Coordinated control system and energy control method of multi-source coordinated traction power supply system

Abstract

The invention relates to the technical field of electrified railway traction power supply, in particular to a coordination control system and an energy control method for a multi-source coordination traction power supply system, and the system at least comprises a load collection module which is configured to be used for collecting the traction load of a motor train unit in the traction power supply system and sending the traction load to a coordination control module; the light storage module is configured to be used for collecting the photovoltaic operation state of the photovoltaic converter, the energy storage operation state of the energy storage converter, the photovoltaic power generation condition of the photovoltaic unit and the energy storage charge state of the energy storage unit, and sending the photovoltaic operation state, the energy storage operation state, the photovoltaic power generation condition and the energy storage charge state to the coordination control module; the coordination control module is configured to be used for determining a target control strategy based on the traction load, the photovoltaic power generation condition and the energy storage charge state; and adjusting the photovoltaic operation state and the energy storage operation state by using the target control strategy so as to realize real-time energy control between the optical storage module and the traction power supply system.

Description

Technical Field

[0001] The present disclosure relates to the technical field of traction power supply for electrified railways, and particularly to a coordinated control system and an energy control method for a multi-source collaborative traction power supply system. Background Art

[0002] In recent years, people have paid increasing attention to environmental protection, and new energy and green energy have been fully developed. As a representative of new energy, photovoltaic has been widely used in actual scenarios.

[0003] In related technologies, both the coordinated control system and the power control of the coordinated control system assume that new energy is directly connected to an infinite power grid. This method only considers the situation on the power supply side and it is difficult to meet the real-time requirements of the traction power supply system. Summary of the Invention

[0004] The present disclosure provides a coordinated control system and an energy control method for a multi-source collaborative traction power supply system to solve the problems existing in related technologies.

[0005] In a first aspect, the present disclosure provides a coordinated control system for a multi-source collaborative traction power supply system. The coordinated control system of the multi-source collaborative traction power supply system at least includes a load acquisition module, a photovoltaic and energy storage module, and a coordinated control module;

[0006] The load acquisition module is configured to acquire the traction load of the multiple units in the traction power supply system and send the traction load to the coordinated control module;

[0007] The photovoltaic and energy storage module is configured to acquire the photovoltaic operation state of the photovoltaic inverter, the energy storage operation state of the energy storage inverter, the photovoltaic power generation of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit, and send the photovoltaic operation state, the energy storage operation state, the photovoltaic power generation, and the state of charge of the energy storage unit to the coordinated control module;

[0008] The coordinated control module is configured to determine a target control strategy based on the traction load, the photovoltaic power generation, and the state of charge of the energy storage unit; and use the target control strategy to adjust the photovoltaic operation state and the energy storage operation state to achieve real-time energy control between the photovoltaic and energy storage module and the traction power supply system.

[0009] In some embodiments, the coordinated control module is further configured to determine the operating condition of the traction power supply system based on the traction load; determine a target control strategy from a variety of preset control strategies based on the operating condition, the photovoltaic power generation, and the state of charge of the energy storage unit; where the operating condition includes a traction condition, a braking condition, and a shutdown condition.

[0010] In some embodiments, the target control strategy includes the target power generation of the photovoltaic unit inputting direct current to the photovoltaic inverter and the target output power of the energy storage unit outputting direct current to the energy storage inverter.

[0011] In some embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes: an energy management module;

[0012] The energy management module at least includes an energy management system, which is configured to determine a predicted value of the operating state of the photovoltaic inverter based on the received meteorological station information, and generate a predicted value of the traction load based on the received traction load of the traction power supply system; send the predicted value of the operating state and the predicted value of the traction load to the coordination control module, so that the coordination control module updates the target control strategy based on the traction load, the predicted value of the operating state, the predicted value of the traction load, the photovoltaic operating state, and the energy storage operating state;

[0013] The coordination control system of the multi-source collaborative traction power supply system further includes a main control device of the railway energy dispatching device, and the energy management module further includes a communication management machine and an operator station;

[0014] The operator station is configured to receive the operation control parameters of the coordination control system of the multi-source collaborative traction power supply system set by the user, and send the operation control parameters to the communication management machine;

[0015] The communication management machine is configured to send the received operation control parameters to the coordination control module;

[0016] The coordination control module is further configured to send the received operation control parameters to the main control device of the railway energy dispatching device;

[0017] The main control device of the railway energy dispatching device is configured to use the operation control parameters to control the inverter to dispatch the power of the traction power supply system, and control the traction power supply system to operate in parallel or off-grid.

[0018] In some embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes:

[0019] A microcomputer protection device, which is configured to upload the status information of the microcomputer protection device to the coordination control module and receive the microcomputer protection control instructions issued by the coordination control module.

[0020] In a second aspect, the present disclosure provides an energy control method, which is applied to the coordination control system of the multi-source collaborative traction power supply system according to the embodiments of the present disclosure. The coordination control system of the multi-source collaborative traction power supply system at least includes a load acquisition module, a photovoltaic energy storage module, and a coordination control module. The energy control method includes:

[0021] The load acquisition module acquires the traction load of the multiple unit trains in the traction power supply system and sends the traction load to the coordination control module.

[0022] The photovoltaic energy storage module acquires the photovoltaic operation state of the photovoltaic inverter, the energy storage operation state of the energy storage inverter, the photovoltaic power generation situation of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit, and sends the photovoltaic operation state, the energy storage operation state, the photovoltaic power generation situation, and the state of charge of the energy storage unit to the coordination control module.

[0023] Based on the traction load, the photovoltaic power generation situation, and the state of charge of the energy storage unit, the coordination control module determines a target control strategy; and uses the target control strategy to adjust the photovoltaic operation state and the energy storage operation state to achieve real-time energy control between the photovoltaic energy storage module and the traction power supply system.

[0024] In some embodiments, the coordination control module determines a target control strategy based on the traction load, the photovoltaic power generation situation, and the state of charge of the energy storage unit, including:

[0025] The coordination control module determines the operating condition of the traction power supply system based on the traction load; and determines a target control strategy from a variety of preset control strategies based on the operating condition, the photovoltaic power generation situation, and the state of charge of the energy storage unit. The operating condition includes a traction condition, a braking condition, and a shutdown condition.

