Medium-low speed maglev traffic energy fusion system architecture

Abstract

The invention relates to a medium-low speed maglev traffic energy fusion system architecture. The system architecture comprises a medium-low speed maglev traction power supply system, a renewable energy power generation system, a hybrid energy storage system, a maglev train, an energy integrated management scheduling system and a maglev traffic and carbon market collaborative architecture. Compared with the prior art, the method has the advantages that rich renewable energy sources along the medium-low speed maglev traffic system are effectively utilized, the power supply reliability of the medium-low speed maglev train system is improved, the energy use efficiency of the system is improved and the like, and fusion of the maglev traffic system and the energy system is realized.

Description

Technical Field

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

[0002] In short- and medium-distance travel, problems such as traffic congestion and environmental pollution are becoming increasingly prominent. In order to meet this challenge, maglev trains, as a new type of green transportation, have gradually become one of the focuses of rail transit development with their advantages of energy saving, low noise, high efficiency and safety. In particular, medium- and low-speed maglev transportation systems are suitable for short- and medium-distance transportation within cities or between urban agglomerations. The speed is generally between 100-200km / h, which can effectively fill the speed gap between traditional subway and light rail systems and is one of the important directions for the future development of rail transit.

[0003] In the future, when medium and low-speed maglev transportation is put into large-scale application among urban agglomerations, it will inevitably become a large energy consumer. Wider application means higher traction energy consumption. However, the current medium and low-speed maglev train system is highly dependent on external power grid power supply during operation, with a single power supply mode. In addition, due to the large proportion of thermal power generation in the traditional power supply energy structure, green energy accounts for a low proportion of the energy structure of the maglev transportation system. Summary of the invention

[0004] The purpose of the present invention is to provide a medium- and low-speed maglev transportation energy fusion system architecture in order to effectively utilize the abundant renewable energy along the medium- and low-speed maglev transportation system, improve the power supply reliability of the medium- and low-speed maglev train system, and enhance the energy utilization efficiency of the system.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A medium- and low-speed maglev transportation energy integration system architecture, the system architecture includes a medium- and low-speed maglev traction power supply system, a renewable energy power generation system, a hybrid energy storage system, a maglev train, an energy comprehensive management and dispatching system, and a maglev transportation and carbon market coordination architecture;

[0007] Among them, the medium and low speed maglev traction power supply system includes a main substation, which is connected to the high voltage grid and the medium voltage AC bus. The rectifier and bidirectional converter of the medium and low speed maglev traction power supply system are connected to the DC bus. The photovoltaic power generation of the renewable energy power generation system is connected to the DC bus through the DC-DC grid-connected converter. The wind power generation of the renewable energy power generation system is connected to the medium voltage AC bus through the AC-DC-AC grid-connected converter.

[0008] The high-power supercapacitor energy storage DC-DC grid-connected converter and the large-capacity battery energy storage DC-DC grid-connected converter of the hybrid energy storage system are connected to the DC bus.

[0009] Furthermore, the medium and low speed maglev traction power supply system also includes a step-down transformer, an inverter and a power and lighting system.

[0010] Furthermore, one end of the step-down transformer is connected to one end of the rectifier and the inverter, the other end of the step-down transformer is connected to the medium voltage AC bus, the other end of the inverter is connected to the bidirectional converter, the lighting system is connected to the step-down substation, and the step-down substation is connected to the medium voltage AC bus.

[0011] Furthermore, the medium and low speed maglev traction power supply system also includes a braking resistor, and the DC bus is connected to the braking resistor of the series controllable circuit breaker.

[0012] Furthermore, the high-power supercapacitor energy storage DC-DC grid-connected converter is connected to the high-power supercapacitor energy storage, and the large-capacity battery energy storage DC-DC grid-connected converter is connected to the large-capacity battery energy storage.

[0013] Furthermore, the contact rail and return rail of the maglev train are connected to the DC bus.

[0014] Furthermore, the renewable energy power generation system generates electric energy via the DC bus to supply energy to the maglev train during the traction period; during the idle period, the excess electric energy is fed back to the high-voltage power grid via the DC bus, AC-DC-AC grid-connected converter and medium-voltage AC bus, or used to charge the energy storage system.

