Intelligent detection method and system based on hydrogen content of cooling water of generator

Abstract

The invention relates to an intelligent detection method and system based on the hydrogen content of cooling water of a generator, and belongs to the technical field of hydrogen leakage monitoring. The method comprises the following steps: acquiring the hydrogen concentration of a water sample at a water inlet and the hydrogen concentration of a water sample at a water outlet; establishing a deviation control model according to the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet to obtain a control output variable; sending a control signal to a regulator according to the control output variable, and performing deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet; adding time step representation for the hydrogen concentration data of the water sample, and calculating the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through a diagnostor to obtain the hydrogen leakage amount; and monitoring the water cooling box in real time, counting the hourly hydrogen leakage amount and the daily hydrogen leakage amount, and judging whether the hydrogen leakage amount exceeds a safety threshold value or not. The trace measurement of the hydrogen concentration of the water sample is realized, and the interference of water discharging and supplementing, exhaust, dissolved oxygen in water, temperature and pressure of the water cooling box is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen leakage monitoring and discloses an intelligent detection method and system based on the hydrogen content of generator cooling water. Background Art

[0002] The hydrogen content in the generator cooling water is a key monitoring indicator because it is directly related to the operating status and safety of the generator. When the generator is running, the insulating material will be affected by heat and electricity, thus generating hydrogen. If the hydrogen content in the generator cooling water exceeds a certain range, it may pose a threat to the safety of the equipment and even cause an accident. Due to the leakage defects of the wire rods and water-electric joints in the generator set due to aging, corrosion, vibration, and temperature changes, contact resistance will be generated, and heat will be generated under high current. Under the action of heat, the leakage point will be further expanded, resulting in greater contact resistance, and finally instantaneous heat will be generated, causing the equipment to burn; due to hydrogen leakage into the cooling water, copper oxide is reduced to elemental copper and cuprous oxide. The reduced copper will form uneven copper plating in the narrow places of the hollow wire, causing the hollow wire to flow, the area becomes smaller, the flow rate decreases, and the temperature increases, forcing the unit to only operate at reduced load. In severe cases, the hollow wire is blocked, causing the wire rod to burn and shut down. Supervising the leakage of the water cooling box is an effective means to ensure the safe operation of the generator set.

[0003] There are still areas for improvement:

[0004] (1) Monitor the concentration of hydrogen accumulated in the upper part of the water tank. The alarm instrument has a measurement range of percentage concentration, which mainly plays an explosion-proof role and cannot detect small leaks. The hydrogen concentration at the top of the water tank can only be accurately measured when it reaches a percentage concentration. When the exhaust valve is closed, the hydrogen concentration can slowly enrich and become higher and higher, but at this time the upper part of the water tank is under positive pressure, and the hydrogen volume cannot be accurately measured. The instrument has low accuracy and cannot truly reflect the amount of hydrogen leakage in the cooling water. Using the amount of hydrogen replenishment to measure the size of the leak cannot explain the leakage at the water-electricity interface.

[0005] (2) The wind pressure and water pressure tests use a pressure drop method. Due to the accuracy of the pressure gauge, only larger leaks can be detected, and the test cycle is long. However, if the leakage is very small, although the wind pressure and water pressure tests are qualified, it will still cause the equipment to operate with defects, posing a major safety hazard. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention provides an intelligent detection method and system based on the hydrogen content of generator cooling water.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] S1: Obtain an inlet water sample and an outlet water sample of a water cooling box through an ion exchanger, transport the inlet water sample and the outlet water sample to a gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through a gas path system to obtain a hydrogen concentration of the inlet water sample and a hydrogen concentration of the outlet water sample;

[0009] S2: establishing a deviation control model according to the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and obtaining a control output variable according to the deviation control model;

[0010] S3: sending a control signal to the regulator according to the control output variable, parsing the control signal in the regulator and sending execution information to the controller, adjusting the feed amount of the cooling water inlet according to the execution information, and performing deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the hydrogen concentration of the water sample at the feed amount;

[0011] S4: Record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box through a recorder, upload the hydrogen concentration data of the water sample to the storage module of the monitoring system through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through a diagnostic device to obtain the hydrogen leakage amount;

[0012] S5: By real-time monitoring of the water cooling box, the storage data of the monitoring system is updated in real time, and the hourly and daily hydrogen leakage amounts are counted. If the hydrogen leakage amount exceeds the safety threshold, a safety alarm message is issued and an emergency shutdown response is performed. If the hydrogen leakage amount does not exceed the safety threshold, the system is kept in normal operation.

