CN113541199A - Hydrogen-electricity coupling new energy system and control method thereof - Google Patents
Hydrogen-electricity coupling new energy system and control method thereof Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/008—Systems for storing electric energy using hydrogen as energy vector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention belongs to the technical field of new energy, and particularly provides a hydrogen-electricity coupling new energy system and a control method thereof, aiming at solving the problem of how to realize hydrogen-electricity coupling in the new energy system. To this end, the content of the invention comprises: the hydrogen-electricity coupling new energy system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, a gas generator, hydrogen and carbon monoxide separation equipment, a first gas storage tank, a second gas storage tank and the like; and controlling the operation of each device and the opening or closing of the pipeline between each device according to the data of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first air storage tank, the second air storage tank and the like. By applying the method, the wind and light abandoning rate of the new energy power grid is reduced, the problem of power grid fluctuation caused by uncertainty of new energy power generation can be solved, carbon dioxide greenhouse gas in the atmosphere can be consumed in the process of hydrogen production from residual electricity, and double effects of energy utilization and environmental protection are realized.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly provides a hydrogen-electricity coupling new energy system and a control method thereof.
Background
The energy industry is a key industry for realizing the targets of carbon peak reaching and carbon neutralization in China, and the development of clean energy is a main path, wherein the conversion of traditional electric power into clean electric power is the most important. The hydrogen energy is recognized clean energy and has the characteristics of good combustibility, high calorific value, no toxicity, no pollution and the like; and the hydrogen energy is used as a secondary energy, and green hydrogen is prepared by renewable energy, so that the development bottleneck problem of the renewable energy can be effectively solved. Therefore, hydrogen energy is incorporated into a terminal energy system, and is synergistically complementary with electric power, so that the hydrogen energy becomes a terminal energy consumption main body in the future.
New energy power systems develop rapidly in China, and the installed capacity of new energy power generation is increased continuously. However, new energy such as wind, light and the like is greatly influenced by natural environment, on one hand, the average wind and light abandoning rate of the whole country is still not low, and even the light abandoning rate of part of regions is as high as 30 percent; on the other hand, the new energy power grid sometimes has insufficient power supply. Therefore, how to produce hydrogen by utilizing surplus electric energy generated by new energy through hydrogen-electricity coupling to provide power for hydrogen energy equipment, and meanwhile, the stored hydrogen energy can also be used as standby energy of a new energy power system to convert the hydrogen energy into electric energy when needed. In addition, how to further consume carbon dioxide in the hydrogen production process, the dual effects of energy utilization and environmental protection are realized, and the problem of new energy construction needs to be considered.
Accordingly, there is a need in the art for a new solution to the above-mentioned problems.
Disclosure of Invention
The method aims to solve the problems in the prior art, namely, the problems that hydrogen is generated by using the new energy to produce hydrogen by using the surplus electricity, the hydrogen energy is stored to supplement the shortage of the new energy and/or provide energy for hydrogen equipment, and carbon dioxide is further consumed in the hydrogen production process are solved. In a first aspect, the present invention provides a hydrogen-electricity coupled new energy system, comprising:
the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, a gas generator, hydrogen and carbon monoxide separation equipment, a first gas storage tank and a second gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with the first gas storage tank through a first pipeline and provides a gas source for the first gas storage tank;
the plasma hydrogen production station is connected with the hydrogen and carbon monoxide separation equipment through a third pipeline and provides an air source for the hydrogen and carbon monoxide separation equipment;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with a natural gas pipe network through a second pipeline, and the hydrogen and carbon monoxide separation equipment provides a gas source for the natural gas pipe network;
the hydrogen and carbon monoxide separation equipment is connected with the first gas storage tank through a fourth pipeline, and the first gas storage tank provides a gas source for the hydrogen and carbon monoxide separation equipment;
the hydrogen and carbon monoxide separation equipment is connected with the second gas storage tank through a fifth pipeline and provides a gas source for the second gas storage tank;
the gas generator is connected with the first gas storage tank through a sixth pipeline, and the first gas storage tank provides a gas source for the gas generator;
the gas generator is connected with the natural gas pipe network through a seventh pipeline, and the natural gas pipe network provides a gas source for the gas generator;
the gas generator is connected with the power grid main line and provides standby electric energy for the new energy system, wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
In a second aspect, the present invention provides a method for controlling a hydrogen-electricity coupled new energy system, the method comprising the following steps:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first air storage tank and the pressure of the second air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station, the gas generator and the hydrogen and carbon monoxide separation equipment to work and controlling the seven pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank.
In an embodiment of the above method for controlling a hydrogen-electricity coupled new energy system, the step S2 specifically includes:
case 1: when P is presentNER>PLOAD，UESS<UESS_max，p2>P2_ l, and (P)NER-PLOAD)≤PBAT_inWhen the power station is started to store redundant electric energy, the gas generator stops working, the plasma hydrogen generation station stops working, the hydrogen and the carbon monoxide stop working, and all the seven pipelines are closed; and/or
Case 2: when P is presentNER>PLOAD，UESS<UESS_max，p2<p2_l，(PNER-PLOAD)≤PBAT_inAnd p1>When p1_ l, the energy storage power station starts to store redundant electric energy, the hydrogen and carbon monoxide separation equipment is started, and the plasma hydrogen generation station stops workingThe gas generator stops working; opening the fourth pipeline, opening the fifth pipeline, and closing the other five pipelines; and/or
Case 3: when P is presentNER>PLOAD，UESS<UESS_max，p2<p2_l，(PNER-PLOAD)≤PBAT_inAnd when p1 is not more than p1_ l, the energy storage power station starts to store redundant electric energy, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, and the gas generator stops working; opening the third pipeline, opening the fifth pipeline, and closing the other five pipelines; and/or
Case 4: when P is presentNER>PLOAD，UESS<UESS_max，p2>p2_l，(PNER-PLOAD)>PBAT_inAnd p1<When p1_ h is reached, the energy storage power station starts to store redundant electric energy, the plasma hydrogen generation station is started, the gas generator stops working, the hydrogen and carbon monoxide separation equipment stops working, the first pipeline is started, and the other six pipelines are closed; and/or
Case 5: when P is presentNER>PLOAD，UESS<UESS_max，p1≥p1_h，(PNER-PLOAD)>PBAT_inAnd p2<When p2_ h is reached, the energy storage power station starts to store redundant electric energy, the plasma hydrogen production station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the third pipeline is started, the fifth pipeline is started, and other five pipelines are closed; and/or
Case 6: when P is presentNER>PLOAD，UESS<UESS_maxP1 ≧ P1_ h, P2 ≧ P2_ h, and (P)NER-PLOAD)>PBAT_inWhen the power station is started to store redundant electric energy, the plasma hydrogen production station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the second pipeline is started, the third pipeline is started, and the other five pipelines are closed; and/or
Case 7: when P is presentNER>PLOAD，UESS≥UESS_max，p2>p2_ l, and p1<When p1_ h, starting the plasma hydrogen generation station, stopping the energy storage power station, stopping the gas generator, stopping the hydrogen and carbon monoxide separation equipment, starting the first pipeline, and closing the other six pipelines; and/or
Case 8: when P is presentNER>PLOAD，UESS≥UESS_maxP1 ≧ p1_ h, and p2<When p2_ h is reached, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the energy storage power station stops working, the third pipeline is started, the fifth pipeline is started, and the other five pipelines are closed; and/or
Case 9: when P is presentNER>PLOAD，UESS≥UESS_maxWhen p1 is not less than p1_ h and p2 is not less than p2_ h, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, the energy storage power station stops working, the gas generator stops working, the second pipeline is started, the third pipeline is started, and the other five pipelines are closed; wherein the content of the first and second substances,
PLOAD(ii) is the electrical energy load demand;
PNERthe output power of the new energy power station is obtained;
PBAT_ininput power when storing electrical energy for the energy storage power station;
UESSis the electric quantity value, U, of the energy storage power stationESS_maxThe electric quantity is the upper limit threshold value of the energy storage power station;
p1 is the pressure value of the first air storage tank, p1_ l is the lower pressure threshold value of the first air storage tank, and p1_ h is the upper pressure threshold value of the first air storage tank;
p2 is the pressure value of the second air storage tank, p2_ l is the lower pressure threshold value of the second air storage tank, and p2_ h is the upper pressure threshold value of the second air storage tank.
