On-site rapid verification and judgment method and device for converter transformer grid-side hydrogen sensor

Abstract

The invention discloses an on-site rapid verification judgment method and device for a converter transformer network side hydrogen sensor, and relates to the technical field of on-site hydrogen online monitoring device verification, and the verification steps are as follows: 1, respectively injecting low-concentration and high-concentration standard oil samples into a low-concentration oil cylinder and a high-concentration oil cylinder in a laboratory, and purging the verification oil cylinder with air; step 2, injecting a standard oil sample in the low-concentration oil cylinder into the checking oil cylinder on site, and manually sampling to obtain a standard value; meanwhile, a hydrogen sensor is used for online detection to obtain a verification value; thirdly, after the low-concentration oil sample verification is finished, the standard oil sample in the verification oil cylinder is pumped out and injected back into the low-concentration oil cylinder, and meanwhile the verification oil cylinder is purged clean through air; 4, detecting the high-concentration oil sample according to the low-concentration oil sample detection method to obtain a detection result; 5, comparing the verification value with the standard value, and judging whether the performance of the hydrogen sensor meets the operation requirement or not; the performance of the hydrogen sensor can be quickly verified on site, whether the performance of the hydrogen sensor can meet operation or not is judged, and reliability is provided for safe operation of the high-voltage bushing on the converter transformer grid side.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen sensor calibration, and in particular to a method and device for quickly calibrating and judging a hydrogen sensor on the grid side of a converter transformer. The method and device are used for regularly calibrating the performance of the hydrogen sensor on the spot to ensure the normal operation of the device. Background Art

[0002] The high-voltage bushing on the commutation grid side is the main component of the commutation transformer, which is composed of an iron core, insulating paper, insulating oil, etc. After the commutation transformer is put into operation, due to changes in operating conditions, the high-voltage bushing often suffers from faults such as overheating or partial discharge, causing the insulating oil to degrade and produce components such as hydrogen.

[0003] The online monitoring device for hydrogen in the insulating oil of the high-voltage bushing on the grid side of the converter transformer is one of the online monitoring devices for the operation of the converter transformer. It mainly monitors the changes in the hydrogen content of the insulating oil in the high-voltage bushing on the grid side, so as to judge the operating status of the high-voltage bushing.

[0004] The online monitoring device for hydrogen in the insulating oil of the high-voltage bushing on the transformer grid side can monitor the changes in the hydrogen content in the insulating oil of the high-voltage bushing in real time. The detection data is timely and accurate, and is used to evaluate the operation of the high-voltage bushing, determine whether there are latent faults, determine the type of fault and take measures to prevent the accident from further expanding. However, if the online monitoring device for hydrogen in the insulating oil of the high-voltage bushing on the transformer grid side is running for a long time, problems such as drift of detection data or increased measurement errors will occur.

[0005] Therefore, the performance of the hydrogen sensor must be regularly calibrated on site to ensure the operating status of the device.

[0006] At present, due to the lack of on-site rapid calibration and judgment methods and devices for hydrogen sensors in the high-voltage bushing insulating oil on the converter transformer grid side, the on-site calibration of the online monitoring device for hydrogen in the high-voltage bushing insulating oil on the converter transformer grid side cannot be carried out. The quality of the hydrogen sensor can only be judged by whether there is detection data in the background, and whether the detection data is accurate cannot be determined, and cannot provide a basis for equipment maintenance and management. Summary of the invention

[0007] The technical problem to be solved by the present invention is to address the deficiencies in the prior art and disclose a method for quickly verifying and judging the hydrogen sensor in the insulating oil of the high-voltage bushing on the transformer grid side, thereby solving the problem of regularly verifying the performance of the hydrogen sensor on site to ensure the normal operation of the device.

