassing unit 120 at the target location; and acquiring the environmental pressure of the degassing unit 120 at the target position according to the difference value of the first oil-taking rate and the second oil-taking rate.
Specifically, the degassing unit 120 uses a headspace negative pressure degassing method to degas the cooling oil sample in the oil tank 210, and the factor determining the oil feeding rate of the cooling oil sample into the degassing unit 120 is related to the oil feeding pressure to which the cooling oil sample is subjected, in addition to the viscosity of the cooling oil sample itself, and the oil feeding pressure is related to the initial negative pressure in the oil tank 210 and the external environment pressure of the oil tank 210. For different locations, different ambient pressures correspond to different oil intake pressures, with the same initial pressure within the oil tank 210. The present embodiment first obtains a first oil feeding rate of the cooling oil sample from the oil path unit 110 into the degassing unit 120 at an altitude of 0, and then places the monitoring device at a target location, such as a plateau with an altitude of 5000m, and obtains a second oil feeding rate of the cooling oil sample from the oil path unit 110 into the degassing unit 120, where the first oil feeding rate is greater than the second oil feeding rate because the pressure of the plateau environment is less than 101.325Kpa of the standard atmospheric pressure. Secondly, acquiring the correlation between the environmental pressure and the oil feeding rate according to the standard atmospheric pressure and the first oil feeding rate, and determining the environmental pressure of the target position based on the second oil feeding rate.
In the embodiment, by using different oil feeding rates corresponding to the cooling oil sample entering the degassing unit 120 from the oil path unit 110 at different altitudes, acquiring the correlation between the environmental pressure and the oil feeding rate according to the oil feeding rate corresponding to the standard atmospheric pressure, and determining the environmental pressure at the target position based on the oil feeding rate determined at the target position, the influence on the setting of the stirring speed of the stirring member 213 due to the change of the environmental pressure is eliminated, the accuracy of the setting of the stirring speed is improved, the gas to be measured can be separated from the cooling oil sample within the target degassing time, and the degassing efficiency of the gas to be measured is improved.
In one embodiment, after the cooling oil sample enters the degassing unit 120, the cooling oil sample needs to be stirred, so that the gas to be measured in the cooling oil sample enters the cylinder 221 of the pumping device 220 through the pumping action of the pumping device 220 in the degassing unit 120. The first driving motor 223 in the air extractor 220 applies a driving force to the piston 222, the air in the oil tank 210 is sucked into the air extractor 220 by the air extractor 220, the driving force applied by the first driving motor 223 to the piston 222 needs to overcome a pressure difference between an ambient pressure and an initial pressure in the oil tank 210, and since the ambient pressures at different positions are different, the air extraction pressures of the piston 222 in the air extractor 220 are different on the premise that the first driving motor 223 outputs the same power, and the ambient pressure at a target position is determined according to the difference of the air extraction pressures at different positions. The step of obtaining the ambient pressure of the degassing unit 120 at the target location may thus comprise: acquiring a first pumping pressure of the pumping device 220 in the degassing unit 120 at a standard atmospheric pressure; acquiring a second pumping pressure of the pumping device 220 in the degassing unit 120 at the target position; and acquiring the ambient pressure of the degassing unit 120 at the target position according to the difference between the first pumping pressure and the second pumping pressure.
Specifically, the degassing unit 120 uses a headspace negative pressure degassing method to degas the cooling oil sample in the oil tank 210, and it is required to pump the gas in the degassing unit 120 into the cylinder 221 in the degassing device 220 by using the degassing device 220, and to introduce the gas to be measured in the cylinder 221 into the measurement unit 140 by using the degassing device 220. The suction pressure of the piston 222 is different for different altitudes during the suction process of the suction device 220. For example, in the case that the initial pressure in the oil tank 210 is 50Kpa, different ambient pressures correspond to different oil-intake pressures, the embodiment first obtains the pressure of the degassing unit 120 at the position with the altitude of 0, the atmospheric pressure is 101.325Kpa of the standard atmospheric pressure, the force exerted by the first drive motor 223 on the piston 222 needs to overcome a first pressure difference between the normal atmospheric pressure and the initial pressure in the tank 210, the remaining force being said first suction pressure of the piston 222, secondly, the monitoring equipment is placed at a target position, such as a plateau with the altitude of 5000m, with the same force applied by the first drive motor 223, due to the second pressure differential between the ambient pressure that the piston 222 needs to overcome and the initial pressure within the tank 210, the second pressure differential is less than the first pressure differential, and thus the second pumping pressure of the piston 222 is greater than the first pumping pressure at the target position. Secondly, acquiring the correlation between the environmental pressure and the pumping pressure according to the standard atmospheric pressure and the first pumping pressure, and determining the environmental pressure of the target position based on the second pumping pressure.
In the embodiment, by obtaining the correlation between the environmental pressure and the pumping pressure according to the different pumping pressures of the piston 222 in the pumping device 220 at different altitudes and the corresponding pumping pressures under the standard atmospheric pressure, and determining the environmental pressure at the target position based on the pumping pressure determined at the target position, the influence on the setting of the stirring speed of the stirring member 213 due to the change of the environmental pressure is eliminated, the accuracy of the setting of the stirring speed is improved, the gas to be measured can be separated from the cooling oil sample within the target degassing time, and the degassing efficiency of the gas to be measured is improved.
In one embodiment, the cooling oil sample needs to be pumped to a target pressure, e.g. 2Kpa as described above, in the oil tank 210 before entering the degassing unit 120, and the cooling oil sample is allowed to enter the degassing unit 120 from the oil circuit unit 110 depending on the ambient pressure and the negative pressure in the oil tank 210. In the process of pumping the pressure in the oil tank 210 to the negative pressure, the air pumping device 220 is used, the first driving motor 223 applies driving force to the piston 222, and the air in the oil tank 210 is pumped into the air pumping device 220 by the air pumping device 220. And the change value of the exhaust pressure is small due to the replacement of the target position, so that the technical problem of inaccurate environmental pressure measurement can occur in the environmental pressure measurement process. Since the gas in the oil tank 210 needs to be pumped for several times to reduce the pressure in the oil tank 210 to the target pressure, the present embodiment can determine the ambient pressure of the target location according to the time for reducing the pressure in the oil tank 210 to the target pressure. Thus, the step of obtaining the ambient pressure of the degassing unit 120 at the target location may comprise: acquiring a first pumping time for pumping the degassing unit 120 to a target pressure by the pumping device 220 of the degassing unit 120 at a standard atmospheric pressure; acquiring a second pumping time for pumping the degassing unit 120 to a target pressure by the pumping device 220 of the degassing unit 120 at a target position; and acquiring the ambient pressure of the degassing unit 120 at the target position according to the difference between the first pumping time and the second pumping time.
Specifically, in the process of pumping the air to the negative pressure, the degassing unit 120 has different corresponding ambient pressures for different positions, and the pumping pressure and the exhaust pressure of the piston 222 are different under the condition that the first driving motor 223 applies the same driving force, and the pumping pressure under the standard atmospheric pressure environment is greater than the pumping pressure under the high altitude environment. In this embodiment, first air-extracting time spent by the air-extracting device 220 to extract the oil tank 210 in the air-extracting unit 120 to a target pressure, for example, 2Kpa, in an environment where the altitude of the air-extracting unit 120 is 0 and the atmospheric pressure is 101.325 Kpa; next, the monitoring device is placed at a target location, for example, a plateau with an altitude of 5000m, and under the condition that the first driving motor 223 applies the same acting force, a second pumping time taken for the pumping device 220 to pump the oil tank 210 in the degassing unit 120 to the target pressure is obtained, and since the first pumping pressure is less than the second pumping pressure, the first pumping time is greater than the second pumping time. Secondly, acquiring the correlation between the environmental pressure and the air-extracting time according to the standard atmospheric pressure and the first air-extracting time, and determining the environmental pressure of the target position based on the second air-extracting time.
The present embodiment improves the accuracy of the calculation of the environmental pressure by obtaining the difference between the times taken by the degassing unit 120 to be pumped to the target pressure according to the different pumping pressures of the piston 222 in the pumping device 220 at different altitudes, and determining the environmental pressure at the target position based on the difference between the pumping times in different position environments, and it eliminates the influence on the setting of the stirring speed of the stirring member 213 due to the change of the environmental pressure, further improves the accuracy of the setting of the stirring speed, so that the gas to be measured can be separated from the cooling oil sample within the target degassing time, and improves the degassing efficiency of the gas to be measured.