In an embodiment of the above method for controlling a hydrogen-electricity coupled new energy system, the step S2 further includes:
and when the output power of the new energy power station is smaller than the electric energy load demand, selectively and preferentially starting the energy storage power station or the gas generator to serve as standby electric energy.
In an embodiment of the above method for controlling a hydrogen-electricity coupled new energy system, the step of selectively preferentially starting the energy storage power station or the gas generator as backup power when the output power of the new energy power station is smaller than the power load demand specifically includes:
case 10: pNER<PLOAD，UESS>UESS_minAnd | PNER-PLOAD|≤PBAT_outWhen the current is over; preferentially selecting the energy storage power station to start and output electric energy, stopping the gas generator, stopping the plasma hydrogen production station, stopping the hydrogen and carbon monoxide separation equipment, and closing the seven pipelines; and/or
Case 11: when P is presentNER<PLOAD，UESS>UESS_min，|PNER-PLOAD|>PBAT_outAnd p1>p1_ l; preferentially selecting the energy storage power station to start and output electric energy, starting the gas generator and outputting electric energy, stopping the plasma hydrogen generation station, stopping the hydrogen and carbon monoxide separation equipment, starting the sixth pipeline, and closing the rest six pipelines; and/or
Case 12: when P is presentNER<PLOAD，UESS>UESS_min，|PNER-PLOAD|>PBAT_outAnd p1 is not more than p1_ l; preferentially selecting the energy storage power station to start and output electric energy, starting the gas generator and outputting electric energy, stopping the plasma hydrogen generation station, stopping the hydrogen and carbon monoxide separation equipment to start the seventh pipeline, and closing the rest six pipelines; and/or
Case 13: pNER<PLOAD，UESS>UESS_min，p1>P1_ l, and | PNER-PLOAD|≤PGAS_outWhen the current is over; preferentially selecting the gas generator to start and output electric energy, stopping the energy storage power station, stopping the plasma hydrogen production station, stopping the hydrogen and carbon monoxide separation equipment, starting the sixth pipeline, and closing the rest six pipelines; and/or
Case 14: pNER<PLOAD，UESS>UESS_min，p1>P1_ l, and | PNER-PLOAD|>PGAS_outWhen the current is over; preferentially selecting the gas generator to start and output electric energy, the energy storage power station to start and output electric energy, the plasma hydrogen generation station to stop working, the hydrogen and carbon monoxide separation equipment to stop working, the sixth pipeline to be started, and the rest six pipelines to be closed; and/or
Case 15: when P is presentNER<PLOAD，UESS≤UESS_minAnd p1>p1_ l; the gas generator is started and outputs electric energy, the energy storage power station stops working, the plasma hydrogen generation station stops working, the hydrogen and carbon monoxide separation equipment stops working, the sixth pipeline is started, and the rest six pipelines are closed; and/or
Case 16: when P is presentNER<PLOAD，UESS≤UESS_minAnd p1 is not more than p1_ l; the gas generator is started and outputs electric energy, the energy storage power station stops working, the plasma hydrogen production station stops working, the hydrogen and carbon monoxide separation equipment stops working, the seventh pipeline is opened, and the rest six pipelines are closed, wherein
PLOAD(ii) is the electrical energy load demand;
PNERthe output power of the new energy power station is obtained;
PBAT_outoutputting electric energy power for the energy storage power station;
PGAS_outoutputting electric energy power for the gas generator;
UESSis the electric quantity value, U, of the energy storage power stationESS_minThe lower limit value of the electric quantity of the energy storage power station is set;
p1 is the pressure value of the first air storage tank, and p1_ l is the lower pressure threshold value of the first air storage tank.
In a third aspect, the present invention provides a hydrogen-electricity coupled new energy system, including: the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, a gas generator, natural gas equipment, a first gas storage tank and a second gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with the first gas storage tank through a first pipeline and provides a gas source for the first gas storage tank;
the plasma hydrogen generation station is connected with the second gas storage tank through a second pipeline, and the second gas storage tank provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen generation station is connected with a natural gas pipe network through a second pipeline, and the natural gas pipe network provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the gas generator is connected with the first gas storage tank through a fourth pipeline, and the first gas storage tank provides a gas source for the gas generator;
the gas generator is connected with the second gas storage tank through a fifth pipeline and provides a gas source for the second gas storage tank;
the gas generator is connected with the power grid main line and provides standby electric energy for the new energy system;
the natural gas equipment is connected with the second gas storage tank through a sixth pipeline, and the natural gas equipment provides a gas source for the second gas storage tank station;
the natural gas equipment is connected with the natural gas pipe network through a seventh pipeline, and the natural gas pipe network provides a gas source for the natural gas equipment; wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
In a fourth aspect, the present invention provides a method for controlling a hydrogen-electricity coupled new energy system, including the following steps:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first air storage tank and the pressure of the second air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station, the gas generator and the natural gas equipment to work and controlling the seven pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank.
In a fifth aspect, the present invention provides a hydrogen-electricity coupled new energy system, including: the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, hydrogen and carbon monoxide separation equipment and a gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with a natural gas pipe network through a first pipeline, and the natural gas pipe network provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen production station is connected with the hydrogen and carbon monoxide separation equipment through a second pipeline and provides an air source for the hydrogen and carbon monoxide separation equipment;
the plasma hydrogen generation station is connected with the natural gas pipe network through a fifth pipeline and provides a gas source for the natural gas pipe network;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with the gas storage tank through a third pipeline and provides a gas source for the gas storage tank;
the hydrogen and carbon monoxide separation equipment is connected with the natural gas pipe network through a fourth pipeline and provides a gas source for the natural gas pipe network;
the hydrogen and carbon monoxide separation equipment is connected with the power grid main line and is powered by the power grid main line; wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
In a sixth aspect, the present invention provides a method for controlling a hydrogen-electricity coupled new energy system, including the following steps:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station and the pressure of the air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station and the hydrogen and carbon monoxide separation equipment to work and controlling the five pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station and the pressure of the gas storage tank.
The technical scheme of the hydrogen-electricity coupling new energy system comprises a hydrogen-electricity coupling system, a hydrogen-electricity coupling system and a fuel gas generator, wherein the hydrogen-electricity coupling system comprises a hydrogen-electricity coupling system, a hydrogen-electricity coupling system and a fuel gas generator. In addition, in the hydrogen production by using the residual electricity, methane and carbon dioxide are used as raw materials, so that a large amount of carbon dioxide greenhouse gas in the atmosphere can be consumed, and double effects of energy utilization and environmental protection are realized.
Drawings
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a first embodiment of the present invention.
Fig. 2 is a flowchart of main steps of a control method of a hydrogen-electricity coupled new energy system according to a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a second embodiment of the present invention.
Fig. 4 is a flowchart of main steps of a hydrogen-electricity coupling new energy system control method according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a third embodiment of the present invention.
Fig. 6 is a flowchart of main steps of a control method of a hydrogen-electricity coupled new energy system according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a first embodiment of the present invention. The equipment of the hydrogen-electricity coupling new energy system mainly comprises a new energy power station 11, an energy storage power station 12, a gas generator 13, a first gas storage tank 14, a plasma hydrogen generation station 15, hydrogen and carbon monoxide separation equipment 16 and a second gas storage tank 17.
