A soe / rsoc multi-energy complementary-multi-generation energy base system

Abstract

The present application relates to the technical field of multi-energy complementary energy system, and discloses a SOE / RSOC-based multi-energy complementary-multiple production energy base system and an operation method, which comprises a power generation subsystem, an electrochemical conversion subsystem, a chemical product synthesis subsystem and an energy storage subsystem, and the electrochemical conversion subsystem is SOE or RSOC; the power generation subsystem comprises green energy and a coal-fired generator set, or only comprises green energy; the output side of the power generation subsystem is connected with a power grid; the power generation subsystem and the electrochemical conversion subsystem are connected with each other for bidirectional power interaction, and are connected with the chemical product synthesis subsystem respectively. The present application realizes the integration of wind and light renewable energy resources, the hydrogen-ammonia-alkane-alcohol scale production, and the stable supply of reliable, flexible, efficient and clean energy for regional terminal multi-energy demand, and helps to achieve the carbon peak target.

Description

Technical Field

[0001] This invention relates to the field of multi-energy complementary energy systems, and more particularly to a large-scale energy base system based on SOE / RSOC multi-energy complementary-combined generation. Background Technology

[0002] With the increasing severity of global ecological and environmental problems, traditional energy consumption patterns are no longer sufficient to meet the needs of modern green development. To optimize the energy structure and achieve sustainable development, a global energy transition is being actively promoted, shifting from reliance on fossil fuels to cleaner and more efficient energy forms. Multi-energy complementarity, as a new energy development model, aims to improve energy efficiency and reduce energy waste by integrating various energy resources, becoming an important direction for energy transition.

[0003] Deserts, wastelands, and barren lands (sandbars) rich in wind and solar resources are important areas for developing renewable energy power generation technologies. However, large-scale wind and solar power grid integration can impact grid security and stability. Therefore, it is necessary to mitigate the volatility of power grid integration from the perspective of power system stability. Multi-energy complementary energy bases have emerged to address this need, with energy bases using wind-solar-thermal-storage coupling as a key technology becoming an important form of new energy development in sandbars. However, these multi-energy complementary energy bases are centered on electricity, requiring the construction of more and higher-parameter power transmission channels, resulting in a single energy product and transmission route.

[0004] A Chinese patent with publication number CN120193897A discloses a multi-mode power generation system and its operation method for large-scale new energy bases. This system couples a thermal power plant with a molten salt energy storage power plant, utilizing steam flow regulation to achieve energy storage mode, a mode that enhances the load change rate of the thermal power plant, and a peak power generation mode, significantly improving the system's peak-shaving capacity and energy utilization efficiency. However, the system relies on the thermal power plant as its core energy input and does not integrate other renewable or low-carbon energy sources, resulting in significant carbon emissions from the thermal power generation process during power supply. Furthermore, the system primarily operates with thermal power generation and molten salt energy storage in tandem, and its power supply mode relies on boilers and steam circulation, making it difficult to adapt to highly dynamic demands and lacking sufficient power supply flexibility.

[0005] A Chinese patent with publication number CN119726819A discloses a method and system for optimizing the configuration of multiple types of energy storage capacity for large-scale new energy bases. This system achieves safe and stable operation and high-proportion consumption of energy storage capacity by configuring energy storage capacity in stages, combined with electromechanical transient simulation and time-series production simulation, significantly improving the system's anti-disturbance capability and new energy utilization rate. However, the system uses lithium-ion batteries as the core energy storage carrier, resulting in high energy storage costs, limited lifespan, and strong dependence on lithium battery resources. Furthermore, the solution does not integrate zero-carbon long-cycle energy storage technologies such as hydrogen energy storage, making it difficult to meet cross-seasonal energy regulation needs. Additionally, the application of compressed air energy storage is limited by geographical conditions, resulting in insufficient flexibility for large-scale deployment.

[0006] A Chinese patent with publication number CN115882521A discloses a method for constructing a large-scale energy base without thermal power. This method establishes an equivalent model of thermal power, combines a wind-solar-storage capacity matching algorithm with quantitative calculations of frequency regulation capability, and achieves a high degree of substitution for the characteristics of thermal power units, significantly improving the power supply reliability, frequency active support capability, and economic efficiency of the new energy system. However, the system relies on lithium-ion batteries as the core short-term energy storage carrier, resulting in high total life-cycle costs, short lifespan, and high dependence on external lithium resources. Furthermore, the scheme does not integrate zero-carbon long-cycle regulation technologies such as hydrogen energy storage, making it difficult to cope with cross-seasonal energy fluctuations. Complex modeling and multi-stage collaborative optimization also increase the difficulty of system implementation and debugging costs.

[0007] A Chinese patent with publication number CN111313480B discloses a design method for a multi-energy complementary system based on multi-objective optimization. This patent establishes a relationship function between the capacity of each subsystem and the system power and volatility, achieving adaptability and design flexibility for different scenarios. It has significant advantages in optimizing energy system configuration, mitigating power fluctuations, and improving overall energy utilization efficiency. However, while thermal power is the main peak-shaving means in the system and can mitigate new energy fluctuations, it leads to increased carbon emissions, conflicting with the goals of clean energy transition. Furthermore, the energy storage system mainly relies on short-term energy storage technologies such as lithium batteries, lacking the ability to regulate cross-seasonal energy fluctuations, thus limiting the system's ability to cope with long-term fluctuations. Summary of the Invention

[0008] To overcome or alleviate one or more of the above-mentioned technical problems, the purpose of this invention is to provide a large-scale energy base system based on SOE / RSOC multi-energy complementarity and multi-generation. Through the integration of wind and solar renewable energy resources on the resource side and the synergy of electricity-hydrogen multi-energy storage technology, hydrogen-ammonia-alkanes-ols are produced on a large scale. This solves the problem of poor stability of large-scale energy base systems caused by the single energy output system and realizes a reliable, flexible, efficient and clean supply of diversified energy needs at the regional end, thus helping to achieve the carbon peaking target.