[0015] Furthermore, the hybrid energy storage system discharges electricity when the maglev train is being pulled, charges the maglev train during idle periods, and stores excess electricity from the renewable energy generation system.

[0016] Furthermore, the energy integrated management and dispatching system connects and controls rectifier bidirectional converters, inverters, DC-DC grid-connected converters, AC-DC-AC grid-connected converters, high-power supercapacitor energy storage DC-DC grid-connected converters and large-capacity battery energy storage DC-DC grid-connected converters.

[0017] Furthermore, the maglev transportation and carbon market collaboratively construct an energy integrated management and dispatching system to conduct data exchange and carbon rights trading.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The medium-voltage AC bus and DC bus in the medium- and low-speed maglev traction power supply system can be used as the grid-connected interface between the renewable energy power generation system and the energy storage system. The wind power generation system adopts an AC-DC-AC grid-connected converter, and the photovoltaic power generation system and the energy storage system can directly adopt a DC-DC grid-connected converter. The structure is simple and there is no need for large-scale structural transformation of the existing traction power supply system. At the same time, it makes full use of the abundant renewable energy along the medium- and low-speed maglev transportation system, and consumes clean energy on site to supply power for the medium- and low-speed maglev system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 A schematic diagram of the collaborative control architecture of the energy comprehensive management and dispatching system provided by the present invention;

[0022] Figure 3 A schematic diagram of the collaborative architecture of the maglev transportation and carbon market provided by the present invention;

[0023] In the figure, medium and low speed maglev traction power supply system 1, renewable energy power generation system 2, hybrid energy storage system 3, maglev train 4, comprehensive energy management and dispatching system 5, maglev transportation and carbon market collaborative architecture 6, main substation 101, step-down transformer 102, rectifier 103 and bidirectional converter 104, inverter 105, step-down substation 106, lighting system 107, braking resistor 108, photovoltaic power generation 201, wind power generation 202, DC-DC grid-connected converter 203, AC-DC-AC grid-connected converter 204, high power supercapacitor energy storage 301, large capacity battery energy storage 302, high power supercapacitor energy storage DC-DC grid-connected converter 303, large capacity battery energy storage DC-DC grid-connected converter 304,. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0025] The present invention proposes a medium- and low-speed maglev transportation energy fusion system architecture, which aims to reduce energy consumption and carbon emissions by integrating renewable energy and intelligent management. The system is mainly composed of a traction power supply system, a renewable energy power generation system, a hybrid energy storage system, an energy comprehensive management and dispatching system, and a carbon market collaborative architecture. The traction power supply system provides DC power for the maglev train through the high-voltage power supply of the urban power grid for voltage reduction and rectification, and effectively manages the regenerative braking energy feedback of the train to ensure the safety and reliability of power supply. The renewable energy power generation system provides clean electricity for the maglev transportation system and coordinates with the energy storage system and the external power grid. The hybrid energy storage system combines high-power supercapacitors and large-capacity batteries to provide electricity during train traction and store excess renewable energy or regenerative braking electricity when idle, ensuring the system's rapid response and emergency power supply capabilities. The energy comprehensive management and dispatching system optimizes the energy flow between systems through real-time monitoring and data analysis to achieve a dynamic balance between power supply and demand. The carbon market collaborative architecture promotes energy conservation and emission reduction and improves the economic and environmental benefits of the system through data interaction between carbon emission rights trading and the energy comprehensive management system. With its intelligent and green features, the system architecture provides new ideas and references for the sustainable development of future maglev transportation, and helps realize a low-carbon, efficient and safe maglev transportation mode. Figure 1 This is a schematic diagram of the architecture of the conventional medium and low speed maglev transportation energy fusion system proposed in the present invention.