[0008] To achieve the above objectives, the present invention implements a method and device for quickly verifying a hydrogen sensor in the insulating oil of a high-voltage bushing on the commutation network side through the following technical scheme, including the following verification steps:

[0009] Step (1): In the laboratory, inject a low-concentration standard oil sample and a high-concentration standard oil sample into the low-concentration oil cylinder and the high-concentration oil cylinder respectively, and blow the calibration oil cylinder clean with air;

[0010] Step (2): injecting the low-concentration standard oil sample in the low-concentration oil cylinder into the calibration oil cylinder on site, performing manual sampling and offline testing, thereby obtaining the standard value of the low-concentration oil sample; at the same time, using a hydrogen sensor for testing, first inserting the hydrogen sensor into the calibration station for stirring, stirring for 10 minutes, and then resting for 30 minutes before testing, and obtaining the calibration value of the low-concentration oil sample after the test is completed;

[0011] Step (3): After the calibration of the low-concentration standard oil sample is completed, the low-concentration standard oil sample in the calibration oil cylinder is extracted and injected back into the low-concentration oil cylinder, and the calibration oil cylinder is purged with air at the same time;

[0012] Step (4): injecting the high-concentration standard oil sample in the high-concentration oil cylinder into the calibration oil cylinder, performing manual sampling and offline testing to obtain the standard value of the high-concentration oil sample, inserting the hydrogen sensor into the calibration station, stirring for 10 minutes, and then starting the test after being left still for 30 minutes, and obtaining the calibration value of the high-concentration oil sample after the test is completed;

[0013] Step (5): Determine whether the performance of the hydrogen sensor meets the operating requirements by comparing the calibration value of the hydrogen sensor with the standard value of the standard oil sample.

[0014] Further:

[0015] The volumes of the low-concentration oil cylinder, the high-concentration oil cylinder and the calibration oil cylinder are all 5000 ml, and the volumes of the low-concentration and high-concentration standard oil samples are ≤5000 ml; the air purge time in step 1 is 5 minutes.

[0016] Further:

[0017] In the step (2), before the calibration measurement, the hydrogen sensor is removed and repaired on site;

[0018] The low-concentration standard oil sample in the low-concentration oil cylinder is injected into the calibration oil cylinder through an oil pump and stirred for 30 minutes. After stirring, the oil is left to stand for 10 minutes to eliminate bubbles in the oil.

[0019] Further:

[0020] In the step (2), the manual sampling offline detection is repeated twice, and the average of the two measurement results is taken to obtain the standard value of the standard oil sample;

[0021] The hydrogen sensor performs two online detection and repeated measurements, and an average of the two measurement results is taken to obtain the hydrogen sensor calibration value;

[0022] After the calibration of the hydrogen sensors in this batch is completed, continue to calibrate the next batch of low-concentration sensors according to the above steps until all calibrations are completed.

[0023] Further:

[0024] In step (3) and step (4), according to the low-concentration calibration method of step (2), the low-concentration standard oil sample is replaced with the high-concentration standard oil sample to obtain a high-concentration calibration value of the hydrogen sensor;

[0025] After the calibration of this batch of sensors is completed, continue to calibrate the next batch of high-concentration sensors according to the above steps until all calibrations are completed.

[0026] Further:

[0027] In step (5), the calibration value of the hydrogen sensor is compared with the standard value of the standard oil sample to determine whether the performance of the hydrogen sensor in the high-voltage bushing insulating oil on the converter transformer grid side meets the working requirements. The calibration error calculation formula and judgment model are as follows:

[0028] Formula 1: E a =C 0 -C 1 ;

[0029] Formula 2: E r =C 0 -C 1 / C 1 ;

[0030] In Formula 1 and Formula 2, E a is the absolute error, C 0 is the calibration value of the hydrogen sensor; C l is the standard value of the standard oil sample; E r is the relative error;

[0031] The judgment model includes two types:

[0032] Type 1: When the detection range is 5-150 μL / L, the calibration error also meets E a ≤±5μL / L and E r ≤±20%, or meet E a ≤±5μL / L, E rWhen the larger of the two conditions is ≤±20%, it indicates that the performance of the hydrogen sensor in the insulating oil of the high-voltage bushing on the converter transformer grid side meets the working requirements; otherwise, the device should be repaired or replaced.

