CN116791121A - Hydrogen production power supply device with electrolytic tank detection function, system and control method - Google Patents
Hydrogen production power supply device with electrolytic tank detection function, system and control method Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 296
- 239000001257 hydrogen Substances 0.000 title claims abstract description 204
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 204
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 201
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000009413 insulation Methods 0.000 claims description 100
- 238000011156 evaluation Methods 0.000 claims description 23
- 238000005868 electrolysis reaction Methods 0.000 claims description 22
- 230000005284 excitation Effects 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 16
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- 230000005856 abnormality Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 6
- 230000008030 elimination Effects 0.000 claims description 5
- 238000003379 elimination reaction Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000012546 transfer Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 14
- 230000036541 health Effects 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The invention discloses a hydrogen production power supply device with an electrolytic cell detection function, a system and a control method, wherein the device comprises a control module, a power supply main circuit module, a power supply detection module and an electrolytic cell detection module which are respectively connected with the control module, wherein the input end of the power supply main circuit module is connected with an input power supply, the output end of the power supply main circuit module is connected with the electrolytic cell to provide required direct current for the electrolytic cell, the power supply detection module is also connected with the power supply main circuit module and is used for detecting state information of the power supply main circuit module in the operation process, the electrolytic cell detection module is also connected with the electrolytic cell and is used for detecting the state information of the electrolytic cell, and the control module respectively receives the state information detected by the power supply detection module and the state information of the electrolytic cell detected by the electrolytic cell detection module and controls the power supply main circuit module and the electrolytic cell. The invention can realize the online detection of the state of the electrolytic tank and has the advantages of simple structure, low cost, small volume and weight, high energy utilization rate, high safety and reliability and the like.
Description
Technical Field
The invention relates to the technical field of hydrogen production power supplies, in particular to a hydrogen production power supply device with an electrolytic cell detection function, a hydrogen production power supply system and a control method.
Background
The hydrogen energy is a secondary energy source and an important industrial raw material which are wide in source, clean, free of carbon, flexible, efficient and rich in application scene. The method for preparing hydrogen by electrolyzing water is a relatively convenient method for preparing hydrogen, has the characteristics of environmental protection, flexible production, high purity and the like, and is an ideal green hydrogen production mode. The hydrogen production power supply device and the hydrogen production electrolytic tank are key devices in the water electrolysis hydrogen production system. The hydrogen production power supply device is used for providing direct current required by water electrolysis of the hydrogen production electrolytic tank, is a basic guarantee for operation of a hydrogen production system, is the most core part in the hydrogen production system, is the most key link for influencing hydrogen production efficiency and safety, and is the part with the largest cost ratio in the hydrogen production system, so that detection and analysis of the state of the hydrogen production electrolytic tank in the working process of the hydrogen production power supply device are necessary measures for guaranteeing hydrogen production safety and prolonging the service life of the electrolytic tank.
In the prior art, the electrolytic water hydrogen production power supply device only can realize the output function of an electrolytic direct current power supply, and detection equipment is required to be additionally arranged for the state detection and analysis of the electrolytic tank, namely the state detection of the electrolytic tank and the hydrogen production power supply are independently executed, and the scheme has the following problems:
1. The traditional state detection equipment can only realize detection with a single function, such as single insulation detection, impedance detection and the like, so that a plurality of detection equipment with different functions are required to be arranged for the electrolytic tank at the same time, and the traditional state detection equipment has the advantages of high realization cost, large whole system volume, high weight, high control complexity and low efficiency. In addition, multiple decentralized functions make it difficult to achieve systematic cell health management.
2. Some important states of the electrolytic cell are usually required to be represented and detected under the condition of external power supply excitation, for example, insulation detection and impedance detection of the electrolytic cell can be measured and calculated under the condition of external power supply excitation, so that external power supply excitation is additionally introduced for realizing state detection of the electrolytic cell, and the realization cost and the control complexity are further increased.
3. The detection of various electrolytic tanks can only be carried out off-line, but not in real time on-line in the hydrogen production process, and the off-line detection means that the 'maintenance' health detection can only be carried out at each stop interval of the electrolytic tank, so that the time and the labor are consumed, and the abnormal state of the electrolytic tank is difficult to discover in time.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems existing in the prior art, the invention provides the hydrogen production power supply device and system with the electrolytic cell detection function, which have the advantages of simple implementation method, low cost, small volume and weight, high energy utilization rate and high integration degree, and the control method with the advantages of simple implementation method and high control efficiency, and can realize the online detection of the state of the electrolytic cell in the hydrogen production process, so that the abnormal state of the electrolytic cell can be timely and rapidly found.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the utility model provides a hydrogen manufacturing power supply device with electrolysis trough detects function, includes control module and respectively with power supply main circuit module, power detection module and the electrolysis trough detection module that control module is connected, the input of power supply main circuit module connects the input power, and the electrolysis trough is connected in order to provide required direct current to the electrolysis trough to the output, power detection module still with power supply main circuit module is connected, in order to be used for detecting power supply main circuit module's state information in the operation, electrolysis trough detection module still is connected with the electrolysis trough in order to be used for detecting the state information of electrolysis trough, control module respectively receive the state information of power detection module detection the state information of electrolysis trough that electrolysis trough detection module detected, control power supply main circuit module, electrolysis trough.
Further, the state information of the power supply main circuit module in the operation process comprises any one or more of input end voltage/current, intermediate link voltage/current, output end voltage/current, temperature state and switch state, and the temperature state comprises the temperature of the power supply main circuit module and/or the temperature of components in the power supply main circuit module.
Further, the power supply detection module comprises a first detection unit for detecting voltage/current, a second detection unit for detecting temperature state and a third detection unit for detecting switch state.
Further, the state information of the electrolytic tank comprises any one or more of an insulating state, a pressure state, a temperature state, an impedance state, a cell voltage and a gas concentration of the electrolytic tank.
Further, the control module comprises a data processing unit and a control unit which are connected with each other, the data processing unit is used for evaluating the state of the hydrogen production power supply according to the state information detected by the power supply detection module, evaluating the state of the electrolytic cell according to the state information of the electrolytic cell detected by the electrolytic cell detection module, outputting a state evaluation result to the control unit, and the control unit is used for controlling the state of the power supply main circuit module according to the state evaluation result of the hydrogen production power supply output by the data processing unit and controlling the state of the electrolytic cell according to the state evaluation result of the electrolytic cell.
Further, the automatic insulation detection device also comprises an insulation detection control module which is respectively connected with the control module and the power supply main circuit module, and is used for controlling to disconnect the connection between the cathode of the electrolytic cell and the ground when the electrolytic cell is subjected to insulation detection, and controlling to provide the voltage output by the power supply main circuit module between the anode and the cathode of the electrolytic cell and the ground so as to realize automatic insulation detection of the electrolytic cell.
Further, the insulation detection control module comprises a bipolar change-over switch K2, a short-circuit switch K3 and a current-limiting resistor R1, wherein the positive input end and the output end of the bipolar change-over switch K2 are respectively connected with the positive electrode of the power supply main circuit module and the electrode of the electrolytic tank, the input end and the output end of the negative electrode of the bipolar change-over switch K2 are respectively connected with the negative electrode of the power supply main circuit module and the current-limiting resistor R1, the other end of the current-limiting resistor R1 is grounded, and the two ends of the short-circuit switch K3 are respectively connected with the positive electrode and the negative electrode of the electrolytic tank.