In one embodiment, after the cooling oil sample enters the degassing unit 120, the cooling oil sample needs to be stirred, so that the gas to be measured in the cooling oil sample enters the cylinder 221 of the pumping device 220 through the pumping action of the pumping device 220 in the degassing unit 120, and the gas to be measured in the cylinder 221 is introduced into the measuring unit 140 through the pressing action of the piston 222. However, since the environmental pressures at different positions are different, under the condition that the first driving motor 223 outputs the same power, the gas to be measured in the pumping device 220 at different altitudes is subjected to different exhaust pressures, i.e., the time taken for introducing the gas to be measured in the cylinder 221 into the measuring unit 140 is different, and the environmental pressure at the target position is determined based on the different exhaust times corresponding to the different positions. The step of obtaining the ambient pressure of the degassing unit 120 at the target location may thus comprise: acquiring a first exhaust time of the gas to be measured at a standard atmospheric pressure from the gas extraction device 220 in the degassing unit 120 into the measurement unit 140; acquiring a second exhaust time of the gas to be measured at the target position from the gas exhaust device 220 in the degassing unit 120 into the measurement unit 140; and acquiring the ambient pressure of the degassing unit 120 at the target position according to the difference between the first exhaust time and the second exhaust time.
Specifically, the degassing unit 120 uses a headspace negative pressure degassing method to degas the cooling oil sample in the oil tank 210, and it is required to pump the gas in the degassing unit 120 into the cylinder 221 in the degassing device 220 by using the degassing device 220, and to introduce the gas to be measured in the cylinder 221 into the measurement unit 140 by using the degassing device 220. In the exhaust process of the air extractor 220, the pressure difference between the pressure in the cylinder 221 and the ambient atmospheric pressure needs to be overcome, and the ambient pressures at different altitudes are different, so the exhaust pressure exerted on the gas to be measured by the piston 222 is different. For example, in the case where the pressures in the cylinders 221 are all 50Kpa, different altitudes correspond to different pressure differences, and the present embodiment first obtains the pressure difference between the degassing unit 120 at the position with the altitude of 0, the atmospheric pressure of 101.325Kpa, the force exerted by the first drive motor 223 on the piston 222 needs to overcome a third pressure difference between the standard atmospheric pressure and the pressure inside the cylinder 221, the remaining force being said first exhaust pressure of the gas to be measured that the piston 222 acts on the cylinder 221, secondly, the monitoring equipment is placed at a target position, such as a plateau with the altitude of 5000m, with the same force applied by the first drive motor 223, due to a fourth pressure differential between the ambient pressure that the piston 222 needs to overcome and the pressure within the cylinder 221, the fourth pressure differential is less than the third pressure differential, such that the second exhaust pressure of the piston 222 is greater than the first exhaust pressure at the target position. The larger the exhaust pressure is, the shorter the exhaust time of the gas to be measured entering the measurement unit 140 from the gas exhaust device 220 in the degassing unit 120 is, and the smaller the exhaust pressure is, the longer the exhaust time of the gas to be measured entering the measurement unit 140 from the gas exhaust device 220 in the degassing unit 120 is. Secondly, acquiring the correlation between the ambient pressure and the exhaust time according to the standard atmospheric pressure and the first exhaust time, and determining the ambient pressure of the target position based on the second exhaust time.
In the embodiment, by acquiring different exhaust times of the gas to be measured entering the measurement unit 140 from the air extractor 220 in the degassing unit 120 at different altitudes, acquiring the correlation between the ambient pressure and the exhaust time according to the corresponding exhaust time under the standard atmospheric pressure, and determining the ambient pressure at the target position based on the exhaust time determined at the target position, the influence on the setting of the stirring speed of the stirring member 213 due to the change of the ambient pressure is eliminated, the accuracy of the setting of the stirring speed is improved, the gas to be measured can be separated from the cooling oil sample within the target degassing time, and the degassing efficiency of the gas to be measured is improved.
In one embodiment, after the cooling oil sample in the degassing unit 120 is degassed, the cooling oil sample needs to flow back into the oil-filled device 200, and the cooling oil sample in the oil tank 210 needs to flow back into the oil-filled device 200 by using the oil pump 103 because the oil-filled device 200 is at the standard atmospheric pressure and the pressure inside the degassing unit 120 is a predetermined negative pressure. Due to different environmental pressures at different positions, under the condition that the oil pump 103 outputs the same power, the suction force of the oil pump 103 on the cooling oil sample is different at different altitudes, that is, the time taken for the oil sample to be cooled in the oil tank 210 to flow back to the oil-immersed device 200 is different, and the environmental pressure of the target position is determined based on different oil return times corresponding to the different positions. The step of obtaining the ambient pressure of the degassing unit 120 at the target location may thus comprise: acquiring a first oil return time for the oil pump 103 of the oil circuit unit 110 to return the cooling oil sample in the degassing unit 120 to the oil-filled device 200 at the standard atmospheric pressure; acquiring a second oil return time for the oil pump 103 of the oil path unit 110 to return the cooling oil sample in the degassing unit 120 to the oil-filled device 200 at the target position; and acquiring the ambient pressure of the degassing unit 120 at the target position according to the difference between the first oil return time and the second oil return time.
Specifically, when the pressure in the oil tank 210 is reduced to a preset pressure during the stirring of the cooling oil sample, the degassing process of the cooling oil sample is finished. Secondly, the cooling oil sample needs to flow back into the oil-immersed device 200, so that waste of the cooling oil sample is avoided. However, due to different environmental pressures at different positions, the suction force of the oil pump 103 on the cooling oil sample is different at different altitudes under the condition that the oil pump 103 outputs the same power. For example, in the case that the pressure in the oil tank 210 is 2Kpa, different altitudes correspond to different pressure differences, the embodiment first obtains the position of the degassing unit 120 at the altitude of 0, the atmospheric pressure is 101.325Kpa, and the suction force output by the oil pump 103 needs to overcome the difference between the standard atmospheric pressure and the pressure in the oil tank 210; secondly, placing the monitoring device at a target location, such as a plateau at an altitude of 5000m, etc., also requires overcoming the difference between the ambient pressure at the target location and the pressure inside the tank 210, and because the environmental pressure of the target position is lower than the standard atmospheric pressure, the suction force exerted on the cooling oil sample by the oil pump 103 at the target position is larger than the suction force exerted on the cooling oil sample by the cooling oil at the standard atmospheric pressure, and a first oil return time for the oil pump 103 of the oil circuit unit 110 to return the cooling oil sample in the degassing unit 120 to the oil-filled device 200 at the normal atmospheric pressure is acquired according to the above, and a second oil return time during which the oil pump 103 of the oil path unit 110 returns the cooling oil sample in the degassing unit 120 to the oil-filled device 200 at the target position, wherein the first oil return time is shorter than the second oil return time according to a difference in suction force between the oil pump and the degassing unit. And secondly, acquiring the correlation between the ambient pressure and the oil return time according to the standard atmospheric pressure and the first oil return time, and determining the ambient pressure of the target position based on the second oil return time.
In this embodiment, the oil pump 103 of the oil path unit 110 at different altitudes is used to enable the cooling oil sample in the degassing unit 120 to flow back to the oil return time of the oil-immersed device 200, the correlation between the environmental pressure and the oil return time is obtained according to the corresponding oil return time at the standard atmospheric pressure, and the environmental pressure at the target position is determined based on the oil return time determined at the target position, so that the influence on the setting of the stirring speed of the stirring member 213 due to the change of the environmental pressure is eliminated, the accuracy of the setting of the stirring speed is improved, the gas to be measured can be separated from the cooling oil sample within the target degassing time, and the degassing efficiency of the gas to be measured is improved.
In one embodiment, as altitude increases, in addition to atmospheric pressure decreasing, the ambient temperature decreases, that is, the ambient temperature of oil-filled device 200 decreases, and the temperature of the cooling oil sample entering degassing unit 120 from oil-filled device 200 may decrease to some extent, so that temperature is taken into consideration. Thus, according to the correlation of oil feed rate, viscosity and pressure, the step of determining the viscosity of the cooling oil sample based on the oil feed pressure and the oil feed rate may comprise: acquiring the oil inlet temperature of the cooling oil sample; and determining the viscosity of the cooling oil sample based on the oil inlet pressure, the oil inlet temperature and the oil inlet rate according to the incidence relation among the oil inlet rate, the viscosity, the temperature and the pressure.