The new energy power station 11 is connected with a power grid main line and provides electric energy for a new energy system. Illustratively, the new energy power station 11 may be one or a combination of new energy power stations such as wind power station, photovoltaic power station, tidal power station, and the like.
The energy storage power station 12 is connected with the main line of the power grid, and when the generated energy of the new energy system is larger than the electricity demand, the energy storage power station 12 can store the redundant electric energy of the new energy system; when the generated energy of the new energy system cannot meet the electricity demand, the energy storage power station 12 can provide standby electric energy for the new energy system. For example, the electric energy storage of the energy storage power station 12 may adopt a lithium battery technology method, or a super capacitor technology solution, or another electric energy storage material solution.
The gas generator 13 is connected with the main line of the power grid, and when the generated energy of the new energy system and/or the standby electric energy output of the energy storage power station 12 cannot meet the electricity demand, the gas generator 13 can provide standby electric energy for the new energy system.
The gas generator 13 is connected with the first gas storage tank 14 through a sixth pipeline, and meanwhile, the gas generator 13 is connected with a natural gas pipe network through a seventh pipeline; when the gas generator 13 is started, a fuel gas source is provided by the first gas storage tank 14 or the natural gas pipeline network.
In the present embodiment, the plasma hydrogen generation station 15 preferably adopts a technical solution of catalytic reforming reaction of methane and carbon dioxide, but the invention is not limited to specific catalyst, for example, NiAl hydrotalcite catalyst or CoMgAl hydrotalcite catalyst can be used, and other materials can be adopted by those skilled in the art according to practical situations. Also, the present invention is not limited to the method of generating plasma, and for example, a dielectric barrier discharge scheme, a sliding arc discharge scheme, or the like may be adopted, and those skilled in the art may also adopt other schemes according to actual situations.
The input raw materials of the plasma hydrogen production station 15 are mainly methane and carbon dioxide, and the output gas of the plasma hydrogen production station 15 is hydrogen and carbon monoxide. The methane can come from natural gas pipe network, artificial methane, etc.; the carbon dioxide can be carbon dioxide recovered from industrial waste gas or carbon dioxide collected from the atmosphere, and with the maturity of large-scale carbon dioxide capture technology and the centralized utilization of the carbon dioxide in the future, the scheme of the plasma hydrogen generation station 15 can be applied to hydrogen generation and simultaneously consume the carbon dioxide in the air, reduce greenhouse gases in the atmosphere and realize double effects of energy utilization and environmental protection.
Meanwhile, the carbon monoxide, which is an associated substance in the hydrogen production process of the plasma hydrogen production station 15, is also an important industrial raw material, and can be used for producing methanol, phosgene, organic synthesis and the like in the chemical industry; in the metallurgical industry, carbon monoxide is used as a reducing agent for reducing iron oxides in steel making blast furnaces. Therefore, the byproduct carbon monoxide of the plasma hydrogen generation station 15 can also produce certain economic benefits.
The plasma hydrogen production station 15 is connected with a main line of a power grid and is powered by the main line of the power grid; the plasma hydrogen production station 15 is connected with the first gas storage tank 14 through a first pipeline and provides a gas source for the first gas storage tank 14; the plasma hydrogen production station 15 is connected with the hydrogen-carbon monoxide separation device 16 through a third pipeline to provide a gas source for the hydrogen-carbon monoxide separation device 16.
In the use of hydrogen energy, the purity requirement of hydrogen is generally high, for example, the national standard for hydrogen for vehicles requires that the purity of hydrogen reaches 99.97%. Therefore, the system of the present invention further requires a hydrogen-carbon monoxide separation device 16, and the mixed gas of hydrogen and carbon monoxide generated by the plasma hydrogen generation station 15 is separated by the hydrogen-carbon monoxide separation device 16 to generate high-purity hydrogen and carbon monoxide as a byproduct meeting the requirements of industrial production.
The hydrogen-carbon monoxide separation device 16 is connected with a main line of a power grid and is powered by the main line of the power grid. The hydrogen-carbon monoxide separation device 16 is connected with the first gas storage tank 14 through a fourth pipeline, and is supplied with a gas source by the first gas storage tank 14, besides the gas source by the plasma hydrogen production station 15 through a third pipeline.
The hydrogen and carbon monoxide separation device 16 outputs hydrogen and is connected with a second gas storage tank 17 through a fifth pipeline, the second gas storage tank 17 stores high-purity hydrogen and provides hydrogen energy for hydrogen utilization equipment, and the hydrogen utilization equipment can be hydrogen energy power equipment, hydrogen filling stations for various purposes including serving hydrogen energy automobiles, and the like.
Meanwhile, the hydrogen output of the hydrogen-carbon monoxide separation device 16 is connected with a natural gas pipe network through a second pipeline, and redundant hydrogen can be discharged into the natural gas pipe network as fuel.
In this embodiment, the technical solution adopted by the hydrogen-carbon monoxide separation device 16 is not limited in the present invention, and for example, a pressure swing adsorption technology, a cryogenic separation technology, and the like may be adopted, and those skilled in the art may also adopt other solutions according to actual situations.
Continuing with fig. 2, fig. 2 is a flowchart illustrating main steps of a control method of a hydrogen-electricity coupling new energy system according to a first embodiment of the present invention. As shown in fig. 2, the control method of the present invention includes:
step S201: acquiring the electric energy load demand, the output power of a new energy power station, the electric quantity of an energy storage power station, the pressure of a first air storage tank and the pressure of a second air storage tank;
step S202: according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank, the energy storage power station, the plasma hydrogen generation station, the gas generator and the hydrogen and carbon monoxide separation equipment are controlled to work, and the opening and closing of seven pipelines of the system are controlled.
In step S201, the method for acquiring the system related data, such as the electric energy load demand, the output power of the new energy power station 11, the electric quantity of the energy storage power station 12, the pressure of the first air storage tank 14, the pressure of the second air storage tank 17, and the like, is well known in the art, and a person skilled in the art can select an appropriate method according to actual conditions to implement the method. As an example, the load demand of the electric energy load can be obtained by an electric power calculation method of the phase shift network; or the sensor arranged on the system equipment is used for acquiring the related data such as the electric quantity of the energy storage power station, the pressure of the gas storage tank and the like.
It should be noted that the load requirement also includes electric energy required by the operation of the plasma hydrogen generation station 15, the hydrogen-carbon monoxide separation device 16, the first gas storage tank 14, the second gas storage tank 17, and the like in the system.
Before explaining step S202, the following explanation will be given on the relevant symbols:
PLOADis the demand of the electric energy load;
PNERthe output power of the new energy power station;
PBAT_ininput power when storing electrical energy for an energy storage power station;
PBAT_outfor outputting electric power from energy-storage power station
PGASOutputting electric energy power for the gas generator;
UESSfor the value of the electric power of the energy-storing power station, UESS_minFor lower limit threshold of electric quantity of energy-storage power station, UESS_maxThe electric quantity is an upper limit threshold value of the energy storage power station;
p1 is the pressure value of the first air storage tank, p1_ l is the lower pressure limit threshold value of the first air storage tank, and p1_ h is the upper pressure limit threshold value of the first air storage tank;
p2 is the pressure value of the second air storage tank, p2_ l is the lower pressure threshold value of the second air storage tank, and p2_ h is the upper pressure threshold value of the second air storage tank.
When the output power P of the new energy power stationNERGreater than the electric energy load demand PLOADAt this time, the new energy system has a margin of electric energy, and the step S202 specifically includes the following situations.
