CN118611014A - New energy direct current off-grid hydrogen production system - Google Patents
New energy direct current off-grid hydrogen production system Download PDFInfo
- Publication number
- CN118611014A CN118611014A CN202410651625.8A CN202410651625A CN118611014A CN 118611014 A CN118611014 A CN 118611014A CN 202410651625 A CN202410651625 A CN 202410651625A CN 118611014 A CN118611014 A CN 118611014A
- Authority
- CN
- China
- Prior art keywords
- electric energy
- hydrogen production
- module
- energy
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 188
- 239000001257 hydrogen Substances 0.000 title claims abstract description 188
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 186
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 179
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 33
- 238000004146 energy storage Methods 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000005868 electrolysis reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000012983 electrochemical energy storage Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a new energy direct current off-grid hydrogen production system, which relates to the fields of new energy comprehensive utilization, chemical hydrogen production technology and electrolytic aluminum, and comprises the following components: the system comprises a hydrogen production module, a direct current transmission module, an energy management module and a new energy source power module comprising a wind power plant and/or a photovoltaic field; the energy management module is used for determining initial electric energy generated by the wind power plant and/or the photovoltaic field when receiving the hydrogen production instruction sent by the hydrogen production module, and generating an energy adjustment instruction; the direct current transmission module is used for adjusting the initial electric energy into target electric energy when receiving the energy adjustment instruction, transmitting the target electric energy to the hydrogen production module, enabling the hydrogen production module to execute the hydrogen production task, and transmitting the electric energy in an off-grid mode. The hydrogen production task of the invention uses the electric energy generated by the wind farm and/or the photovoltaic farm, and the direct current transmission module transmits the electric energy in an off-grid mode, so that the direct current transmission module is not communicated with a large power grid, does not need to pay net charge, reduces the hydrogen production cost and improves the economy of the hydrogen production system.
Description
Technical Field
The invention relates to the fields of new energy comprehensive utilization, chemical hydrogen production technology and electrolytic aluminum, in particular to a new energy direct current off-grid hydrogen production system.
Background
The energy density of the hydrogen energy is three times that of gasoline, the common lithium battery is seven times that of the gasoline, the combustion process of the hydrogen can not generate carbon dioxide, sulfur dioxide, smoke dust and other atmospheric pollutants, and the combustion product is water, so the energy belongs to zero-emission clean energy, and therefore, the manufacturing of the hydrogen energy is one of the key problems of great attention in the field of new energy.
At present, the equipment adopted for hydrogen production is an alkaline water electrolysis hydrogen production device, for example, a new energy power supply is directly supplied to the water electrolysis hydrogen production device from a new energy station in a point-to-point mode so as to facilitate the water electrolysis hydrogen production device to produce hydrogen. However, the power supply mode of the new energy station for directly supplying the new energy power supply needs to pay a certain net charge to the power grid, so that the electricity price cost of the hydrogen production by water electrolysis is increased, the cost of the prepared green hydrogen is increased, and the economical efficiency of the new energy hydrogen production system is reduced.
Disclosure of Invention
The invention provides a new energy direct current off-grid hydrogen production system, which aims to reduce the electricity cost of hydrogen production work and improve the economy of the new energy hydrogen production system.
According to an aspect of the present invention, there is provided a new energy direct current off-grid hydrogen production system, the system comprising: the system comprises a new energy source power module, a hydrogen production module, a direct current transmission module and an energy management module, wherein the energy management module is respectively connected with the new energy source power module, the hydrogen production module and the direct current transmission module, the direct current transmission module is respectively connected with the hydrogen production module and the new energy source power module, and the new energy source power module comprises a wind power plant and/or a photovoltaic plant;
the energy management module is used for determining initial electric energy generated by the wind power plant and/or the photovoltaic field and generating an energy adjustment instruction when receiving the hydrogen production instruction sent by the hydrogen production module;
The direct current power transmission module is used for adjusting the initial electric energy into target electric energy when receiving the energy adjustment instruction sent by the energy management module, and transmitting the target electric energy to the hydrogen production module so as to enable the hydrogen production module to execute the hydrogen production task, wherein the direct current power transmission module transmits the electric energy in an off-grid mode.