[0009] This invention provides the following technical solution:

[0010] On one hand, a large-scale energy base system based on SOE / RSOC multi-energy complementarity and combined heat and power generation is provided, which includes a power generation subsystem, an electrochemical conversion subsystem, a chemical product synthesis subsystem, and an energy storage subsystem. The electrochemical conversion subsystem is in SOE or RSOC configuration. The power generation subsystem includes green energy and coal-fired power generation units, or only green energy. The green energy is selected from photovoltaic arrays and / or wind power generation. The output side of the power generation subsystem is connected to the power grid. The power generation subsystem and the electrochemical conversion subsystem have bidirectional power interaction and are respectively connected to the chemical product synthesis subsystem. The electrochemical conversion subsystem and the power generation subsystem have bidirectional energy interaction with the energy storage subsystem. The RSOC configuration of the electrochemical conversion subsystem has bidirectional energy interaction with the chemical product synthesis subsystem. The energy storage subsystem includes lithium batteries and hydrogen storage tanks to regulate the internal power balance of the system.

[0011] The electrochemical conversion subsystem, in the SOE configuration, performs electro-chemical conversion to achieve efficient absorption of renewable energy in the energy base; in the RSOC configuration, the reversible solid oxide battery operates in both SOFC fuel cell and SOEC electrolyzer modes, performing electro-chemical-electro-conversion to achieve efficient conversion and storage of renewable energy in the base and cross-seasonal energy balance. It can perform electro-chemical conversion in SOEC electrolyzer mode or chemical-electro-conversion in SOFC fuel cell mode.

[0012] The hydrogen storage tank is used to regulate the balance of hydrogen energy supply and demand within the system. In the electrolysis mode of SOE or RSOC configuration, the output of the electrochemical conversion subsystem is connected to the input side of the hydrogen storage tank. In the fuel cell mode of ROSC configuration, the input of the electrochemical conversion subsystem is connected to the output side of the hydrogen storage tank. By storing hydrogen, chemical energy is stored, realizing the medium- and long-term energy storage function.

[0013] The chemical product synthesis subsystem includes any one or any combination of ammonia synthesis equipment, methanol synthesis equipment, and methane synthesis equipment. All of these are connected to the output of the electrochemical conversion subsystem in the SOE and RSOC configurations of the electrolysis mode and the energy storage subsystem. This converts the chemical energy and electrical energy in hydrogen or synthesis gas into the chemical energy in the chemical products, and stores the output of the chemical products to achieve a stable output of the chemical products. The output of the chemical product synthesis subsystem can also be connected to the input of the electrochemical conversion subsystem to convert the chemical energy in any one or any combination of ammonia, methanol, and methane into electrical energy through the RSOC configuration fuel cell mode to supply electricity demand.

[0014] According to some possible implementation methods, the electrochemical conversion subsystem includes two operating modes: co-electrolysis and steam electrolysis. In the co-electrolysis mode, water vapor and carbon dioxide are simultaneously electrolyzed using a solid oxide electrolyzer to directly generate syngas, which is then input into the chemical product synthesis subsystem to synthesize methane and methanol. In the steam electrolysis mode, water vapor is electrolyzed using a solid oxide electrolyzer, and the generated hydrogen is input into the hydrogen storage tank of the energy storage subsystem for subsequent hydrogen use or directly input into the chemical product synthesis subsystem to produce ammonia, methane, or methanol.

[0015] According to some possible implementations, in the SOE configuration of the steam electrolysis subsystem, the solid oxide electrolyzer is connected to the output of the power generation system and to the input of the energy storage subsystem, converting electrical energy into hydrogen energy and storing the hydrogen in the hydrogen storage tank for long-term storage, or the hydrogen is input into the chemical product synthesis subsystem to obtain syngas through external reforming, and then synthesizing methane and methanol, and synthesizing ammonia through the "Haber process"; in the SOE configuration of the co-electrolysis subsystem, the solid oxide electrolyzer is deeply coupled with the chemical product synthesis subsystem to obtain syngas through co-electrolysis, and the syngas is sent into the chemical product synthesis subsystem to synthesize methane and methanol.

[0016] According to some possible implementations, in the RSOC configuration, the electrochemical conversion subsystem involves bidirectional interaction between the reversible solid oxide battery and the energy storage subsystem and the power generation subsystem. In SOFC power generation mode, it is connected to the input of the power generation subsystem and to the output of the energy storage subsystem or the chemical product synthesis subsystem, converting chemical energy into electrical energy to supply the power load of the large-scale base system. In SOE electrolysis mode, it is connected to the output of the power generation subsystem and to the input of the energy storage subsystem for co-electrolysis or steam electrolysis. During steam electrolysis, electrical energy is converted into hydrogen energy, and the hydrogen is stored in the hydrogen storage tank for medium- to long-term storage. Alternatively, the hydrogen can be input into the chemical product synthesis subsystem to obtain syngas through external reforming, which is then used to synthesize methane and methanol, and ammonia can be synthesized through the Haber process. In SOE electrolysis mode, the reversible solid oxide battery can be deeply coupled with the chemical product synthesis subsystem for thermo-mass-electrical coupling during co-electrolysis, obtaining syngas through co-electrolysis, which is then fed into the chemical product synthesis subsystem to synthesize methane and methanol.

[0017] On the other hand, the present invention provides an operation method for the above-mentioned SOE / RSOC multi-energy complementary-multi-generation energy base system, which includes:

[0018] When the green energy output exceeds the electricity demand, hydrogen or syngas is produced in the electrochemical conversion subsystem under the RSOC and SOE configuration in electrolysis mode. The chemical product synthesis subsystem produces chemical products through electrical energy and chemical energy, achieving a stable output of chemical products.

[0019] When the output of the green energy source is less than the electricity demand, the electrochemical conversion subsystem in the RSOC configuration operates in fuel cell mode, producing electricity by consuming hydrogen, ammonia, methane or methanol to supply the electricity demand.

[0020] According to some possible implementation methods, in the SOE configuration, the green energy is the main power input of the large base, the coal-fired power generation unit and the lithium battery play a peak-shaving role, and work together to meet the power demand and maintain the power stability of the large base; when the output of the green energy exceeds the power demand, the output of the coal-fired power generation unit is reduced, and the surplus power is absorbed by the lithium battery and solid oxide electrolyzer. When there is still a surplus of power, the surplus power can be connected to the grid to supply the external power demand.

[0021] The electrochemical conversion subsystem has two operating modes. In co-electrolysis mode, the solid oxide electrolyzer can be deeply coupled with the chemical product synthesis subsystem to absorb excess electricity and co-electrolyze water and carbon dioxide to obtain syngas. The syngas is then fed into the chemical product synthesis subsystem to synthesize methane and methanol, thereby improving system efficiency. In steam electrolysis mode, the solid oxide electrolyzer is connected to the output of the power generation system and the input of the energy storage subsystem to convert electrical energy into hydrogen energy. The hydrogen is then stored in the hydrogen storage tank for long-term storage, or the hydrogen is fed into the chemical product synthesis subsystem to obtain syngas through external reforming and then synthesize methane and methanol, which are then synthesized into ammonia via the Haber process.

