CN219918434U - Hydrogen production power supply device - Google Patents
Hydrogen production power supply device Download PDFInfo
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- CN219918434U CN219918434U CN202321369907.6U CN202321369907U CN219918434U CN 219918434 U CN219918434 U CN 219918434U CN 202321369907 U CN202321369907 U CN 202321369907U CN 219918434 U CN219918434 U CN 219918434U
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- power supply
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- hydrogen production
- supply device
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 56
- 239000001257 hydrogen Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000002955 isolation Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model discloses a hydrogen production power supply device, which comprises a controller, a main circuit and an impedance detection unit, wherein the main circuit comprises an AC/DC unit and a DC/DC unit, the input end of the AC/DC unit is connected with a power grid, the output end of the AC/DC unit is connected with the input end of the DC/DC unit, and the output end of the DC/DC unit is connected with an electrolytic tank; the impedance detection unit comprises a high-frequency alternating current power supply, a voltage detection piece and a current detection piece; the output end of the high-frequency alternating current power supply is connected with the output end of the DC/DC unit, the voltage detection part is positioned at the output end of the DC/DC unit, the current detection part is positioned at the output end of the DC/DC unit, and the high-frequency alternating current power supply, the voltage detection part and the current detection part are all connected with the controller. The utility model has the advantages of simple structure, low cost, good real-time performance and the like.
Description
Technical Field
The utility model mainly relates to the technical field of hydrogen production, in particular to a hydrogen production power supply device.
Background
The hydrogen production power supply device is equipment for converting electric energy into chemical energy and is widely applied to the fields of hydrogen generation and hydrogen preparation. In the existing hydrogen production system, a hydrogen production power supply device is taken as an important link, and the key function of the hydrogen production power supply device is to acquire electric energy from an alternating current power grid and supply power to an electrolytic tank through a power electronic conversion device. The constitution of the hydrogen production power supply device is shown in fig. 1.
As shown in fig. 2, the current mainstream hydrogen production power supply device works in a manner that a hydrogen production station management system (hereinafter referred to as a management system) provides a current instruction for the hydrogen production power supply device according to the state of an electrolytic cell, and the hydrogen production power supply device receives the current instruction of the management system to passively execute the current instruction. The current hydrogen production power supply device is connected with the electrolytic tank only to provide a direct current power supply, and is not connected with the electrolytic tank for more secondary signals, the instructions of throwing and withdrawing the hydrogen production power supply and providing current are obtained from a management system of a hydrogen production station, and the hydrogen production power supply device is used as a power supply device and has the function of providing direct current energy only.
The scheme is completely dependent on the instruction reliability of the management system, the hydrogen production power supply device cannot actively discover the life state (whether faults such as short circuit and the like occur) of the electrolytic tank, only can passively receive the instruction output current, cannot actively judge the state of the electrolytic tank, and cannot actively and timely realize fault protection. In addition, since the electrolytic cell changes its impedance with time due to the use time, if the shutdown inspection is adopted, it is inconvenient to repair and the repair cost is increased.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: aiming at the technical problems existing in the prior art, the utility model provides the hydrogen production power supply device with good real-time performance.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the hydrogen production power supply device comprises a controller, a main circuit and an impedance detection unit, wherein the main circuit comprises an AC/DC unit and a DC/DC unit, the input end of the AC/DC unit is connected with a power grid, the output end of the AC/DC unit is connected with the input end of the DC/DC unit, and the output end of the DC/DC unit is connected with the electrolytic tank; the impedance detection unit comprises a high-frequency alternating current power supply, a voltage detection piece and a current detection piece; the output end of the high-frequency alternating current power supply is connected with the output end of the DC/DC unit and is used for inputting a high-frequency alternating current signal to the output end of the DC/DC unit; the voltage detection piece is positioned at the output end of the DC/DC unit and is used for detecting a voltage signal of the output end of the DC/DC unit; the current detection piece is positioned at the output end of the DC/DC unit and is used for detecting a current signal of the output end of the DC/DC unit; the high-frequency alternating current power supply, the voltage detection piece and the current detection piece are all connected with the controller.