Optionally, the new energy source power module further comprises an energy storage unit; the energy storage unit is used for storing redundant electric energy of the wind power plant and/or the photovoltaic field, wherein the redundant electric energy is the redundant electric energy of the wind power plant and/or the photovoltaic field or the electric energy with fluctuation amplitude larger than a preset amplitude value output by the wind power plant and/or the photovoltaic field.
Optionally, the hydrogen production module comprises a hydrogen production unit and an auxiliary unit; the auxiliary unit is used for assisting the hydrogen production unit to execute the hydrogen production task.
Optionally, the hydrogen production system further comprises: an electrolytic aluminum module; the electrolytic aluminum module comprises a first power interface and a second power interface, wherein the first power interface is connected with the direct current transmission module, and the second power interface is connected with a power grid.
Optionally, the direct current transmission module comprises a first boost unit, a second boost unit, a first buck unit, a second buck unit, an inverter and an off-grid transmission unit; the first end of first boost unit is connected with wind farm, and photovoltaic field is connected to the first end of second boost unit, and hydrogen production unit is connected to the first end of first step-down unit, and electrolytic aluminum module is connected to the first end of second step-down unit, and auxiliary unit is connected to the first end of dc-to-ac converter, and off-grid transmission unit connects energy storage unit, the second end of first boost unit, the second end of second boost unit, the second end of first step-down unit respectively, obtains the second end of second step-down unit and the second end of dc-to-ac converter.
Optionally, the initial electric energy includes a first initial electric energy and a second initial electric energy, and the target electric energy includes a first target electric energy, a second target electric energy and a third target electric energy; the first boosting unit is used for boosting the voltage level of first initial electric energy generated by the wind power plant according to a first boosting rule to obtain first intermediate electric energy; the second boosting unit is used for boosting the voltage level of second initial electric energy generated by the photovoltaic field according to a second boosting rule to obtain second intermediate electric energy; the first voltage reduction unit is used for reducing the voltage level of the intermediate electric energy according to a first voltage reduction rule to obtain first target electric energy, wherein the intermediate electric energy is the first intermediate electric energy and/or the second intermediate electric energy; the second voltage reduction unit is used for reducing the voltage level of the intermediate electric energy according to a second voltage reduction rule to obtain second target electric energy; the inverter is used for reducing the voltage level of the intermediate electric energy according to a third voltage reduction rule, and converting the electric energy form of the reduced intermediate electric energy to obtain third target electric energy.
Optionally, the energy management module is further configured to: when the initial electric energy is larger than the preset electric energy, the direct current transmission module is controlled to transmit the electric energy larger than the preset electric energy in the initial electric energy to the electrolytic aluminum module so as to reduce the power consumption of a power grid of the electrolytic aluminum module.
Optionally, the number of the hydrogen production units and the auxiliary units is at least two, and the hydrogen production units and the auxiliary units are in one-to-one correspondence.
Optionally, the voltage level of the first intermediate electric energy is 20kV, the voltage level of the second intermediate electric energy is 20kV, the voltage level of the first target electric energy is 625V, the voltage level of the second target electric energy is 1250V, and the voltage level of the third target electric energy is 380V.
Optionally, the third target electrical energy is alternating current.