Furthermore, the control module realizes automatic insulation detection of the electrolytic cell by controlling the connection and disconnection of the grounding switch K0, the bipolar change-over switch K2 and the short-circuit switch K3 between the negative electrode of the electrolytic cell and the ground.
Further, the insulation detection control module further comprises a leakage current detection circuit arranged on the grounding loop of the current limiting resistor R1 and used for detecting the grounding current of the loop where the current limiting resistor R1 is located, so that the grounding current of the main loop of the electrolytic tank is obtained.
A hydrogen-producing power supply system, comprising:
a hydrogen production power supply device as described above;
an electrolytic cell;
the input end of the hydrogen production power supply device is connected with an input power supply, and the output end of the hydrogen production power supply device is connected with the electrolytic tank.
Further, the hydrogen production device also comprises a control interaction device connected with the hydrogen production power supply device, and the control interaction device is used for receiving output data of the hydrogen production power supply device and sending a control instruction to the hydrogen production power supply device.
The control method for the hydrogen production power supply device comprises the following steps:
respectively receiving the state information detected by the power supply detection module and the state information of the electrolytic tank detected by the electrolytic tank detection module;
the state of the hydrogen production power supply is estimated according to the state information detected by the power supply detection module, and the state of the electrolytic tank is estimated according to the state information of the electrolytic tank detected by the electrolytic tank detection module;
and controlling the hydrogen production power supply device according to the state evaluation result of the hydrogen production power supply and the state evaluation result of the electrolytic cell, and controlling the electrolytic cell according to the state evaluation result of the electrolytic cell.
Further, the control of the hydrogen production power supply device according to the state evaluation result of the hydrogen production power supply includes performing any one or more of input protection, synchronous control, closed-loop control, over-temperature protection, overvoltage and over-current protection, precharge control, logic control and protection, wherein any one of the input protection, synchronous control and closed-loop control is performed according to the voltage/current of the input end of the power supply main circuit module detected by the power supply detection module, the input protection includes any one of overvoltage, under-voltage, over-current, over-frequency and under-frequency protection, the closed-loop control includes closed-loop control for resonance elimination control or inversion control, the over-temperature protection is performed according to the temperature of the power supply key component detected by the power supply detection module, the overvoltage and over-current protection and precharge control are performed according to the detected intermediate link voltage/current, and the logic control and protection are performed according to the detected switch state.
Further, according to the state information of the electrolytic tank detected by the electrolytic tank detection module, the state of the electrolytic tank is estimated and comprises any one or more of an insulating state, a pressure state, a temperature state, an impedance state, a cell voltage state and a gas concentration state of the electrolytic tank, the electrolytic tank is controlled according to the state estimation result of the electrolytic tank, the electrolytic tank is controlled to be opened and closed by a valve and/or a fault cell bypass of the electrolytic tank, and the hydrogen production power supply is controlled to be tripped and/or blocked by a pulse and/or run down by a power supply.
Further, when evaluating the impedance state of the electrolytic cell, the control module specifically performs the steps of:
controlling the voltage output by the power supply main circuit module to be applied between the anode and the cathode of the electrolytic cell as excitation;
detecting electrolytic current generated between the anode and the cathode of the electrolytic cell;
calculating the impedance value of the electrolytic tank according to the voltage output by the power supply main circuit module and the detected electrolytic current;
and judging the impedance state of the electrolytic cell according to the calculated impedance value of the electrolytic cell.
Further, when evaluating the cell voltage status of the electrolytic cell, the control module specifically performs the steps of:
Controlling and detecting the voltage of each cell in the electrolytic cell;
judging whether abnormality exists according to the voltage of each cell;
and according to the judgment result of the voltages of the cells, controlling to execute protection or early warning if the abnormal voltage of the cells exists.
The control method for the hydrogen production power supply device comprises the steps of executing an electrolytic cell insulation detection control step through a control module, and specifically comprises the following steps:
controlling to short-circuit the anode and the cathode of the electrolytic tank and disconnect the connection between the anode of the electrolytic tank and the ground;
controlling to apply the output electric energy of the power supply main circuit module between the anode and the cathode of the electrolytic cell and the ground as external excitation;
detecting the earth leakage current of the main circuit of the electrolytic cell;
and judging the insulation state of the electrolytic cell according to the detected leakage current.
Further, in the step of insulating detection of the electrolytic cell controlled by the control module, a shorting switch K3 connected between the anode and the cathode of the electrolytic cell is controlled to be closed so as to control the anode and the cathode of the electrolytic cell to be shorted, and a bipolar change-over switch K2 is controlled to be closed so that hydrogen production power supply output is added between the electrode of the electrolytic cell and the ground; the anode input end and the output end of the bipolar change-over switch K2 are respectively connected with the anode of the power supply main circuit module and the electrode of the electrolytic tank, the cathode of the bipolar change-over switch K2 is respectively connected with the cathode of the hydrogen production power supply and the current limiting resistor R1, and the other end of the current limiting resistor R1 is grounded; the voltage output by the power supply main circuit module is applied between the anode and the cathode of the electrolytic cell and the ground as external excitation, and the constructed test loop current is detected to obtain the earth leakage current of the electrolytic cell main loop.
The control method for the hydrogen production power supply device comprises the following steps:
initializing and performing system self-checking when the hydrogen production power supply device is started;
judging whether insulation detection is carried out after the system self-checking is finished;
if insulation detection is needed, controlling to execute insulation detection according to the control method;
waiting for interrupt triggering conditions, wherein an interrupt triggering condition is set for each electrolytic cell detection type, and the electrolytic cell detection type comprises any one of electrolytic cell pressure detection, electrolytic cell impedance detection, electrolytic cell voltage detection and electrolytic cell gas concentration;
and when the interrupt trigger condition is received, executing detection corresponding to the interrupt trigger condition according to the control method.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, the power supply function of the hydrogen production power supply and the state detection function of the electrolytic cell are fused, so that the hydrogen production power supply device with the state detection function of the electrolytic cell is realized, the hydrogen production power supply and the health management function of the electrolytic cell can be realized by one set of hydrogen production power supply device, the realization cost and the whole volume weight of the system can be effectively reduced, no additional detection equipment is required, the hydrogen production power supply function can be fully utilized as external excitation for the detection of the electrolytic cell, the energy utilization rate and the control efficiency are improved, and meanwhile, the state detection of the electrolytic cell can be realized in real time in the hydrogen production process, so that the tiny damage and abnormality of the electrolytic cell can be timely found, and the safe and stable operation of the hydrogen production system can be better ensured.
2. According to the invention, the direct current output by the hydrogen production power supply is further added between the electrode of the electrolytic tank and the ground through the insulation detection control module, and the loop current is detected, so that the insulation state of the electrolytic tank can be detected, the insulation detection of the electrolytic tank and the power supply process of the hydrogen production power supply can be effectively fused, a hydrogen production power supply device with an automatic insulation detection function is formed, the insulation detection of the electrolytic tank can be automatically realized without configuring an independent insulation detection device of the electrolytic tank, the safe operation of a hydrogen production system can be further ensured, the realization cost is further reduced, and the realization efficiency and the intelligent degree are improved.