[0022] When the output of green energy is less than the demand for electricity, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different objectives is adopted to coordinate the release of electricity from lithium batteries and the load increase of coal-fired power generation units, thereby maintaining the power balance within the base and achieving the stable output of electricity-hydrogen-ammonia-alkanes-alcohols from the base.

[0023] According to some possible implementation methods, in the RSOC configuration, the green energy is the main power input of the large base. The RSOC fuel cell mode, coal-fired generator set and lithium battery play the role of peak shaving, and work together to meet the power demand and maintain the power stability of the large base. When the output of the green energy is greater than the power demand, the output of the coal-fired generator set is reduced, and the surplus power is absorbed by the lithium battery and RSOC electrolysis mode. When there is still a surplus of power, the surplus power is fed into the grid to supply the external power demand.

[0024] In electrolysis mode, the RSOC performs co-electrolysis or steam electrolysis. During co-electrolysis, the RSOC is deeply coupled with the chemical product synthesis subsystem to absorb excess electricity. Water and carbon dioxide are co-electrolyzed to obtain syngas, which is then fed into the chemical product synthesis subsystem to synthesize methane and methanol, thereby improving system efficiency. In steam electrolysis mode, the RSOC is connected to the output of the power generation system and the input of the energy storage subsystem to convert electrical energy into hydrogen energy. The hydrogen is then stored in the hydrogen storage tank for long-term storage, or the hydrogen is fed into the chemical product synthesis subsystem to obtain syngas through external reforming, which is then used to synthesize methane and methanol, and ammonia is synthesized through the "Haber process".

[0025] When the output of green energy is less than the demand for electricity, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different objectives is adopted to coordinate the release of electricity from lithium batteries, the load increase of coal-fired generator sets, and the power generation of RSOC in fuel cell mode, thereby maintaining the power balance within the base and realizing the stable output of electricity-hydrogen-ammonia-alkanes-alcohols from the base.

[0026] According to some possible implementation methods, in a large base of SOE configuration:

[0027] When the output of green energy exceeds the electricity demand, the output of coal-fired power generating units is reduced, and the surplus electricity is consumed through lithium batteries and solid oxide electrolyzers. If there is still a surplus of electricity, it can be fed into the grid to supply external electricity demand. The electrochemical conversion subsystem consumes the surplus electricity through co-electrolysis or steam electrolysis and is connected to the chemical product synthesis subsystem to prepare chemical products. When the output of green energy is less than the electricity demand, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different economic, environmental and safety objectives is adopted to coordinate the release of electricity from lithium batteries and the load increase of coal-fired power generating units, thereby maintaining the power balance within the energy base and realizing the stable output of electricity-hydrogen-ammonia-alkanes-alcohols from the energy base.

[0028] In the large base of the RSOC configuration:

[0029] When the output of green energy exceeds the electricity demand, the output of coal-fired power generating units is reduced, and the surplus electricity is consumed through lithium batteries and RSOC electrolysis mode. If there is still surplus electricity, it can be fed into the grid to supply external electricity demand. The electrochemical conversion subsystem consumes surplus electricity through co-electrolysis or steam electrolysis in electrolysis mode, and is connected to the chemical product synthesis subsystem to prepare chemical products. The hydrogen produced by steam electrolysis is stored in the hydrogen storage tank of the energy storage subsystem, undertaking the function of long-term energy storage. When the output of green energy is less than the electricity demand, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different economic, environmental and safety objectives is adopted. This strategy coordinates the release of electricity from lithium batteries, the load increase of coal-fired power generating units and the power generation of RSOC in fuel cell mode, thereby maintaining the power balance within the energy base and realizing the stable output of electricity-hydrogen-ammonia-alkanes-ols from the energy base.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. A stable and efficient large-scale energy base has been constructed. By integrating fluctuating renewable energy sources such as photovoltaics and wind power with coal-fired power generation, and coupling electricity-hydrogen multi-energy storage with chemical co-production, the traditional single-output energy base model has been transformed. This system achieves multi-energy complementarity and synergistic optimization, significantly improving the overall stability and power supply reliability of large-scale energy bases in the face of the intermittency and volatility of renewable energy.

[0032] 2. Leveraging the synergistic advantages of SOE and RSOC configurations, SOE's core advantage lies in its high efficiency and deep coupling. Its co-electrolysis mode can directly utilize carbon dioxide and water to produce syngas, achieving a high degree of integration of electricity, heat, and materials with the methanol / methane synthesis unit. This eliminates the traditional independent syngas production step and enables efficient recovery and utilization of reaction waste heat, greatly improving the overall system energy efficiency. RSOC's core advantage lies in its flexible operating mode and long-term energy storage. It integrates the dual functions of an electrolyzer and a fuel cell. In conjunction with a hydrogen storage tank, it can achieve efficient bidirectional conversion between electrical energy and hydrogen energy, providing the system with long-term energy regulation capabilities across seasons and weather conditions. This is crucial for mitigating seasonal fluctuations in renewable energy.

[0033] 3. Achieving multi-path consumption and high-value conversion of "hydrogen-ammonia-alkane-ol": The chemical product synthesis subsystem provides diversified and high-energy-density chemical energy storage and consumption pathways for excess renewable energy power. This not only transforms unstable electricity into stable, easy-to-store, and easy-to-transport green chemical products and fuels, but also expands the market value of the products and enhances the economic efficiency and risk resistance of the entire energy base.

[0034] 4. Achieving synergy between lithium batteries and hydrogen storage tanks for both short and long-term energy storage. Lithium batteries have a fast response speed, which can be used to solve short-term power fluctuations and balance problems at the intraday and hourly levels, ensuring power stability in large-scale bases. Hydrogen storage tanks and RSOC together constitute a long-term, cross-seasonal energy storage solution, producing and storing hydrogen when renewable energy is abundant and generating electricity when it is scarce, effectively solving long-term imbalance problems such as "abundant in summer and scarce in winter" and "diurnal fluctuations" of renewable energy. Attached Figure Description

[0035] Figure 1 This is a structural block diagram of the SOE / RSOC multi-energy complementary-multi-generation energy base system provided in Embodiment 1 of the present invention.

