CN120967369A

CN120967369A - Multi-energy complementary SOEC hydrogen production system and its power stability control method

Info

Publication number: CN120967369A
Application number: CN202511314099.7A
Authority: CN
Inventors: 涂正凯; 许余浩
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2025-09-15
Filing date: 2025-09-15
Publication date: 2025-11-18

Abstract

This application belongs to the field of coastal nuclear power technology, specifically disclosing a multi-energy complementary SOEC hydrogen production system and its power stability control method. Through this application, a seawater pretreatment subsystem is used to purify and pretreat coastal seawater in a coastal nuclear power scenario; an SOEC electrolysis hydrogen production subsystem is used to electrolyze the target purified seawater using an SOEC reactor with stable input power; a waste heat recovery subsystem is used to recover the current high-temperature gas and generate electricity based on the waste heat of the recovered gas; an intelligent control subsystem is used to regulate power generation based on the current power output; and a hydrogen processing and storage subsystem is used to store the current hydrogen. Through the above methods, an energy closed loop of "electrolysis-power generation-replenishment" is formed, enabling efficient synergistic utilization of multiple energy sources, thereby effectively improving the overall energy efficiency of the SOEC hydrogen production system and broadening its applicability to various scenarios.

Description

Multi-energy complementary SOEC hydrogen production system and power stable regulation and control method thereof

Technical Field

The application belongs to the technical field of coastal nuclear power, and particularly relates to a multi-energy complementary SOEC hydrogen production system and a power stable regulation method thereof.

Background

SOEC (Solid Oxide Electrolysis Cell) is a high-temperature water vapor electrolysis hydrogen production technology, has the advantages of high efficiency, low energy consumption, reversible operation and the like, and is widely favored. At present, the existing SOEC hydrogen production system depends on a power grid or a single type of renewable energy source as an energy supply mode, but because renewable energy source power generation has intermittence and fluctuation, the input power of an SOEC pile in the existing SOEC hydrogen production system is difficult to keep stable, so that the electrolysis efficiency is influenced, the stress fluctuation of the SOEC pile is easily caused, the service life is shortened, and the generated energy is further reduced. Meanwhile, a large amount of high-temperature waste heat generated in the running process of the existing SOEC hydrogen production system is simply dissipated or utilized in a low-efficiency mode. Therefore, the existing SOEC hydrogen production system has low total energy efficiency.

Disclosure of Invention

Aiming at the defects of the prior art, the application aims to provide a multi-energy complementary SOEC hydrogen production system and a power stable regulation method thereof, and aims to solve the problem of low total energy efficiency of the existing SOEC hydrogen production system.

In order to achieve the aim, the application provides a multi-energy source complementary SOEC hydrogen production system, which comprises a seawater pretreatment subsystem, an SOEC electrolytic hydrogen production subsystem, an energy source supply subsystem, a waste heat recovery subsystem, an intelligent control subsystem and a hydrogen treatment and storage subsystem, wherein the energy source supply subsystem supplies energy to the SOEC electrolytic hydrogen production subsystem;

The seawater pretreatment subsystem is used for purifying and pretreating coastal seawater in a coastal nuclear power scene to obtain target purified seawater;

the SOEC electrolysis hydrogen production subsystem is used for electrolyzing the target purified seawater through an SOEC stack to obtain current hydrogen and current high-temperature gas;

the waste heat recovery subsystem is used for recovering the current high-temperature gas and generating electricity according to the waste heat of the recovered current high-temperature gas to obtain the current generated energy;

The intelligent control subsystem is used for regulating and controlling the generating capacity according to the current generating capacity;

and the hydrogen processing and storing subsystem is used for storing the current hydrogen.

In one embodiment, the seawater pretreatment subsystem comprises a medium filtering module, an ultrafiltration membrane module, a desalting module and a deoxidizing module, wherein palladium catalyst is filled in the deoxidizing module;

The seawater pretreatment subsystem is used for purifying and pretreating coastal seawater in a coastal nuclear power scene to obtain target purified seawater, and comprises the following steps:

The medium filtering module is used for performing suspension filtering on coastal seawater in a coastal nuclear power scene;

the ultrafiltration membrane module is used for carrying out monomer filtration on the seawater along the sea after suspension filtration;

the desalination module is used for carrying out multistage reverse osmosis desalination on the seawater along the sea after the monomer filtration;

The deoxidizing module is used for carrying out dissolved oxygen removal treatment on the desalted coastal seawater to obtain target purified seawater.