Specifically, the change of the altitude corresponds to the change of the ambient temperature, the temperature is inversely related to the viscosity, and the larger the temperature is, the smaller the viscosity is, and the smaller the temperature is, the larger the viscosity is. The embodiment obtains the oil inlet temperature of the cooling oil sample before viscosity calculation, and determines the viscosity of the cooling oil sample according to the incidence relation of oil inlet speed, viscosity, temperature and pressure based on the oil inlet pressure, the oil inlet temperature and the oil inlet speed.
In an embodiment, the value of the gas concentration to be measured actually obtained by the measuring unit is generally larger than the initial predicted concentration due to the uncertain factors in various aspects, and since the cooling oil sample belongs to the same batch of cooling oil samples, the value of the gas concentration to be measured actually obtained by the measuring unit can be adjusted according to the difference between the value of the characteristic gas concentration of the current cycle and the predicted concentration, and the step can include: acquiring a first difference value between the concentration of the characteristic gas in the current measurement period and the predicted concentration of the gas to be measured in the cooling oil sample; judging whether the first difference value is larger than a first threshold value or not; if the first difference is greater than the first threshold, determining a second stirring speed of the stirring member 213 in the next measurement period based on the first difference and the target degassing time according to the correlation among the concentration, the degassing time and the stirring speed; if the first difference is smaller than the first threshold, the first stirring speed of the stirring member 213 is the target stirring speed of the stirring member 213 in the current measurement period.
In one embodiment, when a first difference between the concentration of the characteristic gas in the current measurement period and the predicted concentration of the gas to be measured in the cooling oil sample is greater than a first threshold, the stirring speed needs to be adjusted, and the stirring speed of the stirring member 213 has an upper limit of increase, i.e., a critical stirring speed, and if the difference between the concentration of the characteristic gas in the current measurement period and the predicted concentration of the gas to be measured in the cooling oil sample is greater, the stirring speed of the stirring member 213 needs to be increased to a second stirring speed that exceeds the critical stirring speed, the limitation of the stirring speed needs to be compensated by adjusting other adjustment factors.
Specifically, in this embodiment, through the relationship between the temperature and the stirring speed, in the case that the stirring speed cannot be increased, the stirring temperature of the stirring member 213, that is, the temperature of the cooling oil sample, is adjusted to compensate for the limitation of the stirring speed, and the step may include: determining whether the second stirring speed is greater than a critical stirring speed of the stirring member 213; if the second stirring speed is greater than the critical stirring speed of the stirring member 213, which is the target stirring speed of the stirring member 213 in the next measurement period, determining the initial temperature of the cooling oil sample in the next measurement period based on the critical stirring speed and the concentration of the characteristic gas according to the correlation between the temperature, the concentration and the stirring speed; if the second stirring speed is less than the critical stirring speed of the stirring member 213, the second stirring speed is the target stirring speed of the stirring member 213 in the next measurement period.
In one embodiment, when a first difference between the concentration of the characteristic gas and the predicted concentration of the gas to be measured in the cooling oil sample in the current measurement period is greater than a first threshold value, the stirring speed needs to be adjusted; and after the stirring speed of the stirring member 213 is increased, the liquid level of the cooling oil sample in the corresponding oil tank 210 will be increased, and since the oil tank 210 is connected to the corresponding oil-gas pipeline, the increase in the liquid level of the cooling oil sample may cause the cooling oil sample to enter other devices through the oil-gas pipeline, so that the critical liquid level of the cooling oil sample in the oil tank 210 is achieved to prevent the cooling oil sample from entering other components, and therefore the step may include: acquiring the liquid level height of the cooling oil sample in the current measurement period; judging whether the liquid level height of the cooling oil sample is larger than the critical liquid level height of the cooling oil sample; if the liquid level height of the cooling oil sample is greater than the critical liquid level height of the cooling oil sample, and the critical liquid level height is the liquid level height of the cooling oil sample in the next measurement period, determining the stirring speed of the stirring member 213 in the next measurement period based on the critical liquid level height and the concentration of the characteristic gas according to the correlation between the liquid level height, the concentration and the stirring speed; if the liquid level height of the cooling oil sample is less than the critical liquid level height of the cooling oil sample, the second stirring speed is the target stirring speed of the stirring member 213 in the next measurement period.
In one embodiment, the degassing time of the current measurement cycle is also an important reference value set for the stirring speed, the degassing time represents the degassing rate of the gas to be measured in the cooling oil sample, the degassing time is short, the degassing rate of the gas to be measured is high, and the stirring speed of the next measurement cycle needs to be reduced corresponding to the higher stirring speed so that the degassing time of the gas to be measured is equal to the target degassing time; if the degassing time is long, the degassing rate of the gas to be measured is small, and the stirring speed of the next measurement period needs to be increased corresponding to a smaller stirring speed, so that the degassing time of the gas to be measured is equal to the target degassing time, and therefore the step may include: acquiring the degassing time of the gas to be measured in the cooling oil sample in the current measurement period; judging whether the degassing time in the current measurement period is equal to the target degassing time or not; if the degassing time in the current measurement period is not equal to the target degassing time, determining the stirring speed of the stirring member 213 in the next measurement period based on the concentration of the characteristic gas in the current measurement period and the target degassing time according to the incidence relation among the concentration, the degassing time and the stirring speed.
In an embodiment, the pumping pressure and the pumping speed of the pumping device 220 in the oil tank 210 can also be used as variables for adjusting the degassing speed, which will not be described in detail herein.
In the step, the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit, is compared with the predicted concentration of the gas to be measured, and the stirring speed or/and the temperature and the like in the next measuring period are/is adjusted according to the difference value of the characteristic gas and the predicted concentration of the gas to be measured, so that the gas to be measured in the cooling oil sample in the next measuring period is separated from the degassing unit within the target degassing time.
S300: the control unit 150 sends measurement enabling signals to the degassing unit 120, the gas path unit 130 and the measurement unit 140 to control the gas sample to be measured to flow from the degassing unit 120 to the measurement unit 140 through the gas path unit 130, and control the photoacoustic spectroscopy device in the measurement unit 140 to measure the concentration of the characteristic gas in the gas sample to be measured respectively by using the narrow-bandwidth laser corresponding to the characteristic gas;
in an embodiment, after obtaining the gas sample to be measured, the concentration of the characteristic gas in the gas sample to be measured needs to be measured, the control unit 150 may send a measurement enable signal to the degassing unit 120, the gas path unit 130, and the measurement unit 140, so that the gas to be measured flows from the degassing unit 120 into the gas path unit 130, and then flows from the gas path unit 130 into the measurement unit 140, and the photoacoustic spectroscopy device in the measurement unit 140 measures the concentration of the characteristic gas to obtain the concentration of each characteristic gas.
In one embodiment, after the gas sample to be tested flows into the gas path unit 130 from the degassing unit 120, the gas sample to be tested is pretreated, and considering that the gas sample to be tested may contain water, the gas sample to be tested may be dried, so that the water does not affect the test of the gas sample to be tested.
In one embodiment, the characteristic gas refers to a gas separated from the cooling oil that causes a failure of oil-filled device 200, different types of characteristic gases having different concentrations, different types of operational failures of oil-filled device 200, and when the concentration of the different types of characteristic gases is low, the operation failure of the oil-filled device 200 does not occur, but by predicting the different types of characteristic gases, thereby predicting the operation failure of oil-filled device 200, and the characteristic gas causing the failure of oil-filled device 200 includes hydrogen, carbon monoxide, methane, acetylene, ethylene, carbon dioxide, ethane, when measuring the concentration of the characteristic gas in the gas to be measured, only one of the characteristic gases may be present, that is, only one of the characteristic gases has a concentration greater than 0, and the other characteristic gases have a concentration of 0.
In one embodiment, the characteristic gas may be any one of methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide and hydrogen, and when the gas sample to be measured is measured, the concentration of all kinds of characteristic gases in the gas sample to be measured needs to be measured; the standard gas sample comprises methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, hydrogen and other gases, and the standard concentration of the characteristic gas in the standard gas sample is a known concentration.
