A transformer oil multi-parameter sensing device calibration platform and method

Abstract

The application provides a transformer oil multi-parameter sensing device calibration platform and method. The platform comprises a standard new oil cup, an aged oil sample oil cup, a standard substance sample cup, a first straight-through valve, a second straight-through valve, a third straight-through valve, a micro pump, a standard sample oil pool, a transformer oil multi-parameter sensing device, and a terminal. The standard new oil cup, the aged oil sample oil cup, and the standard substance sample cup are used to contain different types of oil samples. The transformer oil multi-parameter sensing device is used to detect the parameters of the oil samples in the three oil cups and send the parameters to the terminal. The terminal calibrates the transformer oil multi-parameter sensing device according to the parameters, thereby solving the problem that the transformer oil multi-parameter sensing device needs to be calibrated regularly.

Description

Technical Field

[0001] This application belongs to the field of transformer oil testing equipment, specifically relating to a calibration platform and method for a multi-parameter sensor device for transformer oil. Background Technology

[0002] Transformer oil possesses excellent insulation, heat dissipation, and arc-extinguishing properties, and is commonly used in transformers, oil-immersed circuit breakers, and other oil-immersed electrical equipment. Transformer oil serves as the primary insulating medium for electrical equipment.

[0003] The quality of transformer oil can be monitored by detecting parameters within the oil. There are more than ten parameters that determine the quality of transformer oil, including oil breakdown voltage, volume resistivity, moisture content, appearance color, gas content, and particle size. Power companies typically take oil samples from power transformers periodically or irregularly for offline analysis to detect these parameters. However, the frequency of these tests is low, resulting in insufficient timeliness in monitoring transformer oil quality.

[0004] Therefore, the industry has proposed using multi-parameter sensors for transformer oil to monitor multiple parameters in the oil online. These devices integrate multiple sensors into one unit; however, the sensor responses inevitably shift after long-term operation, requiring periodic calibration. Summary of the Invention

[0005] This application provides a calibration platform and method for a transformer oil multi-parameter sensor to solve the problem that the transformer oil multi-parameter sensor needs to be calibrated regularly.

[0006] On one hand, this application provides a calibration platform for a transformer oil multi-parameter sensing device, the platform comprising: a standard new oil cup, an aged oil sample cup, a standard substance sample cup, a first straight-through valve, a second straight-through valve, a third straight-through valve, a micro-pump, a standard sample oil tank, a transformer oil multi-parameter sensing device, and a terminal; the standard sample oil tank includes an oil inlet and an oil outlet;

[0007] The inlet of the first straight-through valve is connected to the standard new oil cup via an oil pipeline; the inlet of the second straight-through valve is connected to the aged oil sample cup via an oil pipeline; and the inlet of the third straight-through valve is connected to the standard substance sample cup via an oil pipeline.

[0008] The oil outlets of the first straight-through valve, the second straight-through valve, and the third straight-through valve are connected together and then connected to the micro-pump; the micro-pump is connected to the oil inlet.

[0009] The oil outlet is connected to the transformer oil multi-parameter sensor, and the transformer oil multi-parameter sensor is communicatively connected to the terminal.

[0010] The transformer oil multi-parameter sensing device is used for:

[0011] The system detects the parameters of the new standard oil in the standard oil cup, the parameters of the standard substance in the standard substance sample cup, and the parameters of the aged oil sample in the aged oil sample cup; and sends the parameters of the new standard oil, the parameters of the standard substance, and the parameters of the aged oil sample to the terminal.

[0012] The terminal is used for:

[0013] Perform initial calibration based on standard new oil parameters;

[0014] Compare the standard substance parameters with the standard substance verification values; if the deviation between the standard substance parameters and the standard substance verification values ​​is less than the preset value, then formal calibration is performed;

[0015] The parameters of the aged oil sample are compared with those of the standard substance; if the deviation between the parameters of the aged oil sample and the standard substance exceeds a preset threshold, an anomaly message is generated.

[0016] Optionally, it also includes a microsyringe; the standard sample oil pool further includes a humidification channel, which is connected to the microsyringe. The microsyringe can inject water into the standard sample oil pool through the humidification channel.