[0026] In some embodiments, the target control strategy includes the target power generation power of the photovoltaic unit inputting direct current to the photovoltaic inverter and the target output power of the energy storage unit outputting direct current to the energy storage inverter.

[0027] In some embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes an energy management module, and the energy management module at least includes an energy management system.

[0028] The energy control method further includes:

[0029] The energy management system determines a predicted value of the operating state of the PV inverter based on the received meteorological station information, and generates a predicted value of the traction load based on the received traction load of the traction power supply system; sends the predicted value of the operating state and the predicted value of the traction load to the coordination control module, so that the coordination control module updates the target control strategy based on the traction load, the predicted value of the operating state, the predicted value of the traction load, the PV operating state, and the energy storage operating state;

[0030] The coordination control system of the multi-source collaborative traction power supply system further includes a main control device of the railway energy dispatching device, and the energy management module further includes a communication management machine and an operator station;

[0031] The energy control method further includes:

[0032] The operator station receives the operation control parameters of the coordination control system of the multi-source collaborative traction power supply system set by the user, and sends the operation control parameters to the communication management machine;

[0033] The communication management machine sends the received operation control parameters to the coordination control module;

[0034] The coordination control module sends the received operation control parameters to the main control device of the railway energy dispatching device;

[0035] The main control device of the railway energy dispatching device uses the operation control parameters to control the inverter to dispatch the power of the traction power supply system, and control the traction power supply system to operate in parallel or off-grid.

[0036] In some embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes a microcomputer protection device;

[0037] The energy control method further includes:

[0038] The microcomputer protection device uploads the status information of the microcomputer protection device to the coordination control module, and receives the microcomputer protection control instruction issued by the coordination control module.

[0039] A coordinated control system and an energy control method for a multi-source collaborative traction power supply system provided by the present disclosure. The coordinated control system of the multi-source collaborative traction power supply system at least includes: a load acquisition module configured to acquire the traction load of the EMUs in the traction power supply system and send the traction load to the coordinated control module; a photovoltaic and energy storage module configured to acquire the photovoltaic operation state of the photovoltaic inverter, the energy storage operation state of the energy storage inverter, the photovoltaic power generation situation of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit, and send the photovoltaic operation state, the energy storage operation state, the photovoltaic power generation situation, and the state of charge of the energy storage unit to the coordinated control module; a coordinated control module configured to determine a target control strategy based on the traction load, the photovoltaic power generation situation, and the state of charge of the energy storage unit; and use the target control strategy to adjust the photovoltaic operation state and the energy storage operation state to achieve real-time energy control between the photovoltaic and energy storage module and the traction power supply system. The coordinated control system of the multi-source collaborative traction power supply system can be applied to the coordinated control system of the "network-source-energy storage-vehicle" multi-source collaborative traction power supply system of the photovoltaic and energy storage traction power supply system, and is applicable to the structure of large-scale photovoltaic and energy storage directly connected to the grid in the traction power supply system, applicable to the situation of such large-fluctuation loads, and the energy coordination control method of direct grid connection of photovoltaic and energy storage power supply, so as to achieve the real-time performance of electrical quantity acquisition and the fast response of control instructions through point-to-point communication between the coordinated controller and each control unit. Brief Description of the Drawings

[0040] The present disclosure will be described in more detail below based on embodiments and with reference to the drawings:

[0041] Figure 1 The schematic diagram of the communication architecture of a coordinated control system for a multi-source collaborative traction power supply system provided by an embodiment of the present disclosure is shown;

[0042] Figure 2 The schematic diagram of the topological structure of the photovoltaic and energy storage module accessing the traction power supply system provided by an embodiment of the present disclosure is shown;

[0043] Figure 3 The flowchart of determining the target control strategy of the coordinated control system for a multi-source collaborative traction power supply system provided by an embodiment of the present disclosure is shown;

[0044] Figure 4 The first preset control strategy of the coordinated control system for a multi-source collaborative traction power supply system provided by an embodiment of the present disclosure is shown;

[0045] Figure 5 The second preset control strategy of the coordinated control system for a multi-source collaborative traction power supply system provided by an embodiment of the present disclosure is shown;

[0046] Figure 6Shows the third preset control strategy of the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure;

[0047] Figure 7 Shows the fourth preset control strategy of the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure;

[0048] Figure 8 Shows the fifth preset control strategy of the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure;

[0049] Figure 9 Shows the infrastructure diagram of the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure;

[0050] Figure 10 Shows the schematic flowchart of the energy control method provided by the embodiments of the present disclosure. Detailed implementation manners

[0051] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, and to fully understand how the present disclosure uses technical means to solve technical problems and the implementation process of achieving corresponding technical effects and implement accordingly, the following will combine the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The embodiments of the present disclosure and each feature in the embodiments can be combined with each other without conflict, and the formed technical solutions are all within the protection scope of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product or device.

[0053] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0054] With the common development of photovoltaic and railway traction power supply systems, combining the power generation of a photovoltaic power generation system with an energy storage system and directly supplying the generated electric energy to the coordinated control system where the 27.5 kV traction power supply system is located can not only facilitate the comprehensive management of new energy and railway loads, but also avoid the power transmission losses caused by grid connection, which is the development trend of future electrified railways.

[0055] Based on this, the embodiments of the present disclosure provide a coordinated control system for a multi-source collaborative traction power supply system, which directly connects new energy to the traction power supply system. It can consider the fluctuations in photovoltaic power generation and traction loads caused by factors such as the intensity of light, the start and stop of EMUs, and the rapid movement of EMUs, as well as the situation of energy backflow, and realizes the real-time control and power balance of energy in the multi-source collaborative traction power supply system; at the same time, it increases the utilization efficiency of renewable energy and improves the stability of the system.

[0056] In the above-mentioned coordinated control system of the multi-source collaborative traction power supply system, new energy can be directly incorporated into the traction power supply system. The multi-source collaborative traction power supply system is composed of distributed photovoltaic power generation ("source"), energy storage system ("storage"), railway traction power supply system ("vehicle") and power grid ("grid"). By coordinating with each other, it realizes power balance and voltage and frequency stability, thereby realizing autonomy and energy management. Therefore, this multi-source collaborative traction power supply system is also called "grid-source-storage-vehicle".