As a further improvement of the above technical scheme:
the power supply is characterized by further comprising an auxiliary loop, wherein the auxiliary loop comprises an isolation step-up transformer and a rectifying unit, the input end of the isolation step-up transformer is connected with an alternating current power supply, the output end of the isolation step-up transformer is connected with the input end of the rectifying unit, and the output end of the rectifying unit is connected with the output end of the AC/DC unit.
A pre-charging unit is arranged between the alternating current power supply and the input end of the isolation step-up transformer.
The AC/DC unit is a three-level rectifying circuit.
The DC/DC unit is a two-level chopper circuit.
An alternating current breaker is arranged between the input end of the AC/DC unit and the power grid, and the alternating current breaker is connected with the controller.
And a three-phase alternating current reactor and a three-phase alternating current filter capacitor are arranged between the alternating current circuit breaker and the input end of the AC/DC unit.
And a direct current isolating switch is arranged between the output end of the DC/DC unit and the electrolytic tank, and the direct current isolating switch is connected with the controller.
A chopper reactor is arranged between the output end of the DC/DC unit and the direct current isolating switch.
And a current sensor is arranged between the output end of the AC/DC unit and the input end of the DC/DC unit.
Compared with the prior art, the utility model has the advantages that:
the hydrogen production power supply device has the self-charging cell impedance detection function, can timely detect the impedance of the electrolytic cell, and can prevent the expansion of faults caused by untimely overhaul of the electrolytic cell; compared with the long-time fault protection condition that the hydrogen production power supply device is sent out a power supply cutting instruction after the state of the electrolytic tank is acquired, analyzed and judged through the hydrogen production station management system, the hydrogen production power supply device can cut off energy sources in time and actively remind the hydrogen production station management system of overhauling the electrolytic tank in time.
The hydrogen production power supply device disclosed by the utility model utilizes the existing hardware (a controller, a voltage sensor, a current sensor and the like) at present, and can realize the function increase of the hydrogen production power supply device without adding new hardware, so that the impedance of the electrolytic tank is detected in real time, and the equipment investment cost and the subsequent maintenance cost are greatly reduced.
Drawings
Fig. 1 is a topological structure diagram of a hydrogen-producing power supply system in the prior art.
FIG. 2 is a topological structure diagram of a hydrogen generation power supply, an electrolytic cell and a management system in the prior art.
Fig. 3 is a topological structure diagram of an embodiment of a hydrogen-producing power supply device of the present utility model.
Fig. 4 is a schematic circuit diagram of an embodiment of a hydrogen-producing power supply apparatus of the present utility model.
Legend description: 1. a main circuit; 11. an AC/DC unit; 12. a DC/DC unit; 2. an electrolytic cell; 3. an impedance detection unit; 31. a high frequency ac power supply; 32. a voltage detecting member; 33. a current detecting member; 4. an auxiliary circuit; 41. a precharge unit; 42. an isolation step-up transformer; 43. a rectifying unit; 5. and a controller.
Detailed Description
The utility model is further described below with reference to the drawings and specific examples.
As shown in fig. 3-4, the hydrogen production power supply device of the embodiment of the utility model comprises a controller 5, a main circuit 1 and an impedance detection unit 3, wherein the main circuit 1 comprises an AC/DC unit 11 and a DC/DC unit 12, the input end of the AC/DC unit 11 is connected with a power grid, the output end of the AC/DC unit 11 is connected with the input end of the DC/DC unit 12, and the output end of the DC/DC unit 12 is connected with an electrolytic tank 2; the impedance detecting unit 3 includes a high-frequency alternating-current power supply 31, a voltage detecting element 32, and a current detecting element 33; the output end of the high-frequency alternating current power supply 31 is connected with the output end of the DC/DC unit 12 and is used for inputting a high-frequency alternating current signal to the output end of the DC/DC unit 12; the voltage detecting element 32 is located at the output end of the DC/DC unit 12 and is used for detecting a voltage signal at the output end of the DC/DC unit 12; the current detecting element 33 is located at the output end of the DC/DC unit 12, and is used for detecting a current signal at the output end of the DC/DC unit 12; wherein the high frequency ac power source 31, the voltage detecting member 32 and the current detecting member 33 are all connected to the controller 5.