3. The invention further provides a change-over switch, a short-circuit switch, a current-limiting resistor and a leakage current detection circuit, which can automatically switch and apply the direct current output by the hydrogen production power supply between the electrode of the electrolytic cell and the ground to detect the loop current, thereby conveniently and rapidly realizing insulation detection and further improving the detection efficiency and the intelligent degree of the electrolytic cell.
4. The invention further enables the hydrogen production power supply device to have the functions of insulation detection, impedance detection, cell voltage detection, gas concentration detection, cell pressure detection and other electrolytic cell detection, and a set of health management system of the hydrogen production electrolytic cell can be constructed, so that perfect health management of the hydrogen production power supply device and the electrolytic cell is formed, thereby ensuring the safety and reliability of the hydrogen production power supply device to the greatest extent and prolonging the service life of the electrolytic cell; the detection functions are further managed in the form of interrupt subroutines, so that the use efficiency of a control system CPU can be improved, and function priority management and function shielding can be conveniently performed.
Drawings
Fig. 1 is a schematic diagram of the structure of a hydrogen production power supply device with an electrolytic cell detection function according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a hydrogen production power supply device with an electrolytic cell detection function according to embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of the structure of a hydrogen-producing power supply device (having an insulation detection function) in embodiment 3 of the present invention.
FIG. 4 is a schematic diagram of the implementation flow of the control of insulation detection of an electrolytic cell in example 3 of the present invention.
FIG. 5 is a schematic diagram showing a detailed implementation flow of the automatic insulation detection control for an electrolytic cell in embodiment 3 of the present invention.
FIG. 6 is a schematic flow chart showing the implementation of the control method for detecting the impedance state of the electrolytic cell in embodiment 4 of the present invention.
FIG. 7 is a schematic flow chart showing the implementation of the control method for detecting the cell voltage state of the electrolytic cell in embodiment 5 of the present invention.
Fig. 8 is a detailed implementation flow chart of the control of the hydrogen production power supply device in embodiment 6 of the present invention.
Legend description: 1. a control module; 2. a power supply main circuit module; 3. a power supply detection module 4 and an electrolytic cell detection module; 5. and the insulation detection control module.
Detailed Description
The invention is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the invention is not limited thereby.
As used in this disclosure, the terms "a," "an," "the," and/or "the" are not intended to be limiting, but rather are to be construed as covering the singular and the plural, unless the context clearly dictates otherwise. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The hydrogen production power supply function and the electrolytic cell detection function are both electrical functions, and have strong correlation. For example, various detection items of the detection function of the electrolytic cell need to be carried out in the power supply state of the electrolytic cell, such as impedance detection, detection of total voltage flow and cell voltage, detection of gas concentration, detection of device pressure and the like, while the power supply output of the hydrogen production power supply needs to be adjusted according to the state of the electrolytic cell, such as direct shutdown or even tripping of the high-voltage switch of the power supply device under abnormal conditions such as insulation failure, abnormal impedance and the like of the electrolytic cell. And when the hydrogen production power supply realizes the power supply function, parameters such as terminal voltage and current of the electrolytic tank are required to be collected for control and protection, and the state detection function of the electrolytic tank also requires to collect parameters such as terminal voltage and current of the electrolytic tank, for example, terminal voltage and current are collected for calculating the impedance of the electrolytic tank, so that the power supply function of the hydrogen production power supply and the state detection function of the electrolytic tank can be realized, and the data collection and detection requirements are the same. In addition, the realization of the hydrogen production power supply function and the electrolytic cell detection function requires the configuration of a control system for calculation, display, communication and the like, so that corresponding acquisition channels or sensing equipment and the control system can be shared to realize organic integration.
The invention considers the characteristics between the power supply of the hydrogen production power supply and the state detection of the electrolytic cell, and realizes the hydrogen production power supply device with the state detection function of the electrolytic cell by fusing the power supply function of the hydrogen production power supply and the state detection function of the electrolytic cell, so that the hydrogen production power supply and the health management function of the electrolytic cell can be realized by one set of hydrogen production power supply device, the realization cost can be effectively reduced, the whole volume weight of the system is not required, the detection equipment is not required to be additionally arranged, the power supply function of the hydrogen production power supply can be fully utilized as external excitation for the detection of the electrolytic cell, the energy utilization rate and the control efficiency are improved, and meanwhile, the state detection of the electrolytic cell can be realized in real time in the hydrogen production process, so that the tiny damage and abnormality of the electrolytic cell can be timely found, the safe and stable operation of the hydrogen production system is better ensured, and the service life of the hydrogen production system which is the core equipment of the electrolytic cell is improved.
Example 1:
as shown in fig. 1, the hydrogen production power supply device with the electrolytic cell detection function in this embodiment includes a control module 1, and a power supply main circuit module 2, a power supply detection module 3 and an electrolytic cell detection module 4 which are respectively connected with the control module 1, wherein an input end of the power supply main circuit module 2 is connected with an input power supply, an output end of the power supply main circuit module 2 is connected with the electrolytic cell to provide required direct current for the electrolytic cell, the power supply detection module 3 is also connected with the power supply main circuit module 2 to be used for detecting state information of the power supply main circuit module 2 in an operation process, the electrolytic cell detection module 4 is also connected with the electrolytic cell to be used for detecting state information of the electrolytic cell, and the control module 1 respectively receives the state information of the electrolytic cell detected by the power supply detection module 3 and the state information of the electrolytic cell detected by the electrolytic cell detection module 4 to control the power supply main circuit module 2 and the electrolytic cell. Through the hydrogen production power supply device, the power supply function of the hydrogen production power supply and the state detection function of the electrolytic tank can be simultaneously realized, so that the power supply process of the hydrogen production power supply and the state detection process of the electrolytic tank can be mutually fused and coordinated. The hydrogen production power supply function can be used as external excitation for the detection of the electrolytic cell, the online detection of the state of the electrolytic cell can be realized, and the detected state of the electrolytic cell can be used as the basis for the adjustment of the hydrogen production power supply function, so that the systematic health management of the hydrogen production electrolytic cell can be conveniently realized, and the safety of a hydrogen production system and the service life of the electrolytic cell are improved.
In this embodiment, the power main circuit module 2 is specifically a primary circuit of the device, including a filtering circuit, a power electronic switching circuit, an input/output switch, and the like, and mainly bears the power transmission function (energy supply) of the hydrogen production power supply device, that is, the power of the power grid or other input power sources is sent to the electrolytic tank after being converted from ac to dc (alternating current to direct current) or from dc to dc (direct current to direct current). The power supply detection module 3 is specifically a detection loop and is responsible for detecting various state parameters of the power supply main circuit module 2 and the relevant positions of the electrolytic tank, and a collector, a sensor and the like can be specifically adopted. The control module 1 is configured to perform a corresponding control function, and the control module 1 may specifically be a secondary system of the device, such as a controller, HMI (human-machine interface), a communication module, a relay system, and the like.