[0057] Example 1

[0058] Figure 1 The schematic diagram of the communication architecture of a coordinated control system for a multi-source collaborative traction power supply system provided by the embodiments of the present disclosure is shown as follows. Figure 1 As shown, the coordinated control system of the multi-source collaborative traction power supply system includes a coordinated control module, a load acquisition module, a photovoltaic and energy storage module, an energy management module, a main control device of the railway energy scheduling device, and a microcomputer protection device. The functions of each module will be specifically described below.

[0059] (1) Coordinated control module

[0060] The coordinated control module includes a coordinated controller and a coordinated controller switch; among them, the coordinated controller includes a main coordinated controller and at least one standby coordinated controller.

[0061] The coordination controller switch, as the hub for information interaction of the coordination control system of the entire multi-source collaborative traction power supply system, is used to connect the coordination controller, the energy management module, the optical storage module, the load acquisition module, the main control device of the railway energy dispatching device, the microcomputer protection device and other modules to achieve information interaction of the entire system, and all adopt dual redundancy settings to ensure the reliability of information transmission.

[0062] In addition, due to the high-speed movement of EMUs in the traction power supply system, the traction load is in a high-speed moving state, resulting in a relatively fast change in the traction load. Therefore, the coordination control system of the multi-source collaborative traction power supply system has high requirements for the real-time performance of information. Based on this, the connection method between the coordination controller switch and other modules all adopts fiber optic connection to ensure the real-time acquisition and control of the traction load.

[0063] In this coordination control module, the coordination controller, as the brain of the entire system, receives the operating status of the photovoltaic inverter, the operating status of the energy storage inverter, and the state of charge of the energy storage through the coordination controller switch from the optical storage module, receives the electrical quantities at various places in the traction power supply system uploaded by the load acquisition module, and receives the control instructions issued by the energy management module, etc., to achieve functions such as power distribution, primary frequency modulation, dynamic voltage regulation, and inertia support; and issues the corresponding control instructions to the optical storage module and the main control device of the railway energy dispatching to achieve the energy dispatching between the optical storage module and the traction power supply system.

[0064] (2) Optical storage module

[0065] The optical storage module includes an integrated DC conversion main control, an energy storage inverter, a photovoltaic inverter, an energy storage battery, and a photovoltaic busbar box.

[0066] The integrated DC main control connects the energy storage inverter and the photovoltaic inverter through the RS485 protocol, receives the operating status of the photovoltaic inverter and the operating status of the energy storage inverter uploaded by them, and uploads the received operating status of the photovoltaic inverter, the operating status of the energy storage inverter, and the electrical quantity information to the coordination control module through optical fiber.

[0067] In addition, the integrated DC main control also receives the control instructions from the coordination control module through optical fiber and issues them to the photovoltaic inverter and the energy storage inverter to achieve power control of the photovoltaic and energy storage.

[0068] (3) Load acquisition module

[0069] The load acquisition module is mainly responsible for collecting electrical quantities such as voltage and power of all feeders and incoming line sides of the 27.5kV traction power supply system, as well as collecting electrical quantities such as voltage and power at various places in the 10kV traction substation; and packing these electrical quantities into data packets and transmitting them to the coordination control module in the form of optical fiber.

[0070] (4) Energy management module

[0071] The energy management module includes an Energy Management System (EMS), a communication management machine, and an operator station.

[0072] For the energy management module, there is no high real-time requirement, and there is no need to use expensive optical fiber communication. The communication management machine exchanges information with the EMS energy management system in the form of the IEC60870-5-104 standard protocol (referred to as the 104 protocol), communicates with the operator station in the form of the IEC60870-5-103 protocol (referred to as the 103 protocol), communicates with the meteorological station in the form of an RS485 interface, and communicates with the load acquisition module in the form of an optical fiber. After that, the communication management machine converts the data of different communication protocols into a unified protocol and connects to the coordinated control module in the form of an optical fiber.

[0073] The EMS energy management system judges the future power generation status of the photovoltaic inverter by receiving the meteorological station information, the operating status of the photovoltaic inverter and the energy storage inverter in the photovoltaic energy storage module received through the coordinated controller switch, and calculates and generates a traction load prediction value based on the load information at various locations of the traction power supply system received; and based on the above power generation status of the photovoltaic, the operating status of the photovoltaic inverter and the energy storage inverter, and the traction load prediction value, the coordinated control module calculates an economic operation strategy and corresponding execution commands, etc.

[0074] In addition, the communication management machine realizes the human-computer interaction function by connecting to the operator station. The user with the highest level of authority has the engineer management authority and can set various control parameters required to control the operation of the multi-source collaborative traction power supply system to directly control the operation of the multi-source collaborative traction power supply system. Users with other levels of operation authority can also monitor the operation data and alarm prompts of the multi-source collaborative traction power supply system through the operation station.

[0075] (5) Microcomputer protection device

[0076] The microcomputer protection device is connected to the coordinated control switch of the coordinated control module in the form of an optical fiber, uploads the status of the microcomputer protection device to the coordinated control module, and receives the control instructions issued by the coordinated controller.

[0077] Exemplarily, the microcomputer protection device can monitor in real time whether faults such as short circuit, overload, undervoltage, or overvoltage occur in the traction power supply system. When a fault occurs, it controls the corresponding protection action and reports the fault to the coordinated control module; then it receives the control instructions issued by the coordinated controller.

[0078] The microcomputer protection device can also record the fault data of the traction power supply system, such as various electrical parameters at the moment of fault occurrence, such as the magnitude of the fault current, the value of the fault voltage, the fault type, and the time of fault occurrence and other detailed information. These fault data are very important for analyzing the cause of the fault afterwards. The staff can determine the cause of the fault by viewing these data, so as to take targeted measures to prevent the recurrence of similar faults.

[0079] (6) Main control device of railway energy dispatching device

[0080] The main control device of the railway energy dispatching device is also connected to the coordination control switch of the coordination control module through optical fiber, uploads the operation status, power information, and parallel grid connection mode status of the railway energy dispatching device to the coordination control module, and receives the control instructions sent down by the coordination controller to control the power of the inverter to dispatch the traction power supply system and control the parallel grid connection operation.