In an embodiment, since the gas to be measured generally includes hydrogen, and the concentration of hydrogen can be directly obtained from the cooling oil sample by a corresponding measuring tool, and then the predicted concentration of the gas to be measured in the current measuring period is obtained from the proportional relationship between hydrogen and the concentration of the gas to be measured in the historical data, so as to determine the stirring speed of the stirring member 213, this step may include: controlling the measuring unit 140 to obtain the current concentration of hydrogen in the cooling oil sample; acquiring a proportional relation between the hydrogen concentration and the concentration of the gas to be detected in historical data, and determining the predicted concentration of the gas to be detected based on the current concentration of the hydrogen; and determining the first stirring speed based on the predicted concentration and the target degassing time according to the correlation among the concentration, the degassing time and the stirring speed.
Specifically, the hydrogen concentration can be directly obtained in the cooling oil sample by a specific measuring device due to the characteristics of hydrogen itself. For example, it may control the symmetric gas measurement device in the measurement unit 140 to dip the cooling oil sample in the degassing unit 120 using a symmetric gas absorption member to measure to obtain the current concentration of hydrogen gas before the degassing unit 120 degasses the cooling oil sample.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a symmetrical gas measurement device of an ambient pressure-based stirring speed control apparatus according to an embodiment of the present application, in which a symmetrical gas measurement device 600 includes: a symmetric gas absorbing member 620 for absorbing a symmetric gas in the cooling oil sample, the photosensitivity of the symmetric gas absorbing member 620 being related to the concentration of the symmetric gas absorbed by the symmetric gas absorbing member 620; a laser emitting unit 610 for emitting a first optical signal to the symmetric gas absorption member 620; a signal collection unit 630, configured to receive a second optical signal reflected back from the first optical signal after the symmetric gas absorption member 620 absorbs the symmetric gas; and the signal processing unit 640 is used for determining the concentration of the symmetrical gas in the cooling oil sample according to the change values of the second optical signal and the first optical signal.
Further, the signal processing unit 640 is configured to determine a concentration of the symmetric gas absorbed by the symmetric gas absorption member 620 according to the phase change value of the second optical signal and the first optical signal, and determine a concentration of the symmetric gas in the cooling oil sample according to the concentration of the symmetric gas absorbed by the symmetric gas absorption member 620. The signal processing unit 640 feeds back a phase change value between the first optical signal and the second optical signal and a concentration of the symmetric gas absorbed by the symmetric gas absorption member 620 through the signal processing circuit.
In one embodiment, the signal processing unit 640 first converts the first optical signal and the second optical signal into a first analog signal and a second analog signal according to the phase change values of the first optical signal continuously emitted from the laser emission unit 610 to the symmetric gas absorption member 620 or the first optical signal emitted to the symmetric gas absorption member 620 at a preset frequency interval and the second optical signal reflected back by the symmetric gas absorption member 620, and feeds back the phase difference between the first optical signal and the second optical signal through the phase difference between the first analog signal and the second analog signal; then, other circuit modules of the signal processing circuit further convert the phase difference signal of the analog signal, and finally convert the phase difference signal into the concentration of the symmetric gas absorbed by the symmetric gas absorption member 620, so that a user can determine the concentration of the symmetric gas in the cooling oil sample according to the concentration of the symmetric gas absorbed by the symmetric gas absorption member 620.
In an embodiment, the symmetric gas measuring device 600 further includes a monitoring unit 631, where the monitoring unit 631 is configured to monitor a phase change of the second optical signal, and trigger the signal processing unit 640 to calculate a phase change value of the second optical signal and the first optical signal after monitoring that the phase change value of the second optical signal is smaller than a preset value for a preset time, and specifically, when the monitoring unit monitors that the phase change value of the second optical signal is smaller than the preset value for the preset time, it indicates that the concentration of the symmetric gas absorbed by the surface of the symmetric gas measuring device 600 placed in the cooling oil sample has already reached a stable state, and may trigger the signal processing unit 640 to calculate the phase change value of the second optical signal and the first optical signal.
Referring to fig. 4, the signal acquisition unit 630 of the symmetrical gas measurement device 600 further includes a first reset unit 632, and the first reset unit 632 is configured to delete and reset data detected at the previous time before each detection is completed or the next detection is started, so as to ensure the accuracy of the next detection data.
In an embodiment, the signal processing unit 640 in the symmetric gas measurement device 600 further includes a second reset unit 641, where the second reset unit 641 is also configured to delete and reset the data detected at the previous time before each detection is finished or the next detection is started, so as to ensure the accuracy of the data detected at the next time.
In one embodiment, the symmetric gas absorbing member 620 comprises a laser fiber sensor with at least one palladium-nickel alloy film plated on the surface.
Specifically, the palladium-nickel alloy may function to absorb only hydrogen, and the palladium-nickel alloy film coated on the surface of the symmetric gas absorption member 620 may be directly used to measure the concentration of the symmetric gas in the cooling oil sample.
In one embodiment, the palladium-nickel alloy film on the surface of the symmetric gas absorption member 620 has a thickness in the range of 10-400 um.
Referring to fig. 5, fig. 5 is a block diagram of a signal processing unit 640 of the stirring speed control device based on ambient pressure according to the embodiment of the present disclosure; the signal processing circuit mainly comprises: the photoelectric conversion circuit 61, the first signal amplification circuit 62, the band-pass filter circuit 63, the second signal amplification circuit 64 and the A/D conversion circuit 65, wherein the output end of the photoelectric conversion circuit 61 is electrically connected with the input end of the first signal amplification circuit 62, the output end of the first signal amplification circuit 62 is electrically connected with the input end of the band-pass filter circuit 63, the output end of the band-pass filter circuit 63 is electrically connected with the input end of the second signal amplification circuit 64, and the output end of the second signal amplification circuit 64 is electrically connected with the A/D conversion circuit 65.
Referring to fig. 6 to 10, the signal processing circuit includes:
the photoelectric conversion circuit 61 is configured to convert the optical signal into an electrical signal, where the electrical signal is an analog signal, and the photoelectric conversion circuit 61 includes a first integrated circuit, and the first integrated circuit and each circuit element together convert a phase change between the first optical signal and the second optical signal into a phase change before and after the analog signal, and then the phase change before and after the analog signal is processed by a subsequent circuit unit, so as to finally convert the phase change before and after the analog signal into a symmetric gas concentration absorbed by the symmetric gas absorption member 620.
The first signal amplifying circuit 62 and the first signal amplifying circuit 62 are connected to the output end of the photoelectric conversion circuit 61, and are configured to amplify the analog quantities of the first optical signal and the second optical signal received or reflected by the symmetric gas absorption member 620.
The input end of the band-pass filter circuit 63 is connected with the output end of the first signal amplifying circuit 62, the band-pass filter circuit 63 is used for filtering signals output by the first signal amplifying circuit 62, the purpose of the band-pass filter circuit 63 is to filter useless high-frequency and low-frequency signals and extract useful intermediate-frequency signals, and the band-pass filter circuit 63 adopts a second integrated circuit.
The input end of the second signal amplifying circuit 64 is connected with the output end of the band-pass filter circuit 63, the output signal of the band-pass filter circuit 63 is amplified and transmitted to the A/D conversion circuit 65, which is equivalent to a secondary signal amplification, so as to enable the signal obtained by the A/D conversion circuit 65 to be more accurate and more convenient to convert, and the second signal amplifying circuit 64 also adopts a second integrated circuit.
An input end of the a/D conversion circuit 65 is connected to an output end of the second signal amplification circuit 64, and is configured to convert an analog quantity output by the second signal amplification circuit 64 into a digital quantity, that is, a process of changing a discrete quantity into a continuous quantity, and transmit the obtained digital quantity to the concentration adjustment unit, where the a/D conversion circuit 65 is a third integrated circuit.
Referring to fig. 11, fig. 11 is a schematic view of a first structure of a measurement unit according to an embodiment of the present disclosure, in which the measurement unit 140 includes a plurality of detection units 51 that are not interfered with each other.
Specifically, the gas circuit unit 130 is configured to control the gas sample to be detected to flow from the gas circuit unit 130 to all the detection units 51 according to the measurement enabling signal.
The detection unit 51 is configured to measure the concentration of the characteristic gas to be measured by the detection unit 51 using a narrow-bandwidth laser corresponding to the characteristic gas according to the measurement enable signal.
The characteristic gas to be measured by the detection unit 51 refers to the characteristic gas to be measured by the detection unit 51; the detection unit 51 controls the photoacoustic spectroscopy device in the detection unit 51 to use a narrow-bandwidth laser corresponding to the characteristic gas to be measured by the detection unit 51 according to the measurement enable signal.