[0017] Optionally, the system also includes a waste oil tank and an electromagnetic pump. The standard oil tank further includes a waste oil outlet, which is connected to the waste oil tank via the electromagnetic pump. Waste oil in the standard oil tank can be pumped out by the electromagnetic pump and sent to the paper waste oil tank, preventing waste oil from remaining in the standard oil tank and affecting subsequent use.

[0018] Optionally, the transformer oil multi-parameter sensor is connected to the waste oil tank. The waste oil detected by the transformer oil multi-parameter sensor is directly sent to the waste oil tank.

[0019] Optionally, the transformer oil multi-parameter sensing device includes a communication interface; the transformer oil multi-parameter sensing device is connected to the terminal through the communication interface.

[0020] Optionally, the terminal is further used for:

[0021] After adding oil sample to the standard new oil cup, control to open the first through valve and close the other two through valves; after adding oil sample to the standard substance sample cup, control to open the third through valve and close the other two through valves; after adding oil sample to the aged oil sample cup, control to open the second through valve and close the other two through valves.

[0022] Control the start of the micro-pump to inject a fixed amount of oil sample into the standard oil pool;

[0023] Control the microsyringe to inject a fixed amount of water into the standard oil pool;

[0024] After the moisture in the standard sample oil pool is balanced, a fixed amount of oil sample is injected into the transformer oil multi-parameter sensor.

[0025] Start the transformer oil multi-parameter sensing device to detect the parameters of the standard new oil, the parameters of the standard substance, and the parameters of the aged oil sample.

[0026] The straight-through valve design allows for the directional selection of oil samples into the standard oil pool.

[0027] Optionally, the terminal is further configured to: if the deviation between the standard substance parameters and the standard substance verification value is greater than a preset value, then redetermine the sensor's response function.

[0028] Optionally, the terminal is further configured to: in the step of redetermining the sensor's response function, prepare N oil samples in different states according to the range (Xmin, Xmax) of the parameter X in the oil to be measured, with X serving as the sensor's input quantity; the target parameter in the oil sample is Xmin. <X1,X2,…,Xn<Xmax;

[0029] Based on the oil sample, obtain the sensor response data set {F(X1)~F(XN)} under different target parameters;

[0030] Construct target parameters, and fit a polynomial F(x,y) = a1x to the sensor response output data set {F(x1,y)~F(xN,y)}. 0 +a2x 1 +a3x 2 +…+a m x m-1 ;

[0031] The coefficient values ​​{a1, a2, a3, ..., a...} of the fitted polynomial are obtained using the least squares method. m};

[0032] Since the input quantity, sensor response function, and output quantity satisfy the convolution relationship F(x)=W(x)*H(x), the sensor response function H(x) to the input parameter X can be obtained by computer inversion operation.

[0033] Optionally, the terminal is further configured to: in the step of redetermining the sensor's response function, control the terminal to input the sensor's response function H(x) to the transformer oil multi-parameter sensing device.

[0034] On the other hand, this application provides a calibration method for a transformer oil multi-parameter sensing device, the method comprising:

[0035] The parameters of the standard new oil in the standard new oil are detected by the transformer oil multi-parameter sensor; the parameters of the standard substance in the standard substance are detected by the transformer oil multi-parameter sensor; the parameters of the aged oil sample in the aged oil sample are detected by the transformer oil multi-parameter sensor; and the parameters of the standard new oil, standard substance, and aged oil sample are sent to the terminal by the transformer oil multi-parameter sensor.

[0036] Initial calibration was performed based on standard new oil parameters;

[0037] Compare the standard substance parameters with the standard substance verification values;

[0038] If the deviation between the standard substance parameters and the standard substance verification value is less than the preset value, then formal calibration is performed;

[0039] Compare the parameters of aged oil samples with those of standard substances;

[0040] If the parameters of the aged oil sample deviate from the parameters of the standard substance by more than a preset threshold, an abnormality message will be generated.