In one embodiment, the energy supply subsystem comprises an electric energy supply module and a heat energy supply module, wherein the electric energy supply module comprises a photovoltaic power generation unit, a wind power generation unit and a proton exchange membrane fuel cell of a polycrystalline silicon assembly;

the step of the energy supply subsystem for supplying energy to the SOEC electrolysis hydrogen production subsystem comprises the following steps:

The photovoltaic power generation unit of the polycrystalline silicon component is used for supplying energy to the SOEC electrolysis hydrogen production subsystem by electric energy generated by photovoltaic power generation;

The wind power generation unit is used for supplying power to the SOEC electrolysis hydrogen production subsystem by using the electric energy generated by wind power generation;

The proton exchange membrane fuel cell is used for supplying power to the SOEC electrolysis hydrogen production subsystem by using the electric energy generated by the electrochemical reaction;

the heat exchanger is used for carrying out heat exchange on the purified water and cooling water of the nuclear power station;

The electric heater is used for heating the water vapor when the current temperature of the water vapor prepared by the heat exchanger is smaller than the preset working temperature, and supplying energy to the SOEC electrolysis hydrogen production subsystem according to the generated heat energy.

In one embodiment, the proton exchange membrane fuel cell comprises an air compression module, a heat-moisture exchange module and a reaction module;

The proton exchange membrane fuel cell is used for supplying power to the SOEC electrolysis hydrogen production subsystem by using the electric energy generated by electrochemical reaction, and comprises the following steps:

The air compression module is used for compressing the filtered ambient air;

the heat-moisture exchange module is used for performing heat-moisture exchange on the compressed ambient air and the outlet tail gas;

The reaction module is used for carrying out electrochemical reaction according to the ambient air after heat and humidity exchange and the current hydrogen, stabilizing the electric energy generated by the reaction, and supplying power to the SOEC electrolysis hydrogen production subsystem by the electric energy generated by the electrochemical reaction according to the electric energy after the voltage stabilization.

In one embodiment, the multi-energy source complementary SOEC hydrogen production system further comprises a hydrothermal management module;

The SOEC electrolysis hydrogen production subsystem is used for electrolyzing the target purified seawater through an SOEC stack to obtain current hydrogen and current high-temperature gas, and the SOEC electrolysis hydrogen production subsystem further comprises:

The water thermal management module is used for carrying out gas-liquid separation on the mixture after detecting that the water generated by the reaction and the unreacted gas mixture are discharged from the anode;

The water thermal management module is also used for recycling the separated liquid water to the deionized water tank, transmitting the first part of the separated gas to the SOEC electrolysis hydrogen production subsystem for anodic oxidation reaction, and transmitting the second part of the separated gas to the silencing equipment for emission.

In a second aspect, the present application provides a method for power stabilization regulation of a multi-energy complementary SOEC hydrogen production system, the method being applied to the system described in the first aspect or any possible implementation manner of the first aspect, and comprising:

Acquiring photovoltaic power generation power of a photovoltaic power generation unit of the polycrystalline silicon component, wind power generation power of a wind power generation unit and time consumption power of an SOEC electrolysis hydrogen production subsystem;

Calculating total output of renewable energy sources according to the photovoltaic power generation power and the wind power generation power;

calculating a power difference value according to the total output of the renewable energy sources and the time consumption power;

And determining a power stability regulation strategy according to a comparison result of the power difference value and a preset value, and maintaining the input power of an SOEC stack in the SOEC electrolysis hydrogen production subsystem in a stable state according to the power stability regulation strategy.

In an embodiment, the step of maintaining the input power of the SOEC stack in the SOEC electrolytic hydrogen production subsystem in a stable state according to the power stabilization regulation strategy includes:

When the fluctuation amplitude of the power difference value is larger than a target value, the lithium battery is scheduled to carry out power compensation according to the power regulation strategy advantage in a quick response stage, and meanwhile, the proton exchange membrane fuel cell is controlled to carry out slow regulation;

When the fluctuation amplitude of the power difference value is smaller than or equal to a target value, the current working power of the proton exchange membrane fuel cell is obtained;

triggering charging and discharging buffering of the lithium battery according to the power stability regulation strategy when the current working power is within a preset percentage range of rated power;

And regulating and controlling the flow of a hydrogen valve at the inlet of the proton exchange membrane fuel cell in a PID control mode according to the power stability regulation strategy when the current working power is not in the preset percentage range of the rated power so as to maintain the input power of an SOEC stack in the SOEC electrolytic hydrogen production subsystem in a stable state.

In a third aspect, the application provides an electronic device comprising at least one memory for storing a program, at least one processor for executing the program stored in the memory, the processor being adapted to perform the method of the second aspect or any one of the possible implementations of the second aspect when the program stored in the memory is executed.

In a fourth aspect, the application provides a computer readable storage medium storing a computer program which, when run on a processor, causes the processor to perform the method described in the second aspect or any one of the possible implementations of the second aspect.

In a fifth aspect, the application provides a computer program product which, when run on a processor, causes the processor to perform the method described in the second aspect or any one of the possible implementations of the second aspect.

