Large energy regenerative braking energy storage control method and device for electrified railway trains

Abstract

The present invention is applicable to the technical field of electrified railways, and provides a large-energy regenerative braking energy storage control method and device for electrified railway trains. The method comprises: collecting the current information and voltage information of the first power supply arm of the traction substation, and calculating the real-time power of the first power supply arm according to the current information and the voltage information to obtain the first real-time power; collecting the current information and the voltage information of the second power supply arm of the traction substation, and calculating the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power; generating an energy transfer instruction according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy. The present invention can realize energy regulation between different power supply arms and improve the utilization rate of regenerative braking energy.

Description

Technical Field

[0001] The present invention relates to the technical field of electrified railways, and in particular to a large-energy regenerative braking energy storage control method and device for an electrified railway train. Background Art

[0002] Electrified railway refers to a railway that can power electric locomotives. It is widely used in the construction of high-speed railways and urban rail transit. Electrified railways are large consumers of electricity, especially on some railway lines with long and steep slopes. Trains consume a lot of electricity when going uphill, but require less electricity when going downhill, which can easily cause instability in the traction power supply network. In addition, some trains start and stop frequently, and the trains also consume more electricity when starting. The use of electric brakes to slow down or stop will cause energy waste, which requires the recovery and reuse of regenerative braking energy. At present, the two power supply arms of the traction substation supply power to the opposite trains respectively. Due to the different current phases of different power supply arms, different power supply arms are often independently controlled, so the regenerative braking energy generated by the train when going downhill or stopping is easily wasted, resulting in low utilization of regenerative braking energy.

[0003] How to efficiently utilize regenerative braking energy is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present invention provide a large-energy regenerative braking energy storage control method and device for an electrified railway train to solve the problem that the regenerative braking energy is difficult to efficiently utilize.

[0005] In a first aspect, an embodiment of the present invention provides a large energy regenerative braking energy storage control method for an electrified railway train, comprising:

[0006] Collecting current information and voltage information of the first power supply arm of the traction substation, and calculating the real-time power of the first power supply arm according to the current information and the voltage information to obtain the first real-time power;

[0007] Collecting current information and voltage information of the second power supply arm of the traction substation, and calculating the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power;

[0008] An energy transfer instruction is generated according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy.

[0009] In a possible implementation, generating an energy transfer instruction according to the first real-time power and the second real-time power includes:

[0010] Determine the train running state corresponding to the first power supply arm according to the first real-time power, and obtain the first running state;

[0011] Determine the train running state corresponding to the second power supply arm according to the second real-time power, and obtain the second running state;

[0012] An energy transfer command is generated based on the first operating state and the second operating state.

[0013] In a possible implementation, determining the train running state corresponding to the first power supply arm according to the first real-time power to obtain the first running state includes:

[0014] If the first real-time power is greater than zero, the first operating state is a traction state;

[0015] If the first real-time power is not greater than zero, the first operating state is a braking state.

[0016] In a possible implementation, determining the train running state corresponding to the second power supply arm according to the second real-time power to obtain the second running state includes:

[0017] If the second real-time power is greater than zero, the second operating state is the traction state;

[0018] If the second real-time power is not greater than zero, the second operating state is a braking state.

[0019] In a possible implementation, generating an energy transfer instruction according to the first operating state and the second operating state includes:

[0020] If the first operating state is a braking state and the second operating state is a traction state, a first braking energy generated by the train in the braking state and a first traction energy required by the train in the traction state are respectively obtained;

[0021] generating a first energy transfer instruction according to the first braking energy and the first traction energy;

[0022] or,

[0023] If the first operating state is a traction state and the second operating state is a braking state, a second traction energy required by the train in the traction state and a second braking energy generated by the train in the braking state are respectively obtained;

[0024] A second energy transfer command is generated based on the second traction energy and the second braking energy.

