Direct-current hydrogen production power supply and power module thereof
Through the modular design, the hardware circuit and control system of the DC hydrogen production power supply are integrated, which solves the problem of poor expansion of the DC hydrogen production power supply in the existing technology, and achieves flexible capacity expansion and efficient adaptability.
Patent Information
- Application Number
- CN202411862470.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-04-29
AI Technical Summary
When expanding capacity, existing DC hydrogen production power supplies need to add control systems, resulting in poor scalability.
The modular design adopts the power module's hardware circuit and its control system are integrated together, and the electronic components and control system are connected through a stacked busbar to achieve flexible capacity expansion.
There is no need to add a control system to the new module, which realizes flexible expansion of the DC hydrogen production power supply and improves scalability and adaptability.
Smart Images
Figure CN119906235A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of electrolytic hydrogen production, and in particular relates to a direct current hydrogen production power supply and a power module thereof. Background Art
[0002] As an important carrier for energy users to achieve green and low-carbon transformation, hydrogen energy is gradually becoming an important part of the future national energy system. In the field of water electrolysis hydrogen production, the commonly used hydrogen production power supply currently uses thyristor rectification technology, which has mature technology, high efficiency and large capacity, but has problems such as large harmonics on the grid side and low power factor, and is only suitable for rectification application scenarios.
[0003] Figure 1 The figure shows a scheme of direct current hydrogen production using a thyristor multi-pulse rectifier power supply in the prior art, including a three-winding transformer and a twelve-pulse rectifier formed by combining two six-pulse rectifiers. Since the thyristor multi-pulse rectifier power supply has problems such as large harmonics and low power factor on the grid side, in order to ensure the power quality on the grid side, an AC filter for filtering and a parallel capacitor or static var generator (SVG) for reactive power compensation are added on the grid side. However, in the above scheme, the twelve-pulse rectifier is composed of two six-pulse rectifiers. When expanding the power supply capacity, it is not only necessary to add a six-pulse rectifier body, but also necessary to add a control system of the newly added six-pulse rectifier to the control device, which is not convenient for expansion. Summary of the invention
[0004] The object of the present invention is to provide a direct current hydrogen production power supply and a power module thereof, so as to solve the technical problem of poor expansibility of direct current hydrogen production power supplies in the prior art.
[0005] In order to solve the above technical problems, the present invention provides a technical solution of a DC hydrogen production power module: a DC hydrogen production power module, including a power unit for realizing voltage conversion and its control system, the electronic components of the power unit are connected together through a laminated busbar, and the control system is fixed on the laminated busbar.
[0006] The beneficial effect of the above technical solution is that the technical solution of a DC hydrogen production power module of the present invention belongs to an improved invention. The present invention adopts a modular design, integrates the hardware circuit of the power module and its control system, and can flexibly expand the hydrogen production power capacity according to the specific environment of DC hydrogen production. When expanding, there is no need to add a control system for the newly added module. The present invention solves the technical problem of poor scalability of DC hydrogen production power in the prior art.
[0007] Furthermore, the power module further comprises a heat sink, and the power devices in the power unit are arranged on the surface of the heat sink.
[0008] Furthermore, the power module further comprises a fan, the fan comprises an air inlet and an air outlet, and the fan is arranged below the radiator so as to provide ventilation for the radiator through an air duct formed by the air inlet and the air outlet.
[0009] Furthermore, the capacitors in the power unit are arranged and fixed on one side of the radiator, and the arrangement direction of the capacitors is consistent with the air duct direction of the fan.
[0010] Furthermore, the power unit includes a capacitor and two power devices, the two power devices are connected in series and then in parallel at both ends of the capacitor; the two ends of the capacitor constitute the input ends of the power unit, and the two ends of one of the power devices constitute the output ends of the power unit.
[0011] Furthermore, the power device is an IGBT.
[0012] The present invention also provides a technical solution for a DC hydrogen production power supply: a DC hydrogen production power supply, comprising a power module, wherein the power module comprises a power unit for realizing voltage conversion and a control system thereof, wherein the electronic components of the power unit are connected together through a laminated busbar, and the control system is fixed on the laminated busbar.
[0013] The beneficial effect of the above technical solution is that the technical solution of a DC hydrogen production power supply of the present invention belongs to an improved invention. The present invention adopts a modular design, integrates the hardware circuit of the power module and its control system, and can flexibly expand the capacity of the hydrogen production power supply according to the specific environment of DC hydrogen production. When expanding, there is no need to add a control system for the newly added module. The present invention solves the technical problem of poor scalability of DC hydrogen production power supplies in the prior art.
[0014] Furthermore, the power module further comprises a heat sink, and the power devices in the power unit are arranged on the surface of the heat sink.
[0015] Furthermore, there are at least two power modules, and the power modules are connected in parallel.
[0016] Furthermore, the power unit includes a capacitor and two power devices, the two power devices are connected in series and then in parallel at both ends of the capacitor; the two ends of the capacitor constitute the input ends of the power unit, and the two ends of one of the power devices constitute the output ends of the power unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of a thyristor multi-pulse rectifier power supply in the prior art; Figure 2 The electrical schematic diagram of the power module in the embodiment of the DC hydrogen production power module of the present invention; Figure 3 It is a schematic diagram of the structure of the power module in the embodiment of the DC hydrogen production power module of the present invention.