[0033] Type 2: When the detection range is 150 - 5000 μL / L and the calibration error satisfies Er≤±20%, it indicates that the performance of the hydrogen sensor in the high-voltage bushing insulating oil on the converter transformer grid side meets the working requirements; otherwise, the device should be repaired or replaced.

[0034] Further:

[0035] The device comprises the low-concentration oil cylinder, the high-concentration oil cylinder, the calibration oil cylinder, the waste gas and waste oil cylinder, a solenoid valve, an exhaust pipe, an oil injection pump, a three-way valve, an air intake valve, an air pump and a manual sampling valve;

[0036] The number of the solenoid valves is 13, the number of the exhaust pipes is 3, the number of the oil injection pumps is 5, and the number of the three-way valves is 2;

[0037] The inlet of the low-concentration oil cylinder is connected to exhaust pipe 1 and solenoid valve 1 in sequence, and at the same time, solenoid valve 2 and oil filling pipe 1 are connected in parallel to the inlet of the low-concentration oil cylinder;

[0038] The inlet of the low-concentration oil cylinder and the inlet of the calibration oil cylinder are fixedly connected through the electromagnetic valve five, the three-way valve one, the oil injection pump one and the electromagnetic valve seven;

[0039] The outlet of the low-concentration oil cylinder and the inlet of the calibration oil cylinder are fixedly connected through the electromagnetic valve thirteen, the three-way valve two, the oil injection pump two and the electromagnetic valve eleven;

[0040] The inlet of the high-concentration oil cylinder is connected to the solenoid valve 3 and the exhaust pipe 2 in sequence, and at the same time, the solenoid valve 4 and the oil injection pipe 2 are connected in parallel to the inlet of the high-concentration oil cylinder;

[0041] The inlet of the high-concentration oil cylinder is fixedly connected to the solenoid valve 6 and the three-way valve 1 is fixedly connected to the inlet of the low-concentration oil cylinder;

[0042] The outlet of the high-concentration oil cylinder is fixedly connected to the inlet of the calibration oil cylinder through an electromagnetic valve 12.

[0043] Further:

[0044] The calibration oil cylinder is equipped with a pressure gauge, a hydrogen sensor, a solenoid valve 8 and an exhaust pipe 3, and the bottom of the calibration oil cylinder is equipped with an artificial sampling valve.

[0045] The hydrogen sensor is fixedly connected to the data acquisition module;

[0046] The outlet of the calibration oil cylinder is fixedly connected with the solenoid valve 9, the air intake pipe and the air pump in sequence;

[0047] The outlet of the calibration oil cylinder is fixedly connected to the waste gas and waste oil cylinder via a solenoid valve ten and an oil injection pump three.

[0048] Further:

[0049] The hydrogen sensor is provided with a calibration station, and the number of the calibration stations is generally 3.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention provides a device for on-site rapid verification of an online monitoring device for a hydrogen sensor on the grid side of a converter transformer in a converter station. The device can quickly verify the performance of the hydrogen sensor on-site, determine whether its performance can meet the operation requirements, discover abnormal situations in time, and conduct effective early warning and intervention. At the same time, the operation level and reliability of the device are improved, providing reliable guarantee for the safe operation of the converter transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a flow chart of the online calibration steps of the hydrogen sensor of the present invention;

[0053] Figure 2 It is a structural schematic diagram of the online calibration device for hydrogen sensors of the present invention;

[0054] Figure 3 Comparison results of online calibration test data of hydrogen sensors.

[0055] Description of reference numerals:

[0056] 1- low concentration oil cylinder, 2- solenoid valve 1, 3- exhaust pipe 1, 4- solenoid valve 2, 5- oil injection pipe 1, 6- high concentration oil cylinder, 7- solenoid valve 3, 8- exhaust pipe 2, 9- solenoid valve 4, 10- oil injection pipe 2, 11- solenoid valve 5, 12- solenoid valve 6, 13- three-way valve 1, 14- oil injection pump 1, 15- solenoid valve 7, 16- calibration oil cylinder, 17- hydrogen sensor, 18- data acquisition module, 19- pressure gauge, 20- solenoid valve 8, 21- exhaust pipe 3, 22- solenoid valve 9, 23- intake pipe, 24- air pump, 25- manual sampling valve, 26- solenoid valve 10, 27- oil injection pump 3, 28- waste gas and waste oil oil cylinder, 29- solenoid valve 12, 30- oil injection pump 2, 31- three-way valve 2, 32- solenoid valve 12, 33- solenoid valve 13. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] like Figure 1 As shown, it shows a flow chart of the verification steps of the present invention, including the following verification steps:

[0059] Step (1): In the laboratory, inject a low-concentration standard oil sample and a high-concentration standard oil sample into the low-concentration oil cylinder and the high-concentration oil cylinder respectively, and blow the calibration oil cylinder clean with air;

[0060] Step (2): injecting the low-concentration standard oil sample in the low-concentration oil cylinder into the calibration oil cylinder on site, performing manual sampling and offline testing, thereby obtaining the standard value of the low-concentration oil sample; at the same time, using a hydrogen sensor for testing, first inserting the hydrogen sensor into the calibration station for stirring, stirring for 10 minutes, and then resting for 30 minutes before testing, and obtaining the calibration value of the low-concentration oil sample after the test is completed;

[0061] Step (3): After the calibration of the low-concentration standard oil sample is completed, the low-concentration standard oil sample in the calibration oil cylinder is extracted and injected back into the low-concentration oil cylinder, and the calibration oil cylinder is purged with air at the same time;

[0062] Step (4): injecting the high-concentration standard oil sample in the high-concentration oil cylinder into the calibration oil cylinder, performing manual sampling and offline testing to obtain the standard value of the high-concentration oil sample, inserting the hydrogen sensor into the calibration station, stirring for 10 minutes, and then starting the test after being left still for 30 minutes, and obtaining the calibration value of the high-concentration oil sample after the test is completed;

[0063] Step (5): Determine whether the performance of the hydrogen sensor meets the operating requirements by comparing the calibration value of the hydrogen sensor with the standard value of the standard oil sample.

[0064] like Figure 2 As shown, it shows a schematic diagram of the structure of the device of the present invention, including the low-concentration oil cylinder (1), the high-concentration oil cylinder 6, the calibration oil cylinder 16, the waste gas and waste oil cylinder 28, a solenoid valve, an exhaust pipe, an oil injection pump, a three-way valve, an air intake valve 23, an air pump 24 and a manual sampling valve 25;

[0065] The number of the solenoid valves is 13, the number of the exhaust pipes is 3, the number of the oil injection pumps is 5, and the number of the three-way valves is 2;

[0066] The inlet of the low-concentration oil cylinder 1 is connected to the exhaust pipe 1 3 and the solenoid valve 1 2 in sequence, and at the same time, the solenoid valve 2 4 and the oil filling pipe 1 5 are connected in parallel to the inlet of the low-concentration oil cylinder 1;

[0067] The inlet of the low-concentration oil cylinder 1 is fixedly connected to the inlet of the calibration oil cylinder 16 through the electromagnetic valve 5 11, the three-way valve 13, the oil injection pump 14 and the electromagnetic valve 7 15;

[0068] The outlet of the low-concentration oil cylinder 1 and the inlet of the calibration oil cylinder 16 are fixedly connected through the electromagnetic valve thirteen 33, the three-way valve two 31, the oil injection pump two 30 and the electromagnetic valve eleven 29;

[0069] The inlet of the high-concentration oil cylinder 6 is connected to the solenoid valve 3 7 and the exhaust pipe 2 8 in sequence, and at the same time, the solenoid valve 4 9 and the oil injection pipe 2 10 are connected in parallel to the inlet of the high-concentration oil cylinder 6;

[0070] The inlet of the high-concentration oil cylinder 6 is fixedly connected to the solenoid valve 6 12 and the three-way valve 1 13 is fixedly connected to the inlet of the low-concentration oil cylinder 1;

[0071] The outlet of the high-concentration oil cylinder 6 is fixedly connected to the inlet of the calibration oil cylinder 16 via a solenoid valve 12 32 .