Specifically, the AC/DC unit 11 rectifies an AC power supply into a DC power supply using three-level PWM rectification circuits UV1 to UV 3; wherein the DC/DC unit 12 adopts two-level BUCK chopper circuits CH1-CH3; by adopting the combination mode of the AC/DC unit 11 and the DC/DC unit 12, the voltage is smoothly output between DC0 and 850V. An alternating current breaker QF1, an alternating current filter capacitor C1 and a three-phase alternating current reactor L11 are sequentially arranged between the power grid and the input end of the AC/DC unit 11; wherein, a chopper reactor L1-L3 and a isolating switch QS1 are arranged between the output end of the DC/DC unit 12 and the electrolytic tank 2 in sequence. The current detection element 33 is a current sensor BC and is connected in series to a loop between the isolating switch QS1 and the electrolytic tank 2; the voltage detecting element 32 is a voltage sensor BV and is connected in parallel to the input end of the electrolytic tank 2. Wherein the high frequency ac power source 31 is located within the controller 5. Further, the input of the AC/DC unit 11 is provided with current sensors BC11-BC16 and an intermediate DC circuit is provided with a current sensor BC1 for detecting and monitoring the current everywhere.
In a specific embodiment, for the LCL filter of the main circuit 1, the ac filter capacitor C1 needs to be charged during switching on, and this time, the intermediate dc loop needs to be charged, then the four-quadrant inversion is started to charge the ac filter capacitor C1, and finally the ac breaker QF1 is switched on again. An auxiliary circuit 4 is disposed on the intermediate DC circuit, and the auxiliary circuit 4 includes an isolation step-up transformer 42 and a rectifying unit 43, wherein an input terminal of the isolation step-up transformer 42 is connected to an AC power source, an output terminal of the isolation step-up transformer 42 is connected to an input terminal of the rectifying unit 43, and an output terminal of the rectifying unit 43 is connected to an output terminal (intermediate DC circuit) of the AC/DC unit 11. Specifically, auxiliary power supply AC380V supplies power to auxiliary circuit 4, through switch QMy of precharge unit 41, precharge contactor KMy, and precharge resistors (RY 1-RY 3), through isolation step-up transformer TM1 (AC 380V/AC 590V), and through rectifying unit 43 (composed of diode assemblies U1 and U2) to rectify AC590V to an intermediate direct voltage DC830V.
In specific application, the hydrogen production power supply device provides direct current power for the electrolytic tank 2, and superimposes high-frequency alternating current signals on the output direct current voltage U through the high-frequency alternating current power supply 31, then acquires voltage signals U and current signals I of the output end of the DC/DC unit 12 through the voltage detection part 32 and the current detection part 33, and calculates the impedance R of the electrolytic tank 2 in real time according to the voltage signals and the current signals (for example, R=U/I-R Positive direction -R Negative pole Wherein R is Positive direction And R is Negative pole The impedance of the positive electrode copper bar (cable) and the negative electrode copper bar (cable) are respectively input from the output end of the DC/DC unit 12 to the electrolytic tank 2, and the state of the electrolytic tank 2 is timely judged; if the situation is slightly abnormal, the direct-current isolating switch QS1 can be disconnected in time, a fault is reported to the hydrogen station management system, an maintainer is required to check the electrolytic tank 2 in time at the moment, and after the electrolytic tank 2 is checked and recovered, the direct-current isolating switch QS1 can be switched on again in a long-distance mode to continue to supply power; if the fault is further worsened, the direct-current isolating switch QS1 and the alternating-current breaker QF1 can be disconnected, the hydrogen production power supply device and an external power grid are disconnected, the fault expansion of the electrolytic tank 2 is prevented, and the hydrogen production station management system is timely reported to remind the electrolytic tank 2 of overhauling.
The hydrogen production power supply device has the advantages that the impedance detection function of the electrolytic tank 2 can be realized, the impedance of the electrolytic tank 2 can be detected in time, and the expansion of faults caused by the fact that the electrolytic tank 2 is not overhauled in time is prevented; compared with the long-time fault protection condition that the state of the electrolytic tank 2 is acquired through the hydrogen production station management system, and after analysis and judgment, a power-off instruction is sent to the hydrogen production power supply device, the hydrogen production power supply device can timely cut off energy sources and actively remind the hydrogen production station management system of timely overhauling the electrolytic tank 2.