The invention relates to a new energy direct current off-grid hydrogen production system, which comprises: the system comprises a new energy source power module, a hydrogen production module, a direct current transmission module and an energy management module, wherein the energy management module is respectively connected with the new energy source power module, the hydrogen production module and the direct current transmission module, the direct current transmission module is respectively connected with the hydrogen production module and the new energy source power module, and the new energy source power module comprises a wind power plant and/or a photovoltaic plant; the energy management module is used for determining initial electric energy generated by the wind power plant and/or the photovoltaic field and generating an energy adjustment instruction when receiving the hydrogen production instruction sent by the hydrogen production module; the direct current power transmission module is used for adjusting the initial electric energy into target electric energy when receiving the energy adjustment instruction sent by the energy management module, and transmitting the target electric energy to the hydrogen production module so as to enable the hydrogen production module to execute the hydrogen production task, wherein the direct current power transmission module transmits the electric energy in an off-grid mode. According to the technical scheme, when the energy management module receives the hydrogen production instruction of the hydrogen production module, the initial electric energy generated by the wind power plant and/or the photovoltaic field is judged, and the energy adjustment instruction is sent to the direct current transmission module, so that the direct current transmission module adjusts the initial electric energy into target electric energy, and transmits the electric energy to the hydrogen production module in an off-grid mode, the hydrogen production module executes the hydrogen production task, the problems of quota rate, phase and phase locking and the like do not exist when the direct current transmission module runs, the investment cost of an electrochemical energy storage scale and an energy storage component can be greatly reduced, the electric quantity loss when the energy storage component is charged and discharged, and the hydrogen production efficiency and the resource utilization rate of the hydrogen production system are improved. And secondly, the hydrogen production system uses the wind power plant and/or the photovoltaic plant to supply power, so that the electricity cost of hydrogen production work can be reduced, the off-grid transmission mode is not communicated with a large power grid, the net passing fee of the power grid is not required to be paid, the hydrogen production cost is reduced, and the economy of the hydrogen production work is improved. The method solves the problems that the power supply mode of the new energy station direct-power-supply water-supply hydrogen production system needs to pay a certain net charge to the power grid, the electricity price cost of water electrolysis hydrogen production is increased, the cost of the prepared green hydrogen is increased, and the economical efficiency of the new energy hydrogen production system is reduced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a new energy DC off-grid hydrogen production system according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a new energy dc off-grid hydrogen production system according to a second embodiment of the present invention.
Reference numerals illustrate:
101-new energy source power supply module, 1011-wind power plant, 1012-photovoltaic plant, 1013-energy storage unit, 102-hydrogen production module, 1021-hydrogen production unit, 1022-auxiliary unit, 103-direct current transmission module, 1031-first boosting unit, 1032-second boosting unit, 1033-first voltage reduction unit, 1034-second voltage reduction unit, 1035-inverter, 1036-off-grid transmission unit, 104-energy management module, 105-electrolytic aluminum module,
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a schematic structural diagram of a new energy direct current off-grid hydrogen production system according to a first embodiment of the present invention, where the present embodiment may be applicable to situations of reducing complexity and cost of hydrogen production electricity price of the hydrogen production system, improving economy of new energy hydrogen production work, etc., and referring to fig. 1, the system includes: the system comprises a new energy source power module 101, a hydrogen production module 102, a direct current transmission module 103 and an energy management module 104, wherein the energy management module 104 is respectively connected with the new energy source power module 101, the hydrogen production module 102 and the direct current transmission module 103, the direct current transmission module 103 is respectively connected with the hydrogen production module 102 and the new energy source power module 101, and the new energy source power module 101 comprises a wind farm 1011 and/or a photovoltaic farm 1012.
The energy management module is used for determining initial electric energy generated by the wind power plant and/or the photovoltaic field and generating an energy adjustment instruction when receiving the hydrogen production instruction sent by the hydrogen production module; the direct current power transmission module is used for adjusting the initial electric energy into target electric energy when receiving the energy adjustment instruction sent by the energy management module, and transmitting the target electric energy to the hydrogen production module so as to enable the hydrogen production module to execute the hydrogen production task, wherein the direct current power transmission module transmits the electric energy in an off-grid mode.
The new energy source module can be understood as a device integrating energy production and storage, the direct current transmission module can be understood as a direct current power transmission device, the hydrogen production module is equipment for producing hydrogen energy, and the energy management module can be understood as a control component for data acquisition, processing and instruction generation, and the control component comprises a microprocessor, a programmable logic controller, a computer, a server and the like. The wind farm is a power plant for generating electricity by using wind power, for example, a plurality of large grid-connected wind generators are installed on a site with good wind energy resources, and are arrayed according to the terrain and the main wind direction to form a cluster to supply power to a power grid or equipment to be powered. The photovoltaic field is a power generation system which is formed by utilizing solar energy and adopting electronic elements of special materials such as crystalline silicon plates, and is connected with a power grid or equipment to be powered and used for transmitting power to the power grid or the equipment to be powered.