[0041] As can be seen from the above technical solutions, this application provides a calibration platform and method for a transformer oil multi-parameter sensing device. The platform includes: a standard new oil cup, an aged oil sample cup, a standard substance sample cup, a first straight-through valve, a second straight-through valve, a third straight-through valve, a micro-pump, a standard sample oil pool, a transformer oil multi-parameter sensing device, and a terminal. The standard new oil cup, the aged oil sample cup, and the standard substance sample cup are used to contain different types of oil samples. The sensing device is used to detect the parameters of the oil samples in the three oil cups and send the parameters to the terminal. The terminal calibrates the transformer oil multi-parameter sensing device based on the parameters, thereby solving the problem that the transformer oil multi-parameter sensing device needs to be calibrated periodically. Attached Figure Description

[0042] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the calibration platform for the transformer oil multi-parameter sensing device provided in the embodiments of this application;

[0044] Figure 2 This is a flowchart of the sensor response function acquisition provided in an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the calibration process for the transformer oil multi-parameter sensing device provided in the embodiments of this application;

[0046] Figure 4This is a schematic diagram of another transformer oil multi-parameter sensing device calibration process provided in an embodiment of this application.

[0047] Figure label:

[0048] 1-Standard new oil cup, 2-Aged oil sample cup, 3-Standard substance sample cup, 11-First straight-through valve, 22-Second straight-through valve, 33-Third straight-through valve, 4-Micro-injector, 5-Humidification channel, 6-Standard sample oil pool, 8-Oil inlet, 9-Oil outlet, 10-Waste oil outlet, 13-Electromagnetic pump, 12-Waste oil pool, 14-Micro-pump, 15-Transformer oil multi-parameter sensor, 16-Communication interface, 17-Terminal. Detailed Implementation

[0049] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0050] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0051] Transformer oil possesses excellent insulation, heat dissipation, and arc-extinguishing properties, and is commonly used in transformers, oil-immersed circuit breakers, and other oil-immersed electrical equipment. Transformer oil serves as the primary insulating medium for electrical equipment.

[0052] The quality of transformer oil can be monitored by detecting parameters within the oil. There are more than ten parameters that determine the quality of transformer oil, including oil breakdown voltage, volume resistivity, moisture content, appearance color, gas content, and particle size. Power companies typically take oil samples from power transformers periodically or irregularly for offline analysis to detect these parameters. However, the frequency of these tests is low, resulting in insufficient timeliness in monitoring transformer oil quality.

[0053] Therefore, the industry has proposed using multi-parameter sensors for transformer oil to monitor multiple parameters in the oil online. These devices integrate multiple sensors into one unit; however, the sensor responses inevitably shift after long-term operation, requiring periodic calibration.

[0054] To address the issue of periodic calibration required for transformer oil multi-parameter sensors, this application provides a calibration platform for such sensors, such as... Figure 1The diagram shown is a schematic of a calibration platform for a transformer oil multi-parameter sensor provided in this application embodiment. The calibration platform includes: a standard new oil cup 1, an aged oil sample cup 2, a standard substance sample cup 3, a first direct-flow valve 11, a second direct-flow valve 22, a third direct-flow valve 33, a micro-pump 14, a standard sample oil tank 6, a transformer oil multi-parameter sensor 15, and a terminal 17; the standard sample oil tank 6 includes an inlet 8 and an outlet 9.

[0055] The inlet of the first straight-through valve 11 is connected to the standard new oil cup 1 through an oil pipeline; the inlet of the second straight-through valve 22 is connected to the aged oil sample cup 2 through an oil pipeline; and the inlet of the third straight-through valve 33 is connected to the standard substance sample cup 3 through an oil pipeline.

[0056] The oil outlets of the first straight-through valve 11, the second straight-through valve 22, and the third straight-through valve 33 are connected together and then connected to the micro-pump 14; the micro-pump 14 is connected to the oil inlet 8.

[0057] The oil outlet 9 is connected to the transformer oil multi-parameter sensor 15, and the transformer oil multi-parameter sensor 15 is communicatively connected to the terminal 17.

[0058] In some embodiments, the standard new oil cup 1 is used to hold standard new oil that has been identified as unused. It can be flexibly selected according to the type of transformer oil actually used in the transformer. For example, different grades of transformer oil such as 25#, 45#, and 50# can be selected.

