Hydrogenation charging station energy supply system based on renewable energy sources
By designing a renewable energy supply system in a hydrogen refueling charging station, using resources such as wind power generation, photovoltaic power generation and hydrogen energy, the mutual conversion and mutual complementation of electricity and hydrogen energy are achieved, and the energy of hydrogen refueling stations and charging stations is solved. The problem of low carbon supply and unbalanced site layout improves the stability and inclusiveness of the system.
Patent Information
- Application Number
- CN202421066244.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-16
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-16
Smart Images
Figure CN222496091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of hydrogenation and charging of new energy vehicles, and in particular to an energy supply system for a hydrogenation and charging station based on renewable energy. Background Art
[0002] In the process of implementing the "dual carbon" strategy, energy, as the area with the largest emissions, will be the key to green and low-carbon energy supply. At present, the country is vigorously developing the new energy vehicle industry, and accelerating the construction of new energy vehicle infrastructure is an important part of promoting the promotion and use of new energy vehicles.
[0003] The current construction of hydrogen refueling stations and charging stations is too dependent on the power support of the large power grid, but the construction layout characteristics of the power grid do not fully match the layout of hydrogen refueling stations and charging stations. It is difficult to balance the economic efficiency of improving the power grid construction for the construction of hydrogen refueling stations and charging stations. At the same time, hydrogen refueling stations and charging stations have problems such as low-carbon energy supply and unbalanced station layout. Especially in remote villages and towns, along highways, etc., hydrogen refueling stations and charging stations have not achieved effective coverage, which has limited the use and development of hydrogen energy vehicles and rechargeable vehicles to a certain extent. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art that the energy supply of hydrogen refueling stations and charging stations is not low-carbon, the station layout is unbalanced, and it is difficult to balance the economic efficiency of mutual construction, and to provide a hydrogen refueling and charging station energy supply system based on renewable energy.
[0005] The utility model adopts a technical solution to solve the technical problem, which is a hydrogen refueling charging station energy supply system based on renewable energy, including an AC system, a DC system, a hydrogen energy system and a hydrogen refueling charging station centralized control center.
[0006] Furthermore, the AC system includes an AC bus, an external line, a wind turbine, a transformer, an energy storage battery I, a PCS I, an AC / DC, a DC / AC, a PCS II converter, an AC load and an AC charging pile, and the AC system adopts a single bus wiring form.
[0007] Furthermore, the DC system includes a DC bus, photovoltaic modules, DC / DC I, energy storage batteries II, DC / DC II, DC loads and DC charging piles; the DC bus of the DC system is connected to the AC bus of the AC system through a PCS II converter, and the DC system adopts a single bus connection form.
[0008] Furthermore, the hydrogen energy system includes an external hydrogen energy supply, an electric hydrogen production device, a hydrogen storage device, a hydrogen energy combined heat and power supply equipment, a hydrogenator, a pipeline and a cold and hot load. The electric hydrogen production device of the hydrogen energy system is connected to the AC bus of the AC system through AC / DC, and the hydrogen energy combined heat and power supply equipment of the hydrogen energy system is connected to the AC bus of the AC system through DC / AC.
[0009] Furthermore, the hydrogen energy combined heat and power equipment includes hydrogen fuel cell combined heat and power and hydrogen generator combined heat and power.
[0010] Furthermore, the AC system is connected to an external power supply via an external line.
[0011] Furthermore, the hydrogen energy system communicates hydrogen energy with the outside via external hydrogen energy supply.
[0012] Furthermore, the centralized control center of the hydrogen refueling and charging station coordinates the operation of the AC system, the DC system, and the hydrogen energy system. The DC system gives priority to the energy supply of the DC load, the DC charging pile, and the energy storage battery II. When the DC system has excess power, the DC system supplies power to the AC system. The AC system gives priority to the energy supply of the AC load, the AC charging pile, and the energy storage battery I, and supplies power to the DC system when the DC system is out of power.