[0036] Figure 2 This is a structural block diagram of the SOE multi-energy complementary-multi-generation energy base system provided in Embodiment 2 of the present invention.

[0037] Figure 3 This is a structural block diagram of the RSOC multi-energy complementary-electric hydrogen ammonia polygeneration energy base system provided in Embodiment 3 of the present invention.

[0038] Figure 4 This is a structural block diagram of the future zero-carbon-RSOC multi-energy complementary-electric hydrogen-ammonia polygeneration energy base system provided in Embodiment 4 of the present invention.

[0039] Figure 5 This is a structural block diagram of the SOE co-electrolysis multi-energy complementary-electro-alkanol polygeneration energy base system provided in Embodiment 5 of the present invention.

[0040] Figure 6 This is a structural block diagram of the RSOC steam electrolysis multi-energy complementary-hydrogen ammonia alkane polygeneration energy base system provided in Embodiment 6 of the present invention.

[0041] In the picture:

[0042] 1-Power generation system; 2-Electrochemical conversion subsystem; 3-Chemical product synthesis subsystem; 4-Energy storage subsystem; 101-Power grid; 102-Photovoltaic panel; 103-Wind power generation; 104-Coal-fired generator set; 205-Solid oxide electrolyzer; 206-Reversible solid oxide battery; 307-Ammonia synthesis equipment; 308-Methanol synthesis equipment; 309-Methane synthesis equipment; 410-Hydrogen storage tank; 411-Lithium battery. Detailed Implementation

[0043] The present invention will now be described in detail with reference to embodiments and accompanying drawings. However, it should be understood that the embodiments and drawings are for illustrative purposes only and do not constitute any limitation on the scope of protection of the present invention. All reasonable modifications and combinations included within the inventive spirit of the present invention fall within the scope of protection of the present invention.

[0044] The present invention will be further described below with reference to the accompanying drawings.

[0045] Example 1

[0046] like Figure 1 As shown, this embodiment provides a large-scale energy base system based on SOE / RSOC multi-energy complementarity and combined heat and power generation. The resource side integrates wind and solar resources, supplying power to the system through wind power generation and photovoltaic arrays. The power bus is connected to the main power grid, serving as a power output channel to meet the diversified and large-scale energy and chemical raw material needs of the large energy base and its surrounding area, including electricity, hydrogen, ammonia, alkanes, and alcohols.

[0047] Specifically, the multi-energy complementary-multi-generation energy base system includes four subsystems: power generation system 1, electrochemical conversion subsystem 2, chemical product synthesis subsystem 3, and energy storage subsystem 4.

[0048] The output terminals of the wind power generator 103, photovoltaic panel 102, and coal-fired generator set 104 are connected in the current layer, and the power is output to the solid oxide electrolyzer 205 (i.e. SOEC) or reversible solid oxide fuel cell 206 (i.e. RSOC), chemical product synthesis subsystem 3, and auxiliary power equipment. Wind power 103 converts wind energy into electricity, which is then input into the power generation system 1 as renewable energy. When wind resources are abundant, it provides zero-carbon electricity and reduces the system's carbon emissions. Photovoltaic panels 102 convert solar energy into electricity and input it into the power generation system 1. When there is sufficient sunshine, it provides stable power supply and supports the low-carbon operation of the energy base. Coal-fired generator set 104 plays a peak-shaving role in the SOE configuration, ensuring power supply reliability when wind and solar power fluctuate. In the RSOC configuration, the reversible solid oxide fuel cell 206 operates in SOFC mode when there is a power shortage. It consumes hydrogen from the hydrogen storage tank 410 to generate electricity. The hydrogen is preheated at 650–800°C and then fed into the fuel electrode (the fuel electrode is the electrode into which hydrogen is input in the RSOC in SOFC mode). The air is preheated and then fed into the air electrode to generate electricity, which is then input into the power generation system 1. In addition to consuming hydrogen from the hydrogen storage tank, it can also consume ammonia, methane, or methanol from the chemical product layer to generate electricity. The power generation system 1 is bidirectionally connected to the lithium battery 411, charging the energy storage device when there is sufficient power and supplying power through the energy storage device when there is insufficient power.

[0049] Electrochemical conversion subsystem 2 employs either a solid oxide electrolyzer or a reversible solid oxide battery (SOE or RSOC) configuration, with one option selected during operation to achieve electro-hydrogen-electric conversion. Simultaneously, the high-temperature operating conditions result in high system efficiency for hydrogen production through electrolysis and high overall energy utilization efficiency for the fuel cell's thermoelectric effect. When the solid oxide electrolyzer 205 (SOE configuration) is selected, hydrogen production through electrolysis is initiated when wind and solar power output exceeds electricity demand. Its core advantage lies in its deep coupling with the chemical product synthesis subsystem 3, generating syngas through co-electrolysis, which is directly supplied to the methanol synthesis unit 308 and the methane synthesis unit 309, eliminating the need for a separate syngas preparation unit. The high-temperature waste heat released during the methanol / methane synthesis process is used to preheat the SOEC electrolysis reactants, forming a thermally integrated closed loop and improving system energy efficiency. Pure hydrogen produced in the steam electrolysis mode is stored in a hydrogen storage tank or directly supplied to the ammonia synthesis unit 307, simplifying the process flow. When the reversible solid oxide battery 206, i.e., RSOC configuration, is selected, it supports dual-mode operation of SOFC (power generation) and SOEC (electrolysis). When power is scarce, it operates in fuel cell mode, consuming hydrogen from the hydrogen storage tank 410 or ammonia, methane, and methanol from the chemical product layer to generate electricity, which is directly supplied to the power generation system 1. When power is abundant, it performs steam electrolysis in electrolysis mode, consuming the surplus power to produce hydrogen, which is stored in the hydrogen storage tank 410. At the same time, it can also perform co-electrolysis and be deeply coupled with the chemical product synthesis subsystem 3.