[0081] As can be seen from the above content, in the coordination control system of the entire multi-source collaborative traction power supply system, the coordination controller can directly communicate with each control unit such as the integrated main control of DC transformation, the main control device of the railway energy dispatching device, the microcomputer protection device, and the load acquisition module through the coordination control switch. Collect information such as the operation status, real-time active power, real-time reactive power, real-time state of charge of the battery pack, and upper and lower limits of the state of charge of the battery pack of the energy storage converter through optical fiber, collect the operation status, real-time active power, and real-time reactive power of the photovoltaic converter, collect the load information at various locations of the traction power supply system, collect the status information of the microcomputer protection device and the status information of the main control device of the railway energy dispatching device, and receive the control information sent down by the EMS energy management system to realize the real-time control of energy in the "network-source-storage-vehicle" multi-source collaborative traction power supply system, increase the energy utilization efficiency, and improve the stability of the system.

[0082] In addition, a point-to-point communication is established between the coordination controller and each control unit such as the integrated main control of DC transformation, the main control device of the railway energy dispatching device, and the microcomputer protection device. Since the coordination controller can directly communicate with each control unit, that is, the coordination controller can send the calculated control instructions to all control units at the shortest time. After receiving the control instructions, each control unit responds quickly according to its own operation status and the given control instructions, shortening the response time of the entire energy storage station. At the same time, the reliability of the control instruction transmission can be ensured, and it is based on the characteristic of sending instructions synchronously at regular intervals.

[0083] Based on this, the coordinated control system of the "network - source - storage - vehicle" multi - source collaborative traction power supply system proposed in the embodiments of the present disclosure is composed of a coordinated control module, a photovoltaic storage module, a load acquisition module, an energy management module, etc., which realizes real - time acquisition and communication of electrical quantities, status quantities, control instructions, etc., and realizes real - time energy control of the "network - source - storage - vehicle" multi - source collaborative traction power supply system, increases energy utilization efficiency, and improves system stability; for the coordinated control system of the energy control of the "network - source - storage - vehicle" multi - source collaborative traction power supply system, a set of control methods for the coordinated control system is proposed to control the energy flow and power balance of the coordinated control system of the "network - source - storage - vehicle" multi - source collaborative traction power supply system, and improve the utilization efficiency of renewable energy and the stability of the system.

[0084] On this basis, in order to realize the full and effective utilization of photovoltaic power generation in the "network - source - storage - vehicle" multi - source collaborative traction power supply system, and at the same time ensure the power balance among energy storage, photovoltaic power generation and traction load, the embodiments of the present disclosure also provide an energy control method for the coordinated control system of the multi - source collaborative traction power supply system. According to the operating conditions of the EMU, the state of charge of the energy storage, and the photovoltaic power generation situation, various operating modes and operating conditions of the multi - source collaborative traction power supply system are divided to realize the recovery and utilization of the regenerative braking energy of the traction power supply system, photovoltaic power consumption, and peak shaving and valley filling of the traction load.

[0085] Figure 2 The schematic diagram of the topological structure of the photovoltaic storage module connected to the traction power supply system provided by the embodiments of the present disclosure is shown as follows. Figure 2 As shown, the AC port of the converter is connected to the 27.5 kV power supply arm of the traction power supply system through two single - phase transformers. The photovoltaic power generation system and the energy storage system are both connected in parallel to the DC bus through bidirectional DC / DC converters, and then connected to both ends of the DC - side capacitor of the converter through the DC bus. Among them, for the grid connection of large - scale photovoltaic power generation systems and energy storage systems, group control is often required. In the topological structure of the photovoltaic storage module connected to the traction power supply system provided by the embodiments of the present disclosure, taking the photovoltaic power generation system including two groups of photovoltaic power generation units and the energy storage system including two groups of energy storage units as an example, an energy control method for the coordinated control system of the multi - source collaborative traction power supply system is proposed.

[0086] The target control strategy of the coordinated control system of the multi - source collaborative traction power supply system is determined from various preset control strategies based on the operating conditions of the EMU in the traction power supply system, the state of charge of the energy storage in the photovoltaic storage module, and the photovoltaic power generation situation.

[0087] For example, according to the operating conditions of the multiple-unit train in the traction power supply system (including the traction condition, braking condition, and outage condition), the state of charge of two energy storage units, and the power generation of two photovoltaic units, it can be divided into 20 preset operating modes. Among these 20 preset operating modes, first, it can be divided according to the operating conditions of the multiple-unit train in the traction power supply system, into three operating conditions: traction condition, braking condition, and outage condition. Among these three conditions, according to the magnitude of the load in the traction power supply system, the operating conditions of the inverter, and the power generation of the photovoltaic units, etc., the 20 preset operating modes can be further subdivided into six preset control strategies: the first preset control strategy A, the second preset control strategy B, the third preset control strategy C, the fourth preset control strategy D, the fifth preset control strategy E, and the sixth preset control strategy. Among these six preset control strategies, they are further subdivided into 20 operating modes according to the state of charge of the energy storage units.

[0088] The specific content of the energy control method provided by the embodiments of the present disclosure is described as follows:

[0089] Figure 3 The flowchart showing the determination of the target control strategy of the coordinated control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure is as follows. As Figure 3 shown, first, according to the traction load P Load judge the operating condition of the traction power supply system; then, according to the operating conditions of the inverter and the power generation of the photovoltaic units in the photovoltaic storage module, judge the target control strategy executed by the coordinated control system of the multi-source collaborative traction power supply system:

[0090] When the traction load P Load is less than the traction condition judgment threshold P tra0 and less than or equal to the braking condition judgment threshold P reg0 (that is, P Load <P tra0 and P Load ≤P reg0 ), the operating condition of the traction power supply system is the braking condition. Then, execute the judgment of whether the traction load P Load is less than or equal to the single-inverter braking state judgment threshold P reg (that is, P Load ≤P reg ) holds. When the traction load P Load is less than the single-inverter braking state judgment threshold P reg , execute the first preset control strategy A with two inverters in operation, and the first preset control strategy A is as Figure 4 shown; otherwise, execute the second preset control strategy B with one inverter in operation, and the second preset control strategy B is as Figure 5 shown.

