Wind, light, hydrogen storage and fuel gas integrated multi-energy coordination system and method for smart power grid

Abstract

The invention provides a wind-light hydrogen-storage-fuel integrated multi-energy coordination system and method for a smart power grid, and belongs to the technical field of electric power engineering, and the system comprises a wind power generation system which is used for capturing wind energy and converting the wind energy into electric energy, and providing renewable power for the whole system; the photovoltaic power generation system is used for converting solar energy into electric energy; the long-time energy storage system is used for storing redundant electric energy; the green electricity hydrogen production and pressurized hydrogen storage system is used for producing hydrogen by utilizing renewable electricity and carrying out pressurized storage; the hydrogen combustion gas turbine power generation system is used for combusting the stored hydrogen and converting the hydrogen into electric energy; and the flue gas waste heat type lithium bromide system is used for receiving the high-temperature flue gas, extracting heat energy of the flue gas to cool and heat water, and providing refrigeration and heating services for terminal users. By integrating wind, light, hydrogen energy, the new-generation gas turbine and the standby peak shaving power plant, multi-energy cooperative utilization is achieved, and the efficiency, safety, stability and flexibility of the energy system are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of electric power engineering technology, and in particular to a wind-solar-hydrogen-storage-combustion integrated multi-energy coordination system and method for a smart grid. Background Art

[0002] At present, various new forms of energy supply are rapidly emerging, and the energy revolution is accelerating. The world today is in an era where new energy represented by wind power, photovoltaics, energy storage, hydrogen energy, hydrogen-fired gas turbines, etc. and zero-carbon technology are resonating at the same frequency. Zero-carbon electricity, zero-carbon transportation, zero-carbon buildings, zero-carbon chemicals, zero-carbon agriculture, zero-carbon villages, etc. are creating a new map of a zero-carbon future. With the rapid development of new energy such as wind power and photovoltaics, the production of hydrogen energy through green electricity is becoming an important way to solve the volatility and intermittency of renewable energy in the future. Green hydrogen has attracted attention from the new energy industry. Wind power, photovoltaics, energy storage, hydrogen energy, and hydrogen-fired gas turbine technologies will go hand in hand, and the coupled development of hydrogen energy with wind power, photovoltaics, and hydrogen-fired gas turbines has become a focus of attention.

[0003] Publication No. CN117713228A provides a multi-energy coordinated optimization method and system for a wind-solar-hydrogen energy storage system, which involves the field of power grid economic analysis and evaluation, including constructing the equipment capacity of the hydrogen energy storage system and the operation mode of the wind-solar-hydrogen energy storage station, and considering the operation constraints of the wind-solar-hydrogen energy storage station; establishing a revenue model, a cost model and a net revenue model based on the wind-solar-hydrogen energy storage system, and considering the various benefits of the wind-solar-hydrogen energy storage station; analyzing the impact of the wind-solar-hydrogen energy storage station's full life cycle economy on the payback period and the full life cycle net profit through simulation experiments, and obtaining the wind-solar-hydrogen energy storage station's full life cycle economic evaluation results. The present invention proposes a wind-solar-hydrogen energy storage station's full life cycle economic evaluation method, obtains the wind-solar-hydrogen energy storage station's economic evaluation results throughout its life cycle, helps to verify the feasibility of the implementation of the wind-solar-hydrogen energy storage station, and provides technical theoretical support and guidance for the engineering cost analysis of the wind-solar-hydrogen energy storage station. However, the above scheme only realizes the conversion and utilization between wind and solar power and hydrogen storage, and does not fully consider the integration and coordinated utilization of new-generation gas turbines, backup peak-shaving coal-fired power plants, and end-user multi-energy demands, thereby limiting the efficiency, safety, stability and flexibility of the overall energy system. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide an integrated wind, solar, hydrogen storage and combustion multi-energy coordination system and method for a smart grid. By integrating wind, solar, hydrogen energy, a new generation of gas turbines and standby peak-shaving power plants, the coordinated utilization of multiple energy sources is achieved, significantly improving the efficiency, safety, stability and flexibility of the energy system.

[0005] To achieve the above object, the present invention provides the following solutions: A wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid, comprising: Wind power generation system, used to capture wind energy and convert it into electrical energy, providing renewable electricity for the overall system; Photovoltaic power generation systems, which are used to convert solar energy into electricity to supplement the power supply of wind power generation systems; Long-duration energy storage system, used to store excess electricity to provide power support during periods of insufficient wind and solar power generation; Green electricity hydrogen production and pressurized hydrogen storage system, used to produce hydrogen using renewable electricity and store it under pressure; A hydrogen-fired gas turbine power generation system that burns stored hydrogen and converts it into electricity, providing a stable power output; The flue gas waste heat type lithium bromide system is used to receive high-temperature flue gas and extract the heat energy of the flue gas for cooling and heating of water, providing refrigeration and heating services for end users.