[0026] The system architecture of the present invention includes a medium- and low-speed maglev traction power supply system 1, a renewable energy power generation system 2, a hybrid energy storage system 3, a maglev train 4, an energy comprehensive management and dispatching system 5, and a maglev transportation and carbon market coordination architecture 6;

[0027] The medium and low speed maglev traction power supply system 1 includes a main substation 101, which is connected to the high voltage grid and the medium voltage AC bus. The rectifier 103 and the bidirectional converter 104 of the medium and low speed maglev traction power supply system 1 are connected to the DC bus. The photovoltaic power generation 201 of the renewable energy power generation system 2 is connected to the DC bus through the DC-DC grid-connected converter 203. The wind power generation 202 of the renewable energy power generation system 2 is connected to the medium voltage AC bus through the AC-DC-AC grid-connected converter 204.

[0028] The high-power supercapacitor energy storage DC-DC grid-connected converter 303 and the large-capacity battery energy storage DC-DC grid-connected converter 304 of the hybrid energy storage system 3 are connected to the DC bus.

[0029] The renewable energy power generation system 2 and the energy storage system 3 are connected to the traction power supply system 1 through the corresponding grid-connected converters; the energy comprehensive management and dispatching system 4 monitors the flow of electric energy in each system in real time, and realizes the online dynamic adjustment of electric energy by controlling the corresponding grid-connected converters of each system, so as to realize the integration of the medium and low-speed maglev transportation system and the energy system; 6 combines the transportation energy integration system of the medium and low-speed maglev with the carbon market, and links the relevant information of the carbon emissions of the maglev system in real time through the carbon emission rights trading platform and the energy comprehensive management and dispatching system, and participates in the demand response transaction of the maglev system in accordance with the maglev transportation emission baseline and the allocated emission quota set by the government, and guides the load adjustment in real time and on demand. At the same time, the third-party carbon emission supervision and verification agency monitors the carbon emissions of the maglev system in real time, and publishes the carbon emission report according to the corresponding period to feed back to the energy comprehensive management and dispatching system of the maglev transportation, which improves the implementation efficiency of energy management and dispatching, and promotes the economic and green operation of the maglev system. The renewable energy power generation system 2 is based on the distribution characteristics of renewable energy along the rail transit line, including a variety of new energy units such as photovoltaic and wind power generation. Through the complementary technology between multiple energy sources, its power generation capacity and power are planned to achieve the coordinated complementarity and local consumption of renewable energy and flexible power generation energy (thermal power generation, nuclear power generation, etc.), thereby building a multi-energy aggregated energy supply system.

[0030] In the medium and low speed maglev traction power supply system 1, according to the requirements of the line, a dedicated main substation 101 for urban rail transit is generally built along the line to perform the first voltage reduction processing on the AC110kV or 220kV high voltage electric energy transmitted from the urban power grid, and output AC35kV or 10kV AC power to the medium voltage AC bus. Subsequently, the traction step-down substation includes a step-down transformer 102 and a rectifier 103. The rectifier 103 often uses a 24-pulse rectifier for voltage reduction and rectification, and outputs a DC1500V direct current to the DC bus; the DC bus uses the side current collection method through the positive contact rail to provide traction operation power for the maglev train 4; the braking of the maglev train is mainly electric braking, which is fed back to the DC bus through the negative contact rail, i.e. the return rail, and the DC power generated by the train braking is converted into DC power by the inverter feedback type combined converter device bidirectional converter 104 and the feedback transformer 105. It is inverted into AC power with the same amplitude and phase as the grid voltage and fed back to the medium-voltage AC bus to supply power to the power and lighting systems of the electrical equipment along the station 107; the ground braking resistor 108 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 set threshold, the circuit breaker is closed, and the ground braking resistor 108 is put into operation to consume excess electric energy on the DC bus, stabilize the voltage, and prevent the regenerative braking from failing due to excessive line voltage. When the DC bus voltage returns to the set safety threshold, the controllable circuit breaker is automatically disconnected. The main substation 101 steps down the high voltage electric energy of the urban power grid to the medium voltage AC bus, and then steps down and rectifies it through the step-down transformer 102 and the rectifiers 103 and 104 to output a DC current of DC1500V to the DC bus; the DC bus provides traction running electric energy for the maglev train 4 through the positive contact rail, and feeds it back to the DC bus through the negative contact rail, i.e. the return rail, and inverts the DC electric energy generated during train braking into AC electric energy through the bidirectional converter 104 and the inverter 105 and feeds it back to the medium voltage AC bus to supply power to the power and lighting systems of the electrical equipment along the station 107; the braking resistor 108 is connected to the DC bus after being connected in series with a controllable circuit breaker. When the DC bus voltage exceeds the set threshold, the circuit breaker is closed, and the braking resistor 108 is put into operation to consume the excess electric energy of the DC bus and ensure the safety of the system power supply.