[0091] When the traction load PLoad Greater than or equal to the traction condition judgment threshold P tra0 (i.e., P Load ≥P tra0 ), the operating condition of the traction power supply system is the traction condition. Then, execute the judgment of the traction load P Load Greater than or equal to the traction state judgment threshold P of a single inverter tra (i.e., P Load ≥P tra ). When the traction load P Load Greater than or equal to the traction state judgment threshold P of a single inverter tra , continue to execute the judgment of P Load ≥PPV 1 +PPV 2 Whether it holds. If the load P Load Greater than or equal to the maximum power PPV of the 1# photovoltaic converter 1 And the sum of the maximum power PPV of the 2# photovoltaic converter 2 , execute the third preset control strategy C as shown in Figure 6 ; otherwise, execute the fourth preset control strategy D as shown in Figure 7 . When the traction load P Load Less than the traction state judgment threshold P of a single inverter tra , then execute the fifth preset control strategy E of simultaneously putting into operation two photovoltaic converters. The fifth preset control strategy E is as shown in Figure 8 .

[0092] It should be noted that the maximum power PPV of the 1# photovoltaic converter 1 And the maximum power PPV of the 2# photovoltaic converter 2 Are both related to weather, light intensity, etc. For example: at noon on a sunny day, the greater the light intensity, the larger the values of PPV 1 And PPV 2 ; the smaller the light intensity, the smaller the values of PPV 1 And PPV 2 .

[0093] As shown in Figure 3 , when the traction load P Load Less than the traction condition judgment threshold P tra0 , and greater than the braking condition judgment threshold P reg0When the traction power supply system is in the outage operating condition, the sixth preset control strategy is executed. The sixth preset control strategy specifically includes: the output power of energy storage group 1 is Bat1_Pref = 0; the output power of energy storage group 2 is Bat2_Pref = 0; the working mode of PV group 1 is PV1_mode = 0, and power generation stops; the working mode of PV group 2 is PV2_mode = 0, and power generation stops; the power generation power of PV group 1 is PV1_Pref = 0; the power generation power of PV group 2 is PV2_Pref = 0.

[0094] It can be seen that the power generation situation of the photovoltaic unit in the coordinated control system of the multi-source collaborative traction power supply system is divided into 3 operating conditions, 5 control strategies, and 20 working modes, realizing the full and effective utilization of photovoltaic power generation in the traction power supply system while ensuring the power balance among energy storage, photovoltaic power generation, and traction load, and realizing the recovery and utilization of the regenerative braking energy of the traction power supply system, photovoltaic accommodation, and peak shaving and valley filling of the traction load. The designed method can be extended to the coordinated control system of a larger-scale "network-source-storage-vehicle" multi-source collaborative traction power supply system using more photovoltaic and energy storage groups.

[0095] The coordinated control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure can be applied to the coordinated control system of the "network-source-storage-vehicle" multi-source collaborative traction power supply system of the photovoltaic and energy storage traction power supply system, and is applicable to the structure of large-scale photovoltaic and energy storage directly connected to the grid in the traction power supply system, applicable to this situation of large fluctuating loads and the energy coordination control method of direct grid connection of the photovoltaic and energy storage power supply, so as to realize the real-time acquisition of electrical quantities and the fast response of control instructions through point-to-point communication between the coordinated controller and each control unit.

[0096] The energy control method of the coordinated control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure is applicable to the structure of large-scale photovoltaic and energy storage connected to the grid, and considering the situation of large load fluctuations and fast load movement such as the traction power supply system, as well as the recovery and utilization of the energy of regenerative braking, while realizing the full utilization of photovoltaic electric energy in the traction power supply system, ensuring the power balance among energy storage, photovoltaic, and traction load.

[0097] Example 2

[0098] Based on the above content, the embodiments of the present disclosure provide a coordinated control system for a multi-source collaborative traction power supply system. Figure 9 The basic architecture diagram of the coordinated control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure is shown. As Figure 9 shown, the coordinated control system of the multi-source collaborative traction power supply system at least includes a load acquisition module 901, a photovoltaic and energy storage module 902, and a coordinated control module 903;

[0099] A load acquisition module 901, configured to acquire the traction load of the multiple unit train in the traction power supply system and send the traction load to a coordination control module 903;

[0100] A photovoltaic and energy storage module 902, configured to acquire the photovoltaic operation state of the photovoltaic inverter, the energy storage operation state of the energy storage inverter, the photovoltaic power generation condition of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit, and send the photovoltaic operation state, the energy storage operation state, the photovoltaic power generation condition, and the state of charge of the energy storage unit to the coordination control module 903;

[0101] A coordination control module 903, configured to determine a target control strategy based on the traction load, the photovoltaic power generation condition, and the state of charge of the energy storage unit; and use the target control strategy to adjust the photovoltaic operation state and the energy storage operation state to achieve real-time energy control between the photovoltaic and energy storage module 902 and the traction power supply system.

[0102] In specific implementation, due to the high-speed movement of the multiple unit train in the traction power supply system, the traction load is in a high-speed movement state, resulting in a relatively fast change in the traction load. Therefore, the multi-source collaborative traction power supply system has a high requirement for the real-time performance of information. Based on this, the load acquisition module 901 acquires the traction load of the multiple unit train in the traction power supply system in real time, and the photovoltaic and energy storage module 902 acquires the photovoltaic operation state of the photovoltaic inverter, the energy storage operation state of the energy storage inverter, the photovoltaic power generation condition of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit.

[0103] At the same time, both the load acquisition module 901 and the photovoltaic and energy storage module 902 communicate with the coordination control module 903 in real time by means of optical fibers to ensure the real-time performance of the information obtained by the coordination control module 903.

[0104] Exemplarily, the coordination control module may include a coordination controller and a coordination controller switch; wherein, the coordination controller includes a main coordination controller and at least one standby coordination controller.

[0105] The coordination controller switch, as the hub of information interaction of the entire multi-source collaborative traction power supply system, is configured to connect the coordination controller, connect the photovoltaic and energy storage module, and connect the load acquisition module to achieve information interaction of the entire system, and both adopt a dual-redundancy setting to ensure the reliability of information transmission.

[0106] The connection methods between the coordination controller switch and other modules all adopt fiber optic connections to ensure the real-time acquisition and control of traction loads, to ensure the real-time acquisition of traction loads during the high-speed movement of EMUs in the traction power supply system, and thus, considering large fluctuations in railway traction loads, energy feedback, and rapid movement of traction loads, etc., combined with the photovoltaic power generation situation and the state of charge of energy storage, a target control strategy can be determined; and using the target control strategy, the operating states of the photovoltaic system and the energy storage system are adjusted to achieve real-time energy control between the photovoltaic and energy storage modules and the traction power supply system.