[0013] Specifically, the step S1 includes:

[0014] The inlet and outlet water samples are sampled by monitoring devices at the inlet and outlet of the water cooling box; the inlet and outlet water samples are discharged into a distillation tower to obtain high-boiling point components and low-boiling point components, the low-boiling point components are discharged through a condenser to obtain a hydrogen sample, the high-boiling point components are concentrated, and the samples are heated and sent back to the distillation tower through a reboiler. The hydrogen sample is brought into a chromatographic column through a carrier gas for operation, the plate height is determined by analyzing the column efficiency of the chromatographic column, and the hydrogen concentration of the water sample is calculated according to the plate height.

[0015] Furthermore, the step S2 comprises the following steps:

[0016] The concentration deviation is obtained by the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and the initial transfer function is obtained according to the deviation. The calculation formula is:

[0017]

[0018] Among them, G1 is the initial transfer function, r is the water resistance in the top cooling water tank, k is the quantization factor, u is the concentration control amount, s is the deviation, T1 is the water inlet cross-sectional area, and T2 is the water outlet cross-sectional area;

[0019] The correction transfer function is obtained according to the hysteresis of the hydrogen concentration detection time of the water sample, and the deviation control model is obtained through the initial transfer function and the correction transfer function:

[0020] The concentration deviation and the rate of change of the concentration deviation are used as input variables, and the control output variable is obtained through the deviation control model.

[0021] Specifically, the correction transfer function is to model the concentration deviation in the time dimension, preset the lag prediction time, parameterize the nonlinear dependency between the prediction variable and the lag variable through the regression model to obtain the exposure vector, and construct the correction transfer function according to the exposure vector. The calculation formula is:

[0022]

[0023] Among them, G2 is the correction transfer function, s is the deviation basis variable, U is the lag dimension, K is the lag variable, e is a natural number, and w is the exposure vector parameter.

[0024] Specifically, the control output variable calculation method is:

[0025] The concentration deviation and the deviation change rate are used as input variables of the deviation control model, the input variables are segmented to obtain input components, and the membership of the input components is calculated by the membership function, and the calculation formula is:

[0026]

[0027] Among them, i is the membership degree, i is the input component count, e is a natural number, x i is the input component, c i is the center of the membership function, σ is the width of the membership function;

[0028] Preset constraint rules, calculate the fitness of the constraint rules according to the membership, obtain the gain of the control parameter through the fitness to obtain the control output variable, and the calculation formula is:

[0029]

[0030] Among them, u is the control output variable, t is the time variable, and w p is the proportional gain parameter, w i is the integral gain parameter, wd is the differential gain parameter.

[0031] Specifically, the diagnostic device keeps the temperatures on both sides of the cooling water tank constant at the same temperature during measurement, measures the hydrogen concentration of water samples at the inlet and outlet of the cooling water tank in real time under standard pressure, and calculates the hourly hydrogen leakage and daily hydrogen leakage.