[0072] The calibration oil cylinder 16 is equipped with a pressure gauge 19, a hydrogen sensor 17, a solenoid valve 8 20 and an exhaust pipe 3 21. The bottom of the calibration oil cylinder 16 is equipped with an artificial sampling valve 25.

[0073] The hydrogen sensor 17 is fixedly connected to the data acquisition module 18;

[0074] The outlet of the calibration oil cylinder 16 is fixedly connected to the solenoid valve 9 22, the air intake pipe 23 and the air pump 24 in sequence;

[0075] The outlet of the calibration oil cylinder 16 is fixedly connected to the waste gas and waste oil cylinder 28 via a solenoid valve 10 26 and an oil injection pump 3 27 .

[0076] The hydrogen sensor 17 is provided with a calibration station, the number of which is generally 3, which can be increased or decreased according to actual needs in actual projects.

[0077] The specific operation process of the inspection device is as follows:

[0078] When the standard oil sample is injected into the oil cylinder in the laboratory, the oil inlet pipe 15 is connected to the oil distribution device, the solenoid valve 5 11 is closed, the solenoid valve 2 4 and the solenoid valve 1 2 are opened, and the low-concentration standard oil sample is injected into the low-concentration oil cylinder 1; after completion, the oil inlet pipe 15 is separated from the oil distribution device, and the solenoid valve 2 4 and the solenoid valve 1 2 are closed;

[0079] In the laboratory, when the standard oil sample is injected into the oil cylinder, the oil inlet pipe 2 10 is connected to the oil distribution device, the solenoid valve 6 12 is closed, the solenoid valve 4 9 and the solenoid valve 3 7 are opened, and the high-concentration standard oil sample is injected into the high-concentration oil cylinder 6; after completion, the oil inlet pipe 2 10 is separated from the oil distribution device, and the solenoid valve 4 9 and the solenoid valve 3 7 are closed;

[0080] At the scene, when the hydrogen sensor 17 performs low-concentration standard oil sample calibration, when the solenoid valve five 11 and the solenoid valve seven 15 are opened, the three-way valve one 13 is automatically switched to keep the oil outlet pipeline of the low-concentration oil cylinder 1 to the calibration oil cylinder 16 unobstructed, the solenoid valve six 12 is automatically closed, the solenoid valve eight 20 is opened, the solenoid valve nine 22, the solenoid valve ten 25 and the solenoid valve eleven 26 are closed, the oil injection pump one 14 is started to inject the standard oil sample in the low-concentration oil cylinder 1 into the calibration oil cylinder 16, and the oil injection is stopped when the volume of the standard oil sample is 4000-5000ml, the solenoid valve seven 15 is closed, and the hydrogen sensor 17 is inserted into the calibration station, stirred for 10 minutes, and left to stand for 30 minutes;

[0081] Open the solenoid valve + 25, manually sample 40 mL, flush the pipeline with about 20 mL of oil before sampling, and then close the solenoid valve + 25; repeat the offline detection of the 40 mL sample twice, and take the average of the test results obtained from the two measurements to obtain the standard value of the standard oil sample; start the hydrogen sensor 17 for online detection and repeat the measurement twice, and take the average of the test results obtained from the two measurements to obtain the calibration value of the hydrogen sensor.

[0082] Open the solenoid valve 12 29 and the solenoid valve 14 33, the three-way valve 2 31 automatically switches to keep the oil outlet pipeline of the calibration oil cylinder 16 to the low-concentration oil cylinder 1 unobstructed, the solenoid valve 13 32 automatically closes, open the solenoid valve 1 2, start the oil injection pump 2 30, and inject the standard oil sample in the calibration oil cylinder 16 into the low-concentration oil cylinder 1;

[0083] After the calibration oil cylinder 16 is emptied, the solenoid valve 12 29, the solenoid valve 14 33 and the solenoid valve 1 2 are closed, the solenoid valve 9 22 is opened, the air pump 24 is started, and the air is purged for more than 5 minutes;

[0084] When calibrating the high-concentration standard oil sample of the hydrogen sensor on site, follow the calibration method of the low-concentration standard oil sample;

[0085] Finally, according to the standard values ​​of high and low standard oil samples and the detection value of the hydrogen sensor, the absolute error and relative error are calculated to determine whether the performance of the hydrogen sensor in the high-voltage bushing insulating oil on the converter transformer side meets the working requirements.