[0031] The bidirectional converter 104 has the function of bidirectional energy flow; during traction power supply, the rectifier 103 converts the public grid AC power into DC power to supply energy for the DC bus, and the inverter feedback combined conversion device bidirectional converter 104 and the feedback transformer 105 auxiliary rectification can also convert the medium voltage AC power into DC 1500V to supply energy for the DC bus.

[0032] The renewable energy power generation system 2 is based on the distribution characteristics of renewable energy along the rail transit line, and coordinates and plans the multiple energy resources in each area according to local conditions. The access to the renewable energy power generation system is mainly photovoltaic power generation 201 and wind power generation 202. At the same time, through the complementary technology between multiple energy sources, its power generation capacity and power are planned to achieve the coordinated complementarity and local consumption of renewable energy and flexible power generation energy (thermal power generation, nuclear power generation, etc.), so as to build a multi-energy aggregation energy supply system. According to the actual situation of the operation of medium and low-speed maglev transportation, the renewable energy power generation system 2 in maglev transportation can be composed of distributed renewable energy power generation systems and centralized renewable energy power generation systems alone or together; the distributed renewable energy power generation system is composed of photovoltaic power generation 201 and wind power generation 202 carried by the infrastructure along the maglev transportation line, such as the track line of the maglev system, the roof of the station, the platform canopy, the slope and other spaces, among which the photovoltaic power generation 201 is connected to the DC bus through the DC-DC grid-connected converter 203, and the wind power generation 202 is connected to the grid through the AC-DC-AC The converter 204 is connected to the medium voltage AC bus, and can also be directly connected to the DC bus through an AC-DC converter; the centralized renewable energy power generation system is composed of centralized photovoltaic power plants, wind power plants, etc. near the maglev traction station, and is connected to the DC bus or the medium voltage AC bus through the corresponding grid-connected converter via long-distance transmission lines; the renewable energy power generation system 2 generates electricity and supplies energy to the maglev train 4 during the traction period through the DC bus first, and feeds back the excess electricity to the external power grid through the DC bus and the inverter feedback combined converter device during the idle period, or charges the energy storage system 3 according to demand.

[0033] The hybrid energy storage system 3 is composed of energy storage equipment such as high-power supercapacitor energy storage 301, large-capacity battery energy storage 302, and corresponding DC-DC grid-connected converters 303 and 304; the high-power supercapacitor energy storage 301 and the large-capacity battery energy storage 302 are connected to the DC bus through their own DC-DC grid-connected converters 303 and 304 respectively; the energy storage system 3 discharges when the maglev train 4 is in traction, and provides part of the electric energy for the train, that is, the train energy during the traction period can come from both the external power system and its own hybrid energy storage system; it charges during the idle period, that is, when the maglev train 4 regenerative braking feeds back electric energy, and at the same time stores the excess electric energy generated by the renewable energy generation system 2; when the traction network is out of operation for some reason , mainly using the energy storage system 3 to implement emergency power supply for the maglev train 4; the hybrid energy storage system 3 can not only meet the system's requirements for rapid response and large-capacity storage through a multi-level energy storage mechanism, but also increase the controllability and flexibility of the system's current; it can also participate in the traction network voltage stability control, and be used for peak shaving and valley filling of traction loads over a long period of time, promote the local consumption of regenerative braking energy and new energy resources, effectively reduce electricity costs, and improve the economy of system operation; most importantly, when the external power grid or traction network is disturbed or fails, the hybrid energy storage system can provide short-term emergency power supply capabilities for important loads such as the maglev train 4 and the power and lighting systems 107 along the station, thereby improving the safety and reliability of system operation. The energy comprehensive management and dispatching system 5 is a diversified and complex system integrating sensor and communication networks, big data and cloud computing platforms, and dispatching command centers. It collects real-time information about the physical system through the sensor network and sends it to the big data and cloud computing platform via the communication network. The big data and cloud computing platform uses advanced cloud computing technology to analyze and process real-time information. The dispatching command center calls the calculation results, makes dispatching decisions, and finally transmits them back to each system unit via the communication network to achieve control and management of energy flow. The energy comprehensive management and dispatching system 5 and the rectifier 103, inverter feedback combined converter 104 and 105, and renewable energy generation of the traction power supply system 1 The control systems of the DC-DC, AC-DC-AC grid-connected converters 203 and 204 of system 2, the DC-DC grid-connected converters 303 and 304 of the energy storage system 3, the integrated energy management and dispatching system of the adjacent traction substation, and the carbon emission rights trading platform are connected to each other. By interacting with each system unit in real time, the digitalization, informatization, and visualization level of the system are improved. Through multi-level power prediction, regenerative energy absorption, and peak shaving and valley filling, the energy flow of each link of the system converter is controlled to achieve a balance between the supply and demand of electricity and efficient flow of information between the units, thereby ensuring efficient management of energy under different working conditions and guaranteeing the flexibility and low carbon nature of system construction.The hybrid energy storage system 3 can not only meet the requirements of rapid system response and large-capacity storage through a multi-level energy storage mechanism, but also participate in the voltage stability control of the traction network, and is used for peak shaving and valley filling of traction loads over a long period of time, promoting the local consumption of regenerative braking energy and new energy resources, and providing short-term emergency power supply capabilities for important loads such as the maglev train 4 and the power and lighting systems 107 along the station in an emergency; in the future, new energy storage equipment such as flywheel energy storage can be expanded according to the maturity of the technology.