[0025] In a possible implementation, the first energy transfer instruction is used to:

[0026] If the first braking energy is not greater than the first traction energy, transferring the first braking energy to the second power supply arm;

[0027] If the first braking energy is greater than the first traction energy, the first braking energy is divided into first transfer energy and first storage energy, and the first transfer energy is transferred to the second power supply arm, and the first storage energy is stored in the first energy storage system;

[0028] If the first stored energy in the first energy storage system is higher than a preset threshold, the first stored energy is stored in the second energy storage system;

[0029] wherein the first transfer energy is equal to the first traction energy;

[0030] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0031] In a possible implementation, the second energy transfer instruction is used to:

[0032] If the second braking energy is not greater than the second traction energy, transferring the second braking energy to the first power supply arm;

[0033] If the absolute value of the second braking energy is greater than the second traction energy, the second braking energy is divided into second transfer energy and second storage energy, and the second transfer energy is transferred to the first power supply arm, and the second storage energy is stored in the second energy storage system;

[0034] If the second stored energy in the second energy storage system is higher than a preset threshold, the second stored energy is stored in the first energy storage system;

[0035] wherein the second transfer energy is equal to the second pulling energy;

[0036] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0037] A second aspect of the present invention provides a large energy regenerative braking energy storage control device for an electrified railway train, comprising:

[0038] The first acquisition unit is used to collect current information and voltage information of the first power supply arm of the traction substation, and calculate the real-time power of the first power supply arm according to the current information and the voltage information to obtain the first real-time power;

[0039] The second acquisition unit is used to collect current information and voltage information of the second power supply arm of the traction substation, and calculate the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power;

[0040] The control unit is used to generate an energy transfer instruction according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy.

[0041] The third aspect of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of any of the above-mentioned methods for controlling large-energy regenerative braking energy storage of an electrified railway train are implemented.

[0042] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods for controlling large-energy regenerative braking energy storage of an electrified railway train.

[0043] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0044] On the one hand, the embodiment of the present invention collects the current information and voltage information of the first power supply arm of the traction substation, and calculates the real-time power of the first power supply arm according to the current information and voltage information to obtain the first real-time power; on the other hand, the current information and voltage information of the second power supply arm of the traction substation are collected, and the real-time power of the second power supply arm is calculated according to the current information and voltage information to obtain the second real-time power; finally, an energy transfer instruction is generated according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy. Since the regenerative braking energy generated on the first power supply arm and the second power supply arm is uniformly controlled and transferred through the energy transfer instruction, the embodiment of the present invention can realize energy regulation between the two power supply arms and improve the utilization rate of the regenerative braking energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] Figure 1 It is a flow chart for realizing a large energy regenerative braking energy storage control method for an electrified railway train provided by an embodiment of the present invention;

[0047] Figure 2 It is a structural schematic diagram of a large-energy regenerative braking energy storage control device for an electrified railway train provided by an embodiment of the present invention;

[0048] Figure 3 It is a specific structural schematic diagram of a control unit of a large-energy regenerative braking energy storage control device for an electrified railway train provided by an embodiment of the present invention;

[0049] Figure 4 is a schematic diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0051] In order to make the purpose, technical solutions and advantages of the present invention more clear, specific embodiments will be described below in conjunction with the accompanying drawings.

[0052] It should be noted that the application scenarios of the present invention are described in detail as follows: A large number of electrical equipment are installed along the electrified railway to provide continuous power energy for electric locomotives (including EMU combinations and non-EMUs). The electric locomotives themselves do not carry energy, and the required electric energy is provided by the electric traction power supply system. The traction power supply system is mainly composed of two parts: a traction substation and an overhead contact network (or power supply rail). The substation is located near the railway. It sends the current sent from the power plant through high-voltage transmission lines or high-voltage transmission cables to the overhead contact network above the railway or the power supply track next to the rails. The traction substation divides the overhead contact network between them into two power supply partitions, also called power supply arms. Generally, two adjacent power supply arms are insulated on the overhead contact network. The overhead contact network or power supply rail is an electrical device that directly transmits electric energy to the electric locomotive. The electric locomotive obtains the required electric energy from the overhead contact network or power supply rail through a pantograph or conductive wheels.

[0053] See also Figure 1 , which shows a flow chart of the implementation of the large energy regenerative braking energy storage control method for an electrified railway train provided by an embodiment of the present invention, and is described in detail as follows:

[0054] In step S101, current information and voltage information of a first power supply arm of a traction substation are collected, and the real-time power of the first power supply arm is calculated according to the current information and the voltage information to obtain a first real-time power.