[0050] The chemical product synthesis subsystem 3, through chemical product synthesis equipment, converts electrical and hydrogen energy into chemical energy in chemical products on a large scale, producing chemical products such as ammonia, alcohols, and alkanes to supply the needs of the base itself and the regional market. The chemical product synthesis subsystem 3 includes an ammonia synthesis unit 307, a methanol synthesis unit 308, and a methane synthesis unit 309. In the ammonia synthesis unit 307, hydrogen and nitrogen from the hydrogen storage tank 410 are catalytically synthesized into liquid ammonia under high temperature and high pressure (400–550℃, 15–30MPa) using the Haber-Bosch process. In the methanol synthesis unit 308, the synthesis gas generated by SOEC co-electrolysis can be directly received, or hydrogen from the hydrogen storage tank can be mixed with external CO2 in a certain proportion and synthesized into crude methanol under the action of a catalyst at 220–300℃ and 50–100 bar, followed by distillation purification. In the methane synthesis unit 309, the synthesis gas generated by SOEC co-electrolysis can be directly received, or hydrogen from the hydrogen storage tank 410 can be reacted with external CO2 on a catalyst to synthesize methane. The high-temperature waste heat released during the methanol and methane synthesis process is used to preheat the SOEC electrolysis reactants, forming a thermally integrated closed loop and improving system energy efficiency. The synthesized chemical products are stored in corresponding storage tanks to supply external demand or to power the fuel cell mode of the RSOC configuration of the electrochemical conversion subsystem.

[0051] The energy storage subsystem 4 includes energy storage devices such as lithium batteries 411 and hydrogen storage tanks 410. The energy storage devices decouple the multiple energy flows within the system, smooth out the fluctuations in wind and solar power output on the resource side, significantly improve the stability and reliability of the power supply of large-scale energy base systems, enhance the ability of the base system to interact with external energy sources, and reduce the overall energy supply cost of the system by participating in grid peak shaving and other electricity market ancillary services.

[0052] In the large-scale energy storage system, the power generation system 1, lithium battery 411, electrochemical conversion subsystem 2, and high-pressure hydrogen storage tank 410 together constitute a multi-element energy storage system. This system achieves decoupling of multiple energy flows within the system, addresses the fluctuations in renewable energy sources, and provides auxiliary power services such as peak shaving and frequency regulation for the power grid. At the same time, the electrochemical conversion subsystem converts fluctuating renewable energy power into stable chemical energy in hydrogen, enhancing the system's power supply stability and reliability.

[0053] Multiple optional technical routes are provided in the power generation subsystem 1, electrochemical conversion subsystem 2, chemical product synthesis subsystem 3 and energy storage subsystem 4. The capacity of different equipment is determined according to the criteria of economy, environmental protection, efficiency and reliability, taking into account resource distribution and demand characteristics. At the same time, the electrochemical conversion subsystem 2 provides an electro-hydrogen-electro-conversion path, which improves the system's energy supply flexibility.

[0054] When the photovoltaic panel 102 and wind power generation 103 in the power generation system 1 have sufficient output, hydrogen can be produced by electrolysis in both SOE and RSOC configurations.

[0055] The electrochemical conversion subsystem 2 adopts either SOE or RSOC configurations. In the SOE configuration, the system is dedicated to large-scale hydrogen production and deep electrothermal coupling with the chemical product synthesis subsystem. In the RSOC configuration, in addition to large-scale hydrogen production and deep electrothermal coupling with the chemical product synthesis subsystem in electrolysis mode, the system can also supply power to large-scale bases in fuel cell mode, and coordinate with coal-fired power generation units for flexible peak shaving and emergency power supply.

[0056] Currently, the RSOC configuration still requires coal-fired power generators for flexible peak shaving. With further technological advancements in the future, the system may no longer need coal-fired power generators. Instead, it can achieve 100% green electricity supply for large energy bases through the coordinated operation of the RSOC and energy storage subsystems, with zero carbon emissions during operation. In this case, lithium batteries will serve as intraday power balancing devices, while the RSOC and hydrogen storage tanks will serve as cross-seasonal energy balancing devices. The three will work together to maintain power balance and stable output of chemical products within the large energy base.

[0057] The energy storage subsystem 4 realizes a flexible combination of multiple energy storage technologies such as electricity storage and hydrogen storage, which greatly improves the flexibility of system integration and operation optimization.

[0058] The following examples illustrate the operation in SOE configuration, the operation in RSOC configuration, the co-electrolysis in future zero-carbon RSOC configuration, the co-electrolysis in SOE configuration, and the steam electrolysis in RSOC configuration.

[0059] Example 2

[0060] like Figure 2 As shown, this embodiment provides a multi-energy complementary-multi-generation system based on SOEC for a large-scale energy base. The base-level energy system includes a power generation subsystem 1, an electrochemical conversion subsystem 2, a chemical product synthesis subsystem 3, and a multi-element energy storage subsystem 4.

[0061] The power generation system 1 includes photovoltaic panels 102, wind power generation 103, and coal-fired generator set 104. The output side of the power generation system 1 is connected to the power grid 101 and directly connected to the electrochemical conversion subsystem 2 and the chemical product synthesis subsystem 3. In the energy storage subsystem 4, the lithium battery 411 acts as a buffer to regulate the internal power balance of the system. When there is sufficient power, the output of the power generation system is connected to the input side of the lithium battery 411, and when there is insufficient power, the input of the power generation system is connected to the output side of the lithium battery 411, thus realizing short-term power storage and regulation.

[0062] The electrochemical conversion subsystem 2 employs solid oxide electrolysis hydrogen production technology and consists of a solid oxide electrolyzer (SOEC) 205, which produces hydrogen when the power generation system 1 has sufficient power.

[0063] In the energy storage subsystem 4, the hydrogen storage tank 410 serves as a buffer to regulate the balance of hydrogen energy supply and demand within the system, and the output of the electrochemical conversion subsystem 2 is connected to the input side of the hydrogen storage tank 410.

[0064] The large-scale ammonia synthesis equipment 307 in the chemical product synthesis subsystem 3 is connected to the output of the lithium battery 411 and the hydrogen storage tank 410, converting hydrogen energy and electrical energy into chemical energy in the chemical product ammonia, and outputting the chemical product for storage or supply to the base.

[0065] Example 3

[0066] like Figure 3 As shown, this embodiment provides a multi-energy complementary-multi-generation system based on RSOC for a large-scale energy base. The base-level energy system includes a power generation subsystem 1, an electrochemical conversion subsystem 2, a chemical product synthesis subsystem 3, and a multi-element energy storage subsystem 4.

[0067] The power generation system 1 includes photovoltaic panels 102, wind power generation 103, and coal-fired generator units 104, forming a multi-source complementary structure of wind, solar, and thermal power. The output side of power generation system 1 is connected to the power grid 101 and has bidirectional power interaction with the electrochemical conversion subsystem 2, while also directly supplying power to the chemical product synthesis subsystem 3. The core of its operating strategy is that the coal-fired generator unit 104, as a key regulating power source, reduces its load when wind and solar output exceeds the total system power demand to prioritize the consumption of renewable energy; and increases its load when wind and solar output is less than the total system power demand to compensate for the power gap and ensure power supply stability.