[0006] Preferably, the wind power generation system and the photovoltaic power generation system are connected to the booster station and the long-term energy storage system through power supply lines, the long-term energy storage system is connected to the booster station, and the booster station transmits the electric energy to the end user through the power transmission and step-down station.

[0007] Preferably, the green electricity hydrogen production and pressurized hydrogen storage system consists of a green electricity hydrogen production unit, a boosting unit and a hydrogen storage unit. The wind power generation system and the photovoltaic power generation system are connected to the green electricity hydrogen production unit. The boosting unit is provided at the output end of the green electricity hydrogen production unit, and the hydrogen storage unit is provided at one end of the boosting unit. The boosting unit pressurizes low-pressure hydrogen into high-pressure hydrogen and transmits it to the hydrogen storage unit.

[0008] Preferably, the output side of the hydrogen storage unit is provided with the hydrogen-fired gas turbine power generation system, and the hydrogen-fired gas turbine power generation system consists of a combustion chamber unit, a turbine unit, a compressor unit and a generator unit. The air inlet end of the combustion chamber unit is communicated with the air outlet end of the compressor unit, and the air inlet end of the compressor unit is connected to the air. The generator unit is provided on one side of the compressor unit, and the turbine unit is provided on the other side of the compressor unit. The air inlet end of the turbine unit is communicated with the air outlet end of the combustion chamber, and the air outlet end of the turbine unit is connected to the flue gas waste heat type lithium bromide system.

[0009] Preferably, the combustion chamber unit is connected to a hydrogen storage unit, and the hydrogen storage unit is used to provide high-pressure hydrogen to the combustion chamber unit for high-temperature combustion; the generator unit converts combustion heat energy into electrical energy, and transmits the electrical energy to the end user through the power supply line via the power transmission and step-down station.

[0010] Preferably, the turbine unit transmits the high-temperature flue gas generated by the combustion chamber unit to a flue gas waste heat type lithium bromide system, and the flue gas waste heat type lithium bromide system is connected to the end user through a circulation pipeline.

[0011] Preferably, the system also includes a backup / peaking coal-fired power plant to provide additional heat and electricity supply during peak end-user demand.

[0012] The present invention also provides an operation method of the wind-solar-hydrogen-storage-combustion integrated multi-energy coordination system using the above-mentioned smart grid, comprising the following steps: S1. Provide electric energy to end users through the power grid through the wind power generation system and the photovoltaic power generation system. If the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the long-term energy storage system; S2. If the energy storage capacity of the long-term energy storage system is full, and the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the green power hydrogen production unit for hydrogen production, and the hydrogen is stored in the hydrogen storage unit through the booster unit; S3. If the power generation of the wind power generation system and the photovoltaic power generation system is less than the power load required by the end user, the long-term energy storage system supplies power to the grid until the energy storage capacity of the long-term energy storage system drops below the threshold that cannot sustain the power load of the end user for 15 minutes; S4. If the energy storage capacity of the long-term energy storage system is below the 15-minute threshold of the end-user's power load, the hydrogen-fired gas turbine power generation system is put into operation to supply power to the grid, and the flue gas waste heat lithium bromide system is used to supply cooling and heating to the end-user; S5. In the event of an extreme disaster, the standby / peaking coal-fired power plant is put into use in the power grid, and during the period when the standby / peaking coal-fired power plant is started, the hydrogen storage unit and the hydrogen-fired gas turbine power generation system are operated simultaneously to supply power to the power grid to meet the energy needs of end users.

[0013] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects: (1) The present invention has the characteristics of efficient utilization of green energy. By coupling multiple green energy sources such as wind energy, solar energy and hydrogen energy, it can achieve comprehensive and efficient utilization of energy, reduce dependence on fossil fuels, and thus reduce greenhouse gas emissions. At the same time, the present invention combines the respective advantages of wind energy, solar energy, hydrogen energy and hydrogen-fired gas turbines, flexibly allocates electricity under different electricity demand and supply conditions, and improves the stability and reliability of the power grid system.

[0014] (2) The present invention is based on the large volatility of wind and solar energy, the stable base load power provided by hydrogen-fired gas turbines, and hydrogen energy as an energy storage medium, thereby balancing energy supply and demand and improving the efficiency of the overall energy system. By on-site electrolysis and hydrogen storage, the safety and economy of hydrogen energy utilization are ensured, and hydrogen-fired gas turbines are used to generate electricity, thus achieving cascade utilization of energy and improving the comprehensive utilization efficiency of energy.