[0055] It should be noted that the traction substation is divided into two power supply sections, also called two power supply arms, namely the first power supply arm and the second power supply arm, and the two power supply arms work independently.

[0056] In an embodiment of the present invention, a measurement system can be set up in the contact network where the first power supply arm is located. The measurement system can be used to measure the voltage information and current information of the first power supply arm. The measurement system may include a voltmeter and an ammeter. All devices for measuring voltage information and current information can be set in the measurement system. The specific device used to measure the voltage information and current information is not limited here.

[0057] In an embodiment of the present invention, the voltage information and current information measured by the above-mentioned measurement system can be collected, and the first real-time power corresponding to the first power supply arm can be calculated based on the voltage information and the current information. Because the voltage information and the current information measured by the measurement system both include direction information, the first real-time power also includes direction information. The direction of the first real-time power can be determined by comparing the first real-time power and zero. When the first real-time power is greater than zero, the direction of the first real-time power is positive, indicating that the first power supply arm provides electrical energy to the outside; when the first real-time power is not greater than zero, the direction of the first real-time power is negative, indicating that the first power supply arm receives external feedback electrical energy.

[0058] In step S102, current information and voltage information of the second power supply arm of the traction substation are collected, and the real-time power of the second power supply arm is calculated according to the current information and the voltage information to obtain the second real-time power.

[0059] In an embodiment of the present invention, a measurement system can be set up in the contact network where the second power supply arm is located. The measurement system can be used to measure the voltage information and current information of the second power supply arm. The measurement system may include a voltmeter and an ammeter. All devices for measuring voltage information and current information can be set in the measurement system. The specific device used to measure the voltage information and current information is not limited here.

[0060] It should be understood that the measurement system of the contact network where the first power supply arm is located and the measurement system of the contact network where the second power supply arm is located have the same structure, but are located in different positions.

[0061] In an embodiment of the present invention, the voltage information and current information measured by the above-mentioned measurement system can be collected, and the second real-time power corresponding to the second power supply arm can be calculated based on the voltage information and current information. Because the voltage information and current information measured by the measurement system both contain direction information, the second real-time power also contains direction information. The direction of the second real-time power can be determined by comparing the second real-time power and zero. When the second real-time power is greater than zero, the direction of the second real-time power is positive, indicating that the second power supply arm provides electrical energy to the outside; when the second real-time power is not greater than zero, the direction of the second real-time power is negative, indicating that the second power supply arm receives external feedback electrical energy.

[0062] In step S103, an energy transfer instruction is generated according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy.

[0063] In an embodiment of the present invention, the first power supply arm can transmit electric energy to an electric locomotive connected to the first power supply arm, and the electric locomotive can also feed back the regenerative braking energy generated by it to the first power supply arm; the second power supply arm can transmit electric energy to an electric locomotive connected to the second power supply arm, and the electric locomotive can also feed back the regenerative braking energy generated by it to the second power supply arm; the energy transfer instruction can control the regenerative braking energy fed back to the first power supply arm, and can also control the regenerative braking energy fed back to the second power supply arm.

[0064] Optionally, in one embodiment, generating the energy transfer instruction according to the first real-time power and the second real-time power in the above step S103 may include:

[0065] The train operating state corresponding to the first power supply arm is determined according to the first real-time power to obtain the first operating state.

[0066] As mentioned above, the first real-time power contains direction information, and based on the direction information, it can be determined whether the first power supply arm provides power to the outside or receives external feedback power. In addition, the operating state of the train connected to the first power supply arm can also be judged based on the direction information of the first real-time power, which is called the first operating state.

[0067] The train operating state corresponding to the second power supply arm is determined according to the second real-time power to obtain the second operating state.

[0068] As mentioned above, the second real-time power contains direction information, and based on the direction information, it can be determined whether the second power supply arm provides power to the outside or receives external feedback power. In addition, the operating status of the train connected to the second power supply arm can also be judged based on the direction information of the second real-time power, which is called the second operating status.

[0069] An energy transfer command is generated based on the first operating state and the second operating state.

[0070] Optionally, in one embodiment, the determining the train running state corresponding to the first power supply arm according to the first real-time power, obtaining the first running state includes:

[0071] If the first real-time power is greater than zero, the first operating state is the traction state.

