Normal-conducting high-speed maglev traffic energy fusion system

Abstract

The invention relates to a normal-conducting high-speed maglev traffic energy fusion system which comprises a high-speed maglev traction power supply system, a renewable energy power generation system, a composite energy storage system, an energy management system, a cloud computing platform system and a maglev train. Compared with the prior art, efficient fusion of a renewable energy source system and a high-speed maglev traffic system is achieved, and the high-speed maglev traffic system has the advantages of being efficient and safe in high-speed maglev traffic, energy-saving and low-carbon in operation and the like.

Description

Technical Field

[0001] The present invention relates to the fields of transportation and new energy, and in particular to a conventional high-speed maglev transportation energy fusion system. Background Art

[0002] High-speed maglev has the advantages of high speed, low noise, environmental protection, low energy consumption and maintenance costs, etc. It can achieve smoother operation at a higher speed, and can fill the gap of 400-800km / h between high-speed railways and aviation. It is one of the important directions for the future development of rail transit.

[0003] High-speed maglev transportation is moving towards a speed of 600 kilometers per hour. Higher operating speed means higher traction energy consumption. High-speed maglev transportation is highly dependent on external power grids for energy consumption, with a relatively single power supply path and insufficient ability to resist external risks. In particular, the carbon emission problem of external power grid power supply, which is mainly based on thermal power generation, is prominent, making it difficult for high-speed maglev transportation to meet the needs of emission reduction and efficiency improvement.

[0004] As a long and long trunk line, high-speed maglev transportation has a lot of space resources along its infrastructure and along the route where renewable energy can be deployed. At present, maglev transportation lacks an energy system that can fully utilize and consume renewable energy locally and configure corresponding energy storage facilities. Summary of the invention

[0005] The purpose of the present invention is to provide a conventional high-speed maglev transportation energy fusion system in order to fully integrate and utilize renewable energy and existing external power grid electricity.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a conventional high-speed maglev transportation energy fusion system, which is characterized by comprising a high-speed maglev traction power supply system, a renewable energy power generation system, a composite energy storage system, an energy management system, a cloud computing platform system and a maglev train;

[0008] The high-speed maglev traction power supply system is used to convert electrical energy into the energy required by the maglev train, and feed back the excess electrical energy of the renewable energy power generation system or the braking energy of the maglev train to the external power grid;

[0009] The renewable energy power generation system is used to collect various forms of new energy and transmit it to the high-speed maglev traction power supply system or composite energy storage system or feed it back to the external power grid;

[0010] The composite energy storage system is used to discharge when the maglev train is pulling, charge when the maglev train feeds back electrical energy through regenerative braking, and store electrical energy generated by the renewable energy power generation system at the same time;

[0011] The energy management system is used to exchange real-time data with each system unit and coordinate the energy flow of each link;

[0012] The cloud computing platform system is used to adopt big data and cloud computing technology to make optimal decisions on power generation planning and scheduling planning, and to provide support for the optimal coordination control strategy of the energy management system.

[0013] Further, the high-speed maglev traction power supply system includes a rectifier, a DC bus, an inverter, a long-stator linear motor and a brake resistor;

[0014] The rectifier is a four-quadrant pulse rectifier with a bidirectional energy flow function, which converts the AC power of the public grid into DC power to supply energy to the DC bus, or inverts the DC bus power and feeds it back to the three-phase side of the public grid;

[0015] The DC bus power is supplied to the long-stator linear motor through the inverter to provide traction power for the maglev train. The braking energy of the maglev train is fed back to the DC bus through the inverter unit. The braking resistor is connected in series with a controllable circuit breaker and then connected to the DC bus. The controllable circuit breaker is in a normally open state. When the DC bus voltage exceeds the preset threshold, the circuit breaker is closed and the braking resistor is put into operation to absorb excess DC bus power.

[0016] Furthermore, the renewable energy power generation system is composed of distributed renewable energy power generation systems and centralized renewable energy power generation systems, either individually or together: the distributed renewable energy power generation system includes photovoltaic power generation equipment and wind power generation equipment carried by the infrastructure along the maglev transportation line, and is equipped with corresponding grid-connected converters directly connected to the DC bus; the centralized renewable energy power generation system includes centralized photovoltaic power plants and wind farms near the maglev traction station, which are connected to the DC bus through transmission lines through corresponding DC-DC and AC-DC grid-connected converters.

[0017] Furthermore, it also includes an operation control system and a medium voltage ring network system.

[0018] Furthermore, the energy management system is a multi-port energy flow monitoring, management and control system, which is connected to the cloud computing platform system, operation control system, rectifiers and inverters of the traction power supply system, grid-connected converters of the renewable energy power generation system, control systems of the composite energy storage system converter and energy management systems of adjacent traction substations for real-time data exchange.

[0019] Furthermore, the energy management system communicates with the cloud computing platform system and the operation control system in real time, generates an optimal scheduling strategy based on the train operation plan and the planning strategy issued by the cloud computing platform system, realizes the energy coordination of multiple system units under complex scenario conditions, and increases the proportion of new energy in the high-speed maglev transportation system while meeting the energy needs of the train. The composite energy storage system is responsible for the absorption and release of regenerative braking energy.

[0020] Furthermore, the renewable energy power generation system is connected to the medium-voltage ring network system through corresponding grid-connected equipment, and under the dispatch of the energy management system, it provides clean electricity for non-traction loads such as air conditioning, lighting, and communications in traction stations, along the tracks, and track power supply.

[0021] Furthermore, the composite energy storage system includes high-power supercapacitor energy storage, large-capacity battery energy storage and a DC-DC converter. The high-power supercapacitor energy storage and the large-capacity battery energy storage are connected to the DC bus through their respective DC-DC converters.

[0022] Furthermore, the cloud computing platform system analyzes data including train operation plans, meteorological conditions and various status data uploaded by various system units, predicts the power generation output of the new energy system and the energy consumption of the train, and comprehensively considers system operating costs, energy efficiency, carbon emissions and other indicators to make optimal decisions on the power generation planning and scheduling planning of the new energy power generation system.

[0023] Furthermore, the renewable energy power generation system adopts a multi-source fusion architecture.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The conventional high-speed maglev transportation energy fusion system of the present invention is equipped with a distributed renewable energy power generation system and a centralized renewable energy power generation system, making full use of abundant renewable energy such as solar energy and wind energy along the high-speed maglev transportation system, consuming clean energy on site as a function of the high-speed maglev system, effectively reducing the carbon emissions of the system and realizing the clean and green primary energy of maglev transportation.

[0026] 2. The DC bus in the existing conventional high-speed maglev traction power supply system is used as the grid-connected interface between the renewable energy power generation system and the composite energy storage system. The photovoltaic power generation system and the composite energy storage system directly use DC converters with a simple structure, and there is no need for large-scale structural transformation of the existing traction power supply system.

[0027] 3. The present invention is equipped with a regional energy management system, which can realize power flow control among multiple devices under different working conditions, maximize the utilization rate of renewable energy power generation and train regenerative braking energy, and realize coordinated power supply.

[0028] 4. The present invention can predict power demand and fluctuations based on measured data, train operation planning, and meteorological conditions, and formulate the optimal power generation plan and adjust the power coordination plan by considering operating costs and carbon emission indicators. At the same time, according to the load of the maglev train, the output of renewable energy power generation, and the energy storage configuration, the power generation plan and traffic organization and scheduling are optimized to achieve a deep integration of transportation and energy.

[0029] 5. The renewable energy power generation system adopts a multi-source fusion architecture and cooperates with a composite energy storage system to power the maglev train and low-voltage equipment at the station, so that the energy consumption of the high-speed maglev system is no longer highly dependent on the external power grid, increasing the reliability and resilience of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the architecture of a conventional high-speed maglev transportation energy fusion system provided by the present invention;

[0031] Figure 2 A schematic diagram of a collaborative control architecture of an energy management system provided by the present invention;

[0032] Figure 3 A schematic diagram of the power flow of the renewable energy power generation system provided by the present invention.

[0033] In the figure, 1. High-speed maglev traction power supply system, 101. DC bus, 102. Rectifier, 103. Inverter, 104. Long stator linear motor, 105. Braking resistor, 2. Renewable energy power generation system, 201. Distributed renewable energy power generation system, 2011. Photovoltaic power generation equipment, 2012. Wind power generation equipment, 2013. Grid-connected converter, 202. Centralized renewable energy power generation system, 2021. Photovoltaic power plant, 2022. Wind farm, 3. Composite energy storage system, 301. High-power supercapacitor energy storage, 302. Large-capacity battery energy storage, 303. DC-DC converter, 4. Energy management system, 5. Cloud computing platform system, 6. Maglev train, 7. Upper operation control system, 8. Medium voltage ring network system. DETAILED DESCRIPTION

[0034] 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 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 should fall within the scope of protection of the present invention.

[0035] like Figure 1As shown, the present invention proposes a conventional high-speed maglev transportation energy fusion system architecture, which is composed of a high-speed maglev traction power supply system 1, a renewable energy power generation system 2, a composite energy storage system 3, an energy management system 4, a cloud computing platform system 5, a maglev train 6, etc. The renewable energy power generation system 2 and the composite energy storage system 3 are connected to the DC bus 101 of the traction power supply system 1, and the energy management system 4 controls the converters in each system to realize real-time dynamic regulation of the flow of electric energy, thereby realizing the integration of high-speed maglev transportation and the energy system.

[0036] In the high-speed maglev traction power supply system 1, the rectifier 102 adopts a four-quadrant pulse rectifier with a bidirectional energy flow function. It can convert the AC power of the public power grid into DC power to supply energy to the DC bus 101, and can also invert the DC bus 101 power and feed it back to the three-phase side of the public power grid; the DC bus 101 power is supplied to the long stator linear motor 104 through the inverter 103 to provide traction operation power for the maglev train 6, and the braking energy of the maglev train 6 is fed back to the DC bus 101 side through the inverter 103; the braking resistor 105 is connected to the DC bus 101 after being connected in series with a controllable circuit breaker. When the voltage of the DC bus 101 exceeds the set threshold, the circuit breaker is closed, and the braking resistor 105 is put into operation to absorb the excess power of the DC bus 101 and ensure the safety of the system power supply.

[0037] The renewable energy power generation system 2 includes a variety of new energy units such as photovoltaic and wind power generation, and can be composed of a distributed renewable energy power generation system 201 and a centralized renewable energy power generation system 202 separately or together according to actual conditions: the distributed renewable energy power generation system 201 is composed of photovoltaic power generation equipment 2011 and wind power generation equipment 2012 carried by the infrastructure along the maglev transportation line, such as along the track of the maglev system, on the roof of the station, on the platform canopy, on the slope and other spaces, and is directly connected to the DC bus 101 through the corresponding grid-connected converter 2013; the centralized renewable energy power generation system 202 is composed of a centralized photovoltaic power plant 2021 and a wind farm 2022 near the maglev traction station, and is connected to the DC bus 101 through the corresponding DC-DC and AC-DC grid-connected converters via long-distance transmission lines.

[0038] As a preferred embodiment, the renewable energy power generation system 2 generates electric energy through the DC bus 101 to preferentially supply energy to the maglev train during the traction period, and during the idle period, the excess electric energy is fed back to the external power grid through the DC bus 101 and the rectifier unit 102, or the composite energy storage system 3 is supplemented according to demand.

[0039] The composite energy storage system 3 is composed of composite energy storage such as high-power supercapacitor energy storage 301, large-capacity battery energy storage 302, and a DC-DC converter 303. The high-power supercapacitor energy storage 301 and the large-capacity battery energy storage 302 are connected to the DC bus 101 through their respective DC-DC converters 303. The composite energy storage system 3 discharges when the maglev train 6 is towing, and charges when the maglev train 6 regenerative braking feeds back electrical energy, while storing the electrical energy generated by the renewable energy power generation system 2. The multi-form composite energy storage system 3 can simultaneously meet the requirements of rapid system response and large-capacity storage, and can expand new energy storage equipment such as flywheel energy storage according to the maturity of the technology.

[0040] like Figure 2 As shown, the energy management system 4 is a multi-port energy flow monitoring, management and control system, which is connected with the cloud computing platform system 5, the upper operation control system 7, the rectifier 102 and the inverter 103 of the traction power supply system 1, the grid-connected converter 2013 of the renewable energy power generation system 2, the control system of the converter of the composite energy storage system 3 and the energy management system of the adjacent traction substation, and exchanges data with each system unit in real time. The energy management system 5 generates the optimal scheduling strategy according to the train operation plan and the planning strategy issued by the cloud computing platform system 5, and coordinates the energy flow of each link by controlling the converter devices of each system, so as to realize the energy coordination of multiple system units and the "peak shaving and valley filling" of traction load under complex scene conditions, and improve the proportion of energy consumption of new energy in the high-speed maglev transportation system under the premise of meeting the energy demand of the train. The composite energy storage system 3 is responsible for the absorption and release of regenerative braking energy, so as to achieve a supply and demand balance of efficient, safe, energy-saving and low-carbon system. The cloud computing platform system 5 adopts big data and cloud computing technology, comprehensively analyzes the train operation plan, meteorological conditions, and various status data uploaded by each unit of the system, and predicts the power generation output of the new energy system and the energy consumption of the train. It comprehensively considers system operation costs, energy efficiency, carbon emissions and other indicators, makes optimal decisions on the power generation planning and scheduling planning of the new energy power generation system, and provides support for the energy management system 4 to optimize the coordinated control strategy.

[0041] The cloud computing platform system 5 adopts big data and cloud computing technology, comprehensively analyzes the train operation plan, meteorological conditions, and various status data uploaded by each unit of the system, and predicts the power generation output of the new energy system and the energy consumption of the train. It comprehensively considers system operation costs, energy efficiency, carbon emissions and other indicators, makes optimal decisions on the power generation planning and scheduling planning of the new energy power generation system, and provides support for the energy management system 4 to optimize the coordinated control strategy.

[0042] The electric energy generated by the renewable energy power generation system 2 flows as follows Figure 3As shown, the renewable energy power generation system 2 generates electric energy through the DC bus 101 to preferentially supply energy to the maglev train during the traction period, replenishes energy for the composite energy storage system 3 during the idle period, or feeds back excess electric energy to the external power grid 106 through the DC bus 101 and the rectifier 102. The renewable energy power generation system 2 can also add corresponding grid-connected equipment to access the medium-voltage ring network system 8, and under the dispatch of the energy management system 4, provide clean electric energy for non-traction loads such as air conditioning, lighting, and communications along the traction station and track, as well as track power supply.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A conventional high-speed maglev transportation energy fusion system, characterized in that: It includes a high-speed maglev traction power supply system (1), a renewable energy power generation system (2), a composite energy storage system (3), an energy management system (4), a cloud computing platform system (5) and a maglev train (6); The high-speed maglev traction power supply system (1) is used to convert electric energy into energy required by the maglev train (6), and feed back excess electric energy of the renewable energy power generation system (2) or braking energy of the maglev train (6) to an external power grid; The renewable energy power generation system (2) is used to collect various forms of new energy and transmit it to the high-speed maglev traction power supply system (1) or the composite energy storage system (3) or feed it back to the external power grid; The composite energy storage system (3) is used to discharge when the maglev train (6) is towing, to charge when the maglev train (6) feeds back electric energy through regenerative braking, and to store electric energy generated by the renewable energy power generation system (2); The energy management system (4) is used to perform real-time data exchange with each system unit and to coordinately manage the energy flow of each link; The cloud computing platform system (5) is used to use big data and cloud computing technology to make optimal decisions on power generation planning and dispatching planning, and to provide support for the energy management system (4) to implement optimal coordinated control strategies.

2. According to claim 1, a conventional high-speed maglev transportation energy fusion system is characterized in that: The high-speed magnetic levitation traction power supply system (1) comprises a DC bus (101), a rectifier (102), an inverter (103), a long-stator linear motor (104) and a braking resistor (105); The rectifier (102) is a four-quadrant pulse rectifier having a bidirectional energy flow function, and converts the alternating current of the public power grid into direct current to supply energy to the direct current bus (101), or inverts the electric energy of the direct current bus (101) and feeds it back to the three-phase side of the public power grid; The DC bus (101) electric energy is supplied to the long stator linear motor (104) through the inverter (103) to provide traction running electric energy for the maglev train (6), and the braking energy of the maglev train (6) is fed back to the DC bus (101) through the inverter unit (103); the braking resistor (105) is connected to the DC bus (101) after being connected in series with a controllable circuit breaker, and the controllable circuit breaker is in a normally open state. When the voltage of the DC bus (101) exceeds a preset threshold, the circuit breaker is closed, and the braking resistor (105) is put into operation to absorb excess electric energy of the DC bus (101).

3. According to claim 2, a conventional high-speed maglev transportation energy fusion system is characterized in that: The renewable energy power generation system (2) is composed of a distributed renewable energy power generation system (201) and a centralized renewable energy power generation system (202), either individually or together: the distributed renewable energy power generation system (201) includes photovoltaic power generation equipment (2011) and wind power generation equipment (2012) carried by infrastructure along the maglev transportation line, and is provided with corresponding grid-connected converters (2013) directly connected to the DC bus (101); the centralized renewable energy power generation system (202) includes a centralized photovoltaic power plant (2021) and a wind farm (2022) near the maglev traction station, and is connected to the DC bus (101) via a transmission line through corresponding DC-DC and AC-DC grid-connected converters.

4. According to claim 3, a conventional high-speed maglev transportation energy fusion system is characterized in that: It also includes an operation control system (7) and a medium-voltage ring network system (8).

5. According to claim 4, a conventional high-speed maglev transportation energy fusion system is characterized in that: The energy management system (4) is a multi-port energy flow monitoring, management and control system, which is connected with a cloud computing platform system (5), an operation control system (7), a rectifier (102) of a traction power supply system (1), an inverter (103), a grid-connected converter (2013) of a renewable energy power generation system (2), a control system of a converter of a composite energy storage system (3) and an energy management system of an adjacent traction substation to perform real-time data exchange.

6. The conventional high-speed maglev transportation energy fusion system according to claim 4 is characterized in that: The energy management system (4) communicates with the cloud computing platform system (5) and the operation control system (7) in real time, generates an optimal scheduling strategy based on the train operation plan and the planning strategy issued by the cloud computing platform system, realizes the energy coordination of multiple system units under complex scene conditions, and increases the proportion of energy consumption of new energy in the high-speed maglev transportation system while meeting the energy demand of the train. The composite energy storage system is responsible for the absorption and release of regenerative braking energy.

7. The conventional high-speed maglev transportation energy fusion system according to claim 4 is characterized in that: The renewable energy power generation system (2) is connected to the medium voltage ring network system (8) through corresponding grid-connected equipment, and under the dispatch of the energy management system (4), provides clean electric energy for non-traction loads such as air conditioning, lighting, and communications along the traction station and the track, as well as track power supply.

8. The conventional high-speed maglev transportation energy fusion system according to claim 1 is characterized in that: The composite energy storage system (3) comprises high-power supercapacitor energy storage (301), large-capacity battery energy storage (302) and a DC-DC converter (303); the high-power supercapacitor energy storage (301) and the large-capacity battery energy storage (302) are connected to the DC bus (101) via their respective DC-DC converters (303).

9. The conventional high-speed maglev transportation energy fusion system according to claim 1 is characterized in that: The cloud computing platform system (5) analyzes data including train operation planning, meteorological conditions and various status data uploaded by various system units, and makes predictions on the power generation output of the new energy system and the energy consumption of the train, comprehensively considering indicators such as system operation cost, energy efficiency, and carbon emissions, and making optimal decisions on the power generation planning and dispatching planning of the new energy power generation system.

10. The conventional high-speed maglev transportation energy fusion system according to claim 1 is characterized in that: The renewable energy power generation system (2) adopts a multi-source fusion architecture.

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