Open sea floating type wind-solar off-grid hydrogen production system

Abstract

The invention provides an open-sea floating type wind-solar off-grid hydrogen production system, and belongs to the technical field of open-sea wind power photovoltaic hydrogen production, and the system comprises a control unit which is used for obtaining a wind-solar power generation control instruction and a first hydrogen production instruction based on wind-solar power generation parameters and power utilization parameters of a hydrogen production unit, receiving electric energy transmitted by a wind-solar power generation platform, and sending the electric energy to a wind-solar power generation platform; the wind and light power generation platform is in communication connection with the control unit and used for obtaining wind and light power generation parameters, sending the wind and light power generation parameters to the control unit and receiving a wind and light power generation control instruction for wind and light power generation, and the hydrogen production unit is in communication connection with the control unit, electrically connected with the wind and light power generation platform and used for obtaining power utilization parameters of the hydrogen production unit. And the power utilization parameter of the hydrogen production unit is sent to the control unit, the first hydrogen production instruction is received, and the electric energy transmitted by the wind-solar power generation platform is received based on the first hydrogen production instruction to carry out hydrogen production operation. The technical problem that hydrogen cannot be stably prepared in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power and photovoltaic hydrogen production, and in particular to an offshore floating wind-solar off-grid hydrogen production system. Background Art

[0002] As the global demand for clean energy continues to grow, hydrogen energy, as a clean and efficient secondary energy source, is an important path to achieve the transformation of high-energy consumption and high-emission areas to green and low-carbon; wind power generation is highly random, which brings severe challenges to the power grid's absorption; restricted by the high price of grid electricity, hydrogen is mainly produced from fossil energy, which is contrary to the original intention of green and low-carbon. If the two are effectively combined, they can be fully absorbed through electrolyzers that can withstand wide power fluctuations. Offshore wind power has become a new focus in the field of energy production. The utilization of offshore wind power resources has tended to be saturated. Going to the deep sea is the general trend of offshore wind power development. The pace of offshore wind power development is moving towards the deep sea with richer resources. As an important direction for the development of deep-sea wind power, floating wind and photovoltaic platforms, producing hydrogen through floating wind and photovoltaic platforms is also an important way to obtain clean energy in the future.

[0003] However, wind power generation and photovoltaic power generation are random, intermittent and volatile. Some existing green electricity hydrogen production mostly adopts the scheme of grid-connected centralized hydrogen production. The efficiency of grid-connected hydrogen production is low and it is not suitable for use in the deep sea environment where floating wind turbines work. At the same time, the off-grid production of hydrogen in the deep sea has high requirements for system safety, stability and economy. Therefore, how to stably, safely and efficiently produce hydrogen in an off-grid form in the deep sea environment where floating wind turbines work is a problem that needs to be solved urgently. There is a technical problem in the existing technology that hydrogen cannot be produced stably. Summary of the invention

[0004] In view of this, it is necessary to provide a offshore floating wind-solar off-grid hydrogen production system to solve the technical problem that the existing technology cannot produce hydrogen stably, safely and efficiently.

[0005] In order to solve the above technical problems, the present invention provides a remote offshore floating wind-solar off-grid hydrogen production system, comprising: A control unit is used to receive wind-solar power generation parameters and power consumption parameters of the hydrogen production unit, obtain wind-solar power generation control instructions and a first hydrogen production instruction based on the wind-solar power generation parameters and the power consumption parameters of the hydrogen production unit, and receive electric energy transmitted by the wind-solar power generation platform; the wind-solar power generation parameters are: wind turbine output voltage, wind turbine output current, photovoltaic output voltage and photovoltaic output current; the power consumption parameters of the hydrogen production unit are: working current, working voltage and working power of the hydrogen production unit; The wind-solar power generation platform is connected to the control unit in communication, and is used to obtain wind-solar power generation parameters, send the wind-solar power generation parameters to the control unit, and receive wind-solar power generation control instructions to perform wind-solar power generation; The hydrogen production unit is communicatively connected to the control unit and electrically connected to the wind and solar power generation platform, and is used to obtain the power consumption parameters of the hydrogen production unit, and send the power consumption parameters of the hydrogen production unit to the control unit, receive a first hydrogen production instruction, and receive the electric energy transmitted by the wind and solar power generation platform based on the first hydrogen production instruction to perform hydrogen production operations.