It will be appreciated that the advantages of the second to fifth aspects may be found in the relevant description of the first aspect, and are not described here again.

In general, the above technical solutions conceived by the present application have the following beneficial effects compared with the prior art:

(1) The application takes ' multi-energy collaborative supply + high-efficiency waste heat recovery + intelligent power regulation as a core to form an energy closed loop of ' electrolysis-power generation-energy supplement ', specifically, electric energy required by the SOEC electrolysis hydrogen production subsystem for electrolysis comes from an energy supply subsystem comprising an electric energy supply module and a heat energy supply module, solar energy and wind energy are preferentially supplied, the insufficient part is dynamically supplemented by a proton exchange membrane fuel cell, the input power of an SOEC stack in the SOEC electrolysis hydrogen production subsystem is in a stable state through a power stable regulation strategy, the heat energy supply preferentially utilizes cooling water of a nuclear power plant to assist an electric heater to supplement energy as required, the generated high-temperature gas firstly recovers waste heat through Rankine cycle to generate power, and then part of hydrogen is sent into the proton exchange membrane fuel cell to serve as fuel, so that the high-efficiency collaborative utilization of nuclear power waste heat, renewable energy and hydrogen energy is realized, the total energy efficiency of the SOEC hydrogen production system is effectively improved, and the energy-saving and environment-friendly effects are achieved.

(2) The multi-energy complementary SOEC hydrogen production system also comprises a seawater pretreatment subsystem, and the source of the coastal seawater in the coastal nuclear power scene is expanded through the seawater pretreatment subsystem, so that the system can be directly applied to a wide range of coastal scenes, such as scenes of coastal hydrogen stations, hydrogen energy ships, chemical hydrogen supplementation and the like.

In summary, the system comprises a seawater pretreatment subsystem, an SOEC electrolytic hydrogen production subsystem, an energy supply subsystem, a waste heat recovery subsystem, an intelligent control subsystem and a hydrogen treatment and storage subsystem, wherein the energy supply subsystem supplies energy to the SOEC electrolytic hydrogen production subsystem, the input power of an SOEC stack in the SOEC electrolytic hydrogen production subsystem is maintained to be in a stable state through a power stability regulation strategy, the seawater pretreatment subsystem is used for purifying and pretreating coastal seawater in a coastal nuclear power scene to obtain target purified seawater, the SOEC electrolytic hydrogen production subsystem is used for electrolyzing the target purified seawater through the SOEC stack to obtain current hydrogen and current high-temperature gas, the waste heat recovery subsystem is used for recovering the current high-temperature gas and generating electricity according to the waste heat of the recovered current high-temperature gas to obtain current generated energy, the intelligent control subsystem is used for regulating and controlling the generated energy according to the current generated energy, and the hydrogen treatment and storage subsystem is used for storing the current hydrogen. Through the mode, an energy closed loop of electrolysis-power generation-energy supplement is formed, so that various energy sources are efficiently utilized cooperatively, the total energy efficiency of the SOEC hydrogen production system can be effectively improved, and the application range is wide.

Drawings

FIG. 1 is one of the flow schematic diagrams of a multi-energy source complementary SOEC hydrogen production system provided by an embodiment of the application;

FIG. 2 is a schematic flow chart of a method for regulating and controlling the power stability of a multi-energy complementary SOEC hydrogen production system according to an embodiment of the present application;

Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

The term "and/or" is used herein to describe an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, and that there may be three cases where a exists alone, while a and B exist together, and B exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., A/B indicates A or B.

The terms "first" and "second" and the like in the description and in the claims are used for distinguishing between different objects and not for describing a particular sequential order of objects. For example, the first response message and the second response message, etc. are used to distinguish between different response messages, and are not used to describe a particular order of response messages.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Based on this, the embodiment of the application provides a multi-energy complementary SOEC hydrogen production system, and referring to fig. 1, fig. 1 is one of the flow schematic diagrams of the multi-energy complementary SOEC hydrogen production system provided by the embodiment of the application. In the embodiment, the multi-energy complementary SOEC hydrogen production system 01 comprises a seawater pretreatment subsystem 10, a SOEC electrolytic hydrogen production subsystem 20, an energy supply subsystem 30, a waste heat recovery subsystem 40, an intelligent control subsystem 50 and a hydrogen treatment and storage subsystem 60, wherein the energy supply subsystem 30 supplies energy to the SOEC electrolytic hydrogen production subsystem 20, and the input power of a SOEC stack in the SOEC electrolytic hydrogen production subsystem 20 is maintained in a stable state through a power stabilization regulation strategy:

The seawater pretreatment subsystem 10 is used for carrying out purification pretreatment on coastal seawater in a coastal nuclear power scene to obtain target purified seawater.