It should be noted that each of the detecting units 51 can independently realize the measurement of one kind of characteristic gas, the gas sample to be measured is flushed into the detecting units 51, the characteristic gas in the gas sample to be measured can be simultaneously measured by the detecting units 51 without interfering with each other, different kinds of characteristic gas correspond to the narrow-bandwidth lasers with different wavelengths, different detecting units 51 can use the narrow-bandwidth lasers with different wavelengths to measure different kinds of characteristic gas in the gas sample to be measured, and therefore the concentrations of various kinds of characteristic gas in the gas sample to be measured can be measured simultaneously.
In one embodiment, a plurality of the detecting units 51 are connected in series, which can also be understood as a plurality of the detecting units 51 are connected in cascade; the gas circuit unit 130 is configured to control the gas sample to be detected to sequentially flow into all the detection units 51 from the gas circuit unit 130 according to the measurement enabling signal.
The two adjacent detection units 51 are communicated through a connecting pipe 513, and a valve is arranged on the connecting pipe 513, so that a gas sample to be detected can flow into the detection units 51 in sequence, and meanwhile, the mutual interference among all the detection units 51 can be ensured.
It should be noted that each detection unit 51 is provided with an air inlet 511b and an air outlet 511c, when the measurement unit 140 includes m detection units 51, the m detection units 51 are connected in cascade, and the air inlet 511b of the detection unit 51 located at the first stage may also be communicated with the air path unit 130 through a connection pipe 513 provided with a valve, so as to be used for accessing the gas sample to be detected flowing out of the air path unit 130; after the gas sample to be detected flows into the first-stage detection unit 51, the gas sample to be detected sequentially flows into all the detection units 51 through the connecting pipe 513; the gas outlet 511c of the detection unit 51 at the last stage may also be communicated with the gas path unit 130 through a connecting pipe 513 provided with a valve, so as to allow the measured gas sample to flow into the gas path unit 130 from the detection unit 51, and the measured gas sample to be detected is discharged after being processed by the gas path unit 130, thereby preventing the gas to be detected from polluting the environment.
The air inlet 511b and the air outlet 511c may be located on the same side of the detection units 51, so that the detection units 51 of two adjacent stages are communicated with each other through a connecting pipe 513.
Referring to fig. 12, fig. 12 is a schematic view illustrating a second structure of a measurement unit according to an embodiment of the present disclosure.
In one embodiment, the measurement unit 140 further includes a box 514, and all the detection units 51 are disposed in the box 514.
In one embodiment, the chassis may be a square structure, a plurality of slide rails 515 for supporting the detection unit 51 are disposed on an inner wall of the chassis, the plurality of slide rails 515 are arranged at intervals along a height direction of the chassis, and the detection units 51 correspond to the slide rails 515 one by one; the detection unit 51 is connected with the slide rail 515 in a sliding manner along the length direction of the slide rail 515, so that the detection unit 51 can be conveniently overhauled and replaced, if one detection unit 51 fails, a worker can pull the detection unit 51 out of the chassis for overhauling, and when the detection unit 51 cannot be repaired, the detection unit 51 with a normal function can be used for replacing the detection unit 51 with a failure, so that the measurement unit 140 cannot work when a single detection unit 51 fails.
In an embodiment, the box 514 is further provided with an interface 516, at least one of the interfaces 516 is connected to the control unit 150, the detection unit 51 is provided with a connector 517 matched with the interface 516, and the connector 517 is inserted into the interface 516. An information interaction bridge is built through the butt joint of the interface 516 and the joint 517, so that the information interaction between the control unit 150 and the detection unit 51 is realized, and the control of the control unit 150 on the detection unit 51 and the information feedback of the detection unit 51 on the control unit 150 are realized.
Referring to fig. 13, fig. 13 is a schematic diagram illustrating a third structure of a measurement unit according to an embodiment of the present disclosure.
The detection unit 51 includes a photoacoustic cell 511 and a microphone 512 provided in the photoacoustic cell 511.
Wherein the photoacoustic cell 511 is used for accommodating the gas sample to be detected, and the photoacoustic cell 511 can be a resonant photoacoustic cell 511 for improving the detection sensitivity of the photoacoustic cell 511; the microphone 512 is used for detecting the photoacoustic signal generated after the narrow bandwidth laser is absorbed by the characteristic gas in the gas sample to be detected, and the microphone 512 can convert the acoustic signal generated after the narrow bandwidth laser is absorbed by the characteristic gas in the gas sample to be detected into an analog signal.
Specifically, the photoacoustic cell 511 and the microphone 512 form a photoacoustic spectroscopic device in the detection unit 51.
Specifically, the photoacoustic cell 511 includes a resonant cavity 511a for accommodating the gas sample to be measured, and the gas inlet 511b and the gas outlet 511c are communicated with the resonant cavity 511 a. When the gas sample to be measured is measured, the gas sample to be measured enters the resonant cavity 511a from the gas inlet 511 b.
Specifically, the photoacoustic cell 511 further includes a transparent window 511d, and the narrow bandwidth laser light enters the resonant cavity 511a through the transparent window 511 d.
In one embodiment, each of the detection units 51 is configured to measure the concentration of a characteristic gas.
When a gas sample is measured, one detection unit 51 is only used for measuring the concentration of one characteristic gas in the gas sample, that is, each detection unit 51 corresponds to one characteristic gas, and the control unit 150 controls the detection unit 51 to measure the characteristic gas using a narrow-bandwidth laser with a corresponding wavelength according to the type of the characteristic gas to be measured by the detection unit 51.
Specifically, all the detection units 51 may perform measurement simultaneously, and all the detection units 51 may be used to measure the concentrations of different types of characteristic gases at the same time period, so as to improve the detection efficiency; it is also possible to detect the concentration of the same characteristic gas at the same time period using two or even more detection units 51 to obtain a plurality of concentration detection results of the same characteristic gas and compare the plurality of concentration detection results to ensure the accuracy of the concentration detection results.
Specifically, the time period refers to a time period required for measuring the concentration of one characteristic gas.
In one embodiment, each detection unit 51 includes a separate laser 52, the laser 52 is configured to emit a narrow bandwidth laser according to the emission enable signal sent by the control unit 150, and the laser 52 may be a narrow bandwidth laser, such as a DFB laser.
Wherein, all the detecting units 51 can be used to output the narrow-bandwidth laser light corresponding to each characteristic gas by using the corresponding laser 52 to measure the concentration of the corresponding characteristic gas, so as to improve the detecting efficiency.
Referring to fig. 14 and 15, fig. 14 is a schematic structural diagram of a temperature control module provided in the embodiment of the present application, and fig. 15 is a schematic diagram of a temperature adjusting circuit in the temperature control module provided in the embodiment of the present application.
In one embodiment, the measurement unit 140 further includes a temperature control module for regulating the temperature of the laser diode. Specifically, the temperature control module comprises a voltage controller 721, a voltage stabilizer 722, a voltage comparator 723, a micro-program controller 724 and a temperature regulator 725, wherein the voltage controller 721, the voltage stabilizer 722, the voltage comparator 723 and the micro-program controller 724 form a temperature regulating circuit 720 of the temperature regulating module.
The voltage controller 721 is configured to provide a reference voltage, where the reference voltage is a preset optimal value of an effective working voltage of the laser diode, that is, when the effective working voltage of the laser diode is equal to the reference voltage, the laser diode may emit a narrow-bandwidth laser with a specific frequency and power, and is used for detecting the concentration of the characteristic gas in the gas sample to be measured, so that the measurement accuracy and the sensitivity of the measurement unit 140 are both optimal; furthermore, the closer the effective operating voltage of the laser diode is to the reference voltage, the higher the accuracy and sensitivity of the measurement unit 140 to the characteristic gas concentration measurement. The input terminal of the voltage stabilizer 722 is electrically connected to the output terminal of the voltage controller 721, and is configured to stabilize the reference voltage provided by the voltage controller 721, eliminate fluctuation of the reference voltage, and improve stability and consistency of the reference voltage. A first input terminal of the voltage comparator 723 is electrically connected to the output terminal of the voltage stabilizer 722, a second input terminal of the voltage comparator 723 is electrically connected to the output terminal of the third voltage obtaining module 710, and the voltage comparator 723 is configured to compare the effective working voltage of the laser diode with the voltage value of the reference voltage provided by the voltage controller 721, and transmit the comparison result to the micro-program controller 724. The input end of the micro-program controller 724 is electrically connected with the output end of the voltage comparator 723, and is used for receiving and analyzing the comparison result and sending a corresponding temperature regulation instruction to the temperature regulator 725 according to the comparison result.