Specifically, the hydrogen production command may be understood as indicative information of hydrogen production requirements sent by the hydrogen production module, to indicate that the hydrogen production module needs to start hydrogen production, and the initial electrical energy may be understood as electrical energy generated and output by the wind farm and/or the photovoltaic farm, for example, electrical energy generated and output by the wind farm (in the case of no wind), electrical energy generated and output by the photovoltaic farm (in the case of no wind), and electrical energy generated and output by the wind farm and the photovoltaic farm (in the case of wind and light). Because the environmental information of the wind power plant and the position of the photovoltaic power plant is changed in real time, the position of the wind power plant may not be windy in a certain time period, and the position of the photovoltaic power plant may not be windy in a certain time period, the initial electric energy is any one of the electric energy generated and output by the wind power plant, the electric energy generated and output by the photovoltaic power plant and the electric energy generated and output by the wind power plant and the photovoltaic power plant. The energy adjustment instruction can be understood as working instruction information of the direct current power transmission module, and is used for prompting the direct current power transmission module to transmit electric energy generated and output by the wind power plant and/or the photovoltaic field to the hydrogen production module so as to enable the hydrogen production module to work. The working electric energy required by different equipment is different, the target electric energy can be understood as electric energy with a voltage level required by the hydrogen production module, and the direct current transmission module can adjust the initial electric energy after receiving the initial electric energy, so as to obtain the target electric energy capable of enabling the hydrogen production module to work and transmit the target electric energy to the hydrogen production module.
In the invention, the installed capacity of the photovoltaic field is 20 megawatts, the installed capacity of the wind power field is 30 megawatts, and the total installed capacity of the new energy source power module is 50 megawatts. The invention adopts new energy to supply power, and the set advantage is that the power grid electricity cost of hydrogen production work is reduced, and the economy of the new energy hydrogen production work is improved.
Furthermore, the energy management module can also control the energy storage component of the new energy source module to store the initial electric energy generated by the wind power field and/or the photovoltaic field when receiving the instruction of stopping hydrogen production sent by the hydrogen production unit, and the arrangement has the advantage that the energy utilization rate can be improved.
According to the new energy direct current off-grid hydrogen production system, when the energy management module receives a hydrogen production instruction of the hydrogen production module, initial electric energy generated by a wind power plant and/or a photovoltaic field is determined, and an energy adjustment instruction is sent to the direct current transmission module, so that the direct current transmission module adjusts the initial electric energy into target electric energy, and transmits the electric energy to the hydrogen production module in an off-grid mode, the hydrogen production module executes a hydrogen production task, and the problems of quota rate, phase and phase locking and the like do not exist when the direct current transmission module operates, so that the electrochemical energy storage scale and investment cost can be greatly reduced, the electric quantity loss of an energy storage component during charging and discharging operation is reduced, and the hydrogen production efficiency and the electric energy utilization rate of the hydrogen production system are improved. And secondly, the hydrogen production system is powered by the wind farm and/or the photovoltaic farm, so that the electricity cost of the hydrogen production system can be reduced, the off-grid transmission mode is not communicated with a large power grid, the net passing fee of the power grid is not required to be paid, the hydrogen production cost is reduced, and the economy of the hydrogen production system is improved. The method solves the problems that the power supply mode of the new energy station direct-power-supply water-supply hydrogen production system needs to pay a certain net charge to the power grid, the electricity price cost of water electrolysis hydrogen production is increased, the cost of the prepared green hydrogen is increased, and the economical efficiency of the new energy hydrogen production system is reduced.
Example two
Fig. 2 is a schematic structural diagram of a new energy dc off-grid hydrogen production system according to the second embodiment of the present invention, where the present embodiment may be adapted to situations of reducing complexity and cost of hydrogen production electricity price of the hydrogen production system, improving economy of the new energy hydrogen production system, etc., and referring to fig. 2, the system further includes an electrolytic aluminum module 105 based on the new energy dc off-grid hydrogen production system according to the first embodiment; the hydrogen production module 102 includes a hydrogen production unit 1021 and an auxiliary unit 1022; the new energy source module 101 further includes an energy storage unit 1013; the dc power transmission module 103 includes a first boost unit 1031, a second boost unit 1032, a first buck unit 1033, a second buck unit 1034, an inverter 1035, and an off-grid transmission unit 1036.
The electrolytic aluminum module comprises a first power interface and a second power interface, wherein the first power interface is connected with the direct current transmission module, and the second power interface is connected with a power grid; the auxiliary unit is used for assisting the hydrogen production unit to execute the hydrogen production task; the energy storage unit is used for storing redundant electric energy of the wind power plant and/or the photovoltaic field, wherein the redundant electric energy is the redundant electric energy of the wind power plant and/or the photovoltaic field or the electric energy with fluctuation amplitude larger than a preset amplitude value output by the wind power plant and/or the photovoltaic field.