In this embodiment, the state information of the power main circuit module 2 in the operation process specifically includes an input terminal voltage/current, an intermediate link voltage/current, an output terminal voltage/current, a temperature state, a switching state, and the like, and the temperature state includes the temperature of each key component (such as a power unit or a reactor) in the power main circuit module 2, and the like. The power detection module 3 detects the above state information of the power main circuit module 2 during operation, and sends the state information to the control module 1 for corresponding control and protection. It can be understood that the above state information may be selected according to actual requirements, and even other state information may be introduced to meet different requirements. The voltage and current information can be acquired either or both.
In this embodiment, the power detection module 3 includes a first detection unit for detecting voltage/current, a second detection unit for detecting temperature state, and a third detection unit for detecting switch state, that is, the power detection module 3 performs detection in three links:
1) Detection link 1 (first detection unit)
The voltage and the current of the input end of the hydrogen production power supply device are detected to be used for input protection, synchronous reference and closed-loop control of the device. Input protection includes overvoltage, undervoltage, overcurrent, over-frequency, under-frequency protection, and the like. The closed loop control is mainly used for harmonic elimination control or inversion control.
2) Detection link 2 (second detection unit)
The temperature of a power module of a power unit of the hydrogen production power supply device, the temperature of components (such as a power unit, a reactor and other key components), voltage and current in an intermediate link, a switching state and the like are detected. The module temperature and the component temperature are mainly used for over-temperature protection. The intermediate link voltage is mainly used for overvoltage and overcurrent protection and precharge control. The switch states mainly include breaker states, contactor states, fuse states, etc., for logic control and protection.
3) Detection link 3 (third detection unit)
The detection hydrogen production power supply device finally outputs direct-current voltage and current, and the voltage and the current are simultaneously input voltage and current of the electrolytic tank. The voltage and current data of the detection link are mainly used for overvoltage and overcurrent protection, closed-loop control, static impedance calculation of the electrolytic cell and the like.
It can be understood that the first to third detecting units may be only one or more than two units according to actual requirements, or more detecting units may be further provided to detect other types of status information.
In this embodiment, the state information of the electrolytic cell detected by the electrolytic cell detecting module 4 includes an insulating state, a pressure state, a temperature state, an impedance state, a cell voltage, a gas concentration, etc. of the electrolytic cell, so as to detect various states of the insulating state, the pressure state, the temperature state, the cell voltage, the gas concentration, etc. The insulation state detection is used for detecting the insulation condition of the anode and the cathode of the electrolytic cell to the ground, and the pressure state detection is used for detecting the pressure in the electrolytic cell in real time so as to evaluate whether the electrolytic cell has structural faults. The cell voltage detection is to detect the voltage of each cell in the electrolytic cell, the normal voltage value of each cell of the hydrogen production electrolytic cell is usually within a certain range (such as 1.8-1.95V), and the running condition of the cell can be evaluated by detecting the voltage of the cell in real time. The gas concentration detection is to detect the purity of the hydrogen and the oxygen separated from the electrolytic cell respectively, and when the purity is too low, the electrolytic cell is characterized by structural failure or diaphragm damage. It will be appreciated that the various conditions of the electrolytic cell described above may be selected according to the actual situation, for example, only one or more types of conditions may be detected, although other types of conditions may be detected according to the actual requirements.
In this embodiment, the control module 1 includes a data processing unit and a control unit that are connected to each other, where the data processing unit is configured to evaluate the state of the hydrogen production power supply according to the state information detected by the power detection module 3, and evaluate the state of the electrolytic cell according to the state information of the electrolytic cell detected by the electrolytic cell detection module 4, and output the state evaluation result to the control unit, and the control unit controls the state of the power supply main circuit module 2 according to the state evaluation result of the hydrogen production power supply output by the data processing unit, and controls the state of the electrolytic cell according to the state evaluation result of the electrolytic cell.
In a specific application embodiment, each detection link of the power supply detection module 3 and the electrolytic tank detection module 4 is used for monitoring each item of state data of the power supply system and the electrolytic tank in real time, the data are transmitted to the control module 1, the data are processed and analyzed by the data processing unit, the power supply state and the health condition of the electrolytic tank are evaluated in real time, and the control unit controls output according to an evaluation result, wherein when the power supply main circuit module 2 is controlled, the control comprises start and stop, pulse regulation, fault protection and the like; when the electrolytic cell is controlled, the control includes opening and closing of the valve of the electrolytic cell, bypass of the fault cell, etc. Further, the protection tripping operation of the input switch cabinet at the input side of the hydrogen production power supply device can be configured and the control of corresponding protection logic interlocking and the like can be performed with the upper computer system. The control module 1 may be further configured to upload the status data detection result and the processing result to the host computer system, and display, store, print, etc. on the HMI.
The embodiment further includes a hydrogen generation power supply system including:
a hydrogen production power supply device as described above;
an electrolytic cell;
the input end of the hydrogen production power supply device is connected with an input power supply, and the output end is connected with the electrolytic tank.
In this embodiment, the hydrogen production control device further includes a control interaction device connected to the hydrogen production power supply device, for receiving output data of the hydrogen production power supply device and sending a control command to the hydrogen production power supply device. The control interaction device can be an upper computer system, a remote server and other equipment.
The control method for the hydrogen production power supply device according to the embodiment includes the following steps:
s101, respectively receiving state information detected by a power supply detection module 3 and state information of an electrolytic tank detected by an electrolytic tank detection module 4;
s102, evaluating the state of the hydrogen production power supply according to the state information detected by the power supply detection module 3, and evaluating the state of the electrolytic cell according to the state information of the electrolytic cell detected by the electrolytic cell detection module 4;
s103, controlling the hydrogen production power supply device according to the state evaluation result of the hydrogen production power supply and the state evaluation result of the electrolytic cell, and controlling the electrolytic cell according to the state evaluation result of the electrolytic cell.
In step S103, the control module 1 controls the hydrogen production power supply device according to the state evaluation result of the hydrogen production power supply, including performing input protection, synchronization control, closed loop control, over-temperature protection, overvoltage and over-current protection, precharge control, logic control, protection, and the like, where input protection, synchronization control, closed loop control, and the like are performed according to the voltage and current at the input end of the power supply main circuit module 2 detected by the power supply detection module 3, input protection includes overvoltage, undervoltage, overcurrent, over-frequency, underfrequency protection, and the like, closed loop control includes closed loop control for resonance elimination control or inversion control, over-temperature protection is performed according to the temperature of the components (such as the power module, the reactor, and the like) of the power supply main circuit module 2 detected by the power supply detection module 3, overvoltage and over-current protection and precharge control are performed according to the detected intermediate link voltage/current, and logic control and protection are performed according to the detected switch state.
In the step S102, the state of the electrolytic cell is estimated according to the state information of the electrolytic cell detected by the electrolytic cell detecting module 4, including the insulating state, the pressure state, the temperature state, the impedance state, the cell voltage state, the gas concentration state, etc., and the control module 1 controls the electrolytic cell according to the state estimation result of the electrolytic cell, including controlling the valve opening and closing of the electrolytic cell, the fault cell bypass, etc.
According to the embodiment, through the control method, the states of the hydrogen production power supply and the electrolytic tank are detected in real time, corresponding control and protection are performed according to the states of the hydrogen production power supply, and the electrolytic tank is controlled according to the states of the electrolytic tank, so that efficient and stable power supply of the hydrogen production power supply can be realized, meanwhile, the state detection of the electrolytic tank is performed on line in real time in the hydrogen production process, when the abnormality of the electrolytic tank is detected, the corresponding control and protection can be performed in time, and the safety and reliability of hydrogen production are ensured.