[0013] In summary, the utility model has the following beneficial technical effects:
[0014] The utility model technology includes an AC system, a DC system, a hydrogen energy system and a hydrogen refueling charging station control center. The DC system and the hydrogen energy system are connected to the AC system respectively. Through the above structure, a hydrogen refueling charging station energy supply system based on renewable energy is established. The utility model technology makes full use of renewable energy such as wind power generation, photovoltaic power generation, hydrogen energy, etc., to provide hydrogen refueling and charging services for hydrogen energy vehicles and electric vehicles, and realize zero-carbon environmental protection in the entire chain of energy supply, transportation and use. The utility model technology converts the fluctuating excess electric energy into hydrogen energy storage, and then replenishes the missing electric energy with stable hydrogen energy, realizes the mutual conversion between AC and DC electric energy and hydrogen energy, and reduces the peak and fills the valley for electric energy, complements the energy advantages, and improves the stability and inclusive flexibility of the system. By adopting the hydrogen refueling charging station control center, according to the various operating requirements and control strategies of the hydrogen refueling charging station, it not only provides hydrogen refueling and charging services for new energy vehicles, but also provides comprehensive energy support of hydrogen energy and electric energy for the surrounding weak energy supply areas, improves the regional energy self-sufficiency and storage and consumption capacity, and the comprehensive benefits of the hydrogen refueling charging station are better. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of an embodiment of a hydrogen charging station energy supply system based on renewable energy of the utility model;
[0016] Figure 2The utility model is an operation control flow chart of an embodiment of a hydrogen charging station energy supply system based on renewable energy.
[0017] Description of the accompanying symbols:
[0018] P g — Photovoltaic module power generation, P z —DC load, P zc —DC charging pile load, P cz —Charge capacity of energy storage battery II, -P cz —Energy storage battery II discharge capacity, P x —Power supply from DC system to AC system, P x —Power supply from AC system to DC system, P f —Wind turbine power generation, P j —AC load, P jc —AC charging pile, P cj —Energy storage battery I charge capacity, P cj —Energy storage battery I discharge capacity, P w —External line power supply, Q j —Hydrogenation machine, Q w —External hydrogen supply can provide hydrogen quantity. DETAILED DESCRIPTION
[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] Reference Figure 1 and Figure 2 , this embodiment includes an AC system, a DC system, a hydrogen energy system and a centralized control center for hydrogen refueling and charging stations. Among them, the AC system consists of an AC bus, an external line, a wind turbine, a transformer, an energy storage battery I, a PCS I, an AC / DC, a DC / AC, a PCS II converter, an AC load and an AC charging pile, the DC power supply system consists of a DC bus, a photovoltaic module, a DC / DC I, an energy storage battery II, a DC / DC II, a DC load and a DC charging pile, the hydrogen energy system consists of an external hydrogen energy supply, an electric hydrogen production device, a hydrogen storage device, a hydrogen energy combined heat and power supply equipment, a hydrogen refueling machine, a pipeline and a heat and cold load, and the centralized control center for hydrogen refueling and charging stations coordinates the operation of the AC system, the DC system and the hydrogen energy system.
[0021] Specifically, the external lines, AC / DC, DC / AC, PCSⅡ converter, AC load and AC charging pile of the AC system are connected to the AC bus, the wind turbine is connected to the AC bus through a transformer, and the energy storage battery I is connected to the AC bus through the PCSⅠ converter; the DC charging pile and DC load of the DC system are connected to the DC bus, the photovoltaic module is connected to the DC bus through DC / DCⅠ, and the energy storage battery II is connected to the DC bus through DC / DCⅡ. The DC system is connected to the AC bus of the AC system through the PCSⅡ converter.
[0022] The hydrogen energy system's external hydrogen energy supply, electric hydrogen production device, hydrogen energy combined heat and power equipment, and hydrogen filling machine are connected to the hydrogen storage device through pipelines; the hydrogen energy system's electric hydrogen production device is connected to the AC system's AC bus through AC / DC; the hydrogen energy system's hydrogen energy combined heat and power equipment is connected to the AC system's AC bus through DC / AC and to the cold and hot loads; the AC system is connected to the external power supply through an external line, and the hydrogen energy system communicates hydrogen energy with the outside through the external hydrogen energy supply.