[0107] In this coordination control module, the coordination controller, as the brain of the entire system, receives the operating states of the photovoltaic inverter, the energy storage inverter, and the state of charge of the energy storage uploaded by the photovoltaic and energy storage modules through the coordination controller switch, and receives the electrical quantities at various locations in the traction power supply system uploaded by the load acquisition module to achieve real-time energy scheduling between the photovoltaic and energy storage modules and the traction power supply system.

[0108] Based on this, the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure can be applied to the coordination control system of the "network-source-energy storage-vehicle" multi-source collaborative traction power supply system of the photovoltaic and energy storage traction power supply system, and is applicable to the structure of large-scale photovoltaic and energy storage directly connected to the grid in the traction power supply system, applicable to this situation of large fluctuating loads and the energy coordination control method of direct grid connection of photovoltaic and energy storage power supply, so as to achieve the real-time acquisition of electrical quantities and the rapid response of control instructions through point-to-point communication between the coordination controller and each control unit.

[0109] Example 3

[0110] On the basis of the above embodiments, the coordination control module 903 is further configured to determine the operating conditions of the traction power supply system based on the traction load; and determine the target control strategy from a variety of preset control strategies based on the operating conditions, the photovoltaic power generation situation, and the state of charge of the energy storage.

[0111] Here, the operating conditions of the above traction power supply system may include traction conditions, braking conditions, and outage conditions. The judgment processes of the traction conditions, braking conditions, and outage conditions can refer to the relevant content above, and will not be elaborated here.

[0112] The above variety of preset control strategies may include a first preset control strategy, a second preset control strategy, a third preset control strategy, a fourth preset control strategy, and a fifth preset control strategy. The relevant content of the first preset control strategy, the second preset control strategy, the third preset control strategy, the fourth preset control strategy, the fifth preset control strategy, and the sixth preset control strategy refers to the above, and will not be elaborated here.

[0113] The flowchart of the determination process of the above target control strategy can be referred to the relevant content in the previous text Figure 3 and will not be elaborated here.

[0114] Example 4

[0115] Based on the above embodiments, the target control strategy includes the target power generation of the photovoltaic unit inputting direct current to the photovoltaic converter and the target output power of the energy storage unit outputting direct current to the energy storage converter.

[0116] As Figure 3 shown, when the traction load P Load is less than the traction condition judgment threshold P tra0 , and greater than the braking condition judgment threshold P reg0 , the operating condition of the traction power supply system is the shutdown condition, and the sixth preset control strategy is executed.

[0117] The sixth preset control strategy specifically includes: the output power of energy storage group 1 is Bat1_Pref = 0; the output power of energy storage group 2 is Bat2_Pref = 0; the working mode of photovoltaic group 1 is PV1_mode = 0, and power generation stops; the working mode of photovoltaic group 2 is PV2_mode = 0, and power generation stops; the power generation power of photovoltaic group 1 is PV1__Pref = 0; the power generation power of photovoltaic group 2 is PV2__Pref = 0.

[0118] Example 5

[0119] Based on the above embodiments, the coordinated control system of the multi-source collaborative traction power supply system further includes: an energy management module;

[0120] The energy management module at least includes an energy management system, and the energy management system is configured to:

[0121] Determine the predicted value of the operating state of the photovoltaic converter based on the received meteorological station information;

[0122] Generate a predicted value of the traction load based on the received traction load of the traction power supply system;

[0123] Send the predicted value of the operating state and the predicted value of the traction load to the coordinated control module, so that the coordinated control module updates the target control strategy based on the traction load, the predicted value of the operating state, the predicted value of the traction load, the photovoltaic operating state, and the energy storage operating state.

[0124] In addition, since there is no high real-time requirement for the energy management module and expensive optical fiber communication is not needed, the communication management machine exchanges information with the EMS energy management system in the form of the IEC60870-5-104 standard protocol (referred to as the 104 protocol), communicates with the operator station in the form of the IEC60870-5-103 protocol (referred to as the 103 protocol), communicates with the meteorological station in the form of an RS485 interface, and communicates with the load acquisition module in the form of optical fiber. After that, the communication management machine converts the data of different communication specifications into a unified protocol and connects to the coordination control module in the form of optical fiber.

[0125] The energy management system can judge the predicted operating state value of the future PV inverter, that is, the predicted power generation state value, through the received meteorological station information; through the operating states of the PV inverter and the energy storage inverter in the optical storage module received by the coordination controller switch, calculate and generate the load prediction value through the load information at various places of the traction power supply system received; and based on the above predicted operating state values, the operating states of the PV inverter and the energy storage inverter, and the traction load prediction value, enable the coordination control module to calculate the economic operation strategy and corresponding execution commands, etc.

[0126] Example 6

[0127] Based on the above embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes the main control device of the railway energy scheduling device, and the energy management module further includes a communication management machine and an operator station;

[0128] The operator station is configured to receive the operation control parameters of the coordination control system of the multi-source collaborative traction power supply system set by the user and send the operation control parameters to the communication management machine;

[0129] The communication management machine is configured to send the received operation control parameters to the coordination control module;

[0130] The coordination control module is further configured to send the received operation control parameters to the main control device of the railway energy scheduling device;

[0131] The main control device of the railway energy scheduling device is configured to use the operation control parameters to control the inverter to schedule the power of the traction power supply system and control the traction power supply system to operate in parallel or in island mode.

[0132] Here, the communication management machine realizes the human-machine interaction function by connecting to the operator station. The user with the highest level of authority has the engineer management authority and can set various control parameters required to control the operation of the multi-source collaborative traction power supply system to directly control the operation of the multi-source collaborative traction power supply system. Users with other levels of operation authority can also monitor the operation data and alarm prompts of the multi-source collaborative traction power supply system through the operation station.

[0133] The main control device of the railway energy dispatching device is also connected to the coordination control switch of the coordination control module through optical fiber, uploads the operating status, power information, and islanding mode status of the traction power supply system to the coordination control module, and receives the control instructions sent down by the coordination controller to control the inverter to dispatch the power of the traction power supply system and control the traction power supply system to operate in parallel or islanded mode.