Case 1:
when P is presentNER>PLOAD，UESS<UESS_max，p2≥p2_l，
And (P)NER-PLOAD)≤PBAT_inWhen the temperature of the water is higher than the set temperature,
at this time, the energy storage power station 12 is not fully charged, the system control preferentially charges the energy storage power station 12, and the redundant power of the system energy is all used for charging the energy storage power station 12. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the gas generator 13 stops working, the plasma hydrogen production station 15 stops working, the hydrogen and carbon monoxide separation equipment 16 stops working, and all seven pipelines are closed.
Case 2:
when P is presentNER>PLOAD，UESS<UESS_max，p2<p2_l，(PNER-PLOAD)≤PBAT_inAnd p1>p1_ l, at this time, the energy storage power station 12 is not fully charged, the pressure of the second gas storage tank 17 for storing hydrogen is lower than the lower limit value, the pressure of the first gas storage tank 14 is higher than the lower limit value, the system preferentially prepares hydrogen, the first gas storage tank 14 provides gas source for the hydrogen-carbon monoxide separation device 16, and the energy storage power station 12 is started to charge. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the hydrogen and carbon monoxide separation equipment 16 is started, the plasma hydrogen generation station 15 stops working, and the gas generator 13 stops working; and opening the fourth pipeline, opening the fifth pipeline and closing the other five pipelines.
Case 3:
when P is presentNER>PLOAD，UESS<UESS_max，p2<p2_l，(PNER-PLOAD)≤PBAT_inAnd p1 is not more than p1_ l,
at this time, the electric energy of the energy storage power station 12 is not fully charged, the pressure of the second gas storage tank 17 for storing hydrogen is lower than the lower limit value, the pressure of the first gas storage tank 14 is lower than the lower limit value, the system preferentially prepares hydrogen, the plasma hydrogen preparation station 15 provides a gas source for the hydrogen-carbon monoxide separation device 16, and the energy storage power station 12 is started to charge. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the plasma hydrogen production station 15 is started, the hydrogen and carbon monoxide separation equipment 16 is started, and the gas generator 13 stops working; and opening the third pipeline, opening the fifth pipeline and closing the other five pipelines.
Case 4:
when P is presentNER>PLOAD，UESS<UESS_max，p2>p2_l，(PNER-PLOAD)>PBAT_inAnd p1<At the time of p1 — h,
at this moment, the electric energy of the energy storage power station 12 is not full, the first gas storage tank 14 does not reach the upper pressure limit, the system controls the energy storage power station 12 to charge, and simultaneously, the plasma hydrogen generation station 15 is started, and a gas source is provided for the first hydrogen storage tank 14 through a first pipeline. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the plasma hydrogen production station 15 is started, the gas generator stops working 13, the hydrogen and carbon monoxide separation device 16 stops working, the first pipeline is started, and other six pipelines are closed.
Case 5:
when P is presentNER>PLOAD，UESS<UESS_max，p1≥p1_h，(PNER-PLOAD)>PBAT_inAnd p2<At the time of p2 — h,
at this time, the electric energy of the energy storage power station 12 is not fully charged, the first gas storage tank 14 reaches the upper pressure limit, the second gas storage tank 17 does not reach the upper pressure limit, the system controls the energy storage power station 12 to charge, and meanwhile, the plasma hydrogen generation station 15 and the hydrogen-carbon monoxide separation 16 equipment are started to provide a gas source for the second hydrogen storage tank 17. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the plasma hydrogen production station 15 is started, the hydrogen and carbon monoxide separation 16 equipment is started, and the gas generator 13 stops working; and opening the third pipeline, opening the fifth pipeline and closing the other five pipelines.
Case 6:
when P is presentNER>PLOAD，UESS<UESS_max，p1≥p1_h，p2≥p2_h，
And (P)NER-PLOAD)>PBAT_in，
At this time, the energy storage power station 12 is not fully charged, the first gas storage tank 14 and the second gas storage tank 17 reach the upper pressure limit, the system controls the energy storage power station 12 to charge, and simultaneously, the plasma hydrogen generation station 15, the hydrogen and carbon monoxide separation device 16 and the second pipeline are started to discharge redundant hydrogen into the natural gas pipeline. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 starts to store redundant electric energy, the plasma hydrogen production station 15 is started, the hydrogen and carbon monoxide separation equipment 16 is started, and the gas generator 13 stops working; and opening the second pipeline, opening the third pipeline and closing the other five pipelines.
Case 7:
when P is presentNER>PLOAD，UESS≥UESS_max，p2>p2_ l, and p1<At the time of p1 — h,
at this time, the energy storage power station 12 is fully charged, the first gas storage tank 14 does not reach the upper pressure limit, the system controls the energy storage power station 12 to stop charging, the plasma hydrogen generation station 15 is started, and a gas source is provided for the first hydrogen storage tank 17 through a first pipeline. The states of the devices and pipelines in the system are as follows:
starting the plasma hydrogen generation station 15, stopping the energy storage power station 12, stopping the gas generator 13, and stopping the hydrogen and carbon monoxide separation equipment 16; the first pipeline is started, and other six pipelines are closed.
Case 8:
when P is presentNER>PLOAD，UESS≥UESS_maxP1 ≧ p1_ h, and p2<At the time of p2 — h,
at this time, the electric energy of the energy storage power station 12 is fully charged, the first gas storage tank 14 reaches the upper pressure limit, the second gas storage tank 17 does not reach the upper pressure limit, the system controls the energy storage power station 12 to stop working, and simultaneously the plasma hydrogen generation station 15 and the hydrogen-carbon monoxide separation device 16 are started to provide a gas source for the second hydrogen storage tank 17. The states of the devices and pipelines in the system are as follows:
starting the plasma hydrogen production station 15, starting the hydrogen and carbon monoxide separation equipment 16, stopping the energy storage power station 12, and stopping the gas generator 13; and opening the third pipeline, opening the fifth pipeline and closing the other five pipelines.
Case 9:
when P is presentNER>PLOAD，UESS≥UESS_maxWhen p1 is not less than p1_ h and p2 is not less than p2_ h,
at this time, the energy storage power station 12 is fully charged, the first gas storage tank 14 and the second gas storage tank 17 reach the upper pressure limit, the system controls the energy storage power station 12 to stop working, the plasma hydrogen generation station 15 and the second pipeline are started, and the mixed gas of hydrogen and carbon monoxide generated by the plasma hydrogen generation station 15 is discharged into the natural gas pipeline. The states of the devices and pipelines in the system are as follows:
starting the plasma hydrogen production station 15, starting the hydrogen and carbon monoxide separation equipment 16, stopping the energy storage power station 12, and stopping the gas generator 13; and opening the second pipeline, opening the third pipeline and closing the other five pipelines.
It should be noted that, in the case of meeting the charging requirement of the energy storage power station 12 and in the case of not requiring the first gas storage tank 14 and the second gas storage tank 17 to supplement gas, in the case of cases 6 and 9, the plasma hydrogen generation station 15 and the hydrogen-carbon monoxide separation device 16 will continue to operate using surplus electric energy, the generated hydrogen gas can be mixed into a natural gas pipe network according to a certain proportion, the combustion value of natural gas can be improved, and the natural gas can be supplied to industrial production or/or municipal residents for use, and meanwhile, the produced carbon monoxide can also bring certain economic benefits, and consumes carbon dioxide in the atmosphere in the hydrogen generation process, which can simultaneously take into account economy and environmental protection.
When the output power P of the new energy power station 11NERLess than electric energy load demand PLOADAt this time, the electric energy of the new energy system is insufficient, the energy storage power station 12 and/or the gas generator 13 are required to supplement the difference of the electric energy, and the user can select to preferentially start the energy storage power station 12 or preferentially start the gas generator 13, where the step S202 specifically includes the following steps.
