CN-121993732-A - Valve driving control method, device and medium for hydrogen storage system of train

CN121993732ACN 121993732 ACN121993732 ACN 121993732ACN-121993732-A

Abstract

The invention discloses a valve driving control method, device and medium of a hydrogen storage system of a train, which comprises the steps of controlling a valve driving circuit to output PWM driving current to bottleneck valves of hydrogen cylinders in the hydrogen storage system to control the opening of the bottleneck valves in a starting stage, adjusting the duty ratio of the PWM driving current output by the valve driving circuit in an output maintaining stage, detecting a driving current feedback value in real time in the control process of the starting stage and the output maintaining stage, judging the fault state of a valve coil and calculating the temperature rise value of the coil according to the driving current feedback value detected in real time, and calculating the predicted value of the health state of the hydrogen storage system according to the driving current feedback value in the starting stage, the output maintaining stage and the temperature rise value so as to predict and evaluate the health state of the hydrogen storage system. The invention has the advantages of simple implementation method, low cost, high control efficiency, fault monitoring function, safety, reliability and the like.

Inventors

FANG PENG
FENG JIAN
XIAO XIAO
WANG SHANGYIN
ZHANG MINGSHUAI

Assignees

株洲中车时代电气股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (13)

1. The method for controlling the valve drive of the hydrogen storage system of the train comprises a plurality of hydrogen cylinders, and each hydrogen cylinder is correspondingly provided with a bottleneck valve, and is characterized by comprising the following steps: In the starting stage, the control valve driving circuit outputs PWM driving current to the bottleneck valves of each hydrogen cylinder in the hydrogen storage system to control the opening of each bottleneck valve; in the control process of the starting stage and the output maintaining stage, detecting a driving current feedback value in real time, judging a fault state of a corresponding valve coil according to the driving current feedback value detected in real time, and calculating a temperature rise value of the corresponding valve coil; And predicting the health state of the hydrogen storage system according to the driving current feedback value of the starting stage and the output maintaining stage and the temperature rise value of the coil.
2. The method according to claim 1, wherein the judging of the failure state of the valve coil based on the drive current feedback value detected in real time comprises: In the starting stage, if the detected driving current feedback value is smaller than a preset starting minimum current, judging that the valve coil has a break fault, and if the detected driving current feedback value is larger than a specified multiple of a rated starting current, judging that the valve coil has a short circuit fault; In the output maintenance stage, if the detected driving current feedback value is smaller than the preset maintenance minimum current, the valve coil is judged to have a break fault, and if the detected driving current feedback value is larger than a specified multiple of the rated maintenance current, the valve coil is judged to have a short circuit fault.
3. The method for controlling valve actuation of a hydrogen storage system of a train according to claim 1, further comprising determining whether an abnormality pre-warning is required according to the real-time detected feedback value of the driving current after determining the fault state of the valve coil, wherein if I feed-on >I on +ΔI on or I feed-on <I on -ΔI on is satisfied during the start-up phase and if I feed-hold >I hold +ΔI hold or I feed-hold <I hold -ΔI hild is satisfied during the output maintenance phase, an abnormality pre-warning is determined to be required, wherein I feed-on is the feedback value of the driving current detected during the start-up phase, I on is the rated start-up current, Δi on is the normal current variation range during the start-up phase, I hold is the rated maintenance current, and Δi hold is the normal current variation range during the maintenance phase.
4. The valve drive control method of a hydrogen storage system of a train according to claim 1, wherein the calculation expression for calculating the temperature rise value of the corresponding valve coil is: Wherein T coil is the temperature rise value of the valve coil, U is the driving voltage acquisition value, T e is the ambient temperature of 20 ℃, T k is the inverse of the temperature coefficient of resistance of the coil material at 0 ℃, and R e is the resistance of the coil at the ambient temperature of 20 ℃.
5. The valve drive control method of a hydrogen storage system of a train according to claim 1, further comprising calculating all equivalent life values that have been lost at present from the calculated temperature rise value of the valve coil, the calculation expression being: Wherein L cy represents all equivalent life values which have been lost currently, HIC is a material half difference, T coil-i represents the ith operating temperature when the valve coil is actually operated, T i is the operating time when the operating temperature is at T coil-i , and M represents all the temperature value amounts when the coil is actually operated.
6. The method for controlling valve driving of a hydrogen storage system according to any one of claims 1 to 5, wherein predicting the health status of the hydrogen storage system according to the driving current feedback values of the start-up phase and the output maintenance phase and the temperature rise value of the coil includes calculating an abnormal level value of the start-up phase and an abnormal level value of the output maintenance phase according to the driving current feedback values of the bottleneck valves in the start-up phase and the output maintenance phase, respectively, and weighting the abnormal level values of the abnormal level value and the output maintenance phase and the equivalent life index to obtain the health status predicted value corresponding to each bottleneck valve for evaluating the health status, wherein the equivalent life index is a ratio between all equivalent life values which are lost currently and the total equivalent life of the temperature aging loss is equal to the insulating material temperature index time.
7. The method for controlling valve actuation of a hydrogen storage system of a train according to claim 6, wherein the predicted value of the state of health corresponding to each bottleneck valve is calculated according to the following equation: w on ＝|I feed-on -I on | w hold ＝|I feed-hold -I hold | Wherein W j represents a predicted value of the health state of the jth bottleneck valve, β j is an abnormal early warning constraint factor of the output maintenance stage of the jth bottleneck valve, θ j is a constraint factor of the equivalent life of the jth bottleneck valve, α j is a start-up stage abnormal early warning constraint factor of the jth bottleneck valve, W on is a start-up stage abnormal early warning value, W hold is an output maintenance stage abnormal early warning value, I feed-on is a drive current feedback value detected in the start-up stage, I on is a rated start current, I feed-hold is a drive current feedback value detected in the start-up stage, and I hold is a rated maintenance current; The predicted value of the health state of the whole hydrogen storage system is as follows: wherein N represents the number of bottleneck valves.
8. The method for controlling valve actuation of a hydrogen storage system for a train according to any one of claims 1 to 5, wherein a batch-time-sharing start control method is adopted to start a batch of bottleneck valves first and then start a next batch of bottleneck valves after entering an output maintenance stage.
9. A valve drive control module of a hydrogen storage system of a train, comprising a processor and a memory for storing a computer program, wherein the processor is configured to execute the computer program to perform the method of any one of claims 1-8.
10. A valve driving device of a hydrogen storage system of a train, which is characterized by comprising a valve driving control module and a plurality of valve driving modules, wherein each valve driving module is respectively connected with the valve driving control module, each valve driving module is correspondingly connected with a bottleneck valve of a hydrogen cylinder, and the valve driving control module performs valve driving control by adopting the method according to any one of claims 1-8.
11. The valve driving device of a hydrogen storage system of a train according to claim 10, wherein the valve driving module comprises a current collecting circuit, a PWM driving circuit and a freewheel circuit which are sequentially connected, and the freewheel circuit is disposed at both ends of the bottleneck valve.
12. The valve driving device for a hydrogen storage system of a train according to claim 11, wherein the input end of the current collecting circuit is further provided with a driving main switch, and the opening of the corresponding bottleneck valve is controlled by controlling the opening of the driving main switch and the normal output of the PWM driving circuit.
13. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the method of any one of claims 1-8.