It should be noted that, the coastal nuclear power scenario includes, but is not limited to, the scenario of coastal hydrogen station, hydrogen energy ship, chemical hydrogen supplementing, etc., the target purified seawater is the seawater after the purification pretreatment of the coastal seawater in the coastal nuclear power scenario by the seawater pretreatment subsystem 10, where the coastal seawater in the coastal nuclear power scenario may be obtained by a water pump, and the purification pretreatment includes, but is not limited to, suspension filtration, monomer filtration, multistage reverse osmosis desalination, dissolved oxygen removal treatment, etc.

Further, the seawater pretreatment subsystem 10 comprises a medium filtering module, an ultrafiltration membrane module, a desalination module and a deoxidization module, wherein palladium catalyst is filled in the deoxidization module, the seawater pretreatment subsystem 10 is used for purifying and pretreating coastal seawater in coastal nuclear power scenes to obtain target purified seawater, the seawater pretreatment subsystem comprises the medium filtering module used for carrying out suspension filtration on the coastal seawater in the coastal nuclear power scenes, the ultrafiltration membrane module used for carrying out monomer filtration on the suspension-filtered coastal seawater, the desalination module used for carrying out multistage reverse osmosis desalination on the monomer-filtered coastal seawater, and the deoxidization module used for carrying out de-dissolved oxygen treatment on the desalted coastal seawater to obtain the target purified seawater.

It is understood that the medium filter module can be a medium filter, the filter material adopts the combination of quartz sand and active carbon, so that the filtering precision reaches 5 mu M, the coastal seawater in coastal nuclear power scenes can be subjected to suspension filtration through the medium filter module to achieve the purpose of removing suspended matters, the ultrafiltration membrane module can be an ultrafiltration membrane module, PVDF (polyvinylidene fluoride) materials are adopted, the molecular cut-off reaches 100kDa, the suspended and filtered coastal seawater can be subjected to monomer filtration through the ultrafiltration membrane module to achieve the purpose of removing colloid and microorganism, the desalination module can be a two-stage reverse osmosis desalination device, the single-stage filtered coastal seawater can be subjected to multistage reverse osmosis desalination through the desalination module, so that the salinity is reduced to below 5mg/L, the resistivity of the desalted coastal seawater is greater than 15MΩ cm, the deoxidization module can be a deoxidization tower filled with palladium catalyst, the purpose of removing dissolved oxygen in water can be achieved through the deoxidization module, the dissolved oxygen content in the coastal seawater is reduced to below 0.1ppm, and finally the seawater is stored in a stainless steel water tank.

The SOEC electrolysis hydrogen production subsystem 20 is used for electrolyzing the target purified seawater through an SOEC stack to obtain current hydrogen and current high-temperature gas.

It will be appreciated that the SOEC electrolytic hydrogen production subsystem 20 comprises a SOEC stack and a shell-and-tube steam generator, wherein the SOEC stack has a rated power of 1.2MW, can be composed of 100 single cells with an active area of 200 square centimeters, has an operating temperature of 750 ℃ and a pressure of 0.3MPa, can be designed in an inner string manner, has a bipolar plate made of stainless steel 316L and is plated on the surfaceThe coating, the cathode adopts Ni-YSZ metal ceramic, the anode adopts LSM-YSZ composite material, and the electrolyte is 8YSZ material; the heat exchange area of the shell and tube steam generator reaches 50 square meters.

It should be appreciated that for the SOEC electrolytic hydrogen production subsystem 20, after the target purified seawater is obtained, a shell and tube steam generator is used to prepare steam, and after the steam enters the electrolysis module in the SOEC electrolytic hydrogen production subsystem 20, the water electrolysis process occurs under the energy supply of the energy supply subsystem 30, so as to achieve the purpose of preparing hydrogen. The current high temperature gas refers to the tail gas produced during the hydrogen production process, where the high temperature may be 700 ℃.

Further, the energy supply subsystem 30 comprises an electric energy supply module and a heat energy supply module, wherein the electric energy supply module comprises a photovoltaic power generation unit, a wind power generation unit and a proton exchange membrane fuel cell 70 of a polycrystalline silicon assembly, the heat energy supply module comprises a heat exchanger and an electric heater, the energy supply subsystem 30 supplies power to the SOEC electrolysis hydrogen production subsystem 20, the energy supply module comprises the photovoltaic power generation unit of the polycrystalline silicon assembly, the wind power generation unit, the proton exchange membrane fuel cell 70, the heat exchanger and the electric heater, the electric heater is used for heating the water vapor when the current temperature of the water vapor prepared by the heat exchanger is lower than the preset working temperature, the wind power generation unit is used for supplying power to the SOEC electrolysis hydrogen production subsystem 20, the electric power generation unit is used for supplying power to the SOEC electrolysis hydrogen production subsystem 20 by the electric energy generated by wind power generation, the proton exchange membrane fuel cell 70 is used for supplying power to the SOEC electrolysis hydrogen production subsystem 20 by the electric energy generated by electrochemical reaction, the heat exchanger is used for carrying out heat exchange on purified water and cooling water of a nuclear power station, and the electric heater is used for supplying heat to the SOEC hydrogen production subsystem 20 according to the generated current temperature of the water vapor prepared by the heat exchanger is lower than the preset working temperature.