Case 10:
when P is presentNER<PLOAD，UESS>UESS_minAnd | PNER-PLOAD|≤PBAT_outWhen the current is over;
at this time, the system preferentially uses the electric energy output of the energy storage power station 12 to complement the electric energy difference, and the electric energy output of the energy storage power station 12 can complement the electric energy difference. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 is started and outputs electric energy, the gas generator 13 stops working, the plasma hydrogen generation station stops working 14, and the hydrogen and carbon monoxide separation equipment 16 stops working; all seven pipes were closed.
Case 11:
when P is presentNER<PLOAD，UESS>UESS_min，|PNER-PLOAD|>PBAT_outAnd p1>p1_ l;
at this time, the electric energy output of the energy storage power station 12 cannot compensate the electric energy difference, the gas generator 13 is started to further compensate the shortage of the electric energy, and when the air pressure of the first air storage tank 14 is higher than the lower limit threshold, the first air storage tank 14 provides the origin for the gas generator 13. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 is started and outputs electric energy, the gas generator 13 is started and outputs electric energy, the plasma hydrogen generation station 15 stops working, and the hydrogen and carbon monoxide separation equipment 16 stops working; and opening the sixth pipeline, and closing the other six pipelines.
Case 12:
when P is presentNER<PLOAD，UESS>UESS_min，|PNER-PLOAD|>PBAT_outAnd p1 is not more than p1_ l;
at this time, the electric energy output of the energy storage power station 12 cannot complement the electric energy difference, the gas generator 13 is started to further complement the shortage of the electric energy, and when the air pressure of the first air storage tank 14 is lower than the lower threshold, the natural gas pipe network provides origin for the gas generator 13. The states of the devices and pipelines in the system are as follows:
the energy storage power station 12 is started and outputs electric energy, the gas generator 13 is started and outputs electric energy, the plasma hydrogen generation station 15 stops working, and the hydrogen and carbon monoxide separation equipment 16 stops working; and opening a seventh pipeline and closing the other six pipelines.
Case 13: pNER<PLOAD，UESS>UESS_min，p1>P1_ l, and | PNER-PLOAD|≤PGAS_outWhen the current is over;
at this time, the electric energy output of the energy storage power station 12 cannot compensate the electric energy difference, and when the air pressure of the first air storage tank 14 is higher than the lower limit threshold, the gas generator 13 is preferentially started to compensate the shortage of the electric energy. The states of the devices and pipelines in the system are as follows:
preferentially selecting the gas generator 12 to start and output electric energy, stopping the energy storage power station 12, stopping the plasma hydrogen production station 15, stopping the hydrogen and carbon monoxide separation equipment 16, starting the sixth pipeline, and closing other six pipelines.
Case 14: pNER<PLOAD，UESS>UESS_min，p1>P1_ l, and | PNER-PLOAD|>PGAS_outWhen the current is over;
at this time, the electric energy output of the energy storage power station 13 cannot complement the electric energy difference, when the air pressure of the first air storage tank 14 is higher than the lower limit threshold, the gas generator 13 is preferentially started to supplement the shortage of the electric energy, and when the electric energy output by the gas generator cannot complement the electric energy difference, the energy storage power station is started to further supplement the electric energy difference. The states of the devices and pipelines in the system are as follows:
preferentially selecting the gas generator 13 to start and output electric energy, the energy storage power station 12 to start and output electric energy, the plasma hydrogen generation station 15 to stop working, the hydrogen and carbon monoxide separation equipment 16 to stop working, starting the sixth pipeline and closing other six pipelines.
Case 15:
when P is presentNER<PLOAD，UESS≤UESS_minAnd p1>p1_ l;
at this time, the stored electric quantity of the energy storage power station 12 is not greater than the electric quantity threshold lower limit, only the gas generator 13 is started to complement the electric energy difference, and when the air pressure of the first air storage tank 14 is higher than the lower limit threshold, the first air storage tank 14 provides origin for the gas generator 13. The states of the devices and pipelines in the system are as follows:
the gas generator 13 is started and outputs electric energy, the energy storage power station 12 stops working, the plasma hydrogen production station 15 stops working, and the hydrogen and carbon monoxide separation equipment 16 stops working; and opening the sixth pipeline, and closing the other six pipelines.
Case 16:
when P is presentNER<PLOAD，UESS≤UESS_minAnd p1 is not more than p1_ l;
at this time, the electric quantity stored in the energy storage power station 12 is not greater than the electric quantity threshold lower limit, only the gas generator 13 is started to complement the electric energy difference, and when the air pressure of the first air storage tank 14 is lower than the lower limit threshold, the natural gas pipe network provides origin for the gas generator 13. The states of the devices and pipelines in the system are as follows:
the gas generator 13 is started and outputs electric energy, the energy storage power station 12 stops working, the plasma hydrogen production station 15 stops working, and the hydrogen and carbon monoxide separation equipment 16 stops working; and opening a seventh pipeline and closing the other six pipelines.
It should be noted that, in the system control method, the energy storage power station or the gas generator is selected to be started preferentially, and a user can comprehensively measure and calculate the whole cost according to the purchase, installation, operation and maintenance and other costs of the energy storage power station and the gas generator when designing the system, so that the rated power of the energy storage power station and the rated power of the gas generator are configured reasonably, and the system cost is reduced under the condition of meeting the power consumption requirement.
It should be noted that the device for opening or closing the pipeline in the system and the control method thereof are well known in the art, and those skilled in the relevant art can select an appropriate scheme to implement the method according to actual situations. As an example, the switching control of the pipeline may be implemented by using a solenoid valve, a motor valve, or the like.
In an embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a second embodiment of the present invention. The equipment of the hydrogen-electricity coupling new energy system shown in fig. 3 mainly comprises a new energy power station 31, an energy storage power station 32, a natural gas equipment 33, a second gas storage tank 34, a plasma hydrogen generation station 35, a first gas storage tank 36 and a gas generator 37.
The new energy power station 31 is connected with a main line of the power grid to provide electric energy for the new energy system.
The energy storage power station 32 is connected with the main line of the power grid, and when the generated energy of the new energy system is larger than the electricity demand, the energy storage power station 32 can store the redundant electric energy of the new energy system; when the generated energy of the new energy system cannot meet the power demand, the energy storage power station 32 can provide standby electric energy for the new energy system.
The natural gas plant 33 originates from a natural gas pipeline network via a seventh pipeline and the carbon dioxide produced by combustion is fed via a sixth pipeline to a second storage tank 34.
The plasma hydrogen production station 35 is connected with the second gas storage tank 34 through a second pipeline, and a carbon dioxide gas source is provided by the second gas storage tank 34; the plasma hydrogen generation station 35 is connected with a natural gas pipe network through a third pipeline, and a methane gas source is provided by the natural gas pipe network.
The mixed gas of hydrogen and carbon monoxide output from the plasma hydrogen generation station 35 is sent to a first gas storage tank 36 through a first pipeline.
The gas generator 37 is connected to the main line of the power grid, and when the generated energy of the new energy system and/or the standby electric energy output of the energy storage power station 32 cannot meet the demand of the power consumption, the gas generator 37 can provide standby electric energy for the new energy system.
The gas generator 37 is connected with the first gas storage tank 36 through a fourth pipeline, and meanwhile, the gas generator 37 is connected with the second gas storage tank 34 through a fifth pipeline; when the gas generator 37 is started, a fuel gas source is provided by the first gas storage tank 36, and carbon dioxide generated when the gas generator 37 is operated can be stored in the second gas storage tank 34 through a fifth pipeline.