[0032] An intelligent detection system based on the hydrogen content of generator cooling water, including a data acquisition module, a deviation prediction module, a calibration module, a storage and analysis module, and an early warning module;

[0033] The data acquisition module is used to obtain the water sample at the inlet and outlet of the water cooling box, transport the inlet and outlet water samples to the gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through the gas path system to obtain the hydrogen concentration of the water sample at the inlet and the hydrogen concentration of the water sample at the outlet;

[0034] The deviation prediction module is used to establish a deviation control model, and obtain a control output variable according to the deviation control model;

[0035] The calibration module is used to send a control signal to the regulator according to the control output variable, analyze the control signal in the regulator and send execution information to the controller, adjust the feed amount of the cooling water inlet according to the execution information, and perform deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the hydrogen concentration of the water sample at the feed amount;

[0036] The storage and analysis module is used to record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box, and upload the hydrogen concentration data of the water sample to the monitoring system storage module through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through the diagnostic device to obtain the hydrogen leakage amount;

[0037] The early warning module is used to update the storage data of the monitoring system in real time, and to count the hourly and daily hydrogen leakage amounts, and to determine whether the hydrogen leakage amounts exceed the safety threshold. If so, a safety alarm message is issued and an emergency shutdown response is performed; if not, the system is kept running normally.

[0038] Specifically, the early warning module includes a diagnostic device, a controller, and a regulator; wherein the diagnostic device divides the hydrogen leakage into three conditions: normal, alarm, and severe; the controller remotely controls the switching of the equipment; and the regulator adjusts the temperature and pressure in the water cooling box.

[0039] As a preferred technical solution of the present invention, the beneficial effects of the present invention are:

[0040] (1) By directly measuring the hydrogen concentration in the cooling water, hydrogen leakage can be quickly detected. The amount of hydrogen leakage is calculated by the difference between the hydrogen concentrations in the water samples at the inlet and outlet of the water cooling box, avoiding interference from water level changes in the water tank, water temperature, exhaust, protective gas, hydrogen in the water, and dissolved oxygen in the water, making the measurement results more accurate.

[0041] (2) By accurately calculating the hourly and daily hydrogen leakage of the equipment group and generating a real-time online trend chart of the hydrogen leakage concentration, the hidden dangers of tiny leakage at the water-gas interface of the equipment group can be monitored in real time, providing a basis for the safe and economical operation and condition maintenance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0043] Figure 1 The figure is a flow chart of an intelligent detection method based on hydrogen content in generator cooling water according to the present invention. DETAILED DESCRIPTION

[0044] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0045] See also Figure 1 , an intelligent detection method and system based on the hydrogen content of generator cooling water, is realized through the following technical solutions:

[0046] S1: Obtain an inlet water sample and an outlet water sample of a water cooling box through an ion exchanger, transport the inlet water sample and the outlet water sample to a gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through a gas path system to obtain a hydrogen concentration of the inlet water sample and a hydrogen concentration of the outlet water sample;

[0047] S2: establishing a deviation control model according to the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and obtaining a control output variable according to the deviation control model;

[0048] S3: sending a control signal to the regulator according to the control output variable, parsing the control signal in the regulator and sending execution information to the controller, adjusting the feed amount of the cooling water inlet according to the execution information, and performing deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the hydrogen concentration of the water sample at the feed amount;

[0049] S4: Record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box through a recorder, upload the hydrogen concentration data of the water sample to the storage module of the monitoring system through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through a diagnostic device to obtain the hydrogen leakage amount;

[0050] S5: By real-time monitoring of the water cooling box, the storage data of the monitoring system is updated in real time, and the hourly and daily hydrogen leakage amounts are counted. If the hydrogen leakage amount exceeds the safety threshold, a safety alarm message is issued and an emergency shutdown response is performed. If the hydrogen leakage amount does not exceed the safety threshold, the system is kept in normal operation.

[0051] Specifically, the step S1 includes:

[0052] The inlet and outlet water samples are sampled by monitoring devices at the inlet and outlet of the water cooling box; the inlet and outlet water samples are discharged into a distillation tower to obtain high-boiling point components and low-boiling point components, the low-boiling point components are discharged through a condenser to obtain a hydrogen sample, the high-boiling point components are concentrated, and the samples are heated and sent back to the distillation tower through a reboiler. The hydrogen sample is brought into a chromatographic column through a carrier gas for operation, the plate height is determined by analyzing the column efficiency of the chromatographic column, and the hydrogen concentration of the water sample is calculated according to the plate height.