[0134] Example 7

[0135] Based on the above embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes:

[0136] A microcomputer protection device, configured to upload the status information of the microcomputer protection device to the coordination control module and receive the microcomputer protection control instructions sent down by the coordination control module.

[0137] Here, the microcomputer protection device is connected to the coordination control switch of the coordination control module by optical fiber, uploads the status of the microcomputer protection device to the coordination control module, and receives the control instructions sent down by the coordination controller.

[0138] Exemplarily, the microcomputer protection device can monitor in real time whether faults such as short circuit, overload, under-voltage or over-voltage occur in the traction power supply system. When a fault occurs, it performs corresponding protection actions and reports the fault to the coordination control module; then it receives the control instructions sent down by the coordination controller.

[0139] The microcomputer protection device can also record the fault data of the traction power supply system, such as various electrical parameters at the moment of fault occurrence, such as the magnitude of the fault current, the value of the fault voltage, the fault type, and the time of fault occurrence and other detailed information. These fault data are very important for analyzing the cause of the fault afterwards. The staff can view these data to determine the cause of the fault, so as to take targeted measures to prevent the recurrence of similar faults.

[0140] Example 8

[0141] Based on the above embodiments, the embodiments of the present disclosure also provide an energy control method, which is applied to the coordination control system of the multi-source collaborative traction power supply system of the embodiments of the present disclosure. The coordination control system of the multi-source collaborative traction power supply system at least includes a load acquisition module, a photovoltaic and energy storage module, and a coordination control module.

[0142] Figure 10 The flow chart of the energy control method provided by the embodiments of the present disclosure is shown. As Figure 10 shown, the energy control method includes:

[0143] S1001, the load acquisition module acquires the traction load of the multiple unit train in the traction power supply system and sends the traction load to the coordination control module;

[0144] S1002, the photovoltaic and energy storage module acquires the photovoltaic operation status of the photovoltaic inverter, the energy storage operation status of the energy storage inverter, the photovoltaic power generation situation of the photovoltaic unit, and the state of charge of the energy storage unit of the energy storage unit, and sends the photovoltaic operation status, the energy storage operation status, the photovoltaic power generation situation, and the state of charge of the energy storage unit to the coordination control module;

[0145] S1003, the coordination control module determines the target control strategy based on the traction load, the photovoltaic power generation situation, and the state of charge of the energy storage unit; uses the target control strategy to adjust the photovoltaic operation status and the energy storage operation status to achieve real-time energy control between the photovoltaic and energy storage module and the traction power supply system.

[0146] Here, for specific content, refer to the part of the coordination control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0147] The energy control method of the coordination control system of the multi-source collaborative traction power supply system provided by the embodiments of the present disclosure is applicable to the structure of large-scale photovoltaic and energy storage grid connection, and considering the situation of large load fluctuations and fast load movement such as the traction power supply system, as well as the energy recovery and utilization of regenerative braking, while realizing the full utilization of photovoltaic electric energy in the traction power supply system, ensuring the power balance of energy storage, photovoltaic, and traction loads.

[0148] Example 9

[0149] Based on the above embodiments, the coordination control module determines the target control strategy based on the traction load, the photovoltaic power generation situation, and the state of charge of the energy storage unit, which may include:

[0150] The coordination control module determines the operating condition of the traction power supply system based on the traction load; determines the target control strategy from multiple preset control strategies based on the operating condition, the photovoltaic power generation situation, and the state of charge of the energy storage unit; where the operating condition includes the traction condition, the braking condition, and the outage condition.

[0151] Here, for specific content, refer to the part of the coordination control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0152] Example 10

[0153] Based on the above embodiments, the target control strategy includes the target power generation power of the photovoltaic unit inputting direct current to the photovoltaic inverter and the target output power of the energy storage unit outputting direct current to the energy storage inverter.

[0154] Here, for specific content, refer to the part of the coordinated control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0155] Example 11

[0156] Based on the above embodiments, the coordinated control system of the multi-source collaborative traction power supply system further includes an energy management module, and the energy management module at least includes an energy management system;

[0157] The energy control method further includes:

[0158] The energy management system determines the predicted value of the operating state of the photovoltaic inverter based on the received meteorological station information; generates a predicted value of the traction load based on the received traction load of the traction power supply system; and sends the predicted value of the operating state and the predicted value of the traction load to the coordinated control module, so that the coordinated control module updates the target control strategy based on the traction load, the predicted value of the operating state, the predicted value of the traction load, the photovoltaic operating state, and the energy storage operating state.

[0159] Here, for specific content, refer to the part of the coordinated control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0160] Example 12

[0161] Based on the above embodiments, the coordinated control system of the multi-source collaborative traction power supply system further includes the main control device of the railway energy dispatching device, and the energy management module further includes a communication management machine and an operator station;

[0162] The energy control method further includes:

[0163] The operator station receives the operation control parameters of the coordinated control system of the multi-source collaborative traction power supply system set by the user, and sends the operation control parameters to the communication management machine;

[0164] The communication management machine sends the received operation control parameters to the coordinated control module;

[0165] The coordinated control module sends the received operation control parameters to the main control device of the railway energy dispatching device;

[0166] The main control device of the railway energy dispatching device uses the operation control parameters to control the inverter to dispatch the power of the traction power supply system, and control the traction power supply system to operate in parallel or off-grid.

[0167] Here, for specific content, refer to the part of the coordinated control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0168] Example 13

[0169] Based on the above embodiments, the coordination control system of the multi-source collaborative traction power supply system further includes a microcomputer protection device; the energy control method further includes:

[0170] The microcomputer protection device uploads the status information of the microcomputer protection device to the coordination control module and receives the microcomputer protection control instruction issued by the coordination control module.

[0171] Here, for specific content, refer to the part of the coordination control system of the multi-source collaborative traction power supply system in the previous text, which will not be elaborated here.

[0172] It should be noted that in this disclosure, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element limited by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0173] Although the disclosed embodiments are as above, the above content is only an embodiment adopted for the convenience of understanding this disclosure and is not intended to limit this disclosure. Any person skilled in the art within the technical field to which this disclosure pertains may make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed in this disclosure. However, the scope of patent protection of this disclosure shall still be subject to the scope defined by the appended claims.