[0034] The energy comprehensive management and dispatching system 4 is composed of a sensor and communication network, a big data and cloud computing platform, a dispatching command center, etc. It collects real-time information on the physical system through the sensor network and sends it to the big data and cloud computing platform via the communication network. The big data and cloud computing platform uses advanced cloud computing technology to analyze and process real-time information. The dispatching command center calls the calculation results, makes dispatching decisions, and finally transmits them back to each system unit via the communication network, so as to achieve a balance between electricity supply and demand and efficient flow of information between units, ensure efficient control and management of energy under different working conditions, and ensure the flexibility and low carbon nature of system construction.

[0035] The sensing and communication network adopts advanced sensing and communication technologies, and senses each unit in the medium and low speed maglev transportation energy fusion system through a large number of sensing devices, and sends real-time on-site information to the big data and cloud computing platform; the massive data and diversified information collected by sensing technology require high-speed, stable, safe, reliable and highly compatible new communication technologies for transmission; the communication network adopts multiple communication methods such as optical fiber private network, wireless private network, power line communication, etc., which can be applied to different communication demand occasions, and through the setting of firewalls and VPN gateways, encrypted transmission of important data and other measures, the communication security of each link is guaranteed. At the same time, by analyzing and improving the standards of each level of the communication system, including the protocol standards of the physical layer, data link layer, transport layer and application layer, the convenience and compatibility of the communication system are improved, ensuring that information can be quickly and accurately transmitted to the big data and cloud computing platform.

[0036] The big data and cloud computing platform integrates computing resources for train operation planning, meteorological conditions, geographical conditions and real-time status data of each system unit uploaded by the sensor and communication network, providing powerful computing and storage capacity support for various analytical computing tasks. The platform comprehensively considers factors such as system operating costs, energy utilization efficiency and carbon emissions, and uses multi-time scale power prediction technology to perform power generation and load prediction, and calculates and analyzes the power generation output, energy storage energy distribution and dispatching operation of future new energy systems, providing support for the dispatching command center to make the most optimized coordinated control strategy, thereby maximizing the benefits of various links such as energy production, consumption and operation, and ensuring efficient and low-carbon operation of the system.