[0068] In the energy storage subsystem 4, the lithium battery 411 acts as a buffer to regulate the internal power balance of the system. When the wind and solar power output is greater than the power demand, the output of the generator system 1 is connected to the input side of the lithium battery 411. When the wind and solar power output is less than the power demand, the input of the generator system is connected to the output side of the lithium battery 411, thus realizing short-term power storage and regulation.

[0069] The electrochemical conversion subsystem 2 employs reversible solid oxide battery technology and consists of a reversible solid oxide battery 206. It can operate in two modes: solid oxide fuel cell (SOFC) and solid oxide electrolyzer (SOEC). When there is a power surplus, it operates in electrolysis mode, consuming the surplus power to produce hydrogen, which is stored in hydrogen storage tank 410 for backup. It can also be deeply coupled with the chemical product synthesis subsystem in terms of electrothermal mass. When there is a power shortage, it operates in fuel cell mode, consuming hydrogen in hydrogen storage tank 410 or ammonia, methane, and methanol from the chemical product layer to generate electricity to meet the system's power needs.

[0070] In the energy storage subsystem 4, the hydrogen storage tank 410 serves as a buffer to regulate the balance of hydrogen energy supply and demand within the system. In the SOEC electrolysis hydrogen production mode, the output of the electrochemical conversion subsystem 2 is connected to the input side of the hydrogen storage tank 410. In the SOFC fuel cell mode, the input of the electrochemical conversion subsystem 2 is connected to the output side of the hydrogen storage tank 410. Through hydrogen storage, chemical energy storage is achieved, realizing the medium- and long-term energy storage function.

[0071] The chemical product synthesis subsystem 3 is equipped with large-scale ammonia synthesis equipment 307, methanol synthesis equipment 308, and methane synthesis equipment 309. These devices receive electrical energy from the power generation system 1, hydrogen directly supplied by the electrochemical conversion subsystem 2, or released through the hydrogen storage tank 410, converting the energy into chemical energy in green chemical products such as ammonia, methanol, and methane, and storing it, thereby realizing the diversified and high-value utilization of renewable energy.

[0072] Example 4

[0073] like Figure 4As shown, this embodiment provides a multi-energy complementary-combined-generation zero-carbon system for a large-scale energy base based on RSOC. This system is an advanced concept for the future, as described in Embodiment 3. Its core feature is the complete abandonment of fossil fuel peak-shaving methods, relying entirely on renewable energy sources such as photovoltaics and wind power, combined with diversified energy storage and conversion technologies. The aim is to achieve 100% green power supply and zero carbon emissions during the operation of the large-scale energy base. This system also includes a power generation subsystem 1, an electrochemical conversion subsystem 2, a chemical product synthesis subsystem 3, and a diversified energy storage subsystem 4.

[0074] The fundamental difference from Example 3 is that the power generation system 1 consists only of photovoltaic panels 102 and wind power generation 103, without any fossil fuel generators. The system's output is connected to the power grid 101, has bidirectional power interaction with the electrochemical conversion subsystem 2, and directly supplies power to the chemical product synthesis subsystem 3. The lithium battery 411 in the energy storage subsystem 4 also performs short-term power balance regulation within the system.

[0075] In the context of pure renewable energy power supply, the electrochemical conversion subsystem 2 and its supporting hydrogen storage facility (hydrogen storage tank 410) become crucial. The dual-mode operation of the reversible solid oxide battery 206 becomes the core hub for balancing intraday and longer-term energy supply and demand. When there is a power surplus, its electrolysis mode converts excess green electricity into hydrogen for storage; when there is a power shortage, its fuel cell mode becomes one of the main gas sources to ensure a stable power supply for the system, working in conjunction with the short-term energy storage lithium battery 411 to jointly cope with the volatility and intermittency of renewable energy.

[0076] The large-scale ammonia synthesis unit 307, methanol synthesis unit 308, and methane synthesis unit 309 in the chemical product synthesis subsystem 3 are connected to the output of lithium battery 411 and hydrogen storage tank 410, converting hydrogen and electrical energy into chemical energy in chemical products, and then outputting the chemical products for storage or supply to the base's needs. Under the zero-carbon goal, the energy storage subsystem 4 and the chemical product synthesis subsystem 3 together constitute the only path for absorbing fluctuating green electricity and producing green fuels and chemicals, which is the key to achieving long-term energy balance and product output of the system.

[0077] Example 5

[0078] like Figure 5 As shown, this embodiment provides a multi-energy complementary and multi-generation system for a large-scale energy base based on SOEC co-electrolysis. The base-level energy system includes a power generation subsystem 1, an electrochemical conversion subsystem 2, a chemical product synthesis subsystem 3, and a multi-electrode energy storage subsystem 4.

[0079] The power generation system 1 includes photovoltaic panels 102, wind power generation 103, and coal-fired generator set 104. The output side of the power generation system 1 is connected to the power grid 101 and directly connected to the electrochemical conversion subsystem 2 and the chemical product synthesis subsystem 3. In the energy storage subsystem 4, the lithium battery 411 acts as a buffer to regulate the internal power balance of the system. When there is sufficient power, the output of the power generation system is connected to the input side of the lithium battery 411. When there is insufficient power, the input of the power generation system is connected to the output side of the lithium battery 411, realizing short-term power storage and regulation. When the lithium battery 411 cannot meet the power demand, the coal-fired generator set 104 is activated to generate electricity and maintain the power balance within the large base.

[0080] The electrochemical conversion subsystem 2 employs solid oxide electrolysis hydrogen production technology, consisting of a solid oxide electrolyzer 205 (SOEC). When the power generation system 1 has sufficient power, it generates syngas by co-electrolyzing carbon dioxide and water. This syngas is deeply coupled with the chemical product synthesis subsystem 3 and directly supplied to the methanol synthesis unit 308 and the methane synthesis unit 309, eliminating the need for a separate syngas preparation unit. The high-temperature waste heat released during the methanol / methane synthesis process is used to preheat the SOEC electrolysis reactants, forming a thermally integrated closed loop that improves system energy efficiency. The produced methane and methanol can be used to meet external chemical product demands.