Continuing with fig. 4, fig. 4 is a flowchart illustrating main steps of a hydrogen-electricity coupling new energy system control method according to a second embodiment of the present invention. As shown in fig. 4, the control method of the present invention includes:
step S401, acquiring an electric energy load demand, output power of a new energy power station, electric quantity of an energy storage power station, pressure of a first air storage tank and pressure of a second air storage tank;
step S402, controlling the energy storage power station, the plasma hydrogen generation station, the gas generator and the natural gas equipment to work and controlling the seven pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank.
In one embodiment of the hydrogen-electricity coupled new energy system of the second embodiment, the output power of the new energy power station 31 is greater than the electric energy load demand, and the system has surplus electricity, at which time the gas generator 37 stops operating.
Case 1: when the electric quantity of the energy storage power station 32 is smaller than the electric quantity upper limit threshold value, the energy storage power station 32 is started to start charging, redundant electric energy is completely used for charging the energy storage power station 32, the plasma hydrogen generation station 35 and the gas generator 37 stop working at the moment, and the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline are all closed.
Case 2: when the energy storage power station 32 does not need to be charged or the energy storage power station 32 is charged and simultaneously has residual electricity; the pressure of the first gas tank 36 is checked and if the pressure of the first gas tank 36 is less than the upper pressure threshold of the first gas tank 36, the plasma hydrogen generation station 35 starts replenishing the first gas tank 36 with a gas source through the first pipe.
It should be noted that, as long as industrial production exists, the natural gas equipment 33 is only required to work, and when the air pressure of the second gas storage tank 34 is smaller than the upper limit air pressure threshold of the second gas storage tank 34, the sixth pipeline can be opened at any time to supplement the air source for the second gas storage tank 34.
In another implementation of the hydrogen-electricity coupled new energy system of the second embodiment, the output power of the new energy power station 31 is less than the electric energy load demand.
Case 3: when the electric quantity of the energy storage power station 32 is larger than the electric quantity lower limit threshold value, the energy storage power station 32 starts to output electric energy, and the output electric energy can complement the electric energy difference value.
Case 4: when the electric quantity of the energy storage power station 32 is greater than the electric quantity lower limit threshold, the energy storage power station 32 starts to output electric energy, but the output electric energy cannot complement the electric energy difference, and the gas generator 37 needs to be started at the same time. When the air pressure of the first air storage tank 36 is larger than the lower limit air pressure threshold, the fourth pipeline is started, and the gas generator 36 is started to supplement electric energy; the plasma hydrogen generation station 35 is closed, the first pipeline, the second pipeline and the third pipeline are all closed, when the air pressure of the second gas storage tank 34 is smaller than the upper limit of the air pressure of the second gas storage tank 34, the fifth pipeline is opened, and carbon dioxide generated by the gas generator 37 is discharged into the second gas storage tank 34 to serve as an air source of the plasma hydrogen generation station 35.
Case 5: when the electric quantity of the energy storage power station 32 is smaller than the electric quantity lower limit threshold value, the energy storage power station 32 is closed, and the gas generator 37 needs to be opened. When the air pressure of the first air storage tank 36 is smaller than the air pressure lower limit threshold, the plasma hydrogen generation station 35 is started, at this time, the first pipeline, the second pipeline and the third pipeline are all opened, and the air source generated by the plasma hydrogen generation station 35 is directly sent to the gas generator 37 for use; when the air pressure of the second air storage tank 34 is smaller than the upper limit of the air pressure of the second air storage tank 34, the fifth pipeline is opened, and the carbon dioxide generated by the gas generator 37 is discharged into the second air storage tank 34 as the air source of the plasma hydrogen generation station 35.
The new energy system shown in fig. 3 is mainly used for providing stable electric energy. The carbon dioxide is mainly from industrial production taking burning natural gas as a main energy source, such as a high-temperature smelting industry, and the natural gas equipment can be an industrial kiln furnace and the like. By the system shown in fig. 3, the new energy power station 31 is used to supply power to the plasma hydrogen generation station 35, the plasma hydrogen generation station 35 can consume a large amount of carbon dioxide generated in industrial production and/or gas generator, zero carbon emission is achieved, hydrogen and carbon monoxide gas generated by the plasma hydrogen generation station 35 can be used as fuel for the gas generator 37 of the power grid standby power generation equipment, and carbon dioxide generated by combustion of the gas generator 37 is recycled and continuously supplied to the plasma hydrogen generation equipment 35. Therefore, the system shown in fig. 3 is environment-friendly, and can effectively utilize new energy, thereby realizing deep coupling and fusion of hydrogen and electricity.
In an embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of a hydrogen-electricity coupled new energy system according to a third embodiment of the present invention, and the devices of the hydrogen-electricity coupled new energy system mainly include a new energy power station 51, an energy storage power station 52, a plasma hydrogen generation station 53, a hydrogen-carbon monoxide separation device 54, and a gas storage tank 55.
The new energy power station 51 is connected to a main line of the power grid to supply electric energy to the new energy system.
The energy storage power station 52 is connected with the main line of the power grid, and when the generated energy of the new energy system is larger than the electricity demand, the energy storage power station 52 can store the redundant electric energy of the new energy system; when the generated energy of the new energy system cannot meet the power demand, the energy storage power station 52 may provide standby power for the new energy system.
The plasma hydrogen production station 53 is connected with a main line of a power grid and is powered by the main line of the power grid; the plasma hydrogen generation station 53 is connected with a natural gas pipe network through a first pipeline, and a methane gas source is provided by the natural gas pipe network. The carbon dioxide gas as another gas source of the plasma hydrogen generation station 53 is preferably obtained from carbon dioxide waste gas generated by burning natural gas, coal, petroleum and the like in industrial and mining enterprises, and can also be obtained from other carbon dioxide collecting devices.
The mixed gas of the product hydrogen and carbon monoxide of the plasma hydrogen production station 53 is mainly provided for the hydrogen-carbon monoxide separation device 54 to be originated through a second pipeline; when the hydrogen-carbon monoxide separation device 54 does not need to work and the energy system has surplus electricity, the plasma hydrogen generation station 53 can continue to work, and the generated mixed gas of hydrogen and carbon monoxide can be discharged into a natural gas pipeline as fuel.
The hydrogen and carbon monoxide separation device 54 can separate hydrogen from carbon monoxide, and the separated hydrogen is sent to the gas storage tank 55 through a third pipeline to be used as hydrogen energy to provide fuel for the hydrogen utilization device. After the pressure of the gas storage tank 55 reaches the upper pressure limit, the hydrogen generated by the hydrogen-carbon monoxide separation device 54 may be discharged into the natural gas network through the fourth pipeline. Meanwhile, carbon monoxide produced by the hydrogen carbon monoxide separation apparatus 54 is an important raw material for industrial production.
Continuing with fig. 6, fig. 6 is a flowchart illustrating main steps of a control method of a hydrogen-electric coupling new energy system according to a third embodiment of the present invention. As shown in fig. 6, the control method of the present invention includes:
step S601: acquiring the electric energy load demand, the output power of a new energy power station, the electric quantity of an energy storage power station and the pressure of an air storage tank;
step S602: and controlling the energy storage power station, the plasma hydrogen generation station and the hydrogen and carbon monoxide separation equipment to work and controlling the five pipelines of the system to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station and the pressure of the gas storage tank.
In one embodiment of the hydrogen-electricity coupled new energy system of the third embodiment, hydrogen production is performed by using the surplus electricity of the new energy system, and the output power of the new energy power station 51 is greater than the electric energy load demand.
Case 1: when the electric quantity of the energy storage power station 52 is smaller than the electric quantity upper limit threshold value, the energy storage power station 52 is started to start charging, redundant electric energy is completely used for charging the energy storage power station 52, the plasma hydrogen generation station 53 and the hydrogen and carbon monoxide separation equipment 54 stop working at the moment, and the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline are all closed.