Specifically, when the comparison result is that the effective working voltage of the laser diode is less than the reference voltage, the micro-program controller 724 sends a temperature adjustment instruction for reducing the temperature of the laser diode to the temperature adjuster 725; when the comparison result is that the effective working voltage of the laser diode is greater than the reference voltage, the micro-program controller 724 sends a temperature adjusting instruction for increasing the temperature of the laser diode to the temperature adjuster 725; when the comparison result is that the effective working voltage of the laser diode is equal to the reference voltage, the micro-program controller 724 sends a temperature adjusting instruction for maintaining the temperature of the laser diode to the temperature adjuster 725. The input end of the temperature regulator 725 is electrically connected to the output end of the micro-program controller 724, and is configured to regulate and control the temperature of the laser diode under the control of the temperature regulating instruction, so that the laser diode works within a preset temperature range.
S400: the control unit 150 determines an operation fault of the oil-immersed device 200 according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measurement unit 140.
In one embodiment, since the characteristic gas that causes the oil-filled device 200 to malfunction may include hydrogen, carbon monoxide, methane, acetylene, ethylene, carbon dioxide, and ethane, when the concentration of the characteristic gas in the gas to be measured is measured, only one of the characteristic gases may be present, that is, only one of the characteristic gases has a concentration greater than 0, and the other characteristic gases have a concentration of 0. The oil-immersed device 200 corresponds to different fault types, and the types of the characteristic gases measured from the gas sample to be measured are different, for example, when the fault type is that the cooling oil is overheated, the types of the corresponding characteristic gases are hydrogen, ethylene, methane and ethane; when the fault type is cooling oil and paper overheating, the corresponding characteristic gas types are hydrogen, carbon monoxide, carbon dioxide, ethylene, methane and ethane; when the fault type is partial discharge in cooling oil and paper insulation, the types of corresponding characteristic gases are hydrogen, carbon monoxide, carbon dioxide, acetylene, methane and ethane; when the fault type is spark discharge in the cooling oil, the corresponding characteristic gas is hydrogen and acetylene; when the fault type is arc discharge in cooling oil, the corresponding characteristic gas is hydrogen, acetylene, ethylene, methane and ethane; when the fault type is arc discharge in cooling oil and paper, the corresponding characteristic gas is hydrogen, carbon monoxide, carbon dioxide, acetylene, ethylene, methane and ethane; when the fault type is that the paper is wet or the cooling oil has bubbles, the corresponding characteristic gas is hydrogen.
The embodiment of the application provides a degassing state control method for an oil-immersed device 200, the degassing state control method for the oil-immersed device 200 obtains a cooling oil sample from the oil-immersed device 200, carries out degassing treatment on the cooling oil sample to obtain a gas sample to be detected, measures the concentration of a characteristic gas in the gas sample to be detected, and determines an operation fault of the oil-immersed device 200 according to the concentration of the characteristic gas, so that the stirring speed control device 100 based on environmental pressure can obtain sampling data in real time, the operation fault of the oil-immersed device 200 can be predicted according to the concentration of the characteristic gas to give an alarm, and damage to the oil-immersed device 200 is avoided; meanwhile, the stirring speed is determined according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit 120, and the stirring of the stirring member 213 in the degassing unit 120 is controlled based on the stirring speed, so that the degassing unit 120 degasses the cooling oil sample to obtain a gas sample to be detected, the gas sample to be detected is separated from the degassing unit 120 within a target degassing time, the detection period is shortened, the detection efficiency is improved, and the technical problem that the stirring speed of the stirring member 213 in the oil-gas separation device cannot be accurately set by the conventional degassing state monitoring device of the oil-immersed device 200 is solved.
Referring to fig. 4, fig. 4 is a structural diagram of an ambient pressure-based stirring speed control device 400 according to the present invention, where the monitoring device includes an oil path unit 410, a degassing unit 420, an air path unit 430, a measurement unit 440, and a control unit 450;
the control unit 450 is configured to send a sampling enable signal to the oil path unit 410 at a first time, so that the oil path unit 410 obtains a cooling oil sample from an oil-immersed device;
the control unit 450 is further configured to send a degassing enable signal to the oil path unit 410 and the degassing unit 420 at a second time, so as to control the cooling oil sample to flow from the oil path unit 410 to the degassing unit 420, determine a stirring speed according to the viscosity of the cooling oil sample and the ambient pressure inside the degassing unit 420, and control stirring of a stirring member inside the degassing unit 420 based on the stirring speed, so that the degassing unit 420 degasses the cooling oil sample to obtain a gas sample to be tested;
the control unit 450 is further configured to send a measurement enable signal to the degassing unit 420, the gas path unit 430, and the measurement unit 440 at a third time, so as to control the gas sample to be measured to flow from the degassing unit 420 to the measurement unit 440 through the gas path unit 430, and control the photoacoustic spectroscopy device in the measurement unit 440 to measure the concentrations of the characteristic gases in the gas sample to be measured respectively by using narrow-bandwidth laser light corresponding to the characteristic gases;
the control unit 450 is further configured to determine, at a fourth time, an operation fault of the oil-immersed device according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measurement unit 440.
In one embodiment, the degassing unit 420 includes a target pressure obtaining unit, an initial pressure obtaining unit, an oil-feeding rate obtaining unit, a viscosity obtaining unit, and a stirring speed obtaining unit; the target pressure obtaining unit is used for obtaining the environmental pressure of the degassing unit 420 at a target position; the initial pressure obtaining unit is used for obtaining the initial pressure in the degassing unit 420; the oil inlet pressure acquiring unit is used for acquiring the oil inlet pressure of the cooling oil sample entering the degassing unit 420 according to the environment pressure and the initial pressure; the oil-feeding rate acquiring unit is used for acquiring the oil-feeding rate of the cooling oil sample flowing from the oil-way unit 410 to the degassing unit 420; the viscosity obtaining unit is used for determining the viscosity of the cooling oil sample based on the oil inlet pressure and the oil inlet rate according to the incidence relation among the oil inlet rate, the viscosity and the pressure; the stirring speed obtaining unit is used for determining the stirring speed of the stirring member based on the viscosity of the cooling oil sample and the target oil inlet time according to the incidence relation of the viscosity, the oil inlet time and the stirring speed.
In one embodiment, the target pressure obtaining unit includes a standard pressure oil-feeding rate obtaining subunit, a target oil-feeding rate obtaining subunit, and a first target pressure obtaining subunit; the standard pressure oil inlet rate obtaining sub-unit is used for obtaining a first oil inlet rate of the degassing unit 420 under the standard atmospheric pressure; the target oil-intake rate acquiring sub-unit is used for acquiring a second oil-intake rate of the degassing unit 420 at a target position; the first target pressure obtaining sub-unit is configured to first obtain the ambient pressure of the degassing unit 420 at the target location according to the difference between the first oil feed rate and the second oil feed rate.
In one embodiment, the degassing unit 420 is further configured to obtain a first pumping pressure of a pumping device in the degassing unit 420 at a normal atmospheric pressure; acquiring a second pumping pressure of the pumping device in the degassing unit 420 at the target position; and acquiring the environmental pressure of the degassing unit 420 at the target position according to the difference value of the first pumping pressure and the second pumping pressure.
In one embodiment, the degassing unit 420 is further configured to obtain a first pumping time for pumping the degassing unit 420 to a target pressure by a pumping device of the degassing unit 420 at a standard atmospheric pressure; acquiring a second pumping time for pumping the degassing unit 420 to a target pressure by a pumping device of the degassing unit 420 at a target position; and acquiring the ambient pressure of the degassing unit 420 at the target position according to the difference value between the first pumping time and the second pumping time.
In one embodiment, the degassing unit 420 is further configured to obtain a first oil return time for the oil pump of the oil circuit unit 410 to return the cooling oil sample in the degassing unit 420 to the oil-filled device at the standard atmospheric pressure; acquiring a second oil return time for the oil pump of the oil circuit unit 410 to enable the cooling oil sample in the degassing unit 420 to flow back to the oil-filled device at the target position; and acquiring the ambient pressure of the degassing unit 420 at the target position according to the difference value between the first oil return time and the second oil return time.
In one embodiment, the degassing unit 420 is further configured to obtain a first exhaust time of the gas to be measured from the exhaust device in the degassing unit 420 into the measurement unit 440 at the standard atmospheric pressure; acquiring a second exhaust time of the gas to be measured at the target position from the exhaust device in the degassing unit 420 to the measurement unit 440; and acquiring the ambient pressure of the degassing unit 420 at the target position according to the difference value of the first exhaust time and the second exhaust time.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The method and the device for controlling the stirring speed based on the environmental pressure provided by the embodiment of the application are described in detail, a specific example is applied in the description to explain the principle and the implementation manner of the application, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (8)