The preset amplitude value is the basis for measuring the fluctuation amplitude of the new energy power supply, and when the fluctuation amplitude of the new energy power supply is larger than the preset amplitude value, the new energy power supply is considered to have larger fluctuation.
In this embodiment, the energy adjustment instruction is used to prompt the direct current power transmission module to adjust and transmit the electric energy generated and output by the wind power plant and/or the photovoltaic field to the hydrogen production module and the electrolytic aluminum module, so that the hydrogen production module and the electrolytic aluminum module work.
The common hydrogen production module belongs to an alkaline water electrolysis hydrogen production device, the device has poor fluctuation tolerance to a new energy power supply, and needs to discard a part of new energy power supply with larger fluctuation range, or one path of commercial power supply is configured to stabilize the fluctuation of the new energy power supply, but no matter the new energy is used for discarding wind, discarding light or purchasing commercial power to stabilize the fluctuation of the new energy power supply, the device can cause the increase of electricity cost and the decrease of project economy of new energy hydrogen production projects. Therefore, the invention is provided with the energy storage unit for storing the new energy power supply with larger fluctuation range, thereby not only preserving the new energy power supply, but also not increasing the electricity cost and the structural complexity of the hydrogen production system. Further, the electricity consumption of the hydrogen production module is limited, and the surplus electricity can be understood as the electricity which can not be consumed by the hydrogen production module, and the energy storage unit can store the electricity. In addition, when the electric energy generated by the wind power plant and/or the photovoltaic field cannot maintain the operation of the hydrogen production module, the electric energy stored by the energy storage unit can be used for assisting the wind power plant and/or the photovoltaic field to supply power to the hydrogen production module. The energy storage energy of the energy storage unit per hour is 20MWh.
Specifically, the work of the electrolytic aluminum module does not depend on a new energy power supply, and the purpose of the invention is to utilize the electrolytic aluminum module to consume new energy electric quantity which cannot be consumed by the electrolytic water hydrogen production module in a large generation period of wind power and photovoltaic new energy, so that the green electricity proportion of the electrolytic aluminum module is improved while 100% consumption of the wind power and photovoltaic green electric quantity is realized.
From fig. 2, it can be seen that the connection relation of the new energy direct current off-grid hydrogen production system is shown, the port numbers of all the components are not shown in the figure, specifically, the first end of the first voltage boosting unit is connected with the wind power plant, the first end of the second voltage boosting unit is connected with the photovoltaic field, the first end of the first voltage reducing unit is connected with the hydrogen production unit, the first end of the second voltage reducing unit is connected with the electrolytic aluminum module, the first end of the inverter is connected with the auxiliary unit, and the off-grid transmission unit is respectively connected with the energy storage unit, the second end of the first voltage boosting unit, the second end of the second voltage boosting unit, the second end of the first voltage reducing unit, the second end of the second voltage reducing unit and the second end of the inverter.
Specifically, the number of the hydrogen production units and the auxiliary units is at least two, the hydrogen production units and the auxiliary units are in one-to-one correspondence, the scale of a single alkaline water electrolysis hydrogen production device is 1000Nm3/h, and the purity of the produced hydrogen is 99.999%. The inverter can convert the new energy wind power and photovoltaic green power which are partially transmitted by direct current off-grid into alternating current and then supply the alternating current to the auxiliary machine (namely the auxiliary unit) of the electrolyzed water hydrogen production module, the commercial power is not needed to supply energy for the auxiliary machine of the electrolyzed water hydrogen production module, and all power sources of the whole electrolyzed water hydrogen production module are supplied by the new energy wind power and/or photovoltaic green power, so that the electricity price cost of hydrogen production is reduced, the electricity consumption of the electrolyzed water hydrogen production module is ensured to be 100% of green power, further 100% of green hydrogen with high overflow price is prepared, and the economy of hydrogen production projects is improved.
In one embodiment, the direct current transmission module adopts a voltage level of 20kV, and after the wind power plant and the photovoltaic power plant green electricity are boosted to the voltage level of 20kV from the respective direct current booster, the wind power plant green electricity is transmitted to the direct current step-down transformer near the electrolytic water hydrogen production module and the electrolytic aluminum module in a direct current mode, and is reduced to 1250V and 650V through the direct current step-down transformer and then is transmitted to the electrolytic aluminum module (corresponding to 1250V) and the electrolytic water hydrogen production module (corresponding to 650V).