Case 2: when the energy storage power station 52 does not need to be charged or the energy storage power station 52 is charged and simultaneously has residual electricity, the air pressure of the air storage tank 55 is smaller than the air pressure upper limit threshold of the air storage tank 55; at this time, it is necessary to prepare hydrogen, turn on the plasma hydrogen preparation station 53, turn on the hydrogen-carbon monoxide separation device 54, turn on the first, second, and third pipelines, and turn off the fourth and fifth pipelines.
Case 3: when the energy storage power station 52 does not need to be charged or the energy storage power station 52 is charged and simultaneously has residual electricity, the air pressure of the air storage tank 55 is not less than the air pressure upper limit threshold of the air storage tank 55; in this case, hydrogen gas production is not required. At this time, according to actual conditions, the plasma hydrogen production station 53 is started, the hydrogen and carbon monoxide separation device 54 is started, the first pipeline and the second pipeline are started, the third pipeline and the fifth pipeline are closed, the fourth pipeline is started at the same time, and redundant hydrogen is discharged into a natural gas pipe network; or the plasma hydrogen production station 53 is started, the hydrogen and carbon monoxide separation device 54 is closed, the first pipeline is started, the second pipeline, the third pipeline and the fourth pipeline are closed, the fifth pipeline is started simultaneously, and redundant hydrogen and carbon dioxide are discharged into the natural gas pipeline network.
In another implementation manner of the hydrogen-electricity coupled new energy system of the second embodiment, the output power of the new energy power station 51 is smaller than the electric energy load demand, the energy storage power station 52 is started to supplement the electric energy difference, at this time, the plasma hydrogen generation station 53 and the hydrogen-carbon monoxide separation device 54 stop working, and the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the fifth pipeline are all closed.
By the system shown in fig. 5, the new energy power station 51 is used to supply power to the plasma hydrogen generation station 53 and the hydrogen-carbon monoxide separation device 54, and the remaining power is used to generate hydrogen. The plasma hydrogen production station 53 can consume a large amount of carbon dioxide generated in industrial and mining enterprises and/or resident lives, and reduce the emission of greenhouse gases; the plasma hydrogen generation station 53 and the hydrogen-carbon monoxide separation device 54 mix the hydrogen generated by the surplus electricity into the natural gas pipe network, thereby improving the combustion efficiency of the natural gas. Therefore, the system shown in fig. 5 is environment-friendly, and can effectively utilize new energy, so that the hydrogen-electricity deep coupling and fusion are realized.
Those of skill in the art will appreciate that the method steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of electronic hardware and software. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It should be noted that the terms "first," "second," "third," and the like in the description and in the claims, and in the drawings, are used for distinguishing between similar elements and not necessarily for describing or implying any particular order or sequence. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that in the description of the present application, the term "a and/or B" indicates all possible combinations of a and B, such as a alone, B alone, or a and B.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A hydrogen-electric coupling new energy system, the system comprising: the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, a gas generator, hydrogen and carbon monoxide separation equipment, a first gas storage tank and a second gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with the first gas storage tank through a first pipeline and provides a gas source for the first gas storage tank;
the plasma hydrogen production station is connected with the hydrogen and carbon monoxide separation equipment through a third pipeline and provides an air source for the hydrogen and carbon monoxide separation equipment;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with a natural gas pipe network through a second pipeline, and the hydrogen and carbon monoxide separation equipment provides a gas source for the natural gas pipe network;
the hydrogen and carbon monoxide separation equipment is connected with the first gas storage tank through a fourth pipeline, and the first gas storage tank provides a gas source for the hydrogen and carbon monoxide separation equipment;
the hydrogen and carbon monoxide separation equipment is connected with the second gas storage tank through a fifth pipeline and provides a gas source for the second gas storage tank;
the gas generator is connected with the first gas storage tank through a sixth pipeline, and the first gas storage tank provides a gas source for the gas generator;
the gas generator is connected with the natural gas pipe network through a seventh pipeline, and the natural gas pipe network provides a gas source for the gas generator;
the gas generator is connected with the power grid main line and provides standby electric energy for the new energy system, wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
2. A control method of the hydrogen-electricity coupled new energy system according to claim 1, comprising the steps of:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first air storage tank and the pressure of the second air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station, the gas generator and the hydrogen and carbon monoxide separation equipment to work and controlling the seven pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank.
3. The method for controlling the hydrogen-electricity coupled new energy system according to claim 2, wherein the step S2 specifically includes:
case 1: when P is presentNER＞PLOAD，UESS＜UESS_maxP2 > P2_ l, and (P)NER-PLOAD)≤PBAT_inWhen the power station is started to store redundant electric energy, the gas generator stops working, the plasma hydrogen generation station stops working, the hydrogen and the carbon monoxide stop working, and all the seven pipelines are closed; and/or
Case 2: when P is presentNER＞PLOAD，UESS＜UESS_max，p2＜p2_l，(PNER-PLOAD)≤PBAT_inWhen p1 is larger than p1_ l, the energy storage power station starts to store redundant electric energy, the hydrogen and carbon monoxide separation equipment is started, the plasma hydrogen generation station stops working, and the gas generator stops working; opening the fourth pipeline, opening the fifth pipeline, and closing the other five pipelines(ii) a And/or
Case 3: when P is presentNER＞PLOAD，UESS＜UESS_max，p2＜p2_l，(PNER-PLOAD)≤PBAT_inAnd when p1 is not more than p1_ l, the energy storage power station starts to store redundant electric energy, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, and the gas generator stops working; opening the third pipeline, opening the fifth pipeline, and closing the other five pipelines; and/or
Case 4: when P is presentNER＞PLOAD，UESS＜UESS_max，p2＞p2_l，(PNER-PLOAD)＞PBAT_inAnd when p1 is less than p1 — h, the energy storage power station starts to store redundant electric energy, the plasma hydrogen generation station is started, the gas generator stops working, the hydrogen and carbon monoxide separation equipment stops working, the first pipeline is started, and the other six pipelines are closed; and/or
Case 5: when P is presentNER＞PLOAD，UESS＜UESS_max，p1≥p1_h，(PNER-PLOAD)＞PBAT_inAnd when p2 is less than p2 — h, the energy storage power station starts to store redundant electric energy, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the third pipeline is started, the fifth pipeline is started, and other five pipelines are closed; and/or
Case 6: when P is presentNER＞PLOAD，UESS＜UESS_maxP1 ≧ P1_ h, P2 ≧ P2_ h, and (P)NER-PLOAD)＞PBAT_inWhen the power station is started to store redundant electric energy, the plasma hydrogen production station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the second pipeline is started, the third pipeline is started, and the other five pipelines are closed; and/or
Case 7: when P is presentNER＞PLOAD，UESS≥UESS_maxP2 > p2_ l, and p1 < p1_ h, starting the plasma hydrogen generation station, stopping the energy storage power station, stopping the gas generator, stopping the hydrogen and carbon monoxide separation equipment, starting the first pipeline, and closing the other six pipelines; and/or
Case 8: when P is presentNER＞PLOAD，UESS≥UESS_maxWhen p1 is more than or equal to p1_ h and p2 is more than p2_ h, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, the gas generator stops working, the energy storage power station stops working, the third pipeline is started, the fifth pipeline is started, and other five pipelines are closed; and/or
Case 9: when P is presentNER＞PLOAD，UESS≥UESS_maxWhen p1 is not less than p1_ h and p2 is not less than p2_ h, the plasma hydrogen generation station is started, the hydrogen and carbon monoxide separation equipment is started, the energy storage power station stops working, the gas generator stops working, the second pipeline is started, the third pipeline is started, and the other five pipelines are closed; wherein the content of the first and second substances,
PLOAD(ii) is the electrical energy load demand;
PNERthe output power of the new energy power station is obtained;
PBAT_ininput power when storing electrical energy for the energy storage power station;
UESSis the electric quantity value, U, of the energy storage power stationESS_maxThe electric quantity is the upper limit threshold value of the energy storage power station;
p1 is the pressure value of the first air storage tank, p1_ l is the lower pressure threshold value of the first air storage tank, and p1_ h is the upper pressure threshold value of the first air storage tank;
p2 is the pressure value of the second air storage tank, p2_ l is the lower pressure threshold value of the second air storage tank, and p2_ h is the upper pressure threshold value of the second air storage tank.