[0059] In some embodiments, the aging oil sample cup 2 is used to hold the aged transformer oil, which can be an aged oil sample taken from an in-service transformer or an oil sample that has undergone artificial accelerated aging. In this embodiment, an oil sample that has undergone artificial accelerated aging for 60 days is selected.

[0060] In some embodiments, the standard material sample cup 3 is used to hold a standard oil sample whose transformer oil parameters have been fixed after verification. It can be flexibly selected according to the actual multi-parameter monitorable parameters of the transformer oil, such as standard particulate matter or oil sample containing a certain amount of hydrogen, for calibrating specific oil parameters.

[0061] The first straight-through valve 11 is used to control the flow of the standard new oil cup 1 pipeline; the second straight-through valve 22 is used to control the flow of the aged oil sample cup 2 pipeline; and the third straight-through valve 33 is used to control the flow of the standard substance sample cup 3. The straight-through valves allow for the directional selection of samples entering the standard oil pool 6.

[0062] In some embodiments, by opening one of the through valves and closing the other two through valves, and starting the micro pump 14, a quantitative oil sample can be injected into the standard sample oil pool 6.

[0063] The standard sample oil tank 6 is equipped with a humidification channel 5. The micro-injector 4 can inject a certain amount of water into the standard sample oil tank 6 through the humidification channel 5 to control the water content of the oil sample in the standard sample oil tank 6.

[0064] In some embodiments, the humidification channel is a sealed structure, such as a rubber stopper or a mechanical rotating stopper. In this embodiment, a rubber stopper is selected, and the micro-syringe is a 1 mL syringe.

[0065] In some embodiments, the transformer oil multi-parameter sensor calibration platform further includes a waste oil tank 12 and an electromagnetic pump 13. The standard sample oil tank 6 also includes a waste oil outlet 10, which is connected to the waste oil tank 12 via the electromagnetic pump 13. The transformer oil multi-parameter sensor 15 is connected to the waste oil tank 12.

[0066] Waste oil in the standard sample oil pool 6 and the transformer oil multi-parameter sensor 15 is discharged into the waste oil pool 12 through oil pipelines to ensure that there is no waste oil in the standard sample oil pool 6 and the transformer oil multi-parameter sensor 15, so as to avoid affecting subsequent use.

[0067] The transformer oil multi-parameter sensor 15 is equipped with a communication interface 16; the transformer oil multi-parameter sensor 15 is connected to the terminal 17 via the communication interface 16. The transformer oil multi-parameter sensor 15 can transmit oil sample parameters to the terminal 17 through the communication interface 16.

[0068] In this embodiment, as Figure 3 As shown, the calibration process for the transformer oil multi-parameter sensor is as follows:

[0069] Add unused, tested standard new oil to a 200mL standard new oil cup 1. The type of standard new oil is No. 25 transformer oil.

[0070] Add the aged oil sample to 200 mL of aged oil sample cup 2. Select an oil sample that has been artificially accelerated aged for 60 days.

[0071] Add a standard oil sample with fixed oil parameters to the standard material sample cup 3, and select the particle size standard material of NAS 1638.

[0072] Open the first direct-flow valve 11, close the second direct-flow valve 22 and the third direct-flow valve 33, and start the micro-pump 14 to inject a fixed amount of oil sample into the standard sample oil pool 6;

[0073] After the transformer oil multi-parameter sensor 15 extracts an oil sample from the standard oil pool 6 through the oil outlet 9, it detects various parameters in the new standard oil and sends the parameters of the new standard oil to the terminal 17.

[0074] The oil sample in the standard oil pool 6 is pumped out to the waste oil pool 12 by the electromagnetic pump 13, and the waste oil in the transformer oil multi-parameter sensor 15 automatically flows into the waste oil pool 12.

[0075] Terminal 17 received the standard new oil parameters and completed the initial calibration;

[0076] 1 mL of water is injected into the standard oil reservoir 6 through the microsyringe 4, and the water balance is waited for.

[0077] The moisture content in unused standard new oil is detected by the transformer oil multi-parameter sensor 15.