[0015] (3) The present invention realizes the overall design and optimization of wind energy, solar energy, hydrogen energy and hydrogen-fired gas turbine systems. Through the application of intelligent control systems, it ensures the dynamic management of energy flow, improves the safety and stability of the power grid, and realizes green and low-carbon transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a structural diagram of a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment 1 like Figure 1 As shown, the present invention provides a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid, comprising: Wind power generation system, used to capture wind energy and convert it into electrical energy, providing renewable electricity for the overall system; Photovoltaic power generation systems, which are used to convert solar energy into electricity to supplement the power supply of wind power generation systems; Long-duration energy storage system, used to store excess electricity to provide power support during periods of insufficient wind and solar power generation; Green electricity hydrogen production and pressurized hydrogen storage system, used to produce hydrogen using renewable electricity and store it under pressure; A hydrogen-fired gas turbine power generation system that burns stored hydrogen and converts it into electricity, providing a stable power output; The flue gas waste heat type lithium bromide system is used to receive high-temperature flue gas and extract the heat energy of the flue gas for cooling and heating of water, providing refrigeration and heating services for end users.

[0021] As a preferred implementation of the above embodiment, the wind power generation system and the photovoltaic power generation system are connected to the booster station and the long-term energy storage system through power supply lines. The long-term energy storage system is connected to the booster station, and the booster station transmits the electric energy to the end user through the power transmission and step-down station.

[0022] As a preferred implementation of the above-mentioned embodiment, the green electricity hydrogen production and pressurized hydrogen storage system consists of a green electricity hydrogen production unit, a boosting unit and a hydrogen storage unit. The wind power generation system and the photovoltaic power generation system are connected to the green electricity hydrogen production unit. The output end of the green electricity hydrogen production unit is provided with a boosting unit, and one end of the boosting unit is provided with a hydrogen storage unit. The boosting unit pressurizes the low-pressure hydrogen into high-pressure hydrogen and transmits it to the hydrogen storage unit.

[0023] As a preferred implementation of the above embodiment, a hydrogen-fired gas turbine power generation system is provided on the output side of the hydrogen storage unit. The hydrogen-fired gas turbine power generation system consists of a combustion chamber unit, a turbine unit, a compressor unit and a generator unit. The air inlet end of the combustion chamber unit is communicated with the air outlet end of the compressor unit, the air inlet end of the compressor unit is connected to the air, a generator unit is provided on one side of the compressor unit, and a turbine unit is provided on the other side of the compressor unit. The air inlet end of the turbine unit is communicated with the air outlet end of the combustion chamber, and the air outlet end of the turbine unit is connected to the flue gas waste heat type lithium bromide system.

[0024] As a preferred implementation of the above embodiment, the combustion chamber unit is connected to the hydrogen storage unit, and the hydrogen storage unit is used to provide high-pressure hydrogen to the combustion chamber unit for high-temperature combustion; the generator unit converts the combustion heat energy into electrical energy, and transmits the electrical energy to the end user through the power supply line via the power transmission and step-down station.

[0025] As a preferred implementation of the above embodiment, the turbine unit transmits the high-temperature flue gas generated by the combustion chamber unit to the flue gas waste heat type lithium bromide system, and the flue gas waste heat type lithium bromide system is connected to the end user through a circulation pipeline.

[0026] As a preferred implementation of the above embodiment, the system also includes a backup / peaking coal-fired power plant for providing additional heat and electricity supply when the end-user demand peaks.

[0027] According to the wind, solar, hydrogen storage and combustion integrated multi-energy coordination system of the smart grid provided above, its operation method includes the following steps: S1. Provide electric energy to end users through the power grid through the wind power generation system and the photovoltaic power generation system. If the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the long-term energy storage system; S2. If the energy storage capacity of the long-term energy storage system is full, and the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the green power hydrogen production unit for hydrogen production, and the hydrogen is stored in the hydrogen storage unit through the booster unit; S3. If the power generation of the wind power generation system and the photovoltaic power generation system is less than the power load required by the end user, the long-term energy storage system supplies power to the grid until the energy storage capacity of the long-term energy storage system drops below the threshold that cannot sustain the power load of the end user for 15 minutes; S4. If the energy storage capacity of the long-term energy storage system is below the 15-minute threshold of the end-user's power load, the hydrogen-fired gas turbine power generation system is put into operation to supply power to the grid, and the flue gas waste heat lithium bromide system is used to supply cooling and heating to the end-user; S5. In the event of an extreme disaster, the standby / peaking coal-fired power plant is put into use in the power grid, and during the period when the standby / peaking coal-fired power plant is started, the hydrogen storage unit and the hydrogen-fired gas turbine power generation system are operated simultaneously to supply power to the power grid to meet the energy needs of end users.

[0028] Therefore, the above-mentioned smart grid integrated wind, solar, hydrogen storage and combustion multi-energy coordination system and method is adopted, which realizes the coordinated utilization of multiple energy sources by integrating wind, solar, hydrogen energy, a new generation of gas turbines and standby peak-shaving power plants, and significantly improves the efficiency, safety, stability and flexibility of the energy system.