[0086] In actual engineering, the on-site rapid verification and judgment method and device of the hydrogen sensor in the insulating oil of the high-voltage bushing on the converter transformer grid side of the present invention are used to conduct on-site verification of the hydrogen sensors on the high-voltage bushing on the converter transformer grid side of the extreme low YYA, YYB and YYC phases of a converter station in Northwest China.

[0087] Here are the steps:

[0088] S1, when the low-concentration standard oil is calibrated on site, when the staff opens the valve of the solenoid valve five 11 and the valve of the solenoid valve seven 15, the three-way valve one 13 is automatically switched to keep the oil outlet pipeline of the low-concentration oil cylinder 1 to the calibration oil cylinder 16 unobstructed, the valve of the solenoid valve six 12 is automatically closed, the valve of the solenoid valve eight 20 is opened, the valve of the solenoid valve nine 22, the valve of the solenoid valve ten 25 and the valve of the solenoid valve eleven 26 are closed, the oil injection pump one 14 is started to inject the standard oil sample in the low-concentration oil cylinder into the calibration oil cylinder 16, the oil injection is stopped when the volume of the standard oil is 4500ml, the valve of the solenoid valve seven 15 is closed, and the extremely low YYA, YYB and YYC phase conversion rheological network side high-pressure casing hydrogen sensor is inserted into the station, stirred for 10 minutes, and left to stand for 30 minutes;

[0089] S2, open the valve of the solenoid valve + 25, manually sample 40mL, flush the pipeline with 20mL of oil before sampling, and close the solenoid valve + 25 after flushing; repeat the offline detection and measurement of the 40mL sample twice, and take the average value of the detection results obtained from the two measurements to obtain the standard value of the standard oil sample; start the online detection and measurement of the hydrogen sensor 17 and repeat the measurement twice, and take the average value of the detection results obtained from the two measurements to obtain the calibration value of the hydrogen sensor.

[0090] S3, open the valve of the electromagnetic valve 12 29 and the valve of the electromagnetic valve 14 33, the three-way valve 2 31 automatically switches to keep the oil outlet pipeline of the calibration oil cylinder 16 to the low-concentration oil cylinder unobstructed, the valve of the electromagnetic valve 13 32 automatically closes, open the valve of the electromagnetic valve 1 2, start the oil injection pump 2 30, and inject the standard oil sample in the calibration oil cylinder 16 into the low-concentration oil cylinder 1;

[0091] S4, after the calibration oil cylinder 16 is emptied, the valves of the solenoid valve 12 29, the valves of the solenoid valve 14 33 and the valve of the solenoid valve 1 2 are closed, the valve of the solenoid valve 9 22 is opened, and the air pump 24 is started to purge air for more than 5 minutes;

[0092] S5, when calibrating the high-concentration standard oil of the hydrogen sensor on site, execute steps S1, S2, S3, and S4;