Optionally, the initial electrical energy includes a first initial electrical energy and a second initial electrical energy, and the target electrical energy includes a first target electrical energy, a second target electrical energy, and a third target electrical energy.
The first boosting unit is used for boosting the voltage level of first initial electric energy generated by the wind power plant according to a first boosting rule to obtain first intermediate electric energy; the second boosting unit is used for boosting the voltage level of second initial electric energy generated by the photovoltaic field according to a second boosting rule to obtain second intermediate electric energy; the first voltage reduction unit is used for reducing the voltage level of the intermediate electric energy according to a first voltage reduction rule to obtain first target electric energy, wherein the intermediate electric energy is the first intermediate electric energy and/or the second intermediate electric energy; the second voltage reduction unit is used for reducing the voltage level of the intermediate electric energy according to a second voltage reduction rule to obtain second target electric energy; the inverter is used for reducing the voltage level of the intermediate electric energy according to a third voltage reduction rule, and converting the electric energy form of the reduced intermediate electric energy to obtain third target electric energy.
The voltage level of the first intermediate electric energy is 20kV, the voltage level of the second intermediate electric energy is 20kV, the voltage level of the first target electric energy is 625V, the voltage level of the second target electric energy is 1250V, the voltage level of the third target electric energy is 380V, and the third target electric energy is alternating current.
Specifically, the first boosting rule is to boost the voltage level of the first initial electric energy to 20kV voltage level so that the direct current transmission module transmits the first initial electric energy after the boosted voltage level, the first intermediate electric energy is the first initial electric energy after the boosted voltage level, that is, the first initial electric energy after the boosted voltage level, the second boosting rule is to boost the voltage level of the second initial electric energy to 20kV voltage level so that the direct current transmission module transmits the second initial electric energy after the boosted voltage level, and the second intermediate electric energy is the second initial electric energy after the boosted voltage level, that is, the second initial electric energy after the boosted voltage level. The black bold line in fig. 2 indicates the off-grid transmission unit, and it can be seen from fig. 2 that both the first intermediate power and the second intermediate power flow to the off-grid transmission unit so that the off-grid transmission unit transmits the intermediate power. The first target electric energy is electric energy required by the hydrogen production unit, such as electric energy with a voltage level of 625V, the first voltage reduction rule can be understood as reducing the voltage level of the intermediate electric energy to 625V, the second target electric energy is electric energy required by the electrolytic aluminum unit, such as electric energy with a voltage level of 1250V, the second voltage reduction rule can be understood as reducing the voltage level of the intermediate electric energy to 1250V, the third target electric energy is electric energy required by the auxiliary unit, such as 380V alternating current, the third voltage reduction rule can be understood as reducing the voltage level of the intermediate electric energy to 380V, and the electric energy form of the intermediate electric energy after the voltage reduction can be understood as converting the direct current into alternating current for the auxiliary unit to work.
The energy management module is also to: when the initial electric energy is larger than the preset electric energy, the direct current transmission module is controlled to transmit the electric energy larger than the preset electric energy in the initial electric energy to the electrolytic aluminum module so as to reduce the power consumption of a power grid of the electrolytic aluminum module.
The preset electric energy can be understood as electric energy required by the hydrogen production module, and the set electric energy has the advantages of supplying redundant electric energy to the electrolytic aluminum module, improving the green electricity proportion of the electrolytic aluminum module and reducing the power consumption of a power grid and the cost of electrolytic aluminum of the electrolytic aluminum module.