[0053] In this embodiment, the different boiling points of the components are utilized to separate the components by partial vaporization and partial condensation for many times, and finally obtain the high-purity components. The main equipment includes a distillation tower, a reboiler, and a condenser. The upper part is the distillation section and the lower part is the stripping section, with the entrance of the distillation tower as the boundary. After the mixture of a certain temperature and pressure enters the distillation tower, the low-boiling point components are gradually concentrated in the distillation section and flow to the top of the tower. After leaving the top of the tower, they are all condensed into liquids, of which part of the liquid is discharged as condensate, and the other part is refluxed into the tower to supplement the low-boiling point components, ensuring that the distillation is carried out continuously and stably; the high-boiling point components are concentrated in the stripping section and then discharged, and the other part is heated in the reboiler and sent back to the tower, providing a certain amount of continuously rising gas phase for distillation; the separation degree is calculated by using the different distribution coefficients between the two phases of each component in the sample in the chromatographic column; the stationary phase is composed of various chromatographic supports, stationary liquids or various adsorbents and other granular substances. When the gaseous sample is carried into the chromatographic column by the carrier gas, the components are repeatedly distributed between the two phases. Since the stationary phase has different adsorption or solubility capabilities for each component and different retention effects, the running speed of each component in the chromatographic column is different. After a certain column length, they are separated from each other and flow out of the stationary phase in order. The relationship curve between the signal and time obtained when the substance in the carrier gas passes through the detector is used to obtain the chromatographic peak. The ratio of the distance difference between adjacent chromatographic peaks to the wide average value is 1.5 as a sign of complete separation.

[0054] Furthermore, the step S2 comprises the following steps:

[0055] The concentration deviation is obtained by the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and the initial transfer function is obtained according to the deviation. The calculation formula is:

[0056]

[0057] Among them, G1 is the initial transfer function, r is the water resistance in the top cooling water tank, k is the quantization factor, u is the concentration control amount, s is the deviation, T1 is the water inlet cross-sectional area, and T2 is the water outlet cross-sectional area;

[0058] The correction transfer function is obtained according to the hysteresis of the hydrogen concentration detection time of the water sample, and the deviation control model is obtained through the initial transfer function and the correction transfer function:

[0059] The concentration deviation and the rate of change of the concentration deviation are used as input variables, and the control output variable is obtained through the deviation control model.

[0060] Specifically, the correction transfer function is to model the concentration deviation in the time dimension, preset the lag prediction time, parameterize the nonlinear dependency between the prediction variable and the lag variable through the regression model to obtain the exposure vector, and construct the correction transfer function according to the exposure vector. The calculation formula is:

[0061]

[0062] Among them, G2 is the correction transfer function, s is the deviation basis variable, U is the lag dimension, K is the lag variable, e is a natural number, and w is the exposure vector parameter.

[0063] Specifically, the control output variable calculation method is:

[0064] The concentration deviation and the deviation change rate are used as input variables of the deviation control model, the input variables are segmented to obtain input components, and the membership of the input components is calculated by the membership function, and the calculation formula is:

[0065]

[0066] Among them, i is the membership degree, i is the input component count, e is a natural number, x i is the input component, c i is the center of the membership function, σ is the width of the membership function;

[0067] Preset constraint rules, calculate the fitness of the constraint rules according to the membership, obtain the gain of the control parameter through the fitness to obtain the control output variable, and the calculation formula is:

[0068]

[0069] Among them, u is the control output variable, t is the time variable, and w p is the proportional gain parameter, w i is the integral gain parameter, w d is the differential gain parameter.

[0070] In this embodiment, the system function System Function in the Simulink toolbox is used to build a model of the water sample hydrogen concentration control system. According to the above formula, the S-Function source code is created, the M file is selected to write the S-Function, and the module adoption rate is set to 1. The created S-Function module is imported into the simulation model of the water sample hydrogen concentration, and the simulation model of the water sample hydrogen concentration based on fuzzy PID control and PID control is created for comparison.