[0029] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid, characterized in that: include: Wind power generation system, used to capture wind energy and convert it into electrical energy, providing renewable electricity for the overall system; Photovoltaic power generation systems, which are used to convert solar energy into electricity to supplement the power supply of wind power generation systems; Long-duration energy storage system, used to store excess electricity to provide power support during periods of insufficient wind and solar power generation; Green electricity hydrogen production and pressurized hydrogen storage system, used to produce hydrogen using renewable electricity and store it under pressure; A hydrogen-fired gas turbine power generation system that burns stored hydrogen and converts it into electricity, providing a stable power output; The flue gas waste heat type lithium bromide system is used to receive high-temperature flue gas and extract the heat energy of the flue gas for cooling and heating of water, providing refrigeration and heating services for end users.

2. According to claim 1, a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid is characterized in that: The wind power generation system and the photovoltaic power generation system are connected to the booster station and the long-term energy storage system through power supply lines. The long-term energy storage system is connected to the booster station, and the booster station transmits the electric energy to the end user through the power transmission and step-down station.

3. According to claim 2, a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid is characterized in that: The green electricity hydrogen production and pressurized hydrogen storage system consists of a green electricity hydrogen production unit, a boosting unit and a hydrogen storage unit. The wind power generation system and the photovoltaic power generation system are connected to the green electricity hydrogen production unit. The boosting unit is provided at the output end of the green electricity hydrogen production unit, and the hydrogen storage unit is provided at one end of the boosting unit. The boosting unit pressurizes low-pressure hydrogen into high-pressure hydrogen and transmits it to the hydrogen storage unit.

4. According to claim 3, a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid is characterized in that: The output side of the hydrogen storage unit is provided with the hydrogen-fired gas turbine power generation system, and the hydrogen-fired gas turbine power generation system consists of a combustion chamber unit, a turbine unit, a compressor unit and a generator unit. The air inlet end of the combustion chamber unit is communicated with the air outlet end of the compressor unit, and the air inlet end of the compressor unit is connected to the air. The generator unit is provided on one side of the compressor unit, and the turbine unit is provided on the other side of the compressor unit. The air inlet end of the turbine unit is communicated with the air outlet end of the combustion chamber, and the air outlet end of the turbine unit is connected to the flue gas waste heat type lithium bromide system.

5. According to claim 4, a wind, solar, hydrogen storage and combustion integrated multi-energy coordination system for a smart grid is characterized in that: The combustion chamber unit is connected to a hydrogen storage unit, and the hydrogen storage unit is used to provide high-pressure hydrogen to the combustion chamber unit for high-temperature combustion; the generator unit converts combustion heat energy into electrical energy, and transmits the electrical energy to the end user through the power supply line via the power transmission and step-down station.

6. The wind, solar, hydrogen storage and combustion integrated multi-energy coordination system of a smart grid according to claim 5 is characterized in that: The turbine unit transmits the high-temperature flue gas generated by the combustion chamber unit to the flue gas waste heat type lithium bromide system, and the flue gas waste heat type lithium bromide system is connected to the end user through a circulation pipeline.

7. The wind, solar, hydrogen storage and combustion integrated multi-energy coordination system of a smart grid according to claim 1 is characterized in that: The system also includes a backup / peaking coal-fired power plant to provide additional heat and electricity supply during peak end-user demand.

8. An operation method of a wind-solar-hydrogen-storage-combustion integrated multi-energy coordination system of a smart grid based on any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Provide electric energy to end users through the power grid through the wind power generation system and the photovoltaic power generation system. If the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the long-term energy storage system; S2. If the energy storage capacity of the long-term energy storage system is full, and the power generation of the wind power generation system and the photovoltaic power generation system is greater than the power load required by the end user, the remaining power generation is transmitted to the green power hydrogen production unit for hydrogen production, and the hydrogen is stored in the hydrogen storage unit through the booster unit; S3. If the power generation of the wind power generation system and the photovoltaic power generation system is less than the power load required by the end user, the long-term energy storage system supplies power to the grid until the energy storage capacity of the long-term energy storage system drops below the threshold that cannot sustain the power load of the end user for 15 minutes; S4. If the energy storage capacity of the long-term energy storage system is below the 15-minute threshold of the end-user's power load, the hydrogen-fired gas turbine power generation system is put into operation to supply power to the grid, and the flue gas waste heat lithium bromide system is used to supply cooling and heating to the end-user; S5. In the event of an extreme disaster, the standby / peaking coal-fired power plant is put into use in the power grid, and during the period when the standby / peaking coal-fired power plant is started, the hydrogen storage unit and the hydrogen-fired gas turbine power generation system are operated simultaneously to supply power to the power grid to meet the energy needs of end users.

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