[0093] Test results such as Figure 3 As shown by Figure 3 It can be seen that the low-concentration standard oil calibration error of the hydrogen sensor in the high-voltage bushing insulating oil on the grid side of the extremely low YYA phase commutation transformer meets both Ea≤±5μL / L and Er≤±20%, and the high-concentration standard oil calibration error meets E r ≤±20%, the sensor performance meets the working requirements; the low concentration standard oil calibration error of the hydrogen sensor in the high voltage bushing insulating oil on the extremely low YYB phase commutation transformer grid side meets E a ≤±5μL / L, E r ≤±20% The larger of the two, the high concentration standard oil calibration error meets E r ≤±20%, the sensor performance meets the working requirements; the low concentration standard oil calibration error of the hydrogen sensor in the high voltage bushing insulating oil on the extremely low YYC phase commutation transformer grid side does not meet the E a ≤±5μL / L, E r ≤±20%, and the calibration error of high concentration standard oil does not meet E r ≤±20% requirement, the sensor performance cannot meet the working requirements, and it should be repaired or replaced with a new device.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for rapid on-site verification and judgment of hydrogen sensors on the grid side of a power converter. Features: The method comprises the following verification steps: Step (1): injecting a low-concentration standard oil sample and a high-concentration standard oil sample into a low-concentration oil cylinder (1) and a high-concentration oil cylinder (6) in a laboratory, and blowing the verification oil cylinder (16) clean with air; Step (2): injecting the low-concentration standard oil sample in the low-concentration oil cylinder (1) into the calibration oil cylinder (16) on site, performing manual sampling and offline testing, thereby obtaining a standard value of the low-concentration oil sample; at the same time, performing testing using a hydrogen sensor (17), first inserting the hydrogen sensor (17) into a calibration station for stirring, stirring for 10 minutes, and then resting for 30 minutes before testing, and obtaining a calibration value of the low-concentration oil sample after the testing is completed; Step (3): after the calibration of the low-concentration standard oil sample is completed, the low-concentration standard oil sample in the calibration oil cylinder (16) is extracted and injected back into the low-concentration oil cylinder (1), and at the same time, the calibration oil cylinder (16) is purged clean with air; Step (4): injecting the high-concentration standard oil sample in the high-concentration oil cylinder (6) into the calibration oil cylinder (16), performing manual sampling and offline testing to obtain a standard value of the high-concentration oil sample, inserting the hydrogen sensor into the calibration station, stirring for 10 minutes, and then letting it stand for 30 minutes before starting the test, and obtaining a calibration value of the high-concentration oil sample after the test is completed; Step (5): by comparing the calibration value of the hydrogen sensor with the standard value of the standard oil sample, determining whether the performance of the hydrogen sensor (17) meets the operating requirements.

2. According to claim 1, a method for rapid on-site verification and judgment of a hydrogen sensor on the grid side of a converter transformer, Features: The volumes of the low-concentration oil cylinder (1), the high-concentration oil cylinder (6) and the calibration oil cylinder (16) are all 5000 ml, and the volumes of the low-concentration and high-concentration standard oil samples are ≤5000 ml; the air purge time in step 1 is 5 minutes.

3. According to claim 1, a method for rapid on-site verification and judgment of a hydrogen sensor on the grid side of a converter transformer, Features: In the step (2), before the calibration measurement, the hydrogen sensor (17) is removed and repaired on site; The low-concentration standard oil sample in the low-concentration oil cylinder (1) is injected into the calibration oil cylinder (16) through an oil pump and stirred for 30 minutes. After stirring, the oil is left to stand for 10 minutes to eliminate bubbles in the oil.

4. According to claim 1, a method for rapid on-site verification and judgment of hydrogen sensors on the grid side of a converter transformer, Features: In the step (2), the manual sampling offline detection is repeated twice, and the average of the two measurement results is taken to obtain the standard value of the standard oil sample; The hydrogen sensor (17) performs two online detection and repeated measurements, and takes an average value of the two measurement results to obtain a calibration value of the hydrogen sensor; After the calibration of the hydrogen sensors (17) of this batch is completed, the calibration of the next batch of low-concentration sensors is continued according to the above steps until all the calibrations are completed.

5. According to claim 1, a method for rapid on-site verification and judgment of a hydrogen sensor on the grid side of a converter transformer, Features: In the step (3) and the step (4), according to the low-concentration calibration method of the step (2), the low-concentration standard oil sample is replaced with the high-concentration standard oil sample to obtain a high-concentration calibration value of the hydrogen sensor (17); After the calibration of this batch of sensors is completed, continue to calibrate the next batch of high-concentration sensors according to the above steps until all calibrations are completed.