[0072] If the first real-time power is not greater than zero, the first operating state is a braking state.

[0073] As mentioned above, the direction of the first real-time power can be determined by comparing the first real-time power with zero. When the first real-time power is greater than zero, the direction of the first real-time power is positive, indicating that the first power supply arm provides electrical energy to the outside; when the first real-time power is not greater than zero, the direction of the first real-time power is negative, indicating that the first power supply arm receives external feedback electrical energy. In an embodiment of the present invention, the operating status of the train connected to the first power supply arm can also be determined by comparing the first real-time power with zero.

[0074] In a specific embodiment, when the first real-time power is greater than zero, the first power supply arm transmits electric energy to the train connected to the first power supply arm, indicating that the train is in a traction state at this time; when the first real-time power is not greater than zero, the train connected to the first power supply arm feeds back electric energy to the first power supply arm, indicating that the train is in a braking state at this time.

[0075] Optionally, in one embodiment, determining the train running state corresponding to the second power supply arm according to the second real-time power, and obtaining the second running state includes:

[0076] If the second real-time power is greater than zero, the second operating state is the traction state;

[0077] If the second real-time power is not greater than zero, the second operating state is a braking state.

[0078] As mentioned above, the direction of the second real-time power can be determined by comparing the second real-time power with zero. When the second real-time power is greater than zero, the direction of the second real-time power is positive, indicating that the second power supply arm provides electrical energy to the outside; when the second real-time power is not greater than zero, the direction of the second real-time power is negative, indicating that the first power supply arm receives external feedback electrical energy. In an embodiment of the present invention, the operating status of the train connected to the second power supply arm can also be determined by comparing the second real-time power with zero.

[0079] In a specific embodiment, when the second real-time power is greater than zero, the second power supply arm transmits electric energy to the train connected to the second power supply arm, indicating that the train is in a traction state at this time; when the second real-time power is not greater than zero, the train connected to the second power supply arm feeds back electric energy to the second power supply arm, indicating that the train is in a braking state at this time.

[0080] Optionally, in one embodiment, generating the energy transfer instruction according to the first operating state and the second operating state includes:

[0081] If the first operating state is a braking state and the second operating state is a traction state, the first braking energy generated by the train in the braking state and the first traction energy required by the train in the traction state are respectively acquired.

[0082] A first energy transfer command is generated based on the first braking energy and the first traction energy.

[0083] or,

[0084] If the first operating state is a traction state and the second operating state is a braking state, the second traction energy required by the train in the traction state and the second braking energy generated by the train in the braking state are respectively obtained.

[0085] A second energy transfer command is generated based on the second traction energy and the second braking energy.

[0086] It can be understood that when the train is in a traction state, the traction substation needs to provide energy to it through the power supply arm, which we call traction energy, such as the first traction energy and the second traction energy in this application; when the train is in a braking state, the train will feed back energy to the traction substation through the power supply arm, which we call braking energy, such as the first braking energy and the second braking energy in this application.

[0087] In an embodiment of the present invention, the train connected to the first power supply arm may be in a traction state or a braking state; the train connected to the second power supply arm may be in a traction state or a braking state, so different energy transfer instructions need to be generated according to the states of the trains connected to the two power supply arms, such as the first energy transfer instruction and the second energy transfer instruction in this application.

[0088] Optionally, in one embodiment, the first energy transfer instruction is used to:

[0089] If the first braking energy is not greater than the first traction energy, the first braking energy is transferred to the second power supply arm.

[0090] If the first braking energy is greater than the first traction energy, the first braking energy is divided into first transfer energy and first storage energy, and the first transfer energy is transferred to the second power supply arm, and the first storage energy is stored in the first energy storage system.

[0091] If the first stored energy in the first energy storage system is higher than a preset threshold, the first stored energy is stored in the second energy storage system.

[0092] The first transfer energy is equal to the first traction energy.