[0078] Open the third straight-through valve 33, close the first straight-through valve 11 and the second straight-through valve 22, and start the micro-pump 14 to inject a fixed amount of oil sample into the standard sample oil pool 6;

[0079] The transformer oil multi-parameter sensor 15 extracts an oil sample from the standard sample oil pool 6 through the oil outlet 9, detects various parameters in the standard substance sample through the transformer oil multi-parameter sensor 15, and sends the standard substance parameters to the terminal 17.

[0080] The oil sample in the standard oil pool 6 is pumped out to the waste oil pool 12 by the electromagnetic pump 13; the waste oil in the transformer oil multi-parameter sensor 15 automatically flows into the waste oil pool 12.

[0081] After receiving the standard substance parameters, terminal 17 compares the standard substance parameters with the standard substance verification values; if the deviation between the standard substance parameters and the standard substance verification values ​​is less than the preset value, then formal calibration is performed.

[0082] Open the second straight-through valve 22, close the first straight-through valve 11 and the third straight-through valve 33, and start the micro-pump 14 to inject a fixed amount of oil sample into the standard sample oil pool 6;

[0083] The transformer oil multi-parameter sensor 15 extracts an oil sample from the standard oil pool 6 through the oil outlet 9, detects various parameters in the aged oil sample through the transformer oil multi-parameter sensor 15, and sends the parameters of the aged oil sample to the terminal 17.

[0084] The oil sample in the standard oil pool 6 is pumped out to the waste oil pool 12 by the electromagnetic pump 13; the waste oil in the transformer oil multi-parameter sensor 15 automatically flows into the waste oil pool 12.

[0085] After receiving the parameters of the aged oil sample, the terminal 17 compares the parameters of the aged oil sample with the parameters of the standard substance; if the deviation between the parameters of the aged oil sample and the parameters of the standard substance is greater than a preset threshold, an abnormal information is generated.

[0086] In some embodiments, such as Figure 4As shown, if the deviation between the standard substance parameters and the standard substance verification value is greater than the preset value, the response function of the sensor in the transformer oil multi-parameter sensing device needs to be re-determined, and the sensor response function is input to the transformer oil multi-parameter sensing device 15 through the terminal 17.

[0087] The process of redetermining the sensor response function is as follows: Figure 2 As shown, based on the measurement range (Xmin, Xmax) of parameter X in the oil to be tested, N oil samples in different states are prepared, with X serving as the input quantity to the sensor; the target parameter in the oil sample is Xmin. <X1,X2,…,Xn<Xmax;

[0088] Based on the oil sample, obtain the sensor response data set {F(X1)~F(XN)} under different target parameters;

[0089] Construct target parameters, and fit a polynomial F(x,y) = a1x to the sensor response output data set {F(x1,y)~F(xN,y)}. 0 +a2x 1 +a3x 2 +…+a m x m-1 ;

[0090] The coefficient values ​​{a1, a2, a3, ..., a...} of the fitted polynomial are obtained using the least squares method. m};

[0091] Since the input quantity, sensor response function, and output quantity satisfy the convolution relationship F(x)=W(x)*H(x), the sensor response function H(x) to the input parameter X can be obtained by computer inversion operation;

[0092] The control terminal 17 inputs the sensor response function H(x) to the transformer oil multi-parameter sensing device 15.

[0093] In some embodiments, this application also provides a method for calibrating a transformer oil multi-parameter sensing device, including:

[0094] The parameters of the standard new oil in the standard new oil are detected by the transformer oil multi-parameter sensor; the parameters of the standard substance in the standard substance are detected by the transformer oil multi-parameter sensor; the parameters of the aged oil sample in the aged oil sample are detected by the transformer oil multi-parameter sensor; and the parameters of the standard new oil, standard substance, and aged oil sample are sent to the terminal by the transformer oil multi-parameter sensor.

[0095] Initial calibration was performed based on standard new oil parameters;

[0096] Compare the standard substance parameters with the standard substance verification values; if the deviation between the standard substance parameters and the standard substance verification values ​​is less than the preset value, then formal calibration is performed;

[0097] The parameters of the aged oil sample are compared with those of the standard substance; if the deviation between the parameters of the aged oil sample and the standard substance exceeds a preset threshold, an anomaly message is generated.