[0023] As the brain of the hydrogen refueling and charging station energy supply system based on renewable energy, the hydrogen refueling and charging station control center coordinates the operation of the AC system, DC system and hydrogen energy system according to the power supply of wind power and photovoltaic power generation, the energy consumption of hydrogen refueling and charging and load, the external supply of electricity and hydrogen energy, and the energy and hydrogen storage conditions.
[0024] The specific strategies are as follows:
[0025] 1. The centralized control center of the hydrogen refueling and charging station adopts the principle of determining AC by DC, determining hydrogen by electricity, and supplementing electricity with hydrogen. The DC system gives priority to the energy supply of DC loads and DC charging piles. When the DC system has excess power, the DC system supplies power to the AC system; when the DC system is short of power, the AC system supplies power to the DC system. The AC system gives priority to the energy supply of AC loads and AC charging piles. When the AC system has excess power, hydrogen energy is generated through an electric hydrogen production device and stored in a hydrogen storage device. The hydrogen energy system gives priority to ensuring the supply of hydrogen energy to the hydrogen refueling machine, and always ensures that the hydrogen storage system is above the set storage capacity; when the AC system is short of power, the hydrogen energy combined heat and power equipment is used to supply power to the AC system, and at the same time supply energy to the cold and hot loads in the station.
[0026] 2. Photovoltaic Module P in DC System g As a power source, when the photovoltaic power generation is sufficient, it can supply power to the DC charging pile. zc , supplying power to DC load P z , charging the energy storage battery II P cz , after identification of P g >P z +P zc +P cz , excess power P xThe PCSⅡ inverter will supply power to the AC bus; when the photovoltaic module does not generate power or is insufficient, it will be judged that P g <P z +P zc -P cz , the AC system will be used as the power source to supply power to the DC system through the PCSⅡ converter - P x Energy storage battery II is used as an energy storage unit to charge and discharge electricity and to smooth out fluctuations in photovoltaic power generation.
[0027] 3. Wind turbine generator P in AC system f As a power source, it can supply power to the AC charging pile when the power generation is sufficient. jc , supplying power to AC load P j , charging the energy storage battery I P cj , to supply power to the external circuit P w , after identification of P f >P j +P jc +P cj +P w -P x The excess electric energy is used to generate hydrogen energy through the electric hydrogen production device and stored in the hydrogen storage device; the energy storage battery I is used as an electric energy storage unit to charge and discharge electric energy and to smooth the fluctuations of wind power generation.
[0028] 4. As the energy-containing body of the hydrogen refueling station, the hydrogen energy system is mainly used to convert excess electrical energy into hydrogen energy and store it. The hydrogen storage device is used as a hydrogen energy storage unit to store the hydrogen energy generated by the electric hydrogen production device from excess electrical energy. The hydrogen storage device provides hydrogen energy according to the needs of the hydrogen refueling machine and external hydrogen energy supply. When the AC system is short of power, after determining P f <P j +P jc -P cj +P w +P x The hydrogen storage device supplies hydrogen to the hydrogen energy combined heat and power equipment to generate electricity, which in turn supplies power to the AC system and also provides energy for the cold and heat loads in the station.
[0029] 5. The electric hydrogen production device of the hydrogen energy system is connected to the AC bus of the AC system through AC / DC, and the hydrogen energy combined heat and power equipment of the hydrogen energy system is connected to the AC bus of the AC system through DC / AC. AC / DC and DC / AC are interlocked with each other.
[0030] 6. The AC system of the hydrogen refueling station is connected to the external power supply through an external line, and the hydrogen energy system communicates hydrogen energy with the outside through the external hydrogen energy supply. The hydrogen refueling station has two construction and operation modes for external energy supply according to the capacity of wind turbines and photovoltaic modules: First, when the power generation capacity is greater than the energy consumption of charging and hydrogenation at the station, the hydrogen refueling station is interconnected with the power grid and used as the power source of the power grid; hydrogen energy is transported to the outside through automobiles or pipelines, and the hydrogen refueling station is used as a hydrogen energy production unit; hydrogen refueling and charging services are provided to vehicles passing by through charging piles and hydrogen refueling machines. Second, when the power generation capacity is equivalent to the energy consumption of the station, it only serves as a hydrogen refueling station to provide hydrogen refueling and charging services to vehicles passing by.
[0031] 7. As the brain of the hydrogen refueling and charging station based on renewable energy, the control center coordinates the operation of the AC system, DC system, and hydrogen energy system according to the control strategy based on the energy supply of wind turbines and photovoltaic modules, the energy storage of energy storage batteries and hydrogen storage devices, the energy consumption of DC charging piles, AC charging piles, DC loads, AC loads, cold and hot loads, as well as the external power supply and hydrogen supply, according to the operation control process of the hydrogen refueling and charging station.
[0032] Using the technology of the utility model, a hydrogen refueling and charging station energy supply system based on renewable energy is constructed to provide hydrogen refueling and charging services for vehicles traveling back and forth, and can also provide electricity and hydrogen energy to the outside. The hydrogen refueling and charging station relies on renewable energy sources such as wind power generation, photovoltaic power generation, and hydrogen energy to achieve the organic combination, mutual conversion, and mutual supplementation of electricity and hydrogen energy, and is upgraded to a stable energy supplier. The hydrogen refueling and charging station energy supply system is zero-carbon and environmentally friendly, and has the ability to be self-sufficient, store, and supply energy to the outside. Due to the stability of the system and the flexibility of energy supply, it gets rid of the influence of external energy supply on the scientific and reasonable layout of hydrogen refueling and charging stations, and provides energy infrastructure guarantees for the use and development of hydrogen energy vehicles and rechargeable vehicles.
[0033] The above are all preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereto. Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A hydrogen refueling station energy supply system based on renewable energy, characterized in that: It includes an AC system, a DC system, a hydrogen energy system and a centralized control center for a hydrogen refueling and charging station; the AC system includes an AC bus, an external line, a wind turbine, a transformer, an energy storage battery I, a PCS I, an AC / DC, a DC / AC, a PCS II converter, an AC load and an AC charging pile, and the AC system adopts a single bus connection form; the DC system includes a DC bus, a photovoltaic module, a DC / DC I, an energy storage battery II, a DC / DC II, a DC load and a DC charging pile; the DC bus of the DC system is connected to the AC bus of the AC system through a PCS II converter, and the DC system adopts a single bus connection form; the hydrogen energy system includes an external hydrogen energy supply, an electric hydrogen production device, a hydrogen storage device, a hydrogen energy combined heat and power supply equipment, a hydrogenator, a pipeline and a heat and cold load, the electric hydrogen production device of the hydrogen energy system is connected to the AC bus of the AC system through AC / DC, and the hydrogen energy combined heat and power supply equipment of the hydrogen energy system is connected to the AC bus of the AC system through DC / AC.
2. A hydrogen refueling charging station energy supply system based on renewable energy according to claim 1, characterized in that: The hydrogen energy combined heat and power equipment includes a hydrogen fuel cell combined heat and power and a hydrogen generator combined heat and power.
3. The energy supply system for a hydrogen charging station based on renewable energy according to claim 1, characterized in that: The AC system is connected to an external power supply via an external line.
4. The energy supply system for a hydrogen refueling charging station based on renewable energy according to claim 1, characterized in that: The hydrogen energy system communicates hydrogen energy with the outside through external hydrogen energy supply.
5. The renewable energy-based hydrogen charging station energy supply system according to claim 1, characterized in that: The centralized control center of the hydrogen refueling and charging station coordinates the operation of the AC system, the DC system, and the hydrogen energy system. The DC system gives priority to meeting the energy supply of the DC load, the DC charging pile, and the energy storage battery II. When the DC system has excess power, the DC system supplies power to the AC system. The AC system gives priority to meeting the energy supply of the AC load, the AC charging pile, and the energy storage battery I, and supplies power to the DC system when the DC system is short of power.