[0093] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0094] In a specific embodiment, this embodiment corresponds to the above-mentioned situation where the first operating state is a braking state and the second operating state is a traction state. In the embodiment of the present invention, the first braking energy generated by the train in the braking state connected to the first power supply arm can be sent to the second power supply arm to provide electric energy for the train in the traction state connected to the second power supply arm. When the traction energy required by the train in the traction state connected to the second power supply arm is greater than the braking energy generated by the train in the braking state connected to the first power supply arm, it means that the train in the traction state needs to obtain a certain amount of electric energy from the traction substation in addition to the braking energy generated by the train in the braking state.

[0095] In an embodiment of the present invention, the first braking energy can be first stored in the first energy storage system. When the first traction energy is not greater than the first braking energy, a portion of the first braking energy can be sent to the second power supply arm to provide electrical energy for the train in the traction state connected to the second power supply arm, such as the first transfer energy in the present application, and the first transfer energy should be the same as the first traction energy required by the train in the traction state; a portion of the first braking energy can be stored in the first energy storage system connected to the first power supply arm, such as the first stored energy in the present application.

[0096] In an embodiment of the present invention, the first energy storage system and the second energy storage system may be composed of a transformer, a PCS, a BMS, a battery pack or a control circuit breaker. The transformer may boost the braking energy stored in the energy storage system to ensure that the electric energy sent to the traction substation is consistent with the electric energy provided by the traction substation, and may also reduce the braking energy generated by the train to ensure that it can be stored in the energy storage system.

[0097] In an embodiment of the present invention, the PCS in the first energy storage system can be controlled according to the generated first energy transfer instruction to control it to transfer energy to the second power supply arm or store the energy generated by the train in a braking state; in an embodiment of the present invention, the first energy storage system has a preset energy threshold. If the braking energy stored in the first energy storage system is greater than the preset energy threshold, the first energy transfer instruction can control the PCS in the second energy storage system to control it to store the braking energy that cannot be stored in the first energy storage system.

[0098] Optionally, in one embodiment, the second energy transfer instruction is used to:

[0099] If the second braking energy is not greater than the second traction energy, transferring the second braking energy to the first power supply arm;

[0100] If the second braking energy is greater than the second traction energy, the second braking energy is divided into second transfer energy and second storage energy, and the second transfer energy is transferred to the first power supply arm, and the second storage energy is stored in the second energy storage system;

[0101] If the second stored energy in the second energy storage system is higher than a preset threshold, the second stored energy is stored in the first energy storage system;

[0102] wherein the second transfer energy is equal to the second pulling energy;

[0103] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0104] In a specific embodiment, this embodiment corresponds to the above-mentioned situation where the first operating state is the traction state and the second operating state is the braking state. In the embodiment of the present invention, the second braking energy generated by the train in the braking state connected to the second power supply arm can be sent to the first power supply arm to provide electric energy for the train in the traction state connected to the first power supply arm. When the traction energy required by the train in the traction state connected to the first power supply arm is greater than the braking energy generated by the train in the braking state connected to the second power supply arm, it means that the train in the traction state needs to obtain a certain amount of electric energy from the traction substation in addition to the braking energy generated by the train in the braking state.

[0105] In an embodiment of the present invention, the second braking energy can be first stored in the second energy storage system. When the second traction energy is not greater than the second braking energy, a portion of the second braking energy can be sent to the first power supply arm to provide electrical energy for the train in the traction state connected to the first power supply arm, such as the second transfer energy in the present application, and the second transfer energy should be the same as the second traction energy required by the train in the traction state; a portion of the second braking energy can be stored in the second energy storage system connected to the second power supply arm, such as the second stored energy in the present application.

[0106] In an embodiment of the present invention, the PCS in the second energy storage system can be controlled according to the generated second energy transfer instruction to control it to transfer energy to the first power supply arm or store the energy generated by the train in a braking state; in an embodiment of the present invention, the second energy storage system also has a preset energy threshold. If the braking energy stored in the second energy storage system is greater than the preset energy threshold, the second energy transfer instruction can also control the PCS in the first energy storage system to control it to store the braking energy that cannot be stored in the second energy storage system.