It should be noted that, in order to stably supply power to the SOEC electrolytic hydrogen production subsystem 20, the present embodiment proposes the power supply subsystem 30 including the power supply module and the thermal energy supply module, and utilizes solar energy, wind energy and dynamic complementary power supply of proton exchange membrane fuel cells (Proton Exchange Membrane Fuel Cell, PEMFC). The photovoltaic power generation unit of the polycrystalline silicon component is provided with a 1MWp photovoltaic power generation system, and the wind power generation unit is provided with a 1.5MW wind power generator, wherein the photovoltaic power generation unit of the polycrystalline silicon component supplies power for the SOEC electrolysis hydrogen production subsystem 20 by using electric energy generated by photovoltaic power generation, and the wind power generation unit supplies power for the SOEC electrolysis hydrogen production subsystem 20 by using electric energy generated by wind power generation. The rated power of the cell stack of the proton exchange membrane fuel cell 70 is 1MW, and the cell stack consists of 500 single cells with the active area of 300 square centimeters, wherein a Nafion 212 proton exchange membrane is adopted as a membrane electrode, and the Pt/C catalyst loading capacity is 0.4 mg/square centimeter.

It should be understood that the heat energy supply module may be composed of a titanium alloy plate heat exchanger, the heat exchange area is 200 square meters, in the heat energy supply module, the heat exchanger exchanges heat between purified water and cooling water of the nuclear power station to prepare water vapor, and when the current temperature of the water vapor prepared by the heat exchanger is smaller than the preset working temperature, the electric heater is automatically started to supplement heat, so that the current temperature of the water vapor is increased to the preset working temperature. In addition, the heat of the cooling water of the nuclear power plant is preferentially used for SOEC electric pile (60% in ratio), raw water evaporation (30% in ratio), rankine cycle preheating (10% in ratio).

Further, the proton exchange membrane fuel cell 70 comprises an air compression module, a heat-moisture exchange module and a reaction module, wherein the proton exchange membrane fuel cell is used for supplying power to the SOEC electrolysis hydrogen production subsystem 20 by electric energy generated by electrochemical reaction, the air compression module is used for compressing filtered ambient air, the heat-moisture exchange module is used for carrying out heat-moisture exchange on the compressed ambient air and outlet tail gas, the reaction module is used for carrying out electrochemical reaction according to the ambient air subjected to heat-moisture exchange and current hydrogen, stabilizing the electric energy generated by the reaction, supplying power to the SOEC electrolysis hydrogen production subsystem by the electric energy generated by the electrochemical reaction according to the electric energy after the voltage stabilization.

It should be understood that the air compression module may be an air compressor, after particulate matters and impurities in the ambient air are filtered, the filtered ambient air is compressed to 0.22MPa by the air compression module, then the compressed ambient air is controlled to enter the heat-moisture exchange module, the membrane humidifier in the heat-moisture exchange module is utilized to perform heat-moisture exchange with the outlet tail gas of the proton exchange membrane fuel cell, so that the humidity of the ambient air reaches 85% rh, the temperature rises to 65 ℃, then the ambient air after heat-moisture exchange is sent to the cathode, electrochemical reaction is performed in the cell stack of the proton exchange membrane fuel cell, and the generated direct current is regulated by the DC/DC converter and then is connected to the system direct current bus to provide electric energy for the SOEC electrolytic hydrogen production subsystem 20.

Further, the multi-energy complementary SOEC hydrogen production system 01 further comprises a water thermal management module 80, the SOEC electrolytic hydrogen production subsystem 20, after the step of electrolyzing the target purified seawater through the SOEC galvanic pile to obtain the current hydrogen and the current high-temperature gas, the water thermal management module 80, after detecting that the mixture of water generated by the reaction and unreacted gas is discharged from the positive electrode, is used for performing gas-liquid separation on the mixture, and the water thermal management module 80 is further used for recycling the separated liquid water to the deionized water tank, and transmitting the first part of the separated gas to the SOEC electrolytic hydrogen production subsystem 20 for performing anodic oxidation reaction and the second part of the separated gas to the silencing equipment for discharging.