[0006] In a possible implementation, the system includes: The energy storage unit is communicatively connected with the control unit and electrically connected with the wind and solar power generation platform, and is used to obtain the electric energy reserve parameters of the energy storage unit, and send the electric energy reserve parameters of the energy storage unit to the control unit, receive the energy storage instruction, and store the excess electric energy provided by the wind and solar power generation platform based on the energy storage instruction; the electric energy reserve parameters of the energy storage unit are: the electric quantity, voltage and charge state of the energy storage unit; The control unit is used to receive the electric energy reserve parameter of the energy storage unit and generate an energy storage instruction based on the electric energy reserve parameter of the energy storage unit.

[0007] In a possible implementation, the system further includes: The hydrogen storage unit is communicatively connected to the control unit, electrically connected to the wind and solar power generation platform, and connected to the hydrogen production unit, and is used to obtain a first hydrogen storage instruction sent by the control unit, receive the electric energy transmitted by the wind and solar power generation platform based on the first hydrogen storage instruction, and receive and store the hydrogen produced by the hydrogen production unit.

[0008] In a possible implementation, the system further includes: A control unit, used to obtain a power supply control instruction of the energy storage unit and a second hydrogen production instruction based on wind and solar power generation parameters and power consumption parameters of the hydrogen production unit, and to receive electric energy transmitted by the energy storage unit; The energy storage unit is used to receive a power supply control instruction of the energy storage unit and perform a power supply operation based on the power supply control instruction of the energy storage unit; The hydrogen production unit is electrically connected to the energy storage unit, and is used to receive a second hydrogen production instruction, and receive electric energy transmitted by the energy storage unit based on the second hydrogen production instruction to perform hydrogen production operations.

[0009] In one possible implementation, the hydrogen storage unit is electrically connected to the energy storage unit, and is also used to obtain a second hydrogen storage instruction sent by the control unit, receive electrical energy sent by the energy storage unit based on the second hydrogen storage instruction, and receive and store hydrogen produced by the hydrogen production unit.

[0010] In a possible implementation, the system further includes: The inverter distribution unit is electrically connected to the wind-solar power generation platform and is used to convert the direct current power obtained by the wind-solar power generation platform into the first alternating current.

[0011] In one possible implementation, The inverter distribution unit is electrically connected to the energy storage unit and is used to convert the direct current stored in the energy storage unit into a second alternating current.

[0012] In a possible implementation, the inverter distribution unit is electrically connected to the control unit, and is used to transmit the first alternating current or the second alternating current to the control unit.

[0013] In a possible implementation, the inverter distribution unit is electrically connected to the hydrogen production unit, and is used to transmit the first alternating current or the second alternating current to the hydrogen production unit.

[0014] In a possible implementation, the inverter distribution unit is electrically connected to the hydrogen storage unit, and is used to transmit the first alternating current or the second alternating current to the hydrogen storage unit.

[0015] The beneficial effects of the present invention are as follows: the offshore floating wind-solar off-grid hydrogen production system provided by the present invention includes: a control unit, used to receive wind-solar power generation parameters and power consumption parameters of the hydrogen production unit, obtain wind-solar power generation control instructions and a first hydrogen production instruction based on the wind-solar power generation parameters and the power consumption parameters of the hydrogen production unit, and receive the electric energy transmitted by the wind-solar power generation platform; the wind-solar power generation parameters are: wind turbine output voltage, wind turbine output current, photovoltaic output voltage and photovoltaic output current; the power consumption parameters of the hydrogen production unit are: working current, working voltage and working power of the hydrogen production unit; the wind-solar power generation platform is communicatively connected to the control unit, used to obtain wind-solar power generation parameters, and send the wind-solar power generation parameters to the control unit, and accept wind-solar power generation control instructions to perform wind-solar power generation; the hydrogen production unit is communicatively connected to the control unit and electrically connected to the wind-solar power generation platform, used to obtain the power consumption parameters of the hydrogen production unit, and send the power consumption parameters of the hydrogen production unit to the control unit, receive the first hydrogen production instruction, and receive the electric energy transmitted by the wind-solar power generation platform based on the first hydrogen production instruction to perform hydrogen production operations. The present invention obtains wind-solar power generation control instructions and hydrogen production instructions based on wind-solar power generation data, power consumption data of the control unit and power consumption data of the hydrogen production unit through a control unit. The control unit is mainly used to control the wind-solar power generation platform to perform wind-solar power generation, thereby providing a stable power source for the hydrogen production unit and the control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of an embodiment of a remote offshore floating wind-solar off-grid hydrogen production system provided by the present invention; Figure 2A system topology diagram of an embodiment of a remote offshore floating wind-solar off-grid hydrogen production system provided by the present invention; Figure 3 A topological diagram of the auxiliary electrolysis module of an embodiment of the offshore floating wind-solar off-grid hydrogen production system provided by the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more than two.