Example 2:
the difference between this embodiment and the embodiment is that, as shown in fig. 2, the power main circuit module 2 is specifically a power unit (including a primary loop of a filter loop, a power electronic switch circuit, an input/output switch, etc.), and the power detection module 3, the electrolytic cell detection module 4, and the control module 1 are integrally implemented by one control unit, that is, the control unit jointly implements the state information detection of the power unit, the state detection of the electrolytic cell, and the control functions of the power unit and the electrolytic cell, which can further improve the integration degree of the device, reduce the implementation cost, and reduce the weight and volume of the device.
Specifically, the control unit specifically includes a controller, HMI (human-machine interaction), a sensing circuit, a secondary system such as a communication module, a relay system, and a detection circuit. The power unit is connected to the power grid through the input switch cabinet, and the control unit is also connected with the upper computer system in a communication way.
In this embodiment, the control unit performs the state information detection of the power unit and the state information detection of the electrolytic cell at the same time, and specifically includes the following four detection links:
1) Detection procedure 1
The voltage and current of the input end of the hydrogen production power supply device are detected and used for input protection, synchronous reference and closed-loop control of the device. The input protection mainly comprises overvoltage, undervoltage, overcurrent, over-frequency, under-frequency protection and the like. The closed loop control is mainly used for harmonic elimination control or inversion control.
2) Detection link 2
Detecting the temperature of a power module of a power unit, the temperature of a reactor, the voltage and current of an intermediate link, the state of a switch and the like of the hydrogen production power supply device. The module temperature and the temperature of components (such as a reactor and other key components) are mainly used for over-temperature protection. The voltage and voltage in the middle link are mainly used for overvoltage and overcurrent protection and precharge control. The switch states mainly include breaker states, contactor states, fuse states, etc., for logic control and protection.
3) Detection link 3
The detection hydrogen production power supply device finally outputs direct-current voltage and current, and the voltage and the current are simultaneously input voltage and current of the electrolytic tank. The voltage and current data of the detection link are mainly used for overvoltage and overcurrent protection, closed-loop control and static impedance calculation of the electrolytic tank.
4) Detection link 4
The method comprises the steps of detecting an insulating state, a pressure state, a temperature state, a cell voltage, a gas concentration and the like of an electrolytic cell, wherein the insulating state detection is used for detecting the insulation condition of an anode and a cathode of the electrolytic cell to the ground, the pressure state is used for evaluating whether the electrolytic cell has a structural fault or not, the operation condition of the cell is evaluated by detecting the voltage of the cell in real time, the gas concentration is detected and used for respectively detecting the purity of hydrogen and oxygen separated by the electrolytic cell, and the structural fault or diaphragm damage of the electrolytic cell is represented when the purity is too low.
The control unit in the embodiment monitors the state data of the hydrogen production power supply device and the electrolytic tank through the detection links, processes and analyzes the detection data, evaluates the state of the power unit and the health condition of the electrolytic tank in real time, and controls the power unit and the electrolytic tank according to the evaluation result. The detected data can be displayed and stored on the HMI and transmitted to the upper computer system through communication.
Example 3:
the traditional hydrogen production power supply device does not have an electrolytic cell insulation detection function, the insulation state of the electrolytic cell is usually required to be detected before the hydrogen production power supply device outputs power for the electrolytic cell, and the insulation detection of the electrolytic cell can be measured and calculated only under the excitation of an external power supply. The embodiment further provides the hydrogen production power supply device with an electrolytic cell insulation detection function based on embodiment 2, wherein the direct current power supply function of the hydrogen production power supply is used as external excitation of insulation detection, the direct current output by the hydrogen production power supply is added between the electrode and the ground of the electrolytic cell based on the power supply function of the hydrogen production power supply, and then the loop current at the moment is detected to obtain the floor drain current of the main loop of the electrolytic cell, so that the insulation state of the electrolytic cell can be judged according to the leakage current.
As shown in fig. 3, the hydrogen production power supply device of this embodiment further includes an insulation detection control module 5 respectively connected to the control unit (corresponding to the control module 1, the power detection module 3, and the electrolytic cell detection module 4 in embodiment 1) and the power unit (corresponding to the power main circuit module 2 in embodiment 1), for controlling to disconnect the connection between the negative electrode of the electrolytic cell and the ground and for controlling to supply the voltage output by the power unit between the positive electrode and the negative electrode of the electrolytic cell and the ground when performing insulation detection on the electrolytic cell, so as to implement automatic insulation detection on the electrolytic cell. According to the embodiment, the insulation detection control module 5 is further arranged on the basis of the hydrogen production power supply device in the embodiment 2, direct current output by the hydrogen production power supply is added between the electrode of the electrolytic tank and the ground based on the insulation detection control module 5, the grounding current of the loop where the insulation detection control module 5 is located is detected, the current is the floor drain current of the main loop of the electrolytic tank, the insulation state of the electrolytic tank can be detected, the insulation detection of the electrolytic tank and the power supply process of the hydrogen production power supply can be effectively fused, an independent insulation detection device of the electrolytic tank is not required to be configured, the insulation detection of the electrolytic tank can be automatically realized, the realization cost can be further reduced, and the realization efficiency and the intelligent degree are improved.
As shown in fig. 4, the step of controlling the insulation detection of the electrolytic cell by the insulation detection control module 5 in this embodiment includes:
s301, controlling to short-circuit the anode and the cathode of the electrolytic cell and disconnect the connection between the anode of the electrolytic cell and the ground;
s302, controlling to apply the output electric energy of the power unit between the anode and the cathode of the electrolytic cell and the ground to serve as external excitation;
s303, detecting the earth leakage current of the main circuit of the electrolytic cell;
s304, judging the insulation state of the electrolytic cell according to the detected leakage current.
In the above step S304, if the detected main circuit-to-floor drain current I of the electrolytic cell is smaller than the reference leakage current I ref And judging that the insulation state is abnormal, otherwise, judging that the insulation state is normal. Reference leakage current I ref The magnitude of the external excitation voltage U is related to the minimum value R0 of the allowable insulation resistance of the electrolytic cell and the resistance R of the current-limiting resistance R1 of the insulation detection circuit, and is generally: i ref <U(R 0 +r). The leakage current I may specifically be an average leakage current over a period of time. If the insulation state detection result is normal, the hydrogen production process can be normally carried out; if the detection result is abnormal, alarming is carried out to prompt that the electrolytic cell needs to be checked and maintained.