It should be understood that since water is also produced during the reaction, it is detected in real time whether a mixture of water generated by the reaction and unreacted gas is discharged from the positive electrode, and if so, the mixture is subjected to gas-liquid separation by a gas-liquid separator, wherein the separated liquid water is recycled to the deionized water tank, the first portion of the separated gas transmitted to the SOEC electrolytic hydrogen production subsystem 20 has an oxygen content of 15%, and the muffler device for discharge may be a muffler.

The waste heat recovery subsystem 40 is configured to recover the current high-temperature gas, and generate power according to the waste heat of the recovered current high-temperature gas, so as to obtain a current power generation amount.

It should be understood that, in order to achieve reasonable utilization of heat energy, after the current high-temperature gas is generated, the current high-temperature gas is introduced into the waste heat recovery subsystem 40, the current high-temperature gas is recovered by the waste heat recovery subsystem 40, and power generation is performed according to the waste heat of the recovered current high-temperature gas. The waste heat recovery subsystem 40 comprises a Rankine cycle device, an organic working medium R245fa, and consists of an evaporator with a heat exchange area of 80 square meters, a 100kW turbine generator, a water-cooled condenser and a working medium pump.

After the waste heat recovery subsystem 40 is used for waste heat power generation, the current hydrogen is boosted to 0.28MPa by a compressor, the boosted hydrogen number is input into a humidifier and contacted with deionized water to enable the humidity to reach 90% rh, the inlet condition of the proton exchange membrane fuel cell is met, a small part of unreacted hydrogen flows back to the SOEC cathode inlet through a circulating pump, and the rest of hydrogen is introduced into the hydrogen treatment and storage subsystem 60.

The intelligent control subsystem 50 is configured to regulate and control the power generation amount according to the current power generation amount.

It can be understood that the intelligent control subsystem 50 comprises a siemens S7-1200PLC controller, 23 Pt100 temperature sensors, 16 pressure transmitters, 8 vortex street type gas flowmeters and an industrial touch screen, and is used for regulating and controlling the generated energy, i.e. after the current generated energy generated by the waste heat power generation is obtained, the generated energy can be regulated and controlled by combining with the current generated energy.

The hydrogen processing and storage subsystem 60 is configured to store the current hydrogen.

It should be noted that the hydrogen treatment and storage subsystem 60 includes a drying and purifying unit and a hydrogen storage device, wherein the drying and purifying unit may be a molecular sieve dryer with an adsorption dew point of-40 ℃, and is composed ofAs a deoxidizing catalyst bed, the hydrogen storage device can be composed of 3 groups of 10 cubic meters high-pressure hydrogen storage tanks, the working pressure is 30MPa, and carbon fibers are wound on the hydrogen storage tanks. After drying by the drying and purifying unit, the hydrogen is stored by the hydrogen storage device.

The embodiment comprises a seawater pretreatment subsystem 10, an SOEC electrolytic hydrogen production subsystem 20, an energy supply subsystem 30, a waste heat recovery subsystem 40, an intelligent control subsystem 50 and a hydrogen treatment and storage subsystem 60, wherein the energy supply subsystem 30 supplies energy to the SOEC electrolytic hydrogen production subsystem 20, a power stability regulation strategy is used for maintaining the input power of an SOEC stack in the SOEC electrolytic hydrogen production subsystem 20 in a stable state, the seawater pretreatment subsystem 10 is used for purifying and pretreating coastal seawater in a coastal nuclear power scene to obtain target purified seawater, the SOEC electrolytic hydrogen production subsystem 20 is used for electrolyzing the target purified seawater to obtain current hydrogen and current high-temperature gas through the SOEC stack, the waste heat recovery subsystem 40 is used for recovering the current high-temperature gas and generating electricity according to the waste heat of the recovered current high-temperature gas to obtain current generated energy, the intelligent control subsystem 50 is used for regulating and controlling the generated energy according to the current generated energy, and the hydrogen treatment and storage subsystem 60 is used for storing the current hydrogen. Through the mode, an energy closed loop of electrolysis-power generation-energy supplement is formed, so that various energy sources are efficiently utilized cooperatively, the total energy efficiency of the SOEC hydrogen production system can be effectively improved, and the application range is wide.

Based on this, the embodiment of the application provides a power stability control method of a multi-energy complementary SOEC hydrogen production system, and referring to fig. 2, fig. 2 is one of flow diagrams of the power stability control method of the multi-energy complementary SOEC hydrogen production system provided by the embodiment of the application. Step S10 includes steps S101-S104:

Step S101, obtaining photovoltaic power generation power of a photovoltaic power generation unit of the polycrystalline silicon component, wind power generation power of a wind power generation unit and time consumption power of an SOEC electrolysis hydrogen production subsystem.