[0020] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0021] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present invention provides a remote offshore floating wind-solar off-grid hydrogen production system, which is described below.

[0024] Figure 1 A schematic diagram of an embodiment of the offshore floating wind-solar off-grid hydrogen production system provided by the present invention and Figure 2 The system topology diagram of an embodiment of the offshore floating wind-solar off-grid hydrogen production system provided by the present invention includes: The control unit 101 is used to receive wind-solar power generation parameters and power consumption parameters of the hydrogen production unit 103, obtain wind-solar power generation control instructions and a first hydrogen production instruction based on the wind-solar power generation parameters and the power consumption parameters of the hydrogen production unit 103, and receive electric energy transmitted by the wind-solar power generation platform 102; the wind-solar power generation parameters are: wind turbine output voltage, wind turbine output current, photovoltaic output voltage and photovoltaic output current; the power consumption parameters of the hydrogen production unit 103 are: working current, working voltage and working power of the hydrogen production unit 103; The wind-solar power generation platform 102 is connected to the control unit 101 for communication, and is used to obtain wind-solar power generation parameters, send the wind-solar power generation parameters to the control unit 101, and receive wind-solar power generation control instructions to perform wind-solar power generation; The hydrogen production unit 103 is communicatively connected to the control unit 101 and electrically connected to the wind-solar power generation platform 102, and is used to obtain the power consumption parameters of the hydrogen production unit 103, and send the power consumption parameters of the hydrogen production unit 103 to the control unit 101, receive the first hydrogen production instruction, and receive the electric energy transmitted by the wind-solar power generation platform 102 based on the first hydrogen production instruction to perform hydrogen production operations.

[0025] It is understandable that the wind-solar power generation platform 102 adopts maximum power output control under the current wind speed and radiation intensity environment.

[0026] It can be understood that the present application relates to a far-sea floating wind-solar off-grid hydrogen production system, including a floating wind-solar platform, a hydrogen production unit 103, an energy storage unit, a hydrogen storage unit, a control unit 101 and an inverter distribution unit; the floating wind-solar platform includes a floating wind turbine, a wind turbine rectifier module, a photovoltaic module and a photovoltaic control module; the hydrogen production unit 103 includes an electrolysis DC step-down module, an electrolyzer module, an auxiliary electrolysis module, a gas-liquid separation module and a hydrogen purification module; the auxiliary electrolysis module is used to pre-treat seawater into deionized water and transport it to the electrolyzer module; the energy storage unit includes a converter module and an energy storage module, and the converter module is electrically connected to the energy storage module; the hydrogen storage unit is connected to the hydrogen production unit 103 and the energy storage unit to store hydrogen and provide hydrogen energy for the energy storage unit; the control unit 101 is used to regulate the energy supply mode of the system; the inverter distribution unit inverts DC power into 220 / 380V AC power and provides power for the system AC load. The present invention can realize efficient, stable and safe hydrogen production on a wind-solar integrated offshore floating wind-solar platform.

[0027] It can be further understood that the floating wind-solar platform includes a floating wind turbine, a wind turbine rectifier module, a photovoltaic module and a photovoltaic control module; the wind turbine rectifier module, the photovoltaic module and the photovoltaic control module are all arranged on the floating platform where the floating wind turbine is located; The hydrogen production unit 103 includes an electrolysis DC step-down module, an electrolyzer module, an auxiliary electrolysis module, a gas-liquid separation module and a hydrogen purification module; the auxiliary electrolysis module includes a seawater pump, a mixing tank, a filter, a clean seawater storage tank, a seawater desalination device and a deionization device; the auxiliary electrolysis module is used to extract seawater and pre-treat the seawater into deionized water and transport it to the electrolyzer module; The control unit 101 is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, the hydrogen storage unit and the inverter distribution unit to monitor the power generation of the floating wind-solar platform, the operation of the hydrogen production system and the safety of the hydrogen storage unit, and is used to regulate the energy supply mode of the wind-solar off-grid hydrogen production system.