The hydrogen production power supply device can realize the function increase of the hydrogen production power supply device without adding new hardware on the basis of utilizing the existing hardware (the controller 5, the voltage sensor, the current sensor and the like), and the impedance of the electrolytic tank 2 is detected in real time, so that the equipment investment cost and the subsequent maintenance cost are greatly reduced.
The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be within the scope of the utility model as set forth in the following claims.
Claims (10)
1. The hydrogen production power supply device is characterized by comprising a controller (5), a main circuit (1) and an impedance detection unit (3), wherein the main circuit (1) comprises an AC/DC unit (11) and a DC/DC unit (12), the input end of the AC/DC unit (11) is connected with a power grid, the output end of the AC/DC unit (11) is connected with the input end of the DC/DC unit (12), and the output end of the DC/DC unit (12) is connected with an electrolytic tank (2); the impedance detection unit (3) comprises a high-frequency alternating current power supply (31), a voltage detection piece (32) and a current detection piece (33); the output end of the high-frequency alternating current power supply (31) is connected with the output end of the DC/DC unit (12) and is used for inputting a high-frequency alternating current signal to the output end of the DC/DC unit (12); the voltage detection piece (32) is positioned at the output end of the DC/DC unit (12) and is used for detecting a voltage signal of the output end of the DC/DC unit (12); the current detection piece (33) is positioned at the output end of the DC/DC unit (12) and is used for detecting a current signal of the output end of the DC/DC unit (12); the high-frequency alternating current power supply (31), the voltage detection piece (32) and the current detection piece (33) are connected with the controller (5).
2. The hydrogen production power supply device according to claim 1, further comprising an auxiliary circuit (4), the auxiliary circuit (4) comprising an isolation step-up transformer (42) and a rectifying unit (43), an input of the isolation step-up transformer (42) being connected to an AC power supply, an output of the isolation step-up transformer (42) being connected to an input of the rectifying unit (43), an output of the rectifying unit (43) being connected to an output of the AC/DC unit (11).
3. Hydrogen production power supply device according to claim 2, characterized in that a pre-charging unit (41) is arranged between the ac power supply and the input of the isolating step-up transformer (42).
4. A hydrogen-producing power supply apparatus according to claim 1, 2 or 3, wherein the AC/DC unit (11) is a three-level rectifying circuit.
5. A hydrogen production power supply apparatus according to claim 1, 2 or 3, wherein the DC/DC unit (12) is a two-level chopper circuit.
6. A hydrogen production power supply device according to claim 1, 2 or 3, characterized in that an AC circuit breaker is arranged between the input of the AC/DC unit (11) and the grid, said AC circuit breaker being connected to the controller (5).
7. The hydrogen-producing power supply device according to claim 6, wherein a three-phase AC reactor and a three-phase AC filter capacitor are provided between the AC circuit breaker and the input terminal of the AC/DC unit (11).
8. A hydrogen production power supply device according to claim 1, 2 or 3, characterized in that a direct current isolating switch is arranged between the output end of the DC/DC unit (12) and the electrolytic tank (2), and the direct current isolating switch is connected with the controller (5).
9. Hydrogen production power supply device according to claim 8, characterized in that a chopper reactor is arranged between the output of the DC/DC unit (12) and the direct current isolating switch.
10. A hydrogen production power supply device according to claim 1, 2 or 3, characterized in that a current sensor is provided between the output of the AC/DC unit (11) and the input of the DC/DC unit (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321369907.6U CN219918434U (en) | 2023-05-31 | 2023-05-31 | Hydrogen production power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321369907.6U CN219918434U (en) | 2023-05-31 | 2023-05-31 | Hydrogen production power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219918434U true CN219918434U (en) | 2023-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321369907.6U Active CN219918434U (en) | 2023-05-31 | 2023-05-31 | Hydrogen production power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219918434U (en) |
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2023
- 2023-05-31 CN CN202321369907.6U patent/CN219918434U/en active Active
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