[0071] Specifically, the diagnostic device keeps the temperatures on both sides of the cooling water tank constant at the same temperature during measurement, measures the hydrogen concentration of water samples at the inlet and outlet of the cooling water tank in real time under standard pressure, and calculates the hourly hydrogen leakage and daily hydrogen leakage.

[0072] An intelligent detection system based on the hydrogen content of generator cooling water, including a data acquisition module, a deviation prediction module, a calibration module, a storage and analysis module, and an early warning module;

[0073] The data acquisition module is used to obtain the water sample at the inlet and outlet of the water cooling box, transport the inlet and outlet water samples to the gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through the gas path system to obtain the hydrogen concentration of the water sample at the inlet and the hydrogen concentration of the water sample at the outlet;

[0074] The deviation prediction module is used to establish a deviation control model, and obtain a control output variable according to the deviation control model;

[0075] The calibration module is used to send a control signal to the regulator according to the control output variable, analyze the control signal in the regulator and send execution information to the controller, adjust the feed amount of the cooling water inlet according to the execution information, and perform deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the hydrogen concentration of the water sample at the feed amount;

[0076] The storage and analysis module is used to record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box, and upload the hydrogen concentration data of the water sample to the monitoring system storage module through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through the diagnostic device to obtain the hydrogen leakage amount;

[0077] The early warning module is used to update the storage data of the monitoring system in real time, and to count the hourly and daily hydrogen leakage amounts, and to determine whether the hydrogen leakage amounts exceed the safety threshold. If so, a safety alarm message is issued and an emergency shutdown response is performed; if not, the system is kept running normally.

[0078] Specifically, the early warning module includes a diagnostic device, a controller, and a regulator; wherein the diagnostic device divides the hydrogen leakage into three conditions: normal, alarm, and severe; the controller remotely controls the switching of the equipment unit; and the regulator adjusts the temperature and pressure in the water cooling box.

[0079] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An intelligent detection method based on the hydrogen content of generator cooling water, characterized in that: The steps include: S1: Obtain an inlet water sample and an outlet water sample of a water cooling box through an ion exchanger, transport the inlet water sample and the outlet water sample to a gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through a gas path system to obtain a hydrogen concentration of the inlet water sample and a hydrogen concentration of the outlet water sample; S2: establishing a deviation control model according to the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and obtaining a control output variable according to the deviation control model; S3: sending a control signal to the regulator according to the control output variable, parsing the control signal in the regulator and sending execution information to the controller, adjusting the feed amount of the cooling water inlet according to the execution information, and performing deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the measured hydrogen concentration of the feed amount; S4: Record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box through a recorder, upload the hydrogen concentration data of the water sample to the storage module of the monitoring system through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through a diagnostic device to obtain the hydrogen leakage amount; S5: By real-time monitoring of the water cooling box, the storage data of the monitoring system is updated in real time, and the hourly and daily hydrogen leakage amounts are counted. If the hydrogen leakage amount exceeds the safety threshold, a safety alarm message is issued and an emergency shutdown response is performed. If the hydrogen leakage amount does not exceed the safety threshold, the system is kept in normal operation.

2. The detection method according to claim 1, characterized in that: The step S1 comprises the following steps: Sampling is performed at the inlet and outlet of a water cooling box by means of a monitoring device to obtain the inlet water sample and the outlet water sample; the inlet water sample and the outlet water sample are discharged into a distillation tower to obtain a high-boiling-point component and a low-boiling-point component, the low-boiling-point component is discharged through a condenser to obtain a hydrogen sample, the high-boiling-point component is concentrated, and the sample is heated through a reboiler and sent back to the distillation tower; the hydrogen sample is brought into a chromatographic column through a carrier gas for operation, the tower plate height is determined by analyzing the column efficiency of the chromatographic column, and the hydrogen concentration of the water sample is calculated according to the tower plate height.