Claims

1. A coordinated control system for a multi-source collaborative traction power supply system, characterized in that: The coordinated control system of the multi-source coordinated traction power supply system at least includes a load acquisition module, a photovoltaic storage module and a coordinated control module; The load acquisition module is configured to acquire the traction load of the EMU in the traction power supply system and send the traction load to the coordination control module; The photovoltaic storage module is configured to collect the photovoltaic operation status of the photovoltaic converter, the energy storage operation status of the energy storage converter, the photovoltaic power generation status of the photovoltaic unit and the energy storage charge status of the energy storage unit, and send the photovoltaic operation status, the energy storage operation status, the photovoltaic power generation status and the energy storage charge status to the coordination control module; The coordination control module is configured to determine a target control strategy based on the traction load, the photovoltaic power generation situation and the energy storage charge state; and use the target control strategy to adjust the photovoltaic operating state and the energy storage operating state to achieve real-time energy control between the photovoltaic storage module and the traction power supply system.

2. The coordinated control system of the multi-source cooperative traction power supply system according to claim 1, characterized in that: The coordination control module is also configured to determine the operating condition of the traction power supply system based on the traction load; determine the target control strategy from a plurality of preset control strategies based on the operating condition, the photovoltaic power generation condition and the energy storage charge state; wherein the operating condition includes traction condition, braking condition and shutdown condition.

3. The coordinated control system of the multi-source cooperative traction power supply system according to claim 1, characterized in that: The target control strategy includes a target power generation of direct current input by the photovoltaic unit to the photovoltaic converter and a target output power of direct current output by the energy storage unit to the energy storage converter.

4. The coordinated control system of the multi-source cooperative traction power supply system according to claim 1, characterized in that: The coordinated control system of the multi-source cooperative traction power supply system further includes: an energy management module; The energy management module at least includes an energy management system, and the energy management system is configured to: Determining a predicted value of an operating state of the photovoltaic inverter based on the received weather station information; generating a traction load prediction value based on the received traction load of the traction power supply system; Sending the operating state prediction value and the traction load prediction value to the coordination control module, so that the coordination control module updates the target control strategy based on the traction load, the operating state prediction value, the traction load prediction value, the photovoltaic operating state and the energy storage operating state; The coordinated control system of the multi-source coordinated traction power supply system also includes a railway energy dispatching device main control device, and the energy management module also includes a communication management machine and an operator station; The operator station is configured to receive operation control parameters of the coordinated control system of the multi-source coordinated traction power supply system set by a user, and send the operation control parameters to the communication management machine; The communication management machine is configured to send the received operation control parameters to the coordination control module; The coordination control module is also configured to send the received operation control parameters to the railway energy dispatching device main control device; The railway energy dispatching device main control device is configured to use the operation control parameters to control the inverter to dispatch the power of the traction power supply system, and to control the traction power supply system to be grid-connected or isolated.

5. The coordinated control system of the multi-source coordinated traction power supply system according to any one of claims 1 to 4, characterized in that: The coordinated control system of the multi-source coordinated traction power supply system also includes: The microcomputer protection device is configured to upload the status information of the microcomputer protection device to the coordination control module and receive the microcomputer protection control instructions issued by the coordination control module.

6. An energy control method, applied to the coordinated control system of a multi-source coordinated traction power supply system according to any one of claims 1 to 5, wherein the coordinated control system of the multi-source coordinated traction power supply system comprises at least a load acquisition module, a photovoltaic storage module and a coordinated control module; characterized in that: The energy control method comprises: The load acquisition module acquires the traction load of the EMU in the traction power supply system and sends the traction load to the coordination control module; The photovoltaic storage module collects the photovoltaic operation status of the photovoltaic converter, the energy storage operation status of the energy storage converter, the photovoltaic power generation status of the photovoltaic unit and the energy storage charge status of the energy storage unit, and sends the photovoltaic operation status, the energy storage operation status, the photovoltaic power generation status and the energy storage charge status to the coordination control module; The coordination control module determines a target control strategy based on the traction load, the photovoltaic power generation situation and the energy storage charge state; and uses the target control strategy to adjust the photovoltaic operation state and the energy storage operation state to achieve real-time energy control between the photovoltaic storage module and the traction power supply system.

7. The energy control method according to claim 6, characterized in that: The coordination control module determines a target control strategy based on the traction load, the photovoltaic power generation situation and the energy storage charge state, including: The coordination control module determines the operating condition of the traction power supply system based on the traction load; Based on the operating conditions, the photovoltaic power generation conditions and the energy storage charge state, a target control strategy is determined from a plurality of preset control strategies; wherein the operating conditions include traction conditions, braking conditions and shutdown conditions.

8. The energy control method according to claim 6, characterized in that: The target control strategy includes a target power generation of direct current input by the photovoltaic unit to the photovoltaic converter and a target output power of direct current output by the energy storage unit to the energy storage converter.

9. The energy control method according to claim 6, characterized in that: The coordinated control system of the multi-source cooperative traction power supply system further includes an energy management module, and the energy management module at least includes an energy management system; The energy control method further comprises: The energy management system determines the operation state prediction value of the photovoltaic converter based on the received weather station information, and generates the traction load prediction value based on the received traction load of the traction power supply system; sends the operation state prediction value and the traction load prediction value to the coordination control module, so that the coordination control module updates the target control strategy based on the traction load, the operation state prediction value, the traction load prediction value, the photovoltaic operation state and the energy storage operation state; The coordinated control system of the multi-source coordinated traction power supply system also includes a railway energy dispatching device main control device, and the energy management module also includes a communication management machine and an operator station; The energy control method further comprises: The operator station receives the operation control parameters of the coordinated control system of the multi-source coordinated traction power supply system set by the user, and sends the operation control parameters to the communication management machine; The communication management machine sends the received operation control parameters to the coordination control module; The coordination control module sends the received operation control parameters to the railway energy dispatching device main control device; The railway energy dispatching device main control device uses the operation control parameters to control the inverter to dispatch the power of the traction power supply system, and controls the traction power supply system to operate in parallel or in an isolated grid.

10. The energy control method according to any one of claims 6 to 9, characterized in that: The coordinated control system of the multi-source coordinated traction power supply system also includes a microcomputer protection device; The energy control method further comprises: The microcomputer protection device uploads the status information of the microcomputer protection device to the coordination control module, and receives the microcomputer protection control instruction issued by the coordination control module.

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