[0037] The dispatching and command center can communicate with the big data and cloud computing platform in real time, generate the most optimized dispatching strategy based on the train operation plan, the planning strategy issued by the big data and cloud computing platform, and the carbon emission report, and transmit it back to each system unit through the communication network, so as to achieve energy coordination between multiple system units under complex scene conditions. At the same time, the dispatching and command center will increase the proportion of energy consumption of new energy in the medium and low-speed maglev transportation system on the basis of ensuring the safe and reliable operation of the train, and the hybrid energy storage system will be responsible for the absorption and release of regenerative braking energy, so as to reduce carbon emissions as much as possible, achieve a green, safe and efficient supply and demand balance of the system, and finally establish a safer, more efficient, environmentally friendly and sustainable energy utilization model.

[0038] The renewable energy power generation system 2 can add matching grid-connected equipment to access the medium-voltage AC bus. In the entire transportation energy system, the comprehensive energy management and dispatching system 5 can reasonably allocate electric energy according to different load demands, energy supply conditions and carbon emission requirements, and play a key dispatching role. Under the dispatch of the comprehensive energy management and dispatching system 5, the renewable energy power generation system 2 can provide clean electric energy for many non-traction loads 107 such as air conditioning, lighting, and communication systems along the traction station and track, which helps to improve the utilization rate of renewable energy and realize the reasonable allocation and utilization of energy.

[0039] The coordinated framework of maglev transportation and carbon market6 includes the government, carbon emission trading market, third-party carbon emission supervision and verification agency and medium and low speed maglev transportation energy integration system, aiming to achieve energy saving, low carbon and efficient and safe operation goals. The synergistic framework 6 of maglev transportation and carbon market is that the government sets the emission baseline of the maglev system and allocates emission quotas to the carbon emission rights trading market; the carbon emission rights trading market exchanges data and trades carbon rights with the energy comprehensive management and dispatching system 5 of the maglev system, and the carbon emission rights trading market monitors the actual carbon emissions of the maglev system through the energy comprehensive management and dispatching system 5; the energy comprehensive management and dispatching system 5 obtains production carbon emission rights from the carbon emission rights trading market, controls each system unit in the maglev system to carry out energy-saving and carbon reduction production, participates in carbon trading, and participates in demand response trading according to the established electricity consumption plan, and guides load adjustment in real time and on demand; the government publishes the carbon emission report of the maglev system to the third-party carbon emission supervision and verification agency, and the third-party carbon emission supervision and verification agency monitors the carbon emissions of the maglev system in real time and publishes the actual carbon emission report of the maglev system to the government according to the corresponding period; the synergistic framework 6 of maglev transportation and carbon market deepens the connection between the electricity and carbon markets, improves the implementation efficiency of energy management and dispatching, and promotes the energy-saving, low-carbon, green and efficient operation of the maglev system. Driven by the "dual carbon" policy, the synergy of the electricity and carbon markets will become a significant trend.

[0040] The beneficial effects of the present invention are:

[0041] 1. Make full use of the abundant renewable energy along the medium and low-speed maglev transportation system, and consume clean energy locally as the function of the medium and low-speed maglev system, which effectively reduces the carbon emissions of the system and realizes the clean and green primary energy of maglev transportation.

[0042] 2. The medium-voltage AC bus and DC bus in the existing medium- and low-speed maglev traction power supply system can be used as the grid-connected interface between the renewable energy power generation system and the energy storage system. The wind power generation system adopts AC-DC-AC grid-connected converter, and the photovoltaic power generation system and the energy storage system can directly adopt DC-DC grid-connected converter. The structure is simple and there is no need for large-scale structural transformation of the existing traction power supply system.

[0043] 3. The present invention is equipped with an energy comprehensive management and dispatching system, which can realize the 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.

[0044] 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.

[0045] 5. The renewable energy power generation system adopts a multi-source fusion architecture and cooperates with a hybrid energy storage system to power maglev trains and low-voltage equipment at stations, so that the energy consumption of medium and low-speed maglev systems is no longer highly dependent on the external power grid, increasing the reliability and resilience of the power supply system.

[0046] 6. The present invention fully considers the carbon emissions of the medium and low speed maglev transportation energy fusion system. By constructing a coordinated framework of maglev transportation and carbon market, it deepens the connection between the electricity and carbon markets, improves the implementation efficiency of energy management and scheduling, and promotes the energy-saving, low-carbon, green and efficient operation of the maglev system.