[0107] In a specific embodiment, if the train in the traction state connected to the first power supply arm in this embodiment is transformed into the running state by the train in the braking state connected to the first power supply arm in the above embodiment, then the train in the traction state in this embodiment can first obtain braking energy from the first energy storage system to maintain operation; if the energy in the first energy storage system is not enough to keep it running, then obtain the energy stored in the second energy storage system to maintain operation; if the above energy cannot keep it running, then execute the steps in the above embodiment, that is, obtain the energy generated by the train in the braking state connected to the second power supply arm to provide electrical energy for the operation of the train in the traction state, and the remaining energy is first stored in the second energy storage system. If the energy in the second energy storage system is higher than the preset energy threshold, the energy is stored in the first energy storage system.

[0108] As can be seen from the above, the present invention collects the current information and voltage information of the first power supply arm of the traction substation on the one hand, and calculates the real-time power of the first power supply arm according to the current information and voltage information to obtain the first real-time power; on the other hand, it collects the current information and voltage information of the second power supply arm of the traction substation, and calculates the real-time power of the second power supply arm according to the current information and voltage information to obtain the second real-time power; finally, an energy transfer instruction is generated according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy. Since the regenerative braking energy generated on the first power supply arm and the second power supply arm is uniformly controlled and transferred through the energy transfer instruction, the present invention can realize energy regulation between the two power supply arms and improve the utilization rate of regenerative braking energy.

[0109] Secondly, the regenerative braking energy generated by the present invention can be timely utilized or transferred through energy transfer instructions, so to a certain extent, it avoids the regenerative braking energy generated by the train from being fed back to the superior power system, thereby reducing the problem of power quality deterioration of the power system.

[0110] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0111] The following is an embodiment of the device of the present invention. For details not described in detail therein, reference may be made to the corresponding method embodiment described above.

[0112] Figure 2 The schematic diagram of the structure of the large energy regenerative braking energy storage control device for an electrified railway train provided by an embodiment of the present invention is shown. For the convenience of explanation, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0113] like Figure 2As shown, the large-energy regenerative braking energy storage control device 2 of the electrified railway train includes: a first acquisition unit 201, a second acquisition unit 202, and a control unit 203.

[0114] The first acquisition unit 201 is used to collect current information and voltage information of the first power supply arm of the traction substation, and calculate the real-time power of the first power supply arm according to the current information and the voltage information to obtain the first real-time power.

[0115] The second acquisition unit 202 is used to collect current information and voltage information of the second power supply arm of the traction substation, and calculate the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power.

[0116] The control unit 203 is used to generate an energy transfer instruction according to the first real-time power and the second real-time power, and the energy transfer instruction is used to control the regenerative braking energy.

[0117] In one possible implementation, Figure 3 As shown, the control unit 203 includes:

[0118] A first operating state acquisition subunit 301 is used to determine the train operating state corresponding to the first power supply arm according to the first real-time power, and obtain the first operating state;

[0119] The second operation state acquisition subunit 302 is used to determine the train operation state corresponding to the second power supply arm according to the second real-time power, and obtain the second operation state;

[0120] The transfer instruction generating subunit 303 generates an energy transfer instruction according to the first operating state and the second operating state.

[0121] In a possible implementation, the first operation status obtaining subunit 301 is specifically configured to perform the following steps:

[0122] If the first real-time power is greater than zero, the first operating state is a traction state;

[0123] If the first real-time power is not greater than zero, the first operating state is a braking state.

[0124] In a possible implementation, the second operation status obtaining subunit 302 is specifically configured to perform the following steps:

[0125] If the second real-time power is greater than zero, the second operating state is the traction state;

[0126] If the second real-time power is not greater than zero, the second operating state is a braking state.

[0127] In a possible implementation, the transfer instruction generating subunit 303 is specifically configured to perform the following steps:

[0128] If the first operating state is a braking state and the second operating state is a traction state, first braking energy generated by the train in the braking state and first traction energy required by the train in the traction state are respectively obtained;

[0129] generating a first energy transfer instruction according to the first braking energy and the first traction energy;

[0130] or,

[0131] If the first operating state is a traction state and the second operating state is a braking state, a second traction energy required by the train in the traction state and a second braking energy generated by the train in the braking state are respectively obtained;

[0132] A second energy transfer command is generated based on the second traction energy and the second braking energy.