[0028] It can be further understood that, in the above wind-photovoltaic off-grid hydrogen production system, the floating wind turbine transmits electric energy to the wind turbine rectifier module, and the photovoltaic module transmits electric energy to the photovoltaic control module; the hydrogen production unit 103 includes an electrolysis DC step-down module, an electrolyzer module, an auxiliary electrolysis module, a gas-liquid separation module and a hydrogen purification module; the energy storage unit includes an inverter module and an energy storage module, the inverter module is electrically connected to the wind turbine rectifier module and the electrolysis DC step-down module respectively, the wind turbine rectifier module can transmit electric energy to the bidirectional inverter, the energy storage module is electrically connected to the inverter module, the energy storage module can transmit electric energy to the inverter module and then to the electrolysis DC step-down module, and at the same time, the electric energy transmitted from the wind turbine rectifier module can also be converted by the inverter module and stored in the energy storage module, the electrolysis DC step-down module It is electrically connected to the wind turbine rectifier module and the converter module, and the electrolyzer module is electrically connected to the electrolysis DC step-down module to produce hydrogen through the electric energy from the electrolysis DC step-down module; the DC input end of the inverter distribution unit is electrically connected to the wind turbine rectifier module, the converter module, and the photovoltaic control module, and the AC output end of the inverter distribution unit is electrically connected to the AC load in the hydrogen production unit 103 and the hydrogen storage unit, and the inverter distribution unit can provide electric energy to the system AC load; the control unit 101 is electrically connected to the floating wind and solar platform, the energy storage unit, the hydrogen storage unit, the hydrogen production unit 103, and the inverter distribution unit to monitor the power generation of the floating wind and solar platform, the operation of the hydrogen production unit 103, and the safety of the hydrogen storage unit, and is used to regulate the energy supply mode of the off-grid wind power hydrogen production system.

[0029] It can be further understood that, when the wind is sufficient, the wind turbine can operate at rated power, and the electricity generated by the floating wind turbine generator is passed through the wind turbine rectifier module to provide power for the electrolysis DC step-down module, the bidirectional converter, the control unit 101 and the inverter distribution unit. At this time, the wind turbine rectifier module and the photovoltaic control module supply power to the inverter distribution unit, the auxiliary electrolysis module starts to work, pre-treats the seawater and produces deionized water to be transported to the electrolyzer, and the electrolyzer slowly increases from low load power to rated power. The generated hydrogen is successively stored in the low-pressure hydrogen storage tank through the gas-liquid separation module, the hydrogen purification module, and the compression module. When the pressure of the low-pressure hydrogen storage tank reaches the threshold, the control unit 101 will control the compression module to store hydrogen in the high-pressure hydrogen storage tank until the pressure of the high-pressure hydrogen storage tank reaches the threshold; at the same time, the bidirectional converter adjusts the system microgrid voltage and smoothes the wind power fluctuations, and the lithium battery and supercapacitor absorb electricity as loads; the inverter distribution unit provides power to the auxiliary electrolysis module, the gas-liquid separation module, the hydrogen purification module, the compression module and the pressure reduction module to ensure the normal operation of the system. If the control unit 101 detects an abnormality, the control unit 101 records the abnormal information and location and sends out an alarm signal. After all abnormal conditions are eliminated and the system automatically detects that all items are normal, hydrogen production can be carried out.

[0030] It can be further understood that, when the wind weakens, the control unit 101 detects that the power of the floating wind turbine generator drops below the preset power value and the lithium battery and the supercapacitor are fully charged, the bidirectional converter and the wind turbine rectifier module provide power to the electrolysis DC step-down module, the control unit 101 and the inverter distribution unit, and the photovoltaic module provides power to the inverter distribution unit. At this time, the lithium battery and the supercapacitor are used as power sources; the electrolysis DC step-down module provides power to the electrolyzer, and the electrolyzer can still produce hydrogen at rated power. The auxiliary electrolysis module transports deionized water to the electrolyzer, and the generated hydrogen The hydrogen is first stored in a low-pressure hydrogen storage tank through the gas-liquid separation module, the hydrogen purification module and the compression module. When the pressure of the low-pressure hydrogen storage tank reaches the threshold, the control unit 101 will control the compression module to store hydrogen in the high-pressure hydrogen storage tank until the pressure of the high-pressure hydrogen storage tank reaches the threshold. The inverter distribution unit provides power to the auxiliary electrolysis module, the gas-liquid separation module, the hydrogen purification module, the compression module and the pressure reduction module to ensure the normal operation of the system. If the control unit 101 detects an abnormality, the control unit 101 records the abnormal information and location and sends an alarm signal. After all abnormal conditions are eliminated and the system automatically detects that all items are normal, hydrogen production will be carried out.