[0047] Figure 2 A schematic diagram of the collaborative control architecture of the energy comprehensive management and dispatching system provided by the present invention;

[0048] Figure 3 Schematic diagram of the collaborative architecture of maglev transportation and carbon market provided by the present invention.

[0049] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A medium and low speed maglev transportation energy fusion system architecture, characterized in that: The system architecture includes a medium- and low-speed maglev traction power supply system (1), a renewable energy power generation system (2), a hybrid energy storage system (3), a maglev train (4), an integrated energy management and dispatching system (5), and a maglev transportation and carbon market coordination architecture (6); The medium- and low-speed maglev traction power supply system (1) comprises a main substation (101), the main substation (101) is connected to a high-voltage power grid and a medium-voltage AC bus, a rectifier (103) and a bidirectional converter (104) of the medium- and low-speed maglev traction power supply system (1) are connected to a DC bus, a photovoltaic power generation (201) of a renewable energy power generation system (2) is connected to the DC bus via a DC-DC grid-connected converter (203), and a wind power generation (202) of the renewable energy power generation system (2) is connected to the medium-voltage AC bus via an AC-DC-AC grid-connected converter (204); The high-power supercapacitor energy storage DC-DC grid-connected converter (303) and the large-capacity battery energy storage DC-DC grid-connected converter (304) of the hybrid energy storage system (3) are connected to the DC bus.

2. According to the low-speed maglev transportation energy fusion system architecture of claim 1, it is characterized by: The medium and low speed maglev traction power supply system (1) further comprises a step-down transformer (102), an inverter (105) and a power and lighting system (107).

3. According to claim 2, a medium and low speed maglev transportation energy fusion system architecture is characterized in that: One end of the step-down transformer (102) is connected to one end of the rectifier (103) and the inverter (105), the other end of the step-down transformer (102) is connected to the medium-voltage AC bus, the other end of the inverter (105) is connected to the bidirectional converter (104), the lighting system (107) is connected to the step-down substation (106), and the step-down substation (106) is connected to the medium-voltage AC bus.

4. According to claim 2, a medium and low speed maglev transportation energy fusion system architecture is characterized in that: The medium and low speed maglev traction power supply system (1) also includes a braking resistor (108), and the DC bus is connected to the braking resistor (108) of the series controllable circuit breaker.

5. According to the low-speed maglev transportation energy fusion system architecture of claim 1, it is characterized by: The high-power supercapacitor energy storage DC-DC grid-connected converter (303) is connected to the high-power supercapacitor energy storage (301), and the large-capacity battery energy storage DC-DC grid-connected converter (304) is connected to the large-capacity battery energy storage (302).

6. According to claim 5, a medium and low speed maglev transportation energy fusion system architecture is characterized in that: The contact rail and return rail of the maglev train (4) are connected to the DC bus.

7. The low-speed and medium-speed maglev transportation energy fusion system architecture according to claim 6 is characterized in that: The renewable energy power generation system (2) generates electric energy via a DC bus to supply energy to a maglev train (4) during a traction period; during an idle period, excess electric energy is fed back to a high-voltage power grid via a DC bus, an AC-DC-AC grid-connected converter (204) and a medium-voltage AC bus, or used to charge an energy storage system (3).

8. The low-speed and medium-speed maglev transportation energy fusion system architecture according to claim 7 is characterized in that: The hybrid energy storage system (3) discharges when the maglev train (4) is being pulled, charges the maglev train (4) during idle periods, and stores excess electric energy from the renewable energy generation system (2).

9. The low-speed maglev transportation energy fusion system architecture according to claim 1 is characterized in that: The energy integrated management and dispatching system (5) is connected to and controls the rectifier (103), the bidirectional converter (104), the inverter (105), the DC-DC grid-connected converter (203), the AC-DC-AC grid-connected converter (204), the high-power supercapacitor energy storage DC-DC grid-connected converter (303) and the large-capacity battery energy storage DC-DC grid-connected converter (304).

10. The low-speed and medium-speed maglev transportation energy fusion system architecture according to claim 9 is characterized in that: Maglev transportation and carbon market collaborative architecture (6) Energy integrated management and dispatching system (5) for data exchange and carbon rights trading.

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