[0098] As can be seen from the above technical solutions, this application provides a calibration platform and method for a transformer oil multi-parameter sensor device. The platform includes: a standard new oil cup 1, an aged oil sample cup 2, a standard substance sample cup 3, a first direct-flow valve 11, a second direct-flow valve 22, a third direct-flow valve 33, a micro-pump 14, a standard sample oil pool 6, a transformer oil multi-parameter sensor device 15, and a terminal 17. The standard new oil cup 1, the aged oil sample cup 2, and the standard substance sample cup 3 are used to hold different types of oil samples. The transformer oil multi-parameter sensor device 15 is used to detect the parameters of the oil samples in the three types of oil cups and send the parameters to the terminal 17. The terminal 17 calibrates the transformer oil multi-parameter sensor device 15 according to the parameters, thereby solving the problem that the transformer oil multi-parameter sensor device needs to be calibrated periodically.

[0099] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A calibration platform for a multi-parameter sensor device for transformer oil, characterized in that, include: The system includes a standard new oil cup (1), an aged oil sample cup (2), a standard substance sample cup (3), a first straight-through valve (11), a second straight-through valve (22), a third straight-through valve (33), a micro-pump (14), a standard sample oil tank (6), a transformer oil multi-parameter sensing device (15), and a terminal (17); the standard sample oil tank (6) includes an oil inlet (8) and an oil outlet (9); The inlet of the first straight-through valve (11) is connected to the standard new oil cup (1) through an oil pipeline; the inlet of the second straight-through valve (22) is connected to the aged oil sample cup (2) through an oil pipeline; the inlet of the third straight-through valve (33) is connected to the standard substance sample cup (3) through an oil pipeline. The oil outlets of the first straight-through valve (11), the second straight-through valve (22), and the third straight-through valve (33) are connected together to the micro-pump (14); the micro-pump (14) is connected to the oil inlet (8); The oil outlet (9) is connected to the transformer oil multi-parameter sensor (15), and the transformer oil multi-parameter sensor (15) is communicatively connected to the terminal (17). The transformer oil multi-parameter sensing device (15) is used for: The standard parameters of the new oil in the test cup (1) are as follows: The parameters of the standard substance in the standard substance sample cup (3) were tested; The parameters of the aged oil sample in (2) were detected in the oil cup; The standard new oil parameters, the standard substance parameters, and the aged oil sample parameters are sent to the terminal (17); The terminal (17) is used for: Perform initial calibration based on standard new oil parameters; Compare the parameters of the standard substance with the calibration values ​​of the standard substance; If the deviation between the standard substance parameters and the standard substance verification value is less than the preset value, then formal calibration is performed; The parameters of the aged oil sample were compared with those of the standard substance. If the parameters of the aged oil sample deviate from the parameters of the standard substance by a preset threshold, an anomaly message is generated.

2. The transformer oil multi-parameter sensing device calibration platform according to claim 1, characterized in that, It also includes a micro-injector (4); the standard sample oil pool (6) also includes a humidification channel (5), which is connected to the micro-injector (4).

3. The transformer oil multi-parameter sensing device calibration platform according to claim 1, characterized in that, It also includes a waste oil tank (12) and an electromagnetic pump (13). The standard sample oil tank (6) also includes a waste oil outlet (10), which is connected to the waste oil tank (12) through the electromagnetic pump (13).

4. The transformer oil multi-parameter sensing device calibration platform according to claim 3, characterized in that, The transformer oil multi-parameter sensing device (15) is connected to the waste oil pool (12).

5. The transformer oil multi-parameter sensing device calibration platform according to claim 1, characterized in that, The transformer oil multi-parameter sensing device (15) includes a communication interface (16), and the transformer oil multi-parameter sensing device (15) is communicatively connected to the terminal (17) through the communication interface (16).