[0018] Among them, 1. control system; 2. heat sink; 31. air inlet; 32. air outlet; 4. laminated busbar; 51. first IGBT; 52. second IGBT; 61. first capacitor; 62. second capacitor; 63. third capacitor; 64. fourth capacitor. DETAILED DESCRIPTION
[0019] The present invention adopts modular design, integrates the hardware circuit of the power module and its control system, and can flexibly expand the capacity of the hydrogen production power supply according to the specific environment of direct current hydrogen production. When expanding, there is no need to add a control system for the newly added module. The present invention solves the technical problem of poor scalability of direct current hydrogen production power supply in the prior art.
[0020] DC hydrogen production power supply power module embodiment: The electrical schematic diagram of a DC hydrogen production power module is as follows: Figure 2 As shown, the input side (i.e., DCH+ and DCH- side) includes four DC bus capacitors connected in parallel, i.e., the first capacitor 61, the second capacitor 62, the third capacitor 63 and the fourth capacitor 64. Two IGBTs (i.e., the first IGBT and the second IGBT) are connected in series and then in parallel at both ends of the capacitors to form a DC step-down chopper circuit. The voltage output at both ends of one of the IGBTs constitutes the output side of the power module (i.e., the DCL+ and DCL- side). The control system 1 collects electrical parameters such as voltage and current on the input and output sides of the power module, and after calculation by the control algorithm built into the control system 1, outputs the drive pulses that control the two IGBTs.
[0021] The control algorithm in the control system 1 can adopt various control algorithms in the prior art, such as double closed-loop control of voltage outer loop and current inner loop.
[0022] The structural diagram of the power module in this embodiment is as follows Figure 3 As shown, four DC bus capacitors, namely the first capacitor 61, the second capacitor 62, the third capacitor 63 and the fourth capacitor 64, are electrically connected to two IGBTs, namely the first IGBT and the second IGBT, through the laminated busbar 4 to form a whole, so as to form Figure 2 The control system 1 is installed above the laminated busbar 4.
[0023] The power module of this embodiment further includes a heat sink 2 and a fan 3. Two IGBTs are attached to the upper end surface of the heat sink 2. The fan 2 is located at the bottom of the power module (i.e., below the heat sink 2). The heat sink is ventilated through an air duct formed by an air inlet 31 and an air outlet 32.
[0024] In this embodiment, the first capacitor 61 , the second capacitor 62 , the third capacitor 63 and the fourth capacitor 64 in the capacitor group are installed in a row on one side of the first IGBT and the second IGBT, and the capacitor arrangement direction is consistent with the air duct direction of the fan 2 .
[0025] In this embodiment, air cooling is used to dissipate heat for the IGBT. In other implementations, other methods in the prior art, such as water cooling, etc., may also be used. The corresponding installation method may refer to the prior art.
[0026] In this embodiment, the circuit structure of the power module is a DC step-down chopper circuit. In other implementations, it can be other types of DC conversion circuits. The present invention does not limit the specific topology of the circuit structure.
[0027] DC hydrogen production power supply embodiment: A direct current hydrogen production power supply includes at least two power modules connected in parallel. The specific power modules are the same as those described in the above direct current hydrogen production power supply power embodiment and will not be described again here.
[0028] The present invention has the following characteristics The present invention integrates the DC bus capacitor, IGBT devices, radiator, fan, laminated busbar and control system as a whole to achieve modular and standardized design, facilitate capacity expansion, and flexibly adapt to the application environment of distributed hydrogen production.
[0029] The DC hydrogen production power supply power module provided by the present invention has a complete electrical and heat dissipation design, and has technical advantages such as compact structure and strong scalability, thereby improving the adaptability of the hydrogen production power supply in the DC microgrid scenario.
[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A DC hydrogen production power module, comprising a power unit for realizing voltage conversion and a control system thereof, characterized in that: The electronic components of the power unit are connected together through a laminated busbar, and the control system is fixed on the laminated busbar.
2. The DC hydrogen production power module according to claim 1, characterized in that: The power module further comprises a heat sink, and the power devices in the power unit are arranged on the surface of the heat sink.
3. The DC hydrogen production power module according to claim 2, characterized in that: The power module further includes a fan, which includes an air inlet and an air outlet. The fan is arranged below the radiator to provide ventilation for the radiator through an air duct formed by the air inlet and the air outlet.
4. The DC hydrogen production power module according to claim 3, characterized in that: The capacitors in the power unit are arranged and fixed on one side of the radiator, and the arrangement direction of the capacitors is consistent with the direction of the air duct of the fan.
5. The DC hydrogen production power module according to claim 1, characterized in that: The power unit includes a capacitor and two power devices, which are connected in series and in parallel at both ends of the capacitor; the two ends of the capacitor constitute the input ends of the power unit, and the two ends of one of the power devices constitute the output ends of the power unit.
6. The DC hydrogen production power module according to claim 2 or 5, characterized in that: The power device is an IGBT.
7. A DC hydrogen production power supply, comprising a power module, wherein the power module comprises a power unit for realizing voltage conversion and a control system thereof, characterized in that: The electronic components of the power unit are connected together through a laminated busbar, and the control system is fixed on the laminated busbar.
8. The DC hydrogen production power supply according to claim 7, characterized in that: The power module further comprises a heat sink, and the power devices in the power unit are arranged on the surface of the heat sink.
9. The DC hydrogen production power supply according to claim 7, characterized in that: There are at least two power modules, and the power modules are connected in parallel.
10. The DC hydrogen production power supply according to any one of claims 7 to 9, characterized in that: The power unit includes a capacitor and two power devices, which are connected in series and in parallel at both ends of the capacitor; the two ends of the capacitor constitute the input ends of the power unit, and the two ends of one of the power devices constitute the output ends of the power unit.