In this embodiment, as shown in fig. 3, the insulation detection control module 5 specifically includes a bipolar switch K2, a shorting switch K3, and a current limiting resistor R1. The positive input end and the output end of the bipolar change-over switch K2 are respectively connected with the positive electrode of the power supply main circuit module 2 and the electrode of the electrolytic tank, the negative electrode of the hydrogen production power supply and the current limiting resistor R1 are respectively connected with the input end and the output end of the negative electrode of the bipolar change-over switch K2, the other end of the current limiting resistor R1 is grounded, and the two ends of the short circuit switch K3 are respectively connected with the positive electrode and the negative electrode of the electrolytic tank. The direct current output by the hydrogen production power supply is added between the electrode of the electrolytic tank and the ground through switching of the switch, and the ground leakage current of the main loop of the electrolytic tank is obtained by detecting the loop current, so that the insulation state of the electrolytic tank can be judged. The control module 1 realizes automatic insulation detection of the electrolytic cell by controlling the opening and closing of a grounding switch K0, a change-over switch K2 and a short-circuit switch K3 between the cathode of the electrolytic cell and the ground. The shorting switch K3 is a single-pole switch.
In this embodiment, the insulation detection control module 5 further includes a leakage current detection circuit disposed in the grounding loop of the current limiting resistor R1, so as to detect the grounding current of the loop where the current limiting resistor R1 is located, where the current is the earth leakage current of the main loop of the electrolytic tank. The current detection circuit may specifically employ a leakage current sensor BC1 or the like. The control unit can rapidly judge the insulation state of the electrolytic tank according to the magnitude of the leakage current by detecting the leakage current detected by the leakage current detection circuit.
According to the embodiment, the bipolar change-over switch K2, the short-circuit switch K3, the current-limiting resistor R1 and the leakage current detection circuit are additionally arranged on the direct-current output side of the power unit, direct current output by the hydrogen production power supply can be automatically added between the electrode of the electrolytic tank and the ground by controlling the change-over switch K2 and the short-circuit switch K3, an insulation detection loop is formed, loop current is detected, insulation detection can be conveniently and rapidly realized, and the detection efficiency and the intelligent degree of the electrolytic tank are further improved.
In the embodiment, when the control unit controls the insulation detection of the electrolytic tank, the short-circuit switch K3 connected between the positive electrode and the negative electrode of the electrolytic tank is specifically controlled to be closed so as to control the short-circuit of the positive electrode and the negative electrode of the electrolytic tank, and the change-over switch K2 is controlled to connect the output positive electrode of the hydrogen production power supply with the electrolytic tank and the output negative electrode of the hydrogen production power supply with the ground through the current-limiting resistor R1. The voltage output by the power unit is applied between the anode and the cathode of the electrolytic cell and the ground as external excitation, and the current of the insulation detection loop formed by construction is detected to judge the insulation state of the electrolytic cell.
Since the negative electrode of the electrolytic cell is normally grounded, it is necessary to turn off the grounding switch K0 of the negative electrode of the electrolytic cell first to perform insulation detection. In a specific application embodiment, as shown in fig. 5, after the hydrogen production power supply device is started, an advanced travel sequence is initialized and a system self-check is performed, and after the self-check passes, whether insulation detection is needed is checked. If the insulation detection requirement is not met, the system is in a standby state, and a process instruction is waited. If insulation detection is required, the hydrogen production power supply direct current output isolating switch K1 is firstly disconnected, then the negative electrode grounding switch K0 of the hydrogen production power supply is disconnected, and then the positive and negative electrode shorting switch K3 and the switching switch K2 are sequentially switched on. After the switch operation is completed, the hydrogen production power supply device stabilizes and outputs according to a preset voltage U, the voltage is added between the anode and the cathode of the electrolytic cell and the ground, and the current sampling current I output by the leakage current sensor BC1 at the moment is detected. If I is less than Iref, the system insulation state of the electrolytic tank is good, then the hydrogen production power supply output is stopped, then K2, K3 and K0 are sequentially cut off, then the system is in a system standby state, and further process instructions are waited. If I is not less than Iref, the insulation state of the electrolytic tank system is abnormal, then the hydrogen production power supply output is stopped, then K2, K3 and K0 are sequentially cut off, then the system is in a standby state, and further process instructions are waited. When the insulation abnormality of the electrolytic cell is detected, the hydrogen production power supply device should report a corresponding fault and prohibit the K1 from being switched on and the hydrogen production power supply device from outputting. The Iref is an insulation state judgment threshold leakage current, and the value is specifically related to the U, the current limiting resistance R0 and the resistance R of the allowable insulation resistance R1 of the electrolytic cell. Preferably, iref is required to satisfy Iref < U/(r0+r), where U is typically hundreds of volts and R is typically several mega ohms, so Iref is less than milliamp.
In a specific selection, the magnitude of the current limiting electric value R0, the measuring range of the current sensor BC1 and the rated currents of the K2 and K3 can be comprehensively considered, so that when r=0 (i.e. the electrode of the electrolytic cell is grounded), the current flowing through the K2 and the K3 is below the rated current of the switch of the electrolytic cell during insulation detection, and the current is not suitable to exceed the measuring range of the current sensor BC 1.
In order to ensure the operation safety of the hydrogen production system, the insulation detection can be set as a necessary item before the hydrogen production power supply is started and output, namely, before the hydrogen production power supply device is operated, the insulation detection is carried out according to the steps, and after the insulation detection is passed, the hydrogen production power supply device is started.
The electrolytic bath insulation detection is a key procedure before the hydrogen production power supply supplies power to the electrolytic bath, and the hydrogen production power supply device with the automatic insulation detection function is formed by fusing the hydrogen production power supply with the insulation detection function, so that the hydrogen production power supply device can simultaneously have the hydrogen production power supply and the electrolytic bath insulation detection function, the safe operation of a hydrogen production system can be better ensured, the realization cost of the system is greatly reduced, and the degree of automation is improved.
Example 4:
as shown in fig. 6, in this embodiment, based on embodiment 1, impedance state detection is performed on the electrolytic cell by the control module 1, and specific steps include:
S401, controlling the voltage output by the power supply main circuit module 2 to be applied between the anode and the cathode of the electrolytic cell as excitation;
s402, detecting electrolytic current generated between the anode and the cathode of the electrolytic tank;
s403, calculating the impedance value of the electrolytic tank according to the voltage output by the power supply main circuit module 2 and the detected electrolytic current;
s404, judging the impedance state of the electrolytic cell according to the calculated impedance value of the electrolytic cell.
According to the embodiment, the direct current voltage U output by the hydrogen production power supply is applied between the anode and the cathode of the electrolytic tank to generate corresponding electrolytic current I, so that the output electric energy of the hydrogen production power supply is used as excitation for impedance detection, the impedance Z of the electrolytic tank at the moment can be calculated according to the ohm theorem, if the impedance value is in a normal impedance range (Zmin and Zmax), the electrolytic tank is normal, otherwise, the electrolytic tank is abnormal, the functions of hydrogen production power supply and electrolytic tank impedance state detection can be fully fused, and the hydrogen production power supply device can also realize electrolytic tank impedance state detection in the hydrogen production power supply process. The impedance detection flow shown in fig. 6 is a flow of an impedance detection interrupt program execution cycle of the hydrogen production power supply. The impedance abnormality result obtained from one execution period is not high in accuracy of judging the impedance state of the electrolytic tank, and in order to improve the control accuracy, when the detection results in a plurality of interrupt periods indicate the impedance abnormality, the corresponding protection actions such as stopping, tripping a high-voltage switch and the like can be controlled to be executed.