6. The transformer oil multi-parameter sensing device calibration platform according to claim 1, characterized in that, The terminal (17) is also used for: After adding an oil sample to the standard new oil cup (1), control the opening of the first through valve (11) and close the other two through valves; after adding an oil sample to the standard substance sample cup (3), control the opening of the third through valve (33) and close the other two through valves; after adding an oil sample to the aged oil sample cup (2), control the opening of the second through valve (22) and close the other two through valves. Control the start of the micro-pump (14) to inject a fixed amount of oil sample into the standard oil pool (6); The microsyringe (4) is controlled to inject a fixed amount of water into the standard oil reservoir (6); After the moisture in the standard sample oil pool (6) is balanced, a fixed amount of oil sample is injected into the transformer oil multi-parameter sensing device (15) from the standard sample oil pool (6). Start the transformer oil multi-parameter sensing device (15) to detect the parameters of the standard new oil, the parameters of the standard substance and the parameters of the aged oil sample.

7. The transformer oil multi-parameter sensing device calibration platform according to claim 1, characterized in that, The terminal (17) is also used for: If the deviation between the standard substance parameters and the standard substance calibration value is greater than the preset value, the sensor response function should be redefined.

8. The transformer oil multi-parameter sensing device calibration platform according to claim 7, characterized in that, The terminal (17) is also used for: In the step of redetermining the sensor's response function, N oil samples in different states are prepared according to the range (Xmin, Xmax) of the parameter X in the oil to be measured, with X serving as the sensor's input quantity; the target parameter in the oil sample is Xmin. <X1,X2,…,Xn<Xmax; The response data set {F(X1)~F(XN)} of the sensor under different target parameters was obtained based on the oil sample; Construct the target parameters, and fit the polynomial F(x,y) = a1x to the sensor response output data set {F(x1,y)~F(xN,y)}. 0 +a2x 1 +a3x 2 +…+a m x m-1 ; Using the least squares method, the coefficient values ​​{a1, a2, a3, ..., a...} of the fitted polynomial are obtained. m }; Since the input, sensor response function, and output satisfy a convolution relationship F(x)=W(x) H(x) is obtained by inverting the expression using a computer to obtain the sensor's response function to the input parameter X.

9. The transformer oil multi-parameter sensing device calibration platform according to claim 7, characterized in that, The terminal (17) is also used for: In the step of redetermining the sensor's response function, the terminal (17) is controlled to input the sensor's response function H(x) into the transformer oil multi-parameter sensing device (15).

10. A calibration method for a multi-parameter sensor device for transformer oil, characterized in that, include: The parameters of standard new oil in standard new oil are detected by a multi-parameter sensor for transformer oil. The parameters of the standard substance in the standard substance were detected by a multi-parameter sensor for transformer oil. The parameters of aged oil samples were detected using a transformer oil multi-parameter sensor. The transformer oil multi-parameter sensor sends the parameters of standard new oil, standard substance, and aged oil sample to the terminal. Initial calibration was performed based on standard new oil parameters; Compare the parameters of the standard substance with the calibration values ​​of the standard substance; If the deviation between the standard substance parameters and the standard substance verification value is less than the preset value, then formal calibration is performed; The parameters of the aged oil sample were compared with those of the standard substance. If the deviation between the parameters of the aged oil sample and the parameters of the standard substance is greater than a preset threshold, an abnormality message is generated; The terminal is used for: If the deviation between the standard substance parameters and the standard substance calibration value is greater than the preset value, the sensor response function should be redefined. The terminal is also used for: In the step of redetermining the sensor's response function, N oil samples in different states are prepared according to the range (Xmin, Xmax) of the parameter X in the oil to be measured, with X serving as the sensor's input quantity; the target parameter in the oil sample is Xmin. <X1,X2,…,Xn<Xmax; The response data set {F(X1)~F(XN)} of the sensor under different target parameters was obtained based on the oil sample; Construct the target parameters, and fit the polynomial F(x,y) = a1x to the sensor response output data set {F(x1,y)~F(xN,y)}. 0 +a2x 1 +a3x 2 +…+a m x m-1 ; Using the least squares method, the coefficient values ​​{a1, a2, a3, ..., a...} of the fitted polynomial are obtained. m }; Since the input, sensor response function, and output satisfy a convolution relationship F(x)=W(x) H(x) is obtained by inverting the expression using a computer to obtain the sensor's response function to the input parameter X.

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