[0031] It can be further understood that, when the wind weakens, the control unit 101 detects that the power of the floating wind turbine generator drops below the preset power value and the lithium battery and the supercapacitor are insufficient, the wind turbine rectifier module provides power to the electrolysis DC step-down module, the control unit 101 and the inverter distribution unit, and the photovoltaic control module provides power to the inverter distribution unit; at the same time, the control unit 101 will regulate the pressure reduction module to inject hydrogen fuel from the low-pressure hydrogen storage tank into the hydrogen fuel cell; the control unit 101 will regulate the hydrogen fuel cell as a power source to supplement the system power; the lithium battery and the supercapacitor regulate the DC bus voltage to stabilize; but the control unit 101 will regulate the electrolysis DC step-down unit and the electrolyzer to make the electrolyzer work at the lowest The auxiliary electrolysis module delivers deionized water to the electrolyzer, and the generated hydrogen is first stored in the low-pressure hydrogen storage tank through the gas-liquid separation module, the hydrogen purification module and the compression module. When the pressure of the low-pressure hydrogen storage tank reaches the threshold, the control unit 101 will control the compression module to store hydrogen in the high-pressure hydrogen storage tank until the pressure of the high-pressure hydrogen storage tank reaches the threshold; the inverter distribution unit provides power to the auxiliary electrolysis module, the gas-liquid separation module, the hydrogen purification module, the compression module and the pressure reduction module to ensure the normal operation of the system; if the control unit 101 detects an abnormality, the control unit 101 records the abnormal information and location and sends an alarm signal. After all abnormal conditions are eliminated, the system automatically detects that all items are normal before hydrogen production.

[0032] In some embodiments of the present invention, the system comprises: The energy storage unit is communicatively connected to the control unit 101 and electrically connected to the wind-solar power generation platform 102, and is used to obtain the electric energy reserve parameters of the energy storage unit, and send the electric energy reserve parameters of the energy storage unit to the control unit 101, receive the energy storage instruction, and store the excess electric energy provided by the wind-solar power generation platform 102 based on the energy storage instruction; the electric energy reserve parameters of the energy storage unit are: the electric quantity, voltage and charge state of the energy storage unit; The control unit 101 is used to receive the electric energy reserve parameter of the energy storage unit and generate an energy storage instruction based on the electric energy reserve parameter of the energy storage unit.

[0033] It can be understood that the energy storage unit includes an inverter module and an energy storage module, the inverter module includes a bidirectional inverter and a unidirectional inverter, and the energy storage module includes a hydrogen fuel cell, a battery and a supercapacitor; the inverter module is electrically connected to the fan rectifier module and the DC step-down module respectively, the fan rectifier module transfers electric energy to the inverter module, and the fan rectifier module and the inverter module transfer electric energy to the electrolysis DC step-down module.

[0034] In some embodiments of the present invention, the system further comprises: The hydrogen storage unit is communicatively connected to the control unit 101, electrically connected to the wind and solar power generation platform 102, and connected to the hydrogen production unit 103, and is used to obtain a first hydrogen storage instruction sent by the control unit 101, receive the electric energy transmitted by the wind and solar power generation platform 102 based on the first hydrogen storage instruction, and receive and store the hydrogen produced by the hydrogen production unit 103.

[0035] It can be understood that the hydrogen storage unit includes a gas-liquid separation module, a hydrogen purification module, a compression module, a high-pressure hydrogen storage tank, a pressure reduction module and a low-pressure hydrogen storage tank; the gas-liquid separation module is connected to the electrolyzer through a pipeline; the input end of the hydrogen purification module is connected to the gas-liquid separation module, and the compression module and the pressure reduction module are respectively connected to the hydrogen purification module; the compression module is used to pressurize the hydrogen generated by the electrolyzer and transport it to the high-pressure hydrogen storage tank and the low-pressure hydrogen storage tank for storage; the low-pressure hydrogen storage tank is connected to the hydrogen fuel cell through the pressure reduction module to provide hydrogen for the hydrogen fuel cell.