[0081] Example 6

[0082] like Figure 6 As shown, this embodiment provides a multi-energy complementary and multi-generation system for a large-scale energy base based on RSOC steam electrolysis. The base-level energy system includes an electronic power generation system 1, an electrochemical conversion subsystem 2, a chemical product synthesis subsystem 3, and a multi-element energy storage subsystem 4.

[0083] The power generation system 1 includes photovoltaic panels 102, wind power generation 103, and coal-fired generator set 104. The output side of the power generation system 1 is connected to the power grid 101 and directly connected to the electrochemical conversion subsystem 2 and the chemical product synthesis subsystem 3. In the energy storage subsystem 4, the lithium battery 411 acts as a buffer to regulate the internal power balance of the system. When the power is abundant, the output of the power generation system is connected to the input side of the lithium battery 411. At the same time, the reversible solid oxide battery 206 operates in electrolysis mode to perform steam electrolysis to obtain hydrogen, which is stored in the hydrogen storage tank 410. In the ammonia synthesis equipment 307, the hydrogen and nitrogen input to the hydrogen storage tank 410 are catalytically synthesized into liquid ammonia under high temperature and high pressure using the Haber-Bosch process. In the methanol synthesis equipment 308, the hydrogen input to the hydrogen storage tank is mixed with external CO2 in proportion for external reforming to synthesize methanol. The synthesized chemical products are stored in corresponding storage tanks to supply external demand.

[0084] When power is insufficient, the electronic system input is connected to the output side of the lithium battery 411, realizing short-term power storage and regulation. When the lithium battery 411 is unable to meet the power demand, the reversible solid oxide battery 206 operates in fuel cell mode, consuming hydrogen in the hydrogen storage tank 410 or ammonia, methane, and methanol from the chemical product layer to generate electricity and maintain the power balance within the large base.

[0085] The above embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A large-scale energy base system based on SOE / RSOC multi-energy complementarity and combined heat and power generation, characterized in that: The system comprises a power generation subsystem, an electrochemical conversion subsystem, a chemical product synthesis subsystem, and an energy storage subsystem. The electrochemical conversion subsystem is in SOE or RSOC configuration. The power generation subsystem includes green energy and a coal-fired power generation unit, or only green energy. The green energy is selected from photovoltaic arrays and / or wind power generation. The output side of the power generation subsystem is connected to the power grid. The power generation subsystem and the electrochemical conversion subsystem have bidirectional power interaction, and are respectively connected to the chemical product synthesis subsystem. The electrochemical conversion subsystem and the power generation subsystem have bidirectional energy interaction with the energy storage subsystem. The RSOC configuration of the electrochemical conversion subsystem has bidirectional energy interaction with the chemical product synthesis subsystem. The energy storage subsystem includes a lithium battery and a hydrogen storage tank to regulate the internal power balance of the system. The electrochemical conversion subsystem, in the SOE configuration, performs electro-chemical conversion to achieve efficient absorption of renewable energy in the energy base; in the RSOC configuration, the reversible solid oxide battery operates in both SOFC fuel cell and SOEC electrolyzer modes, performing electro-chemical-electro-conversion to achieve efficient conversion and storage of renewable energy in the base and cross-seasonal energy balance. It can perform electro-chemical conversion in SOEC electrolyzer mode or chemical-electro-conversion in SOFC fuel cell mode. The hydrogen storage tank is used to regulate the balance of hydrogen energy supply and demand within the system. In the electrolysis mode of SOE or RSOC configuration, the output of the electrochemical conversion subsystem is connected to the input side of the hydrogen storage tank. In the fuel cell mode of ROSC configuration, the input of the electrochemical conversion subsystem is connected to the output side of the hydrogen storage tank. By storing hydrogen, chemical energy is stored, realizing the medium- and long-term energy storage function. The chemical product synthesis subsystem includes any one or any combination of ammonia synthesis equipment, methanol synthesis equipment, and methane synthesis equipment. All of these are connected to the output of the electrochemical conversion subsystem in the SOE and RSOC configurations of the electrolysis mode and the energy storage subsystem. This converts the chemical energy and electrical energy in hydrogen or synthesis gas into the chemical energy in the chemical products, and stores the output of the chemical products to achieve a stable output of the chemical products. The output of the chemical product synthesis subsystem can also be connected to the input of the electrochemical conversion subsystem to convert the chemical energy in any one or any combination of ammonia, methanol, and methane into electrical energy through the RSOC configuration fuel cell mode to supply electricity demand.

2. The SOE / RSOC-based multi-energy complementary-multi-generation energy base system according to claim 1, characterized in that: The electrochemical conversion subsystem includes two operating modes: co-electrolysis and steam electrolysis. In co-electrolysis mode, a solid oxide electrolyzer simultaneously electrolyzes water vapor and carbon dioxide to directly generate syngas, which is then fed into the chemical product synthesis subsystem to synthesize methane and methanol. In steam electrolysis mode, a solid oxide electrolyzer electrolyzes water vapor, and the generated hydrogen is fed into the hydrogen storage tank of the energy storage subsystem for subsequent hydrogen use or directly fed into the chemical product synthesis subsystem to produce ammonia, methane, or methanol.

3. The SOE / RSOC-based multi-energy complementary-multi-generation energy base system according to claim 2, characterized in that: In the SOE configuration of the steam electrolysis subsystem, the solid oxide electrolyzer is connected to the output of the power generation system and the input of the energy storage subsystem. It converts electrical energy into hydrogen energy and stores the hydrogen in the hydrogen storage tank for long-term storage. Alternatively, the hydrogen can be fed into the chemical product synthesis subsystem for external reforming to obtain syngas, which is then used to synthesize methane and methanol, and finally ammonia via the Haber process. In the SOE configuration of the co-electrolysis subsystem, the solid oxide electrolyzer is deeply coupled with the chemical product synthesis subsystem to obtain syngas through co-electrolysis. This syngas is then fed into the chemical product synthesis subsystem to synthesize methane and methanol.