The photovoltaic power generation power refers to the power generated by a photovoltaic power generation unit of the polycrystalline silicon component at the current moment, the wind power generation power refers to the power generated by the wind power generation power at the current moment, and the time consumption power refers to the power consumed by the SOEC electrolysis hydrogen production subsystem in real time.

And step S102, calculating the total output of renewable energy sources according to the photovoltaic power generation power and the wind power generation power.

It can be understood that when the photovoltaic power generation power and the wind power generation power are obtained, the total output of the renewable energy sources is calculated, specifically:

wherein, the Indicating the total output of the renewable energy source,The power of the photovoltaic power generation is represented,Representing wind power generation power.

Step S103, calculating a power difference value according to the total output of the renewable energy sources and the time consumption power.

It should be understood that the power difference refers to the difference between the total output of the renewable energy source and the power consumed in time, and the power difference may be calculated by:

wherein, the Indicating the difference in power value of the power,Represents the time consumption power of the SOEC electrolysis hydrogen production subsystem,Indicating the total output of the renewable energy source.

Step S104, determining a power stability regulation strategy according to a comparison result of the power difference value and a preset value, and maintaining the input power of the SOEC stack in the SOEC electrolysis hydrogen production subsystem in a stable state according to the power stability regulation strategy.

It should be noted that the power stability regulation strategy refers to a strategy for regulating the power generation output of the renewable energy source and the proton exchange membrane fuel cell, so as to maintain the input power of the SOEC stack in the SOEC electrolysis hydrogen production subsystem in a stable state, where the input power may be 1.2MW. The preset value can be 0, when the comparison result is that the power difference value is larger than the preset value, the renewable energy is insufficient, and the proton exchange membrane fuel cell is needed to be supplemented, otherwise, when the comparison result is that the power difference value is smaller than the preset value, surplus is indicated, and the proton exchange membrane fuel cell output can be charged or reduced.

The method comprises the steps of obtaining current working power of a proton exchange membrane fuel cell when the fluctuation amplitude of a power difference value is smaller than or equal to a target value, triggering charging and discharging buffering of the lithium cell according to the power stability regulation strategy when the current working power is within a preset percentage range of rated power, regulating flow of a hydrogen valve at an inlet of the proton exchange membrane fuel cell in a PID control mode according to the power stability regulation strategy when the current working power is not within the preset percentage range of rated power, and maintaining the input power of the SOEC stack in the SOEC electrolytic hydrogen production subsystem in a stable state.

It should be understood that the target value may be 5%, the rapid response period may be 0-10s, and when it is determined that the fluctuation range of the power difference is greater than the target value, the lithium battery is regulated according to the power regulation strategy advantage to perform power compensation in the rapid response period, and the charge-discharge rate may be 1C, and meanwhile, the proton exchange membrane fuel cell is controlled to perform slow regulation. After 10s, the stable regulation stage is carried out, the exit of the lithium battery is regulated, and the regulation is carried out by regulating and controlling the proton exchange membrane fuel cell, so that the fluctuation range of the input power of the SOEC stack in the SOEC electrolysis hydrogen production subsystem is ensured to be less than +/-2 percent.

It can be understood that when it is determined that the fluctuation amplitude of the power difference is smaller than or equal to the target value, it is further determined whether the current working power of the proton exchange membrane fuel cell is within a preset percentage range of the rated power, if yes, the charging and discharging buffer of the lithium cell is triggered, the preset percentage range may be 20% -100%, otherwise, the flow of the hydrogen valve at the inlet of the proton exchange membrane fuel cell is regulated and controlled in a PID control manner according to a power stability regulation and control strategy, at this time, a regulation and control model for realizing accurate regulation of the flow by feedforward control and feedback correction is established, and an algorithm configured in the regulation and control model may be as follows:

wherein, the Indicating the output of the proton exchange membrane fuel cell,Indicating the flow rate of the hydrogen gas,Indicating that the low heating value of the hydrogen gas,Representing real-time efficiency.

It should be noted that, by adjusting the flow rate (response time <1 s) of the hydrogen valve at the inlet, the output of the proton exchange membrane fuel cell is changed, and the corresponding relationship between the hydrogen flow rate and the generated energy is as follows: And automatically adjusting the air supply quantity according to the real-time power to maintain the air excess coefficient between 1.8 and 2.2. In addition, in order to realize dynamic response optimization, the PID control mode can adopt sectional regulation and control, specifically, when the current working power of the proton exchange membrane fuel cell is positioned at 20% -50% of rated power, the current working power is indicated to be in a low-load stage, at the moment, a proportional coefficient Kp=0.6, an integral time Ti=15s and a differential time Td=1s can be set to ensure stable regulation and control, and when the current working power of the proton exchange membrane fuel cell is positioned at 50% -100% of rated power, the current working power is indicated to be in a high-load stage, at the moment, the proportional coefficient Kp=1.0, the integral time Ti=8s and the differential time Td=3s can be set to accelerate response speed control. And a limit protection mechanism is also arranged, when the total output suddenly drop percentage of the renewable energy source is more than 30% or the suddenly rise percentage is more than 20%, SOEC current limit protection is triggered, and the maximum change rate is less than or equal to 5A/min.