4. The method for controlling the hydrogen-electricity coupled new energy system according to claim 2, wherein the step S2 further includes:
and when the output power of the new energy power station is smaller than the electric energy load demand, selectively and preferentially starting the energy storage power station or the gas generator to serve as standby electric energy.
5. The control method of the hydrogen-electricity coupled new energy system according to claim 6, wherein the step of selectively and preferentially starting the energy storage power station or the gas generator as backup power when the output power of the new energy power station is smaller than the power load demand specifically comprises:
case 10: pNER＜PLOAD，UESS＞UESS_minAnd | PNER-PLOAD|≤PBAT_outWhen the current is over; preferentially selecting the energy storage power station to start and output electric energy, stopping the gas generator, stopping the plasma hydrogen production station, stopping the hydrogen and carbon monoxide separation equipment, and closing the seven pipelines; and/or
Case 11: when P is presentNER＜PLOAD，UESS＞UESS_min，|PNER-PLOAD|＞PBAT_outAnd p1 > p1_ l; preferentially selecting the energy storage power station to start and output electric energy, starting the gas generator and outputting electric energy, stopping the plasma hydrogen generation station, stopping the hydrogen and carbon monoxide separation equipment, starting the sixth pipeline, and closing the rest six pipelines; and/or
Case 12: when P is presentNER＜PLOAD，UESS＞UESS_min，|PNER-PLOAD|＞PBAT_outAnd p1 is not more than p1_ l; preferentially selecting the energy storage power station to start and output electric energy, starting the gas generator and outputting electric energy, stopping the plasma hydrogen generation station, stopping the hydrogen and carbon monoxide separation equipment to start the seventh pipeline, and closing the rest six pipelines; and/or
Case 13: pNER＜PLOAD，UESS＞UESS_minP1 > P1_ l, and | PNER-PLOAD|≤PGAS_outWhen the current is over; preferentially selecting the gas generator to start and output electric energy, stopping the energy storage power station, stopping the plasma hydrogen production station, stopping the hydrogen and carbon monoxide separation equipment, starting the sixth pipeline, and closing the rest six pipelines; and/or
Case 14: pNER＜PLOAD，UESS＞UESS_minP1 > P1_ l, and | PNER-PLOAD|＞PGAS_outWhen the current is over; preferentially selecting the gas generator to start and output electric energy, the energy storage power station to start and output electric energy, the plasma hydrogen generation station to stop working, the hydrogen and carbon monoxide separation equipment to stop working, the sixth pipeline to be started, and the rest six pipelines to be closed; and/or
Case 15: when P is presentNER＜PLOAD，UESS≤UESS_minAnd p1 > p1_ l; the gas generator is started and outputs electric energy, the energy storage power station stops working, the plasma hydrogen generation station stops working, the hydrogen and carbon monoxide separation equipment stops working, the sixth pipeline is started, and the rest six pipelines are closed; and/or
Case 16: when P is presentNER＜PLOAD，UESS≤UESS_minAnd p1 is not more than p1_ l; the gas generator is started and outputs electric energy, the energy storage power station stops working, the plasma hydrogen production station stops working, the hydrogen and carbon monoxide separation equipment stops working, the seventh pipeline is opened, and the rest six pipelines are closed, wherein
PLOAD(ii) is the electrical energy load demand;
PNERthe output power of the new energy power station is obtained;
PBAT_outoutputting electric energy power for the energy storage power station;
PGAS_outoutputting electric energy power for the gas generator;
UESSis the electric quantity value, U, of the energy storage power stationESS_minFor a lower limit of the electrical quantity of the energy storage power stationA value;
p1 is the pressure value of the first air storage tank, and p1_ l is the lower pressure threshold value of the first air storage tank.
6. A hydrogen-electric coupling new energy system, the system comprising: the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, a gas generator, natural gas equipment, a first gas storage tank and a second gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with the first gas storage tank through a first pipeline and provides a gas source for the first gas storage tank;
the plasma hydrogen generation station is connected with the second gas storage tank through a second pipeline, and the second gas storage tank provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen generation station is connected with a natural gas pipe network through a second pipeline, and the natural gas pipe network provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the gas generator is connected with the first gas storage tank through a fourth pipeline, and the first gas storage tank provides a gas source for the gas generator;
the gas generator is connected with the second gas storage tank through a fifth pipeline and provides a gas source for the second gas storage tank;
the gas generator is connected with the power grid main line and provides standby electric energy for the new energy system;
the natural gas equipment is connected with the second gas storage tank through a sixth pipeline, and the natural gas equipment provides a gas source for the second gas storage tank station;
the natural gas equipment is connected with the natural gas pipe network through a seventh pipeline, and the natural gas pipe network provides a gas source for the natural gas equipment; wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
7. A control method of the hydrogen-electricity coupled new energy system according to claim 6, comprising the steps of:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first air storage tank and the pressure of the second air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station, the gas generator and the natural gas equipment to work and controlling the seven pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station, the pressure of the first gas storage tank and the pressure of the second gas storage tank.
8. A hydrogen-electric coupling new energy system, the system comprising: the system comprises a new energy power station, an energy storage power station, a plasma hydrogen production station, hydrogen and carbon monoxide separation equipment and a gas storage tank;
the new energy power station is connected with a power grid main line and provides electric energy for a new energy system;
the energy storage power station is connected with the power grid main line, stores redundant electric energy of the new energy system and provides standby electric energy for the new energy system;
the plasma hydrogen generation station is connected with a natural gas pipe network through a first pipeline, and the natural gas pipe network provides a gas source for the plasma hydrogen generation station;
the plasma hydrogen production station is connected with the hydrogen and carbon monoxide separation equipment through a second pipeline and provides an air source for the hydrogen and carbon monoxide separation equipment;
the plasma hydrogen generation station is connected with the natural gas pipe network through a fifth pipeline and provides a gas source for the natural gas pipe network;
the plasma hydrogen production station is connected with the power grid main line and is powered by the power grid main line;
the hydrogen and carbon monoxide separation equipment is connected with the gas storage tank through a third pipeline and provides a gas source for the gas storage tank;
the hydrogen and carbon monoxide separation equipment is connected with the natural gas pipe network through a fourth pipeline and provides a gas source for the natural gas pipe network;
the hydrogen and carbon monoxide separation equipment is connected with the power grid main line and is powered by the power grid main line; wherein
The plasma hydrogen generation station adopts a methane and carbon dioxide catalytic reforming reaction method to generate hydrogen, input raw materials of the plasma hydrogen generation station comprise methane and carbon dioxide, and the output of the plasma hydrogen generation station comprises hydrogen and carbon monoxide.
9. A control method of the hydrogen-electricity coupled new energy system according to claim 8, comprising the steps of:
s1, acquiring the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station and the pressure of the air storage tank;
and S2, controlling the energy storage power station, the plasma hydrogen generation station and the hydrogen and carbon monoxide separation equipment to work and controlling the five pipelines to be opened and closed according to at least one of the electric energy load demand, the output power of the new energy power station, the electric quantity of the energy storage power station and the pressure of the gas storage tank.
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