4. The SOE / RSOC-based multi-energy complementary-multi-generation energy base system according to claim 2, characterized in that: In the RSOC configuration, the electrochemical conversion subsystem is bidirectionally interacted with the reversible solid oxide battery, the energy storage subsystem, and the power generation system. In SOFC power generation mode, it is connected to the input of the power generation system and to the output of the energy storage subsystem or the chemical product synthesis subsystem, converting chemical energy into electrical energy to supply the power load of the large base system. In SOE electrolysis mode, the reversible solid oxide battery is connected to the output of the power generation system and the input of the energy storage subsystem for co-electrolysis or steam electrolysis. During steam electrolysis, electrical energy is converted into hydrogen energy, and the hydrogen is stored in the hydrogen storage tank for medium- to long-term storage. Alternatively, the hydrogen can be fed into the chemical product synthesis subsystem to obtain syngas through external reforming, which is then used to synthesize methane and methanol, and ammonia can be synthesized through the "Haber process". In SOE electrolysis mode, the reversible solid oxide battery can be deeply coupled with the chemical product synthesis subsystem for thermo-mass-electrical coupling during co-electrolysis. Syngas is obtained through co-electrolysis and then fed into the chemical product synthesis subsystem to synthesize methane and methanol.

5. An operation method for a large-scale energy base system based on SOE / RSOC multi-energy complementarity and combined heat and power as described in any one of claims 1 to 4, characterized in that: When the green energy output exceeds the electricity demand, hydrogen or syngas is produced in the electrochemical conversion subsystem under the RSOC and SOE configuration in electrolysis mode. The chemical product synthesis subsystem produces chemical products through electrical energy and chemical energy, achieving a stable output of chemical products. When the output of the green energy source is less than the electricity demand, the electrochemical conversion subsystem in the RSOC configuration operates in fuel cell mode, producing electricity by consuming hydrogen, ammonia, methane or methanol to supply the electricity demand.

6. The operating method according to claim 5, characterized in that: In the SOE configuration, the green energy is the main power input of the large base. The coal-fired power generation unit and the lithium battery play a peak-shaving role, working together to meet the power demand and maintain the power stability of the large base. When the output of the green energy exceeds the power demand, the output of the coal-fired power generation unit is reduced, and the surplus power is absorbed by the lithium battery and solid oxide electrolyzer. When there is still a surplus of power, the surplus power can be connected to the grid to supply the external power demand. The electrochemical conversion subsystem has two operating modes. In co-electrolysis mode, the solid oxide electrolyzer can be deeply coupled with the chemical product synthesis subsystem to absorb excess electricity and co-electrolyze water and carbon dioxide to obtain syngas. The syngas is then fed into the chemical product synthesis subsystem to synthesize methane and methanol, thereby improving system efficiency. In steam electrolysis mode, the solid oxide electrolyzer is connected to the output of the power generation system and the input of the energy storage subsystem to convert electrical energy into hydrogen energy. The hydrogen is then stored in the hydrogen storage tank for long-term storage, or the hydrogen is fed into the chemical product synthesis subsystem to obtain syngas through external reforming and then synthesize methane and methanol, which are then synthesized into ammonia via the "Haber process". When the output of green energy is less than the demand for electricity, in order to ensure the stable output of chemical products from the energy base, an operational strategy optimized according to different objectives is adopted to coordinate the release of electricity from lithium batteries and the load increase of coal-fired power generation units, thereby maintaining the power balance within the base and achieving the stable output of electricity-hydrogen-ammonia-alkanes-alcohols from the base.

7. The operating method according to claim 5, characterized in that: In the RSOC configuration, the green energy is the main power input of the large base. The RSOC fuel cell mode, coal-fired generator set and lithium battery play the role of peak shaving, working together to meet the power demand and maintain the power stability of the large base. When the output of the green energy exceeds the power demand, the output of the coal-fired generator set is reduced, and the surplus power is absorbed by the lithium battery and RSOC electrolysis mode. When there is still a surplus of power, the surplus power is fed into the grid to supply the external power demand. In electrolysis mode, the RSOC performs co-electrolysis or steam electrolysis. During co-electrolysis, the RSOC is deeply coupled with the chemical product synthesis subsystem to absorb excess electricity. Water and carbon dioxide are co-electrolyzed to obtain syngas, which is then fed into the chemical product synthesis subsystem to synthesize methane and methanol, thereby improving system efficiency. In steam electrolysis mode, the RSOC is connected to the output of the power generation system and the input of the energy storage subsystem to convert electrical energy into hydrogen energy. The hydrogen is then stored in the hydrogen storage tank for long-term storage, or the hydrogen is fed into the chemical product synthesis subsystem to obtain syngas through external reforming, which is then used to synthesize methane and methanol, and ammonia is synthesized through the "Haber process". When the output of green energy is less than the demand for electricity, in order to ensure the stable output of chemical products from the energy base, an operational strategy optimized according to different objectives is adopted. This strategy coordinates the release of electricity from lithium batteries, the load increase of coal-fired power generation units, and the power generation of RSOC in fuel cell mode. This maintains the power balance within the energy base and enables the energy base to output electricity-hydrogen-ammonia-alkanes-alcohols stably.

8. The operating method according to claim 6 or 7, characterized in that: In the large base of SOE configuration: When the output of green energy exceeds the electricity demand, the output of coal-fired power generating units is reduced, and the surplus electricity is consumed through lithium batteries and solid oxide electrolyzers. If there is still a surplus of electricity, it can be fed into the grid to supply external electricity demand. The electrochemical conversion subsystem consumes the surplus electricity through co-electrolysis or steam electrolysis and is connected to the chemical product synthesis subsystem to prepare chemical products. When the output of green energy is less than the electricity demand, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different economic, environmental and safety objectives is adopted to coordinate the release of electricity from lithium batteries and the load increase of coal-fired power generating units, thereby maintaining the power balance within the energy base and realizing the stable output of electricity-hydrogen-ammonia-alkanes-alcohols from the energy base. In the large base of the RSOC configuration: When the output of green energy exceeds the electricity demand, the output of coal-fired power generating units is reduced, and the surplus electricity is consumed through lithium batteries and RSOC electrolysis mode. If there is still surplus electricity, it can be fed into the grid to supply external electricity demand. The electrochemical conversion subsystem consumes surplus electricity through co-electrolysis or steam electrolysis in electrolysis mode, and is connected to the chemical product synthesis subsystem to prepare chemical products. The hydrogen produced by steam electrolysis is stored in the hydrogen storage tank of the energy storage subsystem, undertaking the function of long-term energy storage. When the output of green energy is less than the electricity demand, in order to ensure the stable output of chemical products from the energy base, an operation strategy optimized according to different economic, environmental and safety objectives is adopted. This strategy coordinates the release of electricity from lithium batteries, the load increase of coal-fired power generating units and the power generation of RSOC in fuel cell mode, thereby maintaining the power balance within the energy base and realizing the stable output of electricity-hydrogen-ammonia-alkanes-ols from the energy base.

Images