3. The detection method according to claim 1, characterized in that: The step S2 comprises the following steps: The concentration deviation is obtained by the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet, and the initial transfer function is obtained according to the deviation. The calculation formula is: Among them, G1 is the initial transfer function, r is the water resistance in the top cooling water tank, k is the quantization factor, u is the concentration control amount, s is the deviation, T1 is the water inlet cross-sectional area, and T2 is the water outlet cross-sectional area; The concentration deviation and the rate of change of the concentration deviation are used as input variables of the deviation control model, and the control output variable is obtained by calculating the deviation control model.

4. The detection method according to claim 3, characterized in that: The deviation control model is composed of the initial transfer function and the correction transfer function.

5. The detection method according to claim 4, characterized in that: The correction transfer function models the concentration deviation in the time dimension, presets the lag prediction time, obtains the exposure vector through regression model parameterization according to the nonlinear dependency between the prediction variable and the lag variable, and constructs the correction transfer function according to the exposure vector.

6. The detection method according to claim 5, characterized in that: The exposure vector calculation method is: Among them, G2 is the correction transfer function, s is the deviation basis variable, U is the lag dimension, K is the lag variable, e is a natural number, and w is the exposure vector parameter.

7. The detection method according to claim 1, characterized in that: The control output variable calculation method is: The concentration deviation and the deviation change rate are used as input variables of the deviation control model, the input variables are segmented to obtain input components, and the membership of the input components is calculated by the membership function, and the calculation formula is: Among them, O i is the membership degree, i is the input component count, e is a natural number, x i is the input component, c i is the center of the membership function, σ is the width of the membership function; Preset constraint rules, calculate the fitness of the constraint rules according to the membership, obtain the gain of the control parameter through the fitness to obtain the control output variable, and the calculation formula is: Among them, u is the control output variable, t is the time variable, and w p is the proportional gain parameter, w i is the integral gain parameter, w d is the differential gain parameter.

8. The detection method according to claim 1, characterized in that: The diagnostic device keeps the temperatures on both sides of the cooling water tank constant at the same temperature during measurement, measures the hydrogen concentration of water samples at the inlet and outlet of the cooling water tank in real time under standard pressure, and calculates the hourly and daily hydrogen leakage amounts.

9. An intelligent detection system for hydrogen content in generator cooling water, characterized in that: It includes data acquisition module, deviation prediction module, calibration module, storage and analysis module, and early warning module; The data acquisition module is used to obtain the water sample at the inlet and outlet of the water cooling box, transport the inlet and outlet water samples to the gas-liquid separator for gas-liquid separation to obtain a hydrogen sample, and transmit the hydrogen sample to the gas chromatograph through the gas path system to obtain the hydrogen concentration of the water sample at the inlet and the hydrogen concentration of the water sample at the outlet; The deviation prediction module is used to establish a deviation control model, and obtain a control output variable according to the deviation control model; The calibration module is used to send a control signal to the regulator according to the control output variable, analyze the control signal in the regulator and send execution information to the controller, adjust the feed amount of the cooling water inlet according to the execution information, and perform deviation correction on the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet according to the hydrogen concentration of the water sample at the feed amount; The storage and analysis module is used to record the hydrogen concentration of the water sample at the water inlet and the water outlet of the water cooling box, and upload the hydrogen concentration data of the water sample to the monitoring system storage module through the data serial port, add a time step representation to the hydrogen concentration data of the water sample, and calculate the difference between the hydrogen concentration of the water sample at the water inlet and the hydrogen concentration of the water sample at the water outlet at the same time step through the diagnostic device to obtain the hydrogen leakage amount; The early warning module is used to update the storage data of the monitoring system in real time, and to count the hourly and daily hydrogen leakage amounts, and to determine whether the hydrogen leakage amounts exceed the safety threshold. If so, a safety alarm message is issued and an emergency shutdown response is performed; if not, the system is kept running normally.

10. The system according to claim 9, characterized in that The early warning module includes a diagnostic device, a controller, and a regulator; wherein the diagnostic device divides the hydrogen leakage into three conditions: normal, alarm, and severe; the controller remotely controls the switching of the fireplace; and the regulator adjusts the temperature and pressure in the water cooling box.

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