[0036] In some embodiments of the present invention, the system further comprises: The control unit 101 is used to obtain the energy storage unit power supply control instruction and the second hydrogen production instruction based on the wind and solar power generation parameters and the power consumption parameters of the hydrogen production unit 103, and receive the electric energy transmitted by the energy storage unit; The energy storage unit is used to receive a power supply control instruction of the energy storage unit and perform a power supply operation based on the power supply control instruction of the energy storage unit; The hydrogen production unit 103 is electrically connected to the energy storage unit, and is used to receive the second hydrogen production instruction, and receive the electric energy transmitted by the energy storage unit to perform hydrogen production operation based on the second hydrogen production instruction.

[0037] It can be understood that the energy storage module includes a hydrogen fuel cell, a lithium battery and a super capacitor; the lithium battery and the super capacitor are electrically connected to the bidirectional converter respectively; the hydrogen fuel cell is electrically connected to the unidirectional converter, and the hydrogen fuel cell is connected to the low-pressure hydrogen storage tank through a pipeline via a decompression module; When the sum of the power generation of the floating wind-solar platform is greater than the rated power consumption required by the hydrogen production unit 103, the hydrogen storage unit and the control unit 101, the excess electric energy generated by the floating wind-solar platform is controlled to be transferred to the energy storage unit through the converter.

[0038] When the control unit 101 detects that the power generation of the floating wind-solar platform is less than the power consumption of the hydrogen production unit 103, the hydrogen storage unit and the control unit 101, the lithium battery and the supercapacitor are controlled to supply power to the hydrogen production unit 103, the hydrogen storage unit and the control unit 101. When the control unit 101 detects that the power of the lithium battery and the supercapacitor is too low for a long time, the lithium battery and the supercapacitor will stop working, and the floating wind-solar platform and the hydrogen fuel cell will supply power to the hydrogen storage unit, the control unit 101 and the inverter distribution unit to ensure the normal operation of the hydrogen production system.

[0039] The gas-liquid separation module separates the gas produced by the electrolyzer module into hydrogen and water, wherein the hydrogen is compressed by the hydrogen purification module and the compression module via pipelines to the high-pressure hydrogen storage tank and the low-pressure hydrogen storage tank for storage, and the water is transported to the auxiliary electrolysis module via pipelines for reuse; when the control unit 101 detects that the tank pressure of the low-pressure hydrogen storage tank reaches a threshold value, it will control the compression module to stop storing hydrogen in the low-pressure hydrogen storage tank; the low-pressure hydrogen storage tank is connected to the hydrogen fuel cell via the pressure reducing module via a gas pipeline to provide energy for the hydrogen fuel cell.

[0040] In some embodiments of the present invention, the hydrogen storage unit is electrically connected to the energy storage unit, and is also used to obtain a second hydrogen storage instruction sent by the control unit 101, receive electrical energy sent by the energy storage unit based on the second hydrogen storage instruction, and receive and store hydrogen produced by the hydrogen production unit 103.

[0041] It can be understood that the hydrogen storage unit is communicatively connected to the control unit 101, electrically connected to the wind and solar power generation platform 102, and connected to the hydrogen production unit 103, and is used to obtain the first hydrogen storage instruction sent by the control unit 101, receive the electric energy transmitted by the wind and solar power generation platform 102 based on the first hydrogen storage instruction, and receive and store the hydrogen produced by the hydrogen production unit 103.

[0042] In some embodiments of the present invention, the system further comprises: The inverter distribution unit is electrically connected to the wind-solar power generation platform 102 and is used to convert the direct current power obtained by the wind-solar power generation platform 102 into the first alternating current.

[0043] It can be understood that the inverter distribution unit is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, and the hydrogen storage unit to invert DC power into 220 / 380V AC power and supply power to the system AC load.

[0044] In some embodiments of the present invention, the inverter distribution unit is electrically connected to the energy storage unit, and is used to convert the direct current stored in the energy storage unit into a second alternating current.

[0045] It can be understood that the inverter distribution unit is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, and the hydrogen storage unit to invert DC power into 220 / 380V AC power and supply power to the system AC load.