The method comprises the steps of obtaining photovoltaic power generation power of a photovoltaic power generation unit of a polycrystalline silicon component, wind power generation power of a wind power generation unit and time consumption power of an SOEC electrolysis hydrogen production subsystem, calculating total output of renewable energy sources according to the photovoltaic power generation power and the wind power generation power, calculating a power difference value according to the total output of the renewable energy sources and the time consumption power, determining a power stability regulation strategy according to a comparison result of the power difference value and a preset value, and maintaining input power of an SOEC stack in the SOEC electrolysis hydrogen production subsystem in a stable state according to the power stability regulation strategy. By the mode, after the power difference is calculated according to the photovoltaic power generation power of the photovoltaic power generation unit of the polycrystalline silicon component, the wind power generation power of the wind power generation unit and the time consumption power of the SOEC electrolysis hydrogen production subsystem, a power stability regulation strategy is determined by combining a preset value, and the power generation output of the renewable energy source and the proton exchange membrane fuel cell is regulated, so that the input power of the SOEC stack is maintained in a stable state, and the stable operation of the SOEC electrolysis hydrogen production subsystem is ensured.

Based on the method in the foregoing embodiment, an embodiment of the present application provides an electronic device, please refer to fig. 3, and fig. 3 is a schematic structural diagram of the electronic device provided in the embodiment of the present application.

It should be noted that the system may include a Processor (Processor) 10, a communication interface (Co multi-energy complementary SOEC hydrogen production system and its power stability control unications Interface) 20, a Memory (Memory) 30, and a communication bus 40, where the Processor 10, the communication interface 20, and the Memory 30 complete communication with each other through the communication bus 40. The processor 10 may invoke logic instructions in the memory 30 to perform the methods of the embodiments described above.

Further, the logic instructions in the memory 30 described above may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application.

Based on the method in the above embodiment, the embodiment of the present application provides a computer-readable storage medium storing a computer program, which when executed on a processor, causes the processor to perform the method in the above embodiment.

Based on the method in the above embodiments, an embodiment of the present application provides a computer program product, which when run on a processor causes the processor to perform the method in the above embodiments.

It is to be appreciated that the processor in the embodiments of the present application may be a central processing unit, and may also be other general purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The steps of the method in the embodiment of the present application may be implemented by hardware, or may be implemented by executing software instructions by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the application and is not intended to limit the application, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.

Claims

1. The multi-energy complementary SOEC hydrogen production system is characterized by comprising a sea water pretreatment subsystem, an SOEC electrolytic hydrogen production subsystem, an energy supply subsystem, a waste heat recovery subsystem, an intelligent control subsystem and a hydrogen treatment and storage subsystem, wherein the energy supply subsystem supplies energy to the SOEC electrolytic hydrogen production subsystem;

2. The system of claim 1, wherein the seawater pretreatment subsystem comprises a media filtration module, an ultrafiltration membrane module, a desalination module, and a deoxygenation module, wherein the deoxygenation module is filled with palladium catalyst;

3. The system of claim 1, wherein the energy supply subsystem comprises an electrical energy supply module and a thermal energy supply module, wherein the electrical energy supply module comprises a photovoltaic power generation unit, a wind power generation unit, and a proton exchange membrane fuel cell of a polysilicon assembly;

4. The system of claim 3, wherein the proton exchange membrane fuel cell comprises an air compression module, a heat and humidity exchange module, and a reaction module;

The air compression module is used for compressing the filtered ambient air;

5. The system of claim 1, wherein the multi-energy source complementary SOEC hydrogen production system further comprises a hydrothermal management module;

6. A method for power stabilization regulation of a multi-energy complementary SOEC hydrogen production system, wherein the method is applied to the system as claimed in any one of claims 1 to 5, comprising:

7. The method of claim 6, wherein maintaining the input power of the SOEC stack in the SOEC electrolytic hydrogen production subsystem in a steady state according to the power stabilization regulation strategy comprises:

8. An electronic device, comprising:

At least one memory for storing a computer program;

at least one processor for executing the memory-stored program, which processor is adapted to perform the method according to any of claims 6-7, when the memory-stored program is executed.

9. A computer readable storage medium storing a computer program, characterized in that the computer program, when run on a processor, causes the processor to perform the method according to any of claims 6-7.

10. A computer program product, characterized in that the computer program product, when run on a processor, causes the processor to perform the method according to any of claims 6-7.