Example 5:
as shown in fig. 7, in this embodiment, on the basis of embodiment 1, the cell voltage state detection is performed on the electrolytic cell by the control module 1, and the steps include:
s501, controlling and detecting the voltage of each small chamber in the electrolytic bath;
s502, judging whether abnormality exists according to the voltage of each cell;
s503, according to the judgment result of the voltage of each cell, if the voltage of the cell is abnormal, the control is performed to protect or early warn.
The theory of optimum state of the voltage of each cell is completely consistent when the cell is operated electrolytically. In order to introduce a certain detection margin, when the voltage of any cell is within a certain deviation range of a standard ideal voltage, the cell can be judged to be in a normal state, and when the voltage of the cell exceeds the deviation range and is within a normal voltage range of the cell, the hidden danger exists in the cell; when the cell voltage is outside the cell normal voltage range, it is indicative that the cell has been damaged.
In a specific embodiment, the normal voltage range of the cell is (Umin, umax) and a voltage outside this range indicates that the cell is damaged. It is assumed that one cell consists of b loops in parallel, and each loop consists of a cells in series, i.e. the cell consists of a×b cells in total. Let the cell operating terminal voltage be U0, the average voltage per cell is uavg=uo/a, irrespective of the other circuit pressure drops.
In order to improve the service life of the electrolytic tank, the voltage of each cell in working is required to be as consistent as possible, the voltage can be controlled in a certain deviation range, the risk is prompted when the voltage of one cell exceeds the range, and then the electrolytic tank is immediately stopped for inspection or is stopped for inspection after the completion of the production task. Simply, if the target control range within ±z% of Uavg can be specified, umin < (1-z%) Uavg and (1+z%) Uavg < Umax. For convenience of description, up= (1-z%) Uavg, uq= (1+z%) Uavg is calculated. Ux in fig. 7 is the voltage of any cell, i.e. the voltage of each cell is collected and compared logically accordingly.
Example 6:
as shown in fig. 8, this embodiment is a control method for the hydrogen production power supply device shown in embodiment 1, comprising the steps of:
initializing and performing system self-checking when the hydrogen production power supply device is started;
judging whether insulation detection is carried out after the system self-checking is finished;
controlling the insulation detection method according to embodiment 3 if insulation detection is required;
waiting for interrupt trigger conditions, and setting an interrupt trigger condition for each type of electrolytic cell detection, wherein the electrolytic cell detection type comprises electrolytic cell pressure detection, electrolytic cell impedance detection, electrolytic cell voltage detection, and electrolytic cell gas concentration, and the impedance detection and cell voltage detection can be specifically implemented by adopting detection methods as shown in embodiments 5 and 6.
And when receiving the interrupt trigger condition, executing detection corresponding to the interrupt trigger condition.
The main functions of the hydrogen production power supply device are managed in the form of interrupt subroutines, so that the use efficiency of a control system CPU can be improved, and the function priority management and the function shielding can be conveniently performed.
After the hydrogen production power supply device is started, firstly initializing a program, and then performing system self-checking; because the cathode of the hydrogen production electrolytic tank is usually grounded, whether insulation detection is performed can be selected after the system self-detection is finished; if insulation detection is carried out, firstly disconnecting the cathode of the electrolytic cell from the ground, and restoring the ground after detection. The insulation detection of the electrolytic cell can be specifically configured to be detected only before the start of each production process or during routine inspection, and can be specifically configured according to actual requirements. When the detection is normal, the power supply device enters a system standby state, and waits for the triggering condition of executing each interrupt sub-function to be met. Interrupt trigger conditions typically employ timing triggers, comparison triggers, event triggers, or external input triggers.
According to the embodiment, by the control method, the hydrogen production power supply device has the relatively complete functions of detecting various electrolytic tanks such as insulation detection, impedance detection, cell voltage detection, gas concentration detection and tank pressure detection besides the power supply function, and a set of health management system of the hydrogen production electrolytic tank can be constructed, so that perfect health management of the hydrogen production power supply device and the electrolytic tank is formed, and the safety and reliability of the hydrogen production power supply device are guaranteed to the greatest extent.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. While the invention has been described with reference to preferred embodiments, it is not intended to be limiting. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.
Claims (19)
1. The utility model provides a hydrogen manufacturing power supply device with electrolysis trough detects function, its characterized in that includes control module (1) and respectively with power owner circuit module (2), power detection module (3) and electrolysis trough detection module (4) that control module (1) is connected, the input of power owner circuit module (2) is connected the input power, and the electrolysis trough is connected in order to provide required direct current to the electrolysis trough, power detection module (3) still with power owner circuit module (2) are connected, in order to be used for detecting power owner circuit module (2) state information in the operation, electrolysis trough detection module (4) still are connected with the electrolysis trough in order to be used for detecting the state information of electrolysis trough, control module (1) are received respectively the state information of power detection module (3) detection the state information of electrolysis trough that electrolysis trough detection module (4) detected, control power owner circuit module (2), electrolysis trough.
2. Hydrogen production power supply device with electrolyzer detection function according to claim 1, characterized in that the state information of the power supply main circuit module (2) during operation comprises any one or more of input voltage/current, intermediate link voltage/current, output voltage/current, temperature state and switching state, the temperature state comprising the temperature of the power supply main circuit module (2) and/or the temperature of components in the power supply main circuit module (2).
3. Hydrogen production power supply device with electrolyzer detection function according to claim 2, characterized in that the power supply detection module (3) comprises a first detection unit for detecting voltage/current, a second detection unit for detecting temperature conditions and a third detection unit for detecting switch conditions.
4. The hydrogen-producing power supply device with an electrolytic cell detecting function as claimed in claim 1, wherein the state information of the electrolytic cell includes any one or more of an insulating state, a pressure state, a temperature state, an impedance state, a cell voltage, and a gas concentration of the electrolytic cell.
5. The hydrogen production power supply device with the electrolytic cell detection function according to claim 1, wherein the control module (1) comprises a data processing unit and a control unit which are connected with each other, the data processing unit is used for evaluating the state of the hydrogen production power supply according to the state information of the electrolytic cell detected by the power detection module (3), evaluating the state of the electrolytic cell according to the state information of the electrolytic cell detected by the electrolytic cell detection module (4), outputting the state evaluation result to the control unit, and the control unit is used for controlling the state of the power supply main circuit module (2) according to the state evaluation result of the hydrogen production power supply output by the data processing unit and controlling the state of the electrolytic cell according to the state evaluation result of the electrolytic cell.
6. The hydrogen production power supply device with the electrolytic tank detection function according to any one of claims 1 to 5, further comprising an insulation detection control module (5) respectively connected with the control module (1) and the power supply main circuit module (2) for controlling to disconnect the connection between the cathode of the electrolytic tank and the ground and controlling to supply the voltage output by the power supply main circuit module (2) between the anode and the cathode of the electrolytic tank and the ground when the insulation detection is performed on the electrolytic tank so as to realize automatic insulation detection of the electrolytic tank.
7. The hydrogen production power supply device with the electrolytic tank detection function according to claim 6, wherein the insulation detection control module (5) comprises a bipolar change-over switch K2, a short-circuit switch K3 and a current-limiting resistor R1, the positive input end and the output end of the bipolar change-over switch K2 are respectively connected with the positive electrode of the power supply main circuit module (2) and the electrode of the electrolytic tank, the input end and the output end of the negative electrode of the bipolar change-over switch K2 are respectively connected with the negative electrode of the power supply main circuit module (2) and the current-limiting resistor R1, the other end of the current-limiting resistor R1 is grounded, and two ends of the short-circuit switch K3 are respectively connected with the positive electrode and the negative electrode of the electrolytic tank.