1. An ambient pressure-based stirring speed control method is applied to an ambient pressure-based stirring speed control device, the stirring speed control device comprises an oil path unit, a degassing unit, an air path unit, a measurement unit and a control unit, and the ambient pressure-based stirring speed control method comprises the following steps:
the control unit sends a sampling enabling signal to the oil circuit unit so that the oil circuit unit obtains a cooling oil sample from oil-immersed equipment;
the control unit sends a degassing enabling signal to the oil path unit and the degassing unit to control the cooling oil sample to flow into the degassing unit from the oil path unit, obtains and determines a stirring speed according to the viscosity of the cooling oil sample and the ambient pressure in the degassing unit, and controls the stirring of a stirring member in the degassing unit based on the stirring speed to enable the degassing unit to degas the cooling oil sample to obtain a gas sample to be tested;
the control unit sends measurement enabling signals to the degassing unit, the gas circuit unit and the measuring unit so as to control the gas sample to be measured to flow into the measuring unit from the degassing unit through the gas circuit unit and control a photoacoustic spectroscopy device in the measuring unit to respectively measure the concentration of the characteristic gas in the gas sample to be measured by using narrow-bandwidth laser corresponding to the characteristic gas;
the control unit determines the operation fault of the oil-immersed equipment according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit;
the step of obtaining and determining a stirring speed based on the viscosity of the cooling oil sample and the ambient pressure within the degassing unit comprises:
acquiring an ambient pressure of the degassing unit and an initial pressure inside the degassing unit at a target position;
acquiring the oil inlet pressure of the cooling oil sample entering the degassing unit according to the environment pressure and the initial pressure;
acquiring the oil inlet rate of the cooling oil sample flowing into the degassing unit from the oil path unit;
determining the viscosity of the cooling oil sample based on the oil inlet pressure and the oil inlet rate according to the incidence relation among the oil inlet rate, the viscosity and the pressure;
and determining the stirring speed of the stirring member based on the viscosity of the cooling oil sample and the target oil feeding time according to the correlation among the viscosity, the oil feeding time and the stirring speed.
2. The ambient pressure based stirring speed control method of claim 1, wherein the step of obtaining the ambient pressure of the degassing unit at the target location comprises:
acquiring a first oil feed rate of the degassing unit at standard atmospheric pressure;
acquiring a second oil intake rate of the degassing unit at the target position;
and acquiring the environmental pressure of the degassing unit at a target position according to the difference value of the first oil feeding rate and the second oil feeding rate.
3. The ambient pressure based stirring speed control method of claim 1, wherein the step of obtaining the ambient pressure of the degassing unit at the target location comprises:
acquiring a first pumping pressure of a pumping device in the degassing unit at the standard atmospheric pressure;
acquiring a second pumping pressure of a pumping device in the degassing unit at the target position;
and acquiring the environmental pressure of the degassing unit at the target position according to the difference value of the first pumping pressure and the second pumping pressure.
4. The ambient pressure based stirring speed control method of claim 1, wherein the step of obtaining the ambient pressure of the degassing unit at the target location comprises:
acquiring first pumping time for pumping the degassing unit to a target pressure by a pumping device of the degassing unit at a standard atmospheric pressure;
acquiring second pumping time for pumping the degassing unit to a target pressure by a pumping device of the degassing unit at a target position;
and acquiring the ambient pressure of the degassing unit at the target position according to the difference value of the first pumping time and the second pumping time.
5. The ambient pressure based stirring speed control method of claim 1, wherein the step of obtaining the ambient pressure of the degassing unit at the target location comprises:
acquiring a first oil return time for an oil pump of the oil circuit unit to enable a cooling oil sample in the degassing unit to return to the oil-immersed equipment at a standard atmospheric pressure;
acquiring a second oil return time for enabling the oil pump of the oil circuit unit to enable the cooling oil sample in the degassing unit to flow back to the oil-immersed equipment at the target position;
and acquiring the environmental pressure of the degassing unit at a target position according to the difference value of the first oil return time and the second oil return time.
6. The ambient pressure based stirring speed control method of claim 1, wherein the step of obtaining the ambient pressure of the degassing unit at the target location comprises:
acquiring first exhaust time of the gas to be measured entering the measuring unit from an exhaust device in the degassing unit at standard atmospheric pressure;
acquiring second exhaust time of the gas to be measured entering the measuring unit from the air exhaust device in the degassing unit at the target position;
and acquiring the ambient pressure of the degassing unit at a target position according to the difference value of the first exhaust time and the second exhaust time.
7. The stirring speed control device based on the environmental pressure is characterized by comprising an oil circuit unit, a degassing unit, an air circuit unit, a measuring unit and a control unit;
the control unit is used for sending a sampling enabling signal to the oil path unit at the first moment so that the oil path unit can obtain a cooling oil sample from the oil-immersed equipment;
the control unit is further used for sending a degassing enabling signal to the oil path unit and the degassing unit at a second moment so as to control the cooling oil sample to flow into the degassing unit from the oil path unit, determining a stirring speed according to the viscosity of the cooling oil sample and the environmental pressure in the degassing unit, and controlling the stirring of a stirring member in the degassing unit based on the stirring speed so that the degassing unit is used for degassing the cooling oil sample to obtain a gas sample to be tested;
the control unit is further configured to send a measurement enabling signal to the degassing unit, the gas path unit and the measurement unit at a third moment, so as to control the gas sample to be measured to flow from the degassing unit to the measurement unit through the gas path unit, and control the photoacoustic spectroscopy device in the measurement unit to measure the concentration of the characteristic gas in the gas sample to be measured by using the narrow-bandwidth laser corresponding to the characteristic gas;
the control unit is further used for determining the operation fault of the oil-immersed equipment at a fourth moment according to the concentration of the characteristic gas in the gas sample to be measured, which is obtained by the measuring unit;
the degassing unit comprises a target pressure intensity obtaining unit, an initial pressure intensity obtaining unit, an oil inlet pressure obtaining unit, an oil inlet speed obtaining unit, a viscosity obtaining unit and a stirring speed obtaining unit;
the target pressure obtaining unit is used for obtaining the environmental pressure of the degassing unit at a target position;
the initial pressure obtaining unit is used for obtaining the initial pressure in the degassing unit;
the oil inlet pressure acquisition unit is used for acquiring the oil inlet pressure of the cooling oil sample entering the degassing unit according to the environment pressure and the initial pressure;
the oil inlet rate acquiring unit is used for acquiring the oil inlet rate of the cooling oil sample flowing into the degassing unit from the oil path unit;
the viscosity obtaining unit is used for determining the viscosity of the cooling oil sample based on the oil inlet pressure and the oil inlet rate according to the incidence relation among the oil inlet rate, the viscosity and the pressure;
the stirring speed obtaining unit is used for determining the stirring speed of the stirring member based on the viscosity of the cooling oil sample and the target oil inlet time according to the incidence relation of the viscosity, the oil inlet time and the stirring speed.
8. The ambient pressure based stirring speed control device of claim 7, wherein said target pressure obtaining unit comprises a nominal pressure oil-intake rate obtaining subunit, a target oil-intake rate obtaining subunit, and a first target pressure obtaining subunit;
the standard pressure oil inlet rate obtaining sub-unit is used for obtaining a first oil inlet rate of the degassing unit under the standard atmospheric pressure;
the target oil inlet rate acquiring sub-unit is used for acquiring a second oil inlet rate of the degassing unit at a target position;
the first target pressure obtaining subunit is configured to first obtain the ambient pressure of the degassing unit at the target location according to a difference between the first oil feed rate and the second oil feed rate.
CN202011048916.6A 2020-09-29 2020-09-29 Stirring speed control method and device based on environmental pressure Active CN112263849B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011048916.6A CN112263849B (en) 2020-09-29 2020-09-29 Stirring speed control method and device based on environmental pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011048916.6A CN112263849B (en) 2020-09-29 2020-09-29 Stirring speed control method and device based on environmental pressure