Description

Valve driving control method, device and medium for hydrogen storage system of train Technical Field The invention relates to the technical field of control of hydrogen storage systems of hydrogen energy trains, in particular to a method, a device and a medium for controlling valve driving of a hydrogen storage system of a train. Background The hydrogen storage system is responsible for realizing the storage and supply of hydrogen, and is a direct energy source of a hydrogen energy train. Along with the increasing requirements on the endurance mileage and the running speed of the train, the hydrogen capacity of the hydrogen storage system is increased by adopting the hydrogen storage bottle with high pressure of 70Mpa and increasing the number of the hydrogen bottles, and the hydrogen is colorless, inflammable and explosive dangerous gas, and after the pressure and the capacity are increased, the safety requirements on the control of components and the state monitoring of the hydrogen storage system are also higher. In order to prevent the risk of hydrogen accumulation, the hydrogen storage system of the current hydrogen energy train is usually installed on a roof and adopts a porous design in combination with a protective cover, but the system is equivalent to exposing all parts in the system to the air environment, is easy to be eroded by wind, rain, particle dust and other foreign matters, and if the system fails in the running process, the system is difficult to overhaul in time, and the overhaul operation can not be completed until the system is restored to the warehouse after rescue. In addition, the bottleneck valve and the electromagnetic valve which are key control components of the hydrogen storage system are driven by a mechanical coil in an open loop manner, when a certain valve fails, the system cannot sense the failure in time, if the bottleneck valve cannot be normally opened or closed when the failure exists, the pressure difference between hydrogen bottles is continuously increased, potential safety hazards are generated, the calculated residual hydrogen capacity and the actual available hydrogen capacity have deviation, and the larger the number of the bottleneck valve fails, the larger the deviation is, so that the normal operation of a train is seriously influenced. The Chinese patent application CN113540532A discloses a bottleneck valve fault diagnosis method of a hydrogen system of a fuel cell, which is characterized in that the pressure rising process of a hydrogen supply pipeline of the hydrogen system is divided into a plurality of stages, each time a hydrogen cylinder with the lowest pressure of hydrogen stored in the hydrogen cylinder is opened, a pressure sensor is arranged in each hydrogen cylinder, and after the bottleneck valve of one hydrogen cylinder is opened in each stage in sequence, closing operation is executed, so that the fault hydrogen cylinder bottleneck valve is diagnosed. However, the diagnosis method is complex to implement, low in efficiency, difficult to support real-time fault monitoring, and capable of diagnosing faults of a single valve, and incapable of predicting the overall health state of the hydrogen storage system in advance. Disclosure of Invention Aiming at the technical problems existing in the prior art, the invention provides the driving control method, the device and the medium for the valve of the hydrogen storage system of the train, which have the advantages of simple implementation method, low cost, high control efficiency, fault monitoring function, safety and reliability, can realize the fault state monitoring of the bottleneck valve of the hydrogen storage system of the train in real time, and can predict the overall health state of the hydrogen storage system and ensure the overall operation safety and reliability of the system. In order to solve the technical problems, the technical scheme provided by the invention is as follows: A method for controlling the valve drive of a hydrogen storage system of a train, wherein the hydrogen storage system comprises a plurality of hydrogen cylinders, each hydrogen cylinder is correspondingly provided with a bottleneck valve, and the method comprises the following steps: in the starting stage, a control valve driving circuit outputs PWM (Pulse Width Modulation, pulse width modulation circuit) driving current to bottleneck valves of each hydrogen cylinder in the hydrogen storage system to control the opening of each bottleneck valve; in the control process of the starting stage and the output maintaining stage, detecting a driving current feedback value in real time, judging a fault state of a corresponding valve coil according to the driving current feedback value detected in real time, and calculating a temperature rise value of the corresponding valve coil; And predicting the health state of the hydrogen storage system according to the driving current feedback value of the starting stage and the o