According to the new energy direct current off-grid hydrogen production system, when the energy management module receives a hydrogen production instruction of the hydrogen production module, initial electric energy generated by a wind power plant and/or a photovoltaic field is determined, and an energy adjustment instruction is sent to the direct current transmission module, so that the direct current transmission module adjusts the initial electric energy into target electric energy, and transmits the electric energy to the hydrogen production module in an off-grid mode, the hydrogen production module executes a hydrogen production task, and the problems of quota rate, phase and phase locking and the like do not exist when the direct current transmission module operates, so that the electrochemical energy storage scale and investment cost can be greatly reduced, the electric quantity loss of an energy storage component during charging and discharging operation is reduced, and the hydrogen production efficiency and the electric energy utilization rate of the hydrogen production system are improved. And secondly, the hydrogen production system uses the wind power plant and/or the photovoltaic plant to supply power, so that the electricity cost of hydrogen production work can be reduced, the off-grid transmission mode is not communicated with a large power grid, the net passing fee of the power grid is not required to be paid, the hydrogen production cost is reduced, and the economy of the hydrogen production system is improved. The new energy electric energy which is not used up by the hydrogen production module can be provided for the electrolytic aluminum module, the green electricity proportion of the electrolytic aluminum module is improved while 100% of the wind power and photovoltaic green electricity is consumed, and the power grid electricity consumption and the electrolytic aluminum cost of the electrolytic aluminum module are reduced. The method solves the problems that the power supply mode of the new energy station direct-power-supply water-supply hydrogen production system needs to pay a certain net charge to the power grid, the electricity price cost of water electrolysis hydrogen production is increased, the cost of the prepared green hydrogen is increased, and the economy of new energy hydrogen production work is reduced.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. The new energy direct current off-grid hydrogen production system is characterized by comprising: the system comprises a new energy source power module, a hydrogen production module, a direct current transmission module and an energy management module, wherein the energy management module is respectively connected with the new energy source power module, the hydrogen production module and the direct current transmission module, the direct current transmission module is respectively connected with the hydrogen production module and the new energy source power module, and the new energy source power module comprises a wind power plant and/or a photovoltaic plant;
The energy management module is used for determining initial electric energy generated by the wind power plant and/or the photovoltaic field and generating an energy adjustment instruction when receiving the hydrogen production instruction sent by the hydrogen production module;
The direct current transmission module is used for adjusting the initial electric energy into target electric energy when the energy adjustment instruction sent by the energy management module is received, and transmitting the target electric energy to the hydrogen production module so as to enable the hydrogen production module to execute a hydrogen production task, wherein the direct current transmission module transmits electric energy in an off-grid mode.
2. The system of claim 1, wherein the new energy source module further comprises an energy storage unit;
the energy storage unit is used for storing redundant electric energy of the wind power plant and/or the photovoltaic plant, wherein the redundant electric energy is the redundant electric energy of the wind power plant and/or the photovoltaic plant or the electric energy with fluctuation amplitude greater than a preset amplitude value output by the wind power plant and/or the photovoltaic plant.
3. The system of claim 2, wherein the hydrogen production module comprises a hydrogen production unit and an auxiliary unit;
The auxiliary unit is used for assisting the hydrogen production unit to execute the hydrogen production task.
4. A system according to claim 3, further comprising: an electrolytic aluminum module;
the electrolytic aluminum module comprises a first power interface and a second power interface, wherein the first power interface is connected with the direct current transmission module, and the second power interface is connected with a power grid.
5. The system of claim 4, wherein the direct current transmission module comprises a first boost unit, a second boost unit, a first buck unit, a second buck unit, an inverter, and an off-grid transmission unit;
The first end of the first boost unit is connected with the wind farm, the first end of the second boost unit is connected with the photovoltaic field, the first end of the first buck unit is connected with the hydrogen production unit, the first end of the second buck unit is connected with the electrolytic aluminum module, the first end of the inverter is connected with the auxiliary unit, and the off-grid transmission unit is respectively connected with the energy storage unit, the second end of the first boost unit, the second end of the second boost unit, the second end of the first buck unit, the second end of the second buck unit and the second end of the inverter.
6. The system of claim 5, wherein the initial power comprises a first initial power and a second initial power, and the target power comprises a first target power, a second target power, and a third target power;
the first boosting unit is used for boosting the voltage level of the first initial electric energy generated by the wind farm according to a first boosting rule to obtain first intermediate electric energy;
The second boosting unit is used for boosting the voltage level of the second initial electric energy generated by the photovoltaic field according to a second boosting rule to obtain second intermediate electric energy;
the first step-down unit is used for reducing the voltage level of the intermediate electric energy according to a first step-down rule to obtain first target electric energy, wherein the intermediate electric energy is the first intermediate electric energy and/or the second intermediate electric energy;
the second step-down unit is used for reducing the voltage level of the intermediate electric energy according to a second step-down rule to obtain second target electric energy;
and the inverter is used for reducing the voltage level of the intermediate electric energy according to a third voltage reduction rule, and converting the electric energy form of the intermediate electric energy after voltage reduction to obtain third target electric energy.