[0046] In some embodiments of the present invention, the inverter distribution unit is electrically connected to the control unit 101 and is used to transmit the first alternating current or the second alternating current to the control unit 101 .

[0047] It can be understood that the inverter distribution unit is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, and the hydrogen storage unit to invert DC power into 220 / 380V AC power and supply power to the system AC load.

[0048] In some embodiments of the present invention, the inverter distribution unit is electrically connected to the hydrogen production unit 103 and is used to transmit the first alternating current or the second alternating current to the hydrogen production unit 103 .

[0049] It can be understood that the inverter distribution unit is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, and the hydrogen storage unit to invert DC power into 220 / 380V AC power and supply power to the system AC load.

[0050] In some embodiments of the present invention, the inverter distribution unit is electrically connected to the hydrogen storage unit, and is used to transmit the first alternating current or the second alternating current to the hydrogen storage unit.

[0051] It can be understood that the inverter distribution unit is electrically connected to the floating wind-solar platform, the hydrogen production unit 103, the energy storage unit, and the hydrogen storage unit to invert DC power into 220 / 380V AC power and supply power to the system AC load.

[0052] Figure 3 The topological structure diagram of the auxiliary electrolysis module of an embodiment of the offshore floating wind-solar off-grid hydrogen production system provided by the present invention includes: It can be understood that the electrolyzer module is composed of a proton exchange membrane electrolyzer, and the electrolyzer module can adapt to a certain degree of grid power fluctuation; the auxiliary electrolysis module is electrically connected to the inverter distribution unit to obtain electrical energy, and converts seawater into deionized water and transmits it to the electrolyzer module; The auxiliary electrolysis module pre-treats seawater into deionized water by a two-stage reverse osmosis method; the seawater pump, the mixing tank, the filter, the clean seawater storage tank, the seawater desalination device and the deionization device are connected in sequence through pipelines; the mixing tank is used to store untreated seawater; the filter is used to filter impurities in seawater; the clean seawater tank is used to store seawater from which impurities have been removed, and the stored clean seawater can be used as firefighting water; the seawater desalination device desalinates seawater into fresh water containing a small amount of ions by a two-stage reverse osmosis method, and most of the generated fresh water is transported to the deionization device through pipelines, and a small part is used as cooling water for equipment such as electrolyzer modules; the deionization device is respectively connected to the electrolyzer module and the gas-liquid separation module through pipelines, and is used to inject deionized water into the electrolyzer module and receive water separated by the gas-liquid separation module.

[0053] It can be further understood that the auxiliary electrolysis module is electrically connected to the inverter distribution unit to obtain electrical energy; the seawater pump, the mixing tank, the filter, the clean seawater storage tank, the seawater desalination device and the deionization device are connected in sequence through pipelines; the mixing tank is used to store untreated seawater; the filter is used to filter impurities in seawater; the clean seawater tank is used to store seawater from which impurities have been removed, and the stored clean seawater can be used as firefighting water; the seawater desalination device desalinates seawater into fresh water containing a small amount of ions through a two-stage reverse osmosis method, and most of the fresh water produced is transported to the deionization device through pipelines, and a small part is used as cooling water for equipment such as electrolytic cell modules; the deionization device The device is respectively connected to the electrolyzer module and the gas-liquid separation module through pipelines, and is used to inject deionized water into the electrolyzer module; the electrolyzer is connected to the gas-liquid separation module through a pipeline, and the mixed gas generated by the electrolyzer module is separated into water and hydrogen through the gas-liquid separation module, wherein the water is transported to the deionization device through a pipeline for reuse, and the hydrogen is transported to the hydrogen purification module through a pipeline for further purification; the purified hydrogen is transported to the low-pressure hydrogen storage tank and the high-pressure hydrogen storage tank for storage through the compression module through a pipeline; the decompression module is connected to the low-pressure hydrogen storage tank and the hydrogen fuel cell through a pipeline, and can provide hydrogen energy for the hydrogen fuel cell.