6. According to claim 1, a method for rapid on-site verification and judgment of hydrogen sensors on the grid side of a converter transformer, Features: In step (5), the calibration value of the hydrogen sensor is compared with the standard value of the standard oil sample to determine whether the performance of the hydrogen sensor in the high-voltage bushing insulating oil on the converter transformer grid side meets the working requirements. The calibration error calculation formula and judgment model are as follows: Formula 1:E a =C0-C1; Formula 2: E r =C0-C1 / C1; In Formula 1 and Formula 2, E a is the absolute error, C0 is the calibration value of the hydrogen sensor; C l is the standard value of the standard oil sample; E r is the relative error; The judgment model includes two types: Type 1: When the detection range is 5-150 μL / L, the calibration error also meets E a ≤±5μL / L and E r ≤±20%, or meet E a ≤±5μL / L, E r When the larger of the two conditions is ≤±20%, it indicates that the performance of the hydrogen sensor in the insulating oil of the high-voltage bushing on the converter transformer grid side meets the working requirements; otherwise, the device should be repaired or replaced.

7. Type 2: When the detection range is 150 - 5000 μL / L and the calibration error satisfies Er≤±20%, it indicates that the performance of the hydrogen sensor in the high-voltage bushing insulating oil on the converter transformer grid side meets the working requirements; otherwise, the device should be repaired or replaced.

8. A device for implementing the on-site rapid verification and judgment method of a grid-side hydrogen sensor of a converter transformer as claimed in any one of claims 1 to 6, Features: It comprises the low-concentration oil cylinder (1), the high-concentration oil cylinder (6), the calibration oil cylinder (16), the waste gas and waste oil cylinder (28), a solenoid valve, an exhaust pipe, an oil injection pump, a three-way valve, an air intake valve (23), an air pump (24) and a manual sampling valve (25); The number of the solenoid valves is 13, the number of the exhaust pipes is 3, the number of the oil injection pumps is 5, and the number of the three-way valves is 2; The inlet of the low-concentration oil cylinder (1) is connected to exhaust pipe 1 (3) and solenoid valve 1 (2) in sequence, and at the same time, solenoid valve 2 (4) and oil filling pipe 1 (5) are connected in parallel to the inlet of the low-concentration oil cylinder (1); The inlet of the low-concentration oil cylinder (1) and the inlet of the calibration oil cylinder (16) are fixedly connected via a solenoid valve five (11), a three-way valve one (13), an oil injection pump one (14) and a solenoid valve seven (15); The outlet of the low-concentration oil cylinder (1) and the inlet of the calibration oil cylinder (16) are fixedly connected via a solenoid valve thirteen (33), a three-way valve two (31), a fuel injection pump two (30) and a solenoid valve eleven (29); The inlet of the high-concentration oil cylinder (6) is connected to the solenoid valve three (7) and the exhaust pipe two (8) in sequence, and at the same time, the solenoid valve four (9) and the oil injection pipe two (10) are connected in parallel to the inlet of the high-concentration oil cylinder (6); The inlet of the high-concentration oil cylinder (6) is fixedly connected to the solenoid valve six (12), and the three-way valve one (13) is fixedly connected to the inlet of the low-concentration oil cylinder (1); The outlet of the high-concentration oil cylinder (6) is fixedly connected to the inlet of the calibration oil cylinder (16) via a solenoid valve 12 (32).

9. The device for the on-site rapid verification and judgment method of the grid-side hydrogen sensor of the converter transformer according to claim 7, Features: The calibration oil cylinder (16) is equipped with a pressure gauge (19), a hydrogen sensor (17), a solenoid valve eight (20) and an exhaust pipe three (21). The bottom of the calibration oil cylinder (16) is equipped with a manual sampling valve (25). The hydrogen sensor (17) is fixedly connected to the data acquisition module (18); The outlet of the calibration oil cylinder (16) is fixedly connected to the electromagnetic valve nine (22), the air intake pipe (23) and the air pump (24) in sequence; The outlet of the calibration oil cylinder (16) is fixedly connected to the waste gas and waste oil cylinder (28) via a solenoid valve ten (26) and an oil injection pump three (27).

10. The device for the on-site rapid verification and judgment method of the grid-side hydrogen sensor of the converter transformer according to claim 7, Features: The hydrogen sensor (17) is provided with a calibration station, and the number of the calibration stations is generally three.

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