[0133] In a possible implementation, the first energy transfer instruction is used to:

[0134] If the first braking energy is not greater than the first traction energy, transferring the first braking energy to the second power supply arm;

[0135] If the first braking energy is greater than the first traction energy, the first braking energy is divided into first transfer energy and first storage energy, and the first transfer energy is transferred to the second power supply arm, and the first storage energy is stored in the first energy storage system;

[0136] If the first stored energy in the first energy storage system is higher than a preset threshold, the first stored energy is stored in the second energy storage system;

[0137] wherein the first transfer energy is equal to the first traction energy;

[0138] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0139] In a possible implementation, the second energy transfer instruction is used to:

[0140] If the second braking energy is not greater than the second traction energy, transferring the second braking energy to the first power supply arm;

[0141] If the second braking energy is greater than the second traction energy, the second braking energy is divided into second transfer energy and second storage energy, and the second transfer energy is transferred to the first power supply arm, and the second storage energy is stored in the second energy storage system;

[0142] If the second stored energy in the second energy storage system is higher than a preset threshold, the second stored energy is stored in the first energy storage system;

[0143] wherein the second transfer energy is equal to the second pulling energy;

[0144] The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

[0145] Figure 4 is a schematic diagram of a terminal provided by an embodiment of the present invention. Figure 4 As shown, the terminal 4 of this embodiment includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, the steps in the above-mentioned large energy regenerative braking energy storage control method embodiments of the electrified railway train are implemented, such as Figure 1 Alternatively, when the processor 40 executes the computer program 42, the functions of each unit in the above-mentioned device embodiments are realized, for example Figure 2 The functions of the units 201 to 203 are shown.

[0146] Exemplarily, the computer program 42 may be divided into one or more units, which are stored in the memory 41 and executed by the processor 40 to implement the present invention. The one or more units may be a series of computer program instruction segments capable of implementing specific functions, which are used to describe the execution process of the computer program 42 in the terminal 4. For example, the computer program 42 may be divided into Figure 2 The first acquisition unit, the second acquisition unit, and the control unit are shown.

[0147] The terminal 4 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will appreciate that Figure 4 It is only an example of terminal 4 and does not constitute a limitation on terminal 4. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0148] The processor 40 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0149] The memory 41 may be an internal storage unit of the terminal 4, such as a hard disk or memory of the terminal 4. The memory 41 may also be an external storage device of the terminal 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal 4. The memory 41 is used to store the computer program and other programs and data required by the terminal. The memory 41 may also be used to temporarily store data that has been output or is to be output.

[0150] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0151] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0152] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0153] In the embodiments provided by the present invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0154] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0155] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0156] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned embodiments of the large-energy regenerative braking energy storage control method for each electrified railway train can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0157] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A high-energy regenerative braking energy storage control method for an electrified railway train, characterized in that: include: Collecting current information and voltage information of the first power supply arm of the traction substation, and calculating the real-time power of the first power supply arm according to the current information and the voltage information to obtain the first real-time power; Collecting current information and voltage information of the second power supply arm of the traction substation, and calculating the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power; Determine the train running state corresponding to the first power supply arm according to the first real-time power, and obtain a first running state; Determine the train operation state corresponding to the second power supply arm according to the second real-time power, and obtain the second operation state; generate an energy transfer instruction according to the first operation state and the second operation state, and the energy transfer instruction is used to control the regenerative braking energy; If the train in traction state connected to the first power supply arm is transformed into the running state by the train in braking state connected to the first power supply arm, energy is first obtained from the first energy storage system to maintain the operation; if the energy in the first energy storage system is not enough to keep it running, the energy stored in the second energy storage system is obtained to maintain the operation; if the energy in the second energy storage system is not enough to keep it running, the energy generated by the train in braking state connected to the second power supply arm is obtained to provide electric energy for the operation of the train in traction state; Among them, the first energy storage system is the energy storage system corresponding to the first power supply arm, and the second energy storage system is the energy storage system corresponding to the second power supply arm; the first energy storage system and the second energy storage system are both composed of a transformer, a PCS, a BMS, a battery pack or a control circuit breaker.

2. The high-energy regenerative braking energy storage control method for an electrified railway train according to claim 1 is characterized in that: The determining, according to the first real-time power, a train running state corresponding to the first power supply arm to obtain a first running state includes: If the first real-time power is greater than zero, the first operating state is a traction state; If the first real-time power is not greater than zero, the first operating state is a braking state.