8. The hydrogen production power supply device with the electrolytic tank detection function according to claim 7, wherein the control module (1) realizes automatic insulation detection of the electrolytic tank by controlling the opening and closing of the grounding switch K0, the bipolar transfer switch K2 and the shorting switch K3 between the cathode of the electrolytic tank and the ground.
9. The hydrogen generation power supply device with the electrolytic tank detection function according to claim 7, wherein the insulation detection control module (5) further comprises a leakage current detection circuit arranged in a grounding loop of the current limiting resistor R1 and used for detecting the grounding current of the loop in which the current limiting resistor R1 is positioned, so as to obtain the earth leakage current of the main loop of the electrolytic tank.
10. A hydrogen generation power supply system, comprising:
a hydrogen-producing power supply apparatus as claimed in any one of claims 1 to 9;
an electrolytic cell;
the input end of the hydrogen production power supply device is connected with an input power supply, and the output end of the hydrogen production power supply device is connected with the electrolytic tank.
11. The hydrogen production power supply system of claim 10, further comprising control interaction means coupled to the hydrogen production power supply means for receiving output data from the hydrogen production power supply means and sending control instructions to the hydrogen production power supply means.
12. A control method for the hydrogen production power supply apparatus as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
respectively receiving state information detected by the power supply detection module (3) and state information of the electrolytic tank detected by the electrolytic tank detection module (4);
the state of the hydrogen production power supply is estimated according to the state information detected by the power supply detection module (3), and the state of the electrolytic tank is estimated according to the state information of the electrolytic tank detected by the electrolytic tank detection module (4);
and controlling the hydrogen production power supply device according to the state evaluation result of the hydrogen production power supply and the state evaluation result of the electrolytic cell, and controlling the electrolytic cell according to the state evaluation result of the electrolytic cell.
13. The control method according to claim 12, wherein the controlling the hydrogen production power supply device according to the result of the state evaluation of the hydrogen production power supply includes performing any one or more of input protection, synchronization control, closed-loop control, over-temperature protection, overvoltage-overcurrent protection, precharge control, logic control, and protection, wherein the any one of input protection, synchronization control, and closed-loop control is performed according to the voltage/current of the input terminal of the power main circuit module (2) detected by the power detection module (3), the input protection includes any one of overvoltage, undervoltage, overcurrent, overfrequency, and underfrequency protection, the closed-loop control includes closed-loop control for resonance elimination control or inversion control, the over-temperature protection is performed according to the power key component temperature detected by the power detection module (3), the overvoltage-overcurrent protection and precharge control is performed according to the detected intermediate voltage/current, and the logic control and protection are performed according to the detected switching state.
14. The control method according to claim 12, wherein the state of the electrolytic cell is estimated based on state information of the electrolytic cell detected by the electrolytic cell detection module (4) and includes any one or more of an insulating state, a pressure state, a temperature state, an impedance state, a cell voltage state, and a gas concentration state of the electrolytic cell, controlling the electrolytic cell based on the state estimation result of the electrolytic cell includes controlling valve opening and closing and/or malfunctioning cell bypass of the electrolytic cell, and controlling the hydrogen production power supply includes controlling tripping of an input switch cabinet and/or blocking pulse active power reduction operation.
15. The control method according to claim 14, characterized in that the control module (1) performs in particular the steps comprising:
controlling the voltage output by the power supply main circuit module (2) to be applied between the anode and the cathode of the electrolytic cell as excitation;
detecting electrolytic current generated between the anode and the cathode of the electrolytic cell;
calculating an impedance value of the electrolytic tank according to the voltage output by the power supply main circuit module (2) and the detected electrolytic current;
and judging the impedance state of the electrolytic cell according to the calculated impedance value of the electrolytic cell.
16. The control method according to claim 14, characterized in that the control module (1) performs in particular the steps comprising:
controlling and detecting the voltage of each cell in the electrolytic cell;
judging whether abnormality exists according to the voltage of each cell;
and according to the judgment result of the voltages of the cells, controlling to execute protection or early warning if the abnormal voltage of the cells exists.
17. A control method for a hydrogen production power supply apparatus as claimed in any one of claims 1 to 9, characterized in that the method comprises the step of performing an electrolytic cell insulation detection control by means of a control module (1), the specific steps comprising:
controlling to short-circuit the anode and the cathode of the electrolytic tank and disconnect the connection between the anode of the electrolytic tank and the ground;
controlling to apply the output electric energy of the power supply main circuit module (2) between the anode and the cathode of the electrolytic cell and the ground as external excitation;
detecting the earth leakage current of the main circuit of the electrolytic cell;
and judging the insulation state of the electrolytic cell according to the detected leakage current.
18. The control method according to claim 17, wherein in the step of controlling the insulation detection of the electrolytic cell by the control module (1), a shorting switch K3 connected between the positive and negative poles of the electrolytic cell is controlled to be closed so as to control shorting of the positive and negative poles of the electrolytic cell, and a hydrogen production power supply output is applied between the electrode of the electrolytic cell and the ground by controlling a bipolar changeover switch K2 to be closed; the positive electrode input end and the output end of the bipolar change-over switch K2 are respectively connected with the positive electrode of the power supply main circuit module (2) and the electrode of the electrolytic tank, the negative electrode of the bipolar change-over switch K2 is respectively connected with the negative electrode of the hydrogen production power supply and the current limiting resistor R1, and one end of the current limiting resistor R1 is grounded; the voltage output by the power supply main circuit module (2) is applied between the anode and the cathode of the electrolytic cell and the ground as external excitation, and the earth current of the constructed test loop is detected to obtain the earth leakage current of the electrolytic cell main loop.
19. A control method for the hydrogen production power supply apparatus as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
initializing and performing system self-checking when the hydrogen production power supply device is started;
judging whether insulation detection is carried out after the system self-checking is finished;
controlling the control method according to claim 17 or 18 to perform insulation detection if insulation detection is required;
waiting for interrupt triggering conditions, wherein an interrupt triggering condition is set for each electrolytic cell detection type, and the electrolytic cell detection type comprises any one of electrolytic cell pressure detection, electrolytic cell impedance detection, electrolytic cell voltage detection and electrolytic cell gas concentration;
when an interrupt trigger condition is received, detection of the interrupt trigger condition is performed according to the control method of any one of claims 12 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310682472.9A CN116791121A (en) | 2023-06-09 | 2023-06-09 | Hydrogen production power supply device with electrolytic tank detection function, system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310682472.9A CN116791121A (en) | 2023-06-09 | 2023-06-09 | Hydrogen production power supply device with electrolytic tank detection function, system and control method |
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| Publication Number | Publication Date |
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| CN116791121A true CN116791121A (en) | 2023-09-22 |
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| CN202310682472.9A Pending CN116791121A (en) | 2023-06-09 | 2023-06-09 | Hydrogen production power supply device with electrolytic tank detection function, system and control method |
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| Country | Link |
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| CN (1) | CN116791121A (en) |
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