Publications (2)

Publication Number Publication Date
CN112263849A CN112263849A (en) 2021-01-26
CN112263849B true CN112263849B (en) 2021-09-28

Family

ID=74349357

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011048916.6A Active CN112263849B (en) 2020-09-29 2020-09-29 Stirring speed control method and device based on environmental pressure

Country Status (1)

Country Link
CN (1) CN112263849B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112973196B (en) * 2021-03-15 2022-05-06 悉瑞绿色电气(苏州)有限公司 Method for vacuum defoaming of high-viscosity liquid by using pressure difference and aerodynamic force generated by gas contained in liquid
CN114669088A (en) * 2022-03-15 2022-06-28 湖北鑫英泰系统技术股份有限公司 Oil-gas separation device and degassing method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104772832A (en) * 2015-04-15 2015-07-15 张金木 Epoxy resin vacuum stirring speed control system
CN104919050A (en) * 2012-09-12 2015-09-16 布特马斯先进生物燃料有限责任公司 Processes and systems for the production of fermentation products
JP2016536481A (en) * 2013-09-02 2016-11-24 海斯摩爾生物科技有限公司 High-viscosity pure chitosan spinning solution combined air bubble removal method
CN110224875A (en) * 2019-06-27 2019-09-10 湖北鑫英泰系统技术股份有限公司 A kind of multichannel main/slave link fast switch over method and system
CN110426465A (en) * 2019-07-08 2019-11-08 长园深瑞监测技术有限公司 A kind of transformer oil chromatographic degasser and its control method
CN210487949U (en) * 2019-08-12 2020-05-08 上海西邦电气有限公司 Oil-immersed high-voltage equipment oil-light-sound-spectrum on-line monitoring device
CN112147079A (en) * 2020-09-29 2020-12-29 湖北鑫英泰系统技术股份有限公司 Oil gas monitoring device with filtering capability

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5659126A (en) * 1996-04-19 1997-08-19 Farber; Milton Gas chromatograph techniques for on-line testing of transformer faults
US7687039B2 (en) * 1998-10-28 2010-03-30 Covaris, Inc. Methods and systems for modulating acoustic energy delivery
US20040083889A1 (en) * 2002-11-05 2004-05-06 Rawls Nathan C. Immersion heater for sparge vessel
US7788963B2 (en) * 2006-10-31 2010-09-07 Ric Investments, Llc System and method for calibrating a determination of partial pressure of one or more gaseous analytes
CN105388236B (en) * 2015-11-09 2017-07-18 江苏有能电力自动化有限公司 Transformer oil chromatographic on-line monitoring degasser
CN110567878A (en) * 2019-09-30 2019-12-13 国网上海市电力公司 Portable transformer oil gas detection device
CN111579495A (en) * 2020-05-29 2020-08-25 湖北鑫英泰系统技术股份有限公司 Photoacoustic spectrum oil gas monitoring unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104919050A (en) * 2012-09-12 2015-09-16 布特马斯先进生物燃料有限责任公司 Processes and systems for the production of fermentation products
JP2016536481A (en) * 2013-09-02 2016-11-24 海斯摩爾生物科技有限公司 High-viscosity pure chitosan spinning solution combined air bubble removal method
CN104772832A (en) * 2015-04-15 2015-07-15 张金木 Epoxy resin vacuum stirring speed control system
CN110224875A (en) * 2019-06-27 2019-09-10 湖北鑫英泰系统技术股份有限公司 A kind of multichannel main/slave link fast switch over method and system
CN110426465A (en) * 2019-07-08 2019-11-08 长园深瑞监测技术有限公司 A kind of transformer oil chromatographic degasser and its control method
CN210487949U (en) * 2019-08-12 2020-05-08 上海西邦电气有限公司 Oil-immersed high-voltage equipment oil-light-sound-spectrum on-line monitoring device
CN112147079A (en) * 2020-09-29 2020-12-29 湖北鑫英泰系统技术股份有限公司 Oil gas monitoring device with filtering capability

Also Published As

Publication number Publication date
CN112263849A (en) 2021-01-26

Similar Documents

Publication Publication Date Title
CN112263849B (en) Stirring speed control method and device based on environmental pressure
CN210487949U (en) Oil-immersed high-voltage equipment oil-light-sound-spectrum on-line monitoring device
CN112090120A (en) Degassing device of oil-immersed equipment
CN111474119A (en) Transformer insulating oil photoacoustic spectrum on-line monitoring system
CN112082951A (en) Magnetic stirring control device
CN112067557A (en) Oil-gas detection device of oil-immersed equipment
CN212844848U (en) Measuring device for oil inlet viscosity
CN112147079A (en) Oil gas monitoring device with filtering capability
CN104833456A (en) Onsite detection device and method for pressure sensor of valve cooling system
CN212301296U (en) Magnetic stirring control device
CN112213268B (en) Stirring speed control method and device based on oil inlet pressure
CN112213270B (en) Stirring speed control method and device based on viscosity
CN112067556B (en) Oil-gas detection method and device for oil-immersed equipment
CN112213267B (en) Headspace degassing method and device of oil-immersed equipment
CN213375253U (en) Degassing device of oil-immersed equipment
CN212844856U (en) Measurement device for stirring viscosity
CN213398164U (en) Fault monitoring device capable of reversely purging
CN112082908B (en) Measuring device for stirring viscosity
CN112213277A (en) Oil-immersed equipment oil way control method and device
CN112206551A (en) Stirring speed control method and device based on stirring pressure
CN112179983A (en) Oil-immersed equipment alarm device
CN112082905A (en) Measuring device for oil inlet viscosity
CN112082908A (en) Measurement device for stirring viscosity
CN112213269A (en) Oil-immersed equipment alarm method and oil-immersed equipment alarm device
CN112213266B (en) Laser monitoring device with laser instrument function that adjusts temperature

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A stirring speed control method and device based on ambient pressure

Effective date of registration: 20220610

Granted publication date: 20210928

Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd.

Pledgor: HUBEI INFOTECH CO.,LTD.

Registration number: Y2022420000153

PC01 Cancellation of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20230922

Granted publication date: 20210928

Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd.

Pledgor: HUBEI INFOTECH CO.,LTD.

Registration number: Y2022420000153