7. The system of claim 4, wherein the energy management module is further configured to:
When the initial electric energy is larger than the preset electric energy, the direct-current power transmission module is controlled to transmit the electric energy larger than the preset electric energy in the initial electric energy to the electrolytic aluminum module so as to reduce the power consumption of a power grid of the electrolytic aluminum module.
8. The system of claim 3, wherein the number of hydrogen production units and auxiliary units is at least two, the hydrogen production units being in one-to-one correspondence with the auxiliary units.
9. The system of claim 6, wherein the system further comprises a controller configured to control the controller,
The voltage level of the first intermediate electric energy is 20kV, the voltage level of the second intermediate electric energy is 20kV, the voltage level of the first target electric energy is 625V, the voltage level of the second target electric energy is 1250V, and the voltage level of the third target electric energy is 380V.
10. The system of claim 6, wherein the third target electrical energy is alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410651625.8A CN118611014A (en) | 2024-05-24 | 2024-05-24 | New energy direct current off-grid hydrogen production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410651625.8A CN118611014A (en) | 2024-05-24 | 2024-05-24 | New energy direct current off-grid hydrogen production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118611014A true CN118611014A (en) | 2024-09-06 |
Family
ID=92547132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410651625.8A Pending CN118611014A (en) | 2024-05-24 | 2024-05-24 | New energy direct current off-grid hydrogen production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118611014A (en) |
-
2024
- 2024-05-24 CN CN202410651625.8A patent/CN118611014A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110544935B (en) | Electric-hydrogen multi-energy complementary direct-current micro-grid coordinated scheduling method | |
| CN105905968B (en) | Energy-saving seawater desalination device with wind energy and light energy complementary power generation and control method | |
| CN106541845B (en) | A kind of wireless electric automobile charging system actual and control method | |
| CN102116244A (en) | Wind-light supplementary power generating energy storing device | |
| CN113452044B (en) | Wind power photovoltaic power grid dispatching method of hydrogen-containing and liquid metal battery hybrid energy storage system | |
| CN114024327A (en) | Renewable energy power generation based multi-energy complementation control system and method | |
| CN109936167A (en) | A kind of light/wind suitable for water electrolysis hydrogen production/storage/alternating current electric energy scheduling system and method | |
| CN115528708A (en) | Capacity optimization configuration method for wind-solar-storage coupling off-grid hydrogen production micro-grid system | |
| CN112260260A (en) | New energy power generation direct current grid-connected system and control method thereof | |
| CN211598925U (en) | Wind-solar hybrid off-line power generation driving block oil production system | |
| CN115296321A (en) | Off-grid photovoltaic hydrogen production coupling control system | |
| CN112290580A (en) | New energy hydrogen production system | |
| CN114977246A (en) | Method and equipment for hydrogen production and energy storage of photovoltaic power station | |
| CN108629445B (en) | AC/DC hybrid microgrid robust scheduling method considering energy storage dynamic loss | |
| CN114156920A (en) | Capacity allocation method for electricity-heat energy storage in multi-energy complementary comprehensive energy system | |
| CN111030148B (en) | Zero-pollution electric power micro-grid system composed of multiple green energy sources | |
| CN217642738U (en) | Comprehensive energy system based on wind, light and hydrogen storage multi-energy complementation | |
| CN113541133B (en) | Fine scheduling method for hybrid micro-grid | |
| CN106058935A (en) | Distributed type wind and optical energy storing and charging integrated micro power grid system | |
| CN118611014A (en) | New energy direct current off-grid hydrogen production system | |
| CN115595602A (en) | Water electrolysis hydrogen production system and power supply control method thereof | |
| CN116154836A (en) | Unit combination based on new energy consumption and energy management optimizing system thereof | |
| CN114844079A (en) | Comprehensive energy system based on wind, light and hydrogen storage multi-energy complementation and control method | |
| CN105978129A (en) | Distributed wind/photovoltaic power generation energy-storing and charging integrated charging method | |
| CN219394440U (en) | Wind-solar complementary power supply device for on-site hydrogen production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |