A conventional high-speed maglev transportation energy integration system

Abstract

This invention relates to a conventional high-speed maglev transportation energy integration system, 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. Compared with existing technologies, this invention achieves efficient integration of a renewable energy system and a high-speed maglev transportation system, offering advantages such as high efficiency and safety, energy saving, and low-carbon operation of high-speed maglev transportation.

Description

Technical Field

[0001] This invention relates to the fields of transportation and new energy, and in particular to a conventional high-speed maglev transportation energy integration system. Background Technology

[0002] High-speed maglev has advantages such as high speed, low noise, environmental friendliness, low energy consumption and low maintenance costs. It can achieve smooth operation at higher speeds and fill the gap of 400-800 km / h between high-speed rail 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, and higher operating speeds mean higher traction energy consumption. High-speed maglev transportation is highly dependent on the external power grid, with a relatively single power supply path and insufficient ability to withstand external risks. In particular, the carbon emission problem of the external power grid, which is mainly based on thermal power generation, is prominent, making it difficult for high-speed maglev transportation to meet the requirements of emission reduction and efficiency improvement.

[0004] As a long-distance trunk line, high-speed maglev transportation has abundant space resources along its infrastructure and route suitable for the deployment of renewable energy. Currently, maglev transportation lacks an energy system capable of fully utilizing and absorbing renewable energy locally, and configuring corresponding energy storage facilities. Summary of the Invention

[0005] The purpose of this invention is to provide a conventional high-speed maglev transportation energy fusion system that fully integrates and utilizes renewable energy and existing external power grid electricity.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] This invention provides a conventional high-speed maglev transportation energy integration system, characterized in that it includes 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 to feed back the excess electrical energy from the renewable energy power generation system or the braking energy of the maglev train to the external power grid.

[0009] Renewable energy generation systems are used to collect various forms of new energy sources and transmit them to high-speed maglev traction power supply systems or composite energy storage systems or feed them back to the external power grid.

[0010] The composite energy storage system is used to discharge during the traction of the maglev train, charge during the regenerative braking of the maglev train, and store the electrical energy generated by the renewable energy power generation system.

[0011] The energy management system is used to interact with various system units in real time and to coordinate the energy flow in each stage.

[0012] The cloud computing platform system is used to make optimal decisions on power generation planning and dispatch planning by adopting big data and cloud computing technologies, and to provide support for the optimal coordination and control strategies of the energy management system.

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

[0014] The rectifier is a four-quadrant pulse rectifier with bidirectional energy flow function, which converts AC power from the public power grid into DC power to supply power to the DC bus, or inverts DC bus power back to the three-phase side of the public power 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 to the DC bus in series with the controllable circuit breaker. The controllable circuit breaker is in the normally open state. When the DC bus voltage exceeds the preset threshold, the circuit breaker closes and the braking resistor is put into operation to absorb the excess power of the DC bus.

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

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

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

[0019] Furthermore, the energy management system communicates in real time with the cloud computing platform system and the operation control system. Based on the train operation plan and the planning strategy issued by the cloud computing platform system, it generates the optimal scheduling strategy to achieve energy coordination of multiple system units under complex operating conditions. While meeting the energy needs of the train, it increases the proportion of new energy in the high-speed maglev transportation system. 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. Under the dispatch of the energy management system, it provides clean electricity for non-traction loads such as air conditioning, lighting, and communication along the traction depot and track, as well as track power supply.

[0021] Furthermore, the composite energy storage system includes high-power supercapacitor energy storage, large-capacity battery energy storage, and DC-DC converters. 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 each unit of the system to predict the power output of the new energy system and the energy consumption of the train. Taking into account indicators such as system operating costs, energy efficiency, and carbon emissions, it makes 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 integration system of the present invention is equipped with a distributed renewable energy power generation system and a centralized renewable energy power generation system. It makes full use of the abundant renewable energy sources such as solar and wind energy along the high-speed maglev transportation system, and consumes clean energy locally to power 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 existing DC bus in the conventional high-speed maglev traction power supply system is used as the grid connection interface for the renewable energy power generation system and the composite energy storage system. The photovoltaic power generation system and the composite energy storage system directly adopt DC-DC converters, which are simple in structure and do not require large-scale structural modifications to 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 operating conditions, maximize the utilization rate of renewable energy power generation and train regenerative braking energy, and achieve coordinated power supply.

[0028] 4. This invention can predict power demand and fluctuations based on measured data, train operation plans, and meteorological conditions, taking into account operating costs and carbon emission indicators, to formulate optimal power generation plans and adjust power coordination schemes. Simultaneously, based on the load conditions of maglev trains, renewable energy power generation output, and energy storage configuration, it optimizes power generation plans and train operation scheduling, achieving deep integration of transportation and energy.

[0029] 5. The renewable energy power generation system adopts a multi-source integrated architecture, which, together with the composite energy storage system, supplies power to the maglev train and the low-voltage equipment at the station. This makes the energy consumption of the high-speed maglev system no longer highly dependent on the external power grid, and increases the reliability and resilience of the power supply system. Attached Figure Description

[0030] Figure 1 This invention provides a schematic diagram of a conventional high-speed maglev transportation energy integration system architecture.

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

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

[0033] In the diagram, 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-level operation control system; 8. Medium-voltage ring network system. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] like Figure 1As shown, this invention proposes a conventional high-speed maglev transportation energy integration system architecture, which consists 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, and a maglev train 6. 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. The energy management system 4 controls the converter devices in each system to realize the real-time dynamic adjustment of the flow of electrical energy, thereby realizing the integration of high-speed maglev transportation and energy systems.

[0036] In the high-speed maglev traction power supply system 1, the rectifier 102 adopts a four-quadrant pulse rectifier, which has the function of bidirectional energy flow. It can convert the AC power of the public grid into DC power to power the DC bus 101, and can also invert the power of the DC bus 101 to feed back to the three-phase side of the public grid. The power of the DC bus 101 is supplied to the long stator linear motor 104 through the inverter 103 to provide traction power for the maglev train 6. The braking energy of the maglev train 6 is fed back to the DC bus 101 through the inverter 103. The braking resistor 105 is connected to the DC bus 101 after a controllable circuit breaker in series. When the voltage of the DC bus 101 exceeds the set threshold, the circuit breaker closes 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 various new energy units such as photovoltaic and wind power generation. It can be composed of distributed renewable energy power generation system 201 and centralized renewable energy power generation system 202, either individually or together, depending on the actual situation. Distributed renewable energy power generation system 201 consists of photovoltaic power generation equipment 2011 and wind power generation equipment 2012 carried by infrastructure along the maglev transportation line, such as along the track of the maglev system, on station roofs, platform canopies, slopes, etc., and is directly connected to the DC bus 101 through corresponding grid-connected converters 2013. Centralized renewable energy power generation system 202 consists of centralized photovoltaic power generation fields 2021 and wind farms 2022 near the maglev traction station, and is connected to the DC bus 101 through corresponding DC-DC and AC-DC grid-connected converters via long-distance transmission lines.

[0038] In a preferred embodiment, the renewable energy power generation system 2 generates electricity and supplies power to the maglev train during traction periods via DC bus 101. During idle periods, excess electricity is fed back to the external power grid via DC bus 101 and rectifier unit 102, or used to replenish the composite energy storage system 3 as needed.

[0039] The composite energy storage system 3 consists of a high-power supercapacitor energy storage 301, a 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 traction-driven and charges when the maglev train 6 regenerates and regenerates electrical energy. At the same time, it stores 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. It can be expanded to include 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. It connects to the cloud computing platform system 5, the upper-level operation control system 7, the rectifier 102 and 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 interacts with each system unit in real time. The energy management system 5 generates an optimal scheduling strategy based on the train operation plan and the planning strategy issued by the cloud computing platform system 5. By controlling the converter devices of each system, it coordinates the energy flow of each link, realizes the energy coordination of multiple system units under complex operating conditions, and achieves peak shaving and valley filling of traction load. Under the premise of meeting the energy demand of the train, it increases the proportion of new energy in the energy consumption of the high-speed maglev transportation system. The composite energy storage system 3 is responsible for the absorption and release of regenerative braking energy, achieving a supply and demand balance that is efficient, safe, energy-saving, and low-carbon. The cloud computing platform system 5 uses big data and cloud computing technologies to comprehensively analyze the power generation output of the new energy system and the energy consumption of the train based on the train's operation plan, meteorological conditions, and various status data uploaded by each unit of the system. It comprehensively considers indicators such as system operating costs, energy efficiency, and carbon emissions to make optimal decisions on the power generation planning and scheduling planning of the new energy power generation system, and provides support for the optimal coordination and control strategy of the energy management system 4.

[0041] The cloud computing platform system 5 uses big data and cloud computing technologies to comprehensively analyze the power generation output of the new energy system and the energy consumption of the train based on the train's operation plan, meteorological conditions, and various status data uploaded by each unit of the system. It comprehensively considers indicators such as system operating costs, energy efficiency, and carbon emissions to make optimal decisions on the power generation planning and scheduling planning of the new energy power generation system, and provides support for the optimal coordination and control strategy of the energy management system 4.

[0042] The direction of electrical energy flow generated by renewable energy power generation system 2 is as follows Figure 3As shown, the renewable energy generation system 2 generates electricity that is prioritized for powering the maglev train during traction periods via DC bus 101. During idle periods, it replenishes the composite energy storage system 3, or feeds excess electricity back to the external power grid 106 via DC bus 101 and rectifier 102. The renewable energy generation system 2 can also be equipped with corresponding grid-connected devices to connect to the medium-voltage ring network system 8. Under the dispatch of the energy management system 4, it provides clean electricity for traction depots, non-traction loads such as air conditioning, lighting, and communications along the track, as well as track power supply.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A constant-conduction high-speed maglev transportation energy fusion system, characterized in that, The system comprises 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 for converting electric energy into the required energy of the maglev train (6) and feeding back the excess electric energy of the renewable energy power generation system (2) or the braking energy of the maglev train (6) to an external power grid. The renewable energy power generation system (2) is used for collecting various forms of new energy and transmitting the energy to the high-speed maglev traction power supply system (1) or the composite energy storage system (3) or feeding back the energy to the external power grid. The composite energy storage system (3) is used for discharging when the maglev train (6) is in traction, charging when the maglev train (6) is in regenerative braking and feeding back electric energy, and storing the electric energy generated by the renewable energy power generation system (2). The energy management system (4) is used for real-time data interaction with each system unit and collaborative management of energy flow of each link. The cloud computing platform system (5) is used for optimal decision of power generation planning and dispatching planning by using big data and cloud computing technology and providing support for optimal coordinated control strategy of the energy management system (4). The high-speed maglev 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 with bidirectional energy flow function, which converts AC power of a public power grid into DC power to supply energy for the DC bus (101) or inversely converts the DC bus (101) electric energy to feed back to the public power grid three-phase side. 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 (103); the braking resistor (105) is connected to the DC bus (101) in series with a controllable circuit breaker, the controllable circuit breaker is in a normal open state, the circuit breaker is closed when the DC bus (101) voltage exceeds a preset threshold, the braking resistor (105) is put into operation to absorb excess electric energy of the DC bus (101). 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) alone or together: the distributed renewable energy power generation system (201) comprises photovoltaic power generation equipment (2011) and wind power generation equipment (2012) carried by maglev transportation infrastructure and is provided with a corresponding grid-connected converter (2013) directly connected to the DC bus (101); the centralized renewable energy power generation system (202) comprises a centralized photovoltaic power generation field (2021) and a wind power field (2022) near a maglev traction station, which are connected to the DC bus (101) through corresponding DC-DC and AC-DC grid-connected converters through power transmission lines.

2. The constant-conductor high-speed maglev transportation energy fusion system according to claim 1, characterized in that, The system further comprises an operation control system (7) and a medium-voltage ring network system (8).

3. The constant-conductor high-speed maglev transportation energy fusion system according to claim 2, characterized in that, 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 operation control system (7), the rectifier (102) and the inverter (103) of the high-speed maglev traction power supply system (1), the grid-connected converter (2013) of the renewable energy power generation system (2), the control system of the composite energy storage system (3) converter and the energy management system of the adjacent traction substation, and performs real-time data interaction.

4. The constant-conductor high-speed maglev transportation energy fusion system according to claim 2, 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 according to the train operation planning and the planning strategy issued by the cloud computing platform system, realizes energy coordination of multiple system units under complex scene conditions, and improves the energy utilization ratio of new energy in the high-speed maglev transportation system under the premise of meeting the train energy demand, and the composite energy storage system is responsible for absorbing and releasing the regenerative braking energy.

5. The constant-conductor high-speed maglev transportation energy fusion system according to claim 2, 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 provides clean electric energy for traction stations, air conditioners, lighting, communication non-traction loads along the track and track power supply under the scheduling of the energy management system (4).

6. The constant-conductor high-speed maglev transportation energy fusion system according to claim 1, characterized in that, The composite energy storage system (3) includes high-power super capacitor energy storage (301), large-capacity battery energy storage (302) and direct-direct converter (303), and the high-power super capacitor energy storage (301) and the large-capacity battery energy storage (302) are connected to the DC bus (101) through respective direct-direct converters (303).

7. The constant-conduction high-speed maglev transportation energy fusion system according to claim 1, characterized in that, The cloud computing platform system (5) analyzes data including train operation planning, weather conditions and various state data uploaded by each unit of the system, performs new energy system power generation output prediction and train energy consumption prediction, and comprehensively considers system operation cost, energy efficiency and carbon emission indicators to make optimal decisions on new energy power generation system generation planning and scheduling planning.

8. The constant-conduction high-speed maglev transportation energy fusion system of claim 1, wherein, The renewable energy power generation system (2) adopts a multi-source fusion architecture.

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