[0054] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or decorations made according to the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A offshore floating wind-solar off-grid hydrogen production system, characterized in that: include: A control unit is used to receive wind-solar power generation parameters and power consumption parameters of the hydrogen production unit, obtain wind-solar power generation control instructions and a first hydrogen production instruction based on the wind-solar power generation parameters and the power consumption parameters of the hydrogen production unit, and receive electric energy transmitted by the wind-solar power generation platform; the wind-solar power generation parameters are: wind turbine output voltage, wind turbine output current, photovoltaic output voltage and photovoltaic output current; the power consumption parameters of the hydrogen production unit are: working current, working voltage and working power of the hydrogen production unit; The wind-solar power generation platform is connected to the control unit in communication, and is used to obtain wind-solar power generation parameters, send the wind-solar power generation parameters to the control unit, and receive wind-solar power generation control instructions to perform wind-solar power generation; The hydrogen production unit is communicatively connected to the control unit and electrically connected to the wind and solar power generation platform, and is used to obtain the power consumption parameters of the hydrogen production unit, and send the power consumption parameters of the hydrogen production unit to the control unit, receive a first hydrogen production instruction, and receive the electric energy transmitted by the wind and solar power generation platform based on the first hydrogen production instruction to perform hydrogen production operations.

2. The offshore floating wind-solar off-grid hydrogen production system according to claim 1 is characterized in that: The system comprises: The energy storage unit is communicatively connected with the control unit and electrically connected with the wind and solar power generation platform, and is used to obtain the electric energy reserve parameters of the energy storage unit, and send the electric energy reserve parameters of the energy storage unit to the control unit, receive the energy storage instruction, and store the excess electric energy provided by the wind and solar power generation platform based on the energy storage instruction; the electric energy reserve parameters of the energy storage unit are: the electric quantity, voltage and charge state of the energy storage unit; The control unit is used to receive the electric energy reserve parameter of the energy storage unit and generate an energy storage instruction based on the electric energy reserve parameter of the energy storage unit.

3. The offshore floating wind-solar off-grid hydrogen production system according to claim 2 is characterized in that: The system further comprises: The hydrogen storage unit is communicatively connected to the control unit, electrically connected to the wind and solar power generation platform, and connected to the hydrogen production unit, and is used to obtain a first hydrogen storage instruction sent by the control unit, receive the electric energy transmitted by the wind and solar power generation platform based on the first hydrogen storage instruction, and receive and store the hydrogen produced by the hydrogen production unit.

4. The offshore floating wind-solar off-grid hydrogen production system according to claim 3 is characterized in that: The system further comprises: A control unit, used to obtain a power supply control instruction of the energy storage unit and a second hydrogen production instruction based on wind and solar power generation parameters and power consumption parameters of the hydrogen production unit, and to receive electric energy transmitted by the energy storage unit; The energy storage unit is used to receive a power supply control instruction of the energy storage unit and perform a power supply operation based on the power supply control instruction of the energy storage unit; The hydrogen production unit is electrically connected to the energy storage unit, and is used to receive a second hydrogen production instruction, and receive electric energy transmitted by the energy storage unit based on the second hydrogen production instruction to perform hydrogen production operations.

5. The offshore floating wind-solar off-grid hydrogen production system according to claim 3 or 4, characterized in that: The hydrogen storage unit is electrically connected to the energy storage unit, and is also used to obtain a second hydrogen storage instruction sent by the control unit, receive the electric energy sent by the energy storage unit based on the second hydrogen storage instruction, and receive and store the hydrogen produced by the hydrogen production unit.

6. The offshore floating wind-solar off-grid hydrogen production system according to claim 4 is characterized in that: The system further comprises: The inverter distribution unit is electrically connected to the wind-solar power generation platform and is used to convert the direct current power obtained by the wind-solar power generation platform into the first alternating current.

7. The offshore floating wind-solar off-grid hydrogen production system according to claim 6 is characterized in that: The inverter distribution unit is electrically connected to the energy storage unit and is used to convert the direct current stored in the energy storage unit into a second alternating current.

8. The offshore floating wind-solar off-grid hydrogen production system according to claim 6 or 7, characterized in that: The inverter distribution unit is electrically connected to the control unit and is used to transmit the first alternating current or the second alternating current to the control unit.

9. The offshore floating wind-solar off-grid hydrogen production system according to claim 6 or 7, characterized in that: The inverter distribution unit is electrically connected to the hydrogen production unit and is used to transmit the first alternating current or the second alternating current to the hydrogen production unit.

10. The offshore floating wind-solar off-grid hydrogen production system according to claim 6 or 7, characterized in that: The inverter distribution unit is electrically connected to the hydrogen storage unit and is used to transmit the first alternating current or the second alternating current to the hydrogen storage unit.

Images