3. The high-energy regenerative braking energy storage control method for an electrified railway train according to claim 1 is characterized in that: The determining the train running state corresponding to the second power supply arm according to the second real-time power to obtain the second running state includes: If the second real-time power is greater than zero, the second operating state is a traction state; If the second real-time power is not greater than zero, the second operating state is a braking state.

4. The high-energy regenerative braking energy storage control method for an electrified railway train according to any one of claims 1 to 3, characterized in that: The generating the energy transfer instruction according to the first operating state and the second operating state comprises: If the first operating state is a braking state and the second operating state is a traction state, respectively obtaining a first braking energy generated by the train in the braking state and a first traction energy required by the train in the traction state; generating a first energy transfer instruction according to the first braking energy and the first traction energy; or, If the first operating state is a traction state and the second operating state is a braking state, respectively obtaining a second traction energy required by the train in the traction state and a second braking energy generated by the train in the braking state; A second energy transfer command is generated based on the second traction energy and the second braking energy.

5. The high-energy regenerative braking energy storage control method for an electrified railway train according to claim 4 is characterized in that: The first energy transfer instruction is used to: If the first braking energy is not greater than the first traction energy, transferring the first braking energy to the second power supply arm; If the first braking energy is greater than the first traction energy, dividing the first braking energy into first transfer energy and first storage energy, transferring the first transfer energy to the second power supply arm, and storing the first storage energy in the first energy storage system; If the first stored energy in the first energy storage system is higher than a preset threshold, storing the first stored energy in the second energy storage system; wherein the first transfer energy is equal to the first traction energy; The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

6. The high-energy regenerative braking energy storage control method for an electrified railway train according to claim 4, characterized in that: The second energy transfer instruction is used to: If the second braking energy is not greater than the second traction energy, transferring the second braking energy to the first power supply arm; If the second braking energy is greater than the second traction energy, dividing the second braking energy into second transfer energy and second storage energy, transferring the second transfer energy to the first power supply arm, and storing the second storage energy in the second energy storage system; If the second stored energy in the second energy storage system is higher than a preset threshold, storing the second stored energy in the first energy storage system; wherein the second transfer energy is equal to the second traction energy; The first energy storage system is an energy storage system corresponding to the first power supply arm, and the second energy storage system is an energy storage system corresponding to the second power supply arm.

7. A high-energy regenerative braking energy storage control device for an electrified railway train, characterized in that: include: A first acquisition unit is used to collect current information and voltage information of a first power supply arm of a traction substation, and calculate the real-time power of the first power supply arm according to the current information and the voltage information to obtain a first real-time power; The second acquisition unit is used to collect current information and voltage information of the second power supply arm of the traction substation, and calculate the real-time power of the second power supply arm according to the current information and the voltage information to obtain the second real-time power; A control unit, configured to determine a train running state corresponding to a first power supply arm according to the first real-time power, and obtain a first running state; Determine the train operation state corresponding to the second power supply arm according to the second real-time power, and obtain the second operation state; generate an energy transfer instruction according to the first operation state and the second operation state, and the energy transfer instruction is used to control the regenerative braking energy; If the train in traction state connected to the first power supply arm is transformed into the running state by the train in braking state connected to the first power supply arm, energy is first obtained from the first energy storage system to maintain the operation; if the energy in the first energy storage system is not enough to keep it running, the energy stored in the second energy storage system is obtained to maintain the operation; if the energy in the second energy storage system is not enough to keep it running, the energy generated by the train in braking state connected to the second power supply arm is obtained to provide electric energy for the operation of the train in traction state; Among them, the first energy storage system is the energy storage system corresponding to the first power supply arm, and the second energy storage system is the energy storage system corresponding to the second power supply arm; the first energy storage system and the second energy storage system are both composed of a transformer, a PCS, a BMS, a battery pack or a control circuit breaker.

8. A terminal comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the large-energy regenerative braking energy storage control method for an electrified railway train as described in any one of claims 1 to 6 above are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the large-energy regenerative braking energy storage control method for an electrified railway train as described in any one of claims 1 to 6 above are implemented.

Images