Control method for hybrid power locomotive, and related assembly

Abstract

A control method for a hybrid power locomotive, and a related assembly, relating to the field of locomotive power supply. A second voltage outputted by a controllable rectifier module is adjusted by means of a first voltage of an output end of the rectifier module, namely, a voltage inputted by a diesel engine power supply module to an intermediate direct-current circuit is adjusted, that is, a voltage difference between the voltages generated by two power sources, i.e., an overhead contact line and a diesel engine, is eliminated, so that the two power sources can simultaneously supply power for the hybrid power locomotive. Moreover, a connection mode of the diesel engine power supply module and the intermediate direct-current circuit is controlled by means of the connection / disconnection between an input end of a controllable switch module and a first output end, and the connection / disconnection between the input end and a second output end, namely, a connection relationship between the diesel engine power supply module and the assistance load and traction system of the hybrid power locomotive is controlled, that is, power source switching is controlled by controlling the controllable switch module, so that during power source switching, power supply is not stopped, and seamless switching can be realized.

Description

A control method for a hybrid locomotive and related components

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on June 29, 2023, with application number 2023107857147 and invention name “A control method and related components of a hybrid locomotive”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the field of locomotive power supply, and in particular to a control method and related components of a hybrid power locomotive. Background Art

[0003] With the development of China's machinery industry, the field of power locomotives has also made rapid progress, and hybrid locomotives have now emerged. A hybrid locomotive refers to a locomotive with different power sources. Common hybrid locomotives generally use a dual-power supply system consisting of a catenary and a diesel engine. The parts of the hybrid locomotive that require power supply include the traction system for traction braking and the auxiliary system consisting of auxiliary loads such as air conditioning modules and lighting modules. Please refer to Figure 1, which is a schematic diagram of the structure of the power supply system of a common hybrid locomotive: the dual power source is connected to the auxiliary load 105 and the traction inverter 106 respectively after passing through the rectifier module 103 and the intermediate DC circuit 104. That is, the voltage provided by the dual power source can directly power the auxiliary load after being rectified by the rectifier module and filtered by the intermediate DC circuit. However, when powering the traction system, it also needs to pass through the traction inverter before being supplied to the traction motor 107.

[0004] In existing technology, due to the voltage difference between the catenary and the diesel engine, to prevent short circuits and other power source burnouts when both power sources are simultaneously supplying power to the hybrid locomotive, both power sources operate independently. This means that only one power source can power the hybrid locomotive at a time. When the grid is operating normally, the pantograph on the hybrid locomotive is raised, and the hybrid locomotive receives current from the catenary through the pantograph to power the hybrid locomotive. When the grid is down or the hybrid locomotive is passing through a non-electrified section, the pantograph on the hybrid locomotive is lowered, and the diesel engine, after being preheated by the preheating module, burns fuel to generate electricity to power the hybrid locomotive. With this control method, when the power supply mode switches between the two power sources, the hybrid locomotive temporarily loses power. This means that the traction system and auxiliary loads temporarily lose power and cease operation. Power can only be restored and operation can resume after the power source switch is complete, affecting the passenger experience.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a control method and related components for a hybrid locomotive, which eliminates the voltage difference between the voltages generated by the two power sources, the catenary and the diesel engine, so that the two power sources can simultaneously supply power to the hybrid locomotive. The power source switching is controlled by controlling the controllable switch module. During the power source switching process, there will be no power loss, and seamless switching can be achieved.

[0007] To solve the above technical problems, the present invention provides a control method for a hybrid locomotive, which is applied to a processor of a power supply system of a hybrid locomotive. The power supply system also includes a controllable switch module and a controllable rectifier module. The input end of the controllable switch module is connected to the diesel engine power supply module, the first output end of the controllable switch module is respectively connected to the contact network power supply module and the input end of the rectifier module, the second output end of the controllable switch module is connected to the input end of the controllable rectifier module, and the output end of the controllable rectifier module is respectively connected to the output end of the rectifier module and the input end of the intermediate DC circuit. The control method includes:

[0008] When receiving a power source switching instruction, controlling the conduction between the input end and the second output end of the controllable switch module to connect the diesel engine power supply module to the input end of the controllable rectifier module;

[0009] adjusting a second voltage output by the controllable rectifier module according to a first voltage at an output end of the rectifier module so that a voltage difference between the first voltage and the second voltage is within a preset rated safety voltage difference range;

[0010] When the switching power source meets the preset power supply conditions, the connection between the initial power source of the hybrid locomotive and the hybrid locomotive is disconnected, the initial power source is the power source of the hybrid locomotive before receiving the power source switching instruction, and the switching power source is a power source in the dual power sources that is different from the initial power source.

[0011] On the one hand, before controlling the conduction between the input terminal and the second output terminal of the controllable switch module, the method further includes:

[0012] Determining whether the initial power source is the contact network power supply module;

[0013] If not, the pantograph in the contact network power supply module is controlled to rise, so that the hybrid locomotive receives current from the contact network in the contact network power supply module through the pantograph.

[0014] On the one hand, determining whether the initial power source is the contact network power supply module includes:

[0015] Determining whether the pantograph is connected to the contact network;

[0016] If yes, determining that the initial power source is the contact network power supply module;

[0017] If not, it is determined that the initial power source is not the contact network power supply module.

[0018] On the one hand, the switching power source meets the preset power supply conditions, including:

[0019] Determining whether the output voltages of the switching power sources are all equal to a preset supply voltage;

[0020] If so, it is determined that the switching power source meets the preset power supply condition.

[0021] On the one hand, when the initial power source is the overhead power supply module, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive includes:

[0022] Controlling the pantograph in the overhead power supply module to descend;

[0023] Controlling conduction between the input terminal and the first output terminal of the controllable switch module.

[0024] On the other hand, when the initial power source is the diesel engine power supply module, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive includes:

[0025] Controlling the disconnection between the input terminal and the second output terminal of the controllable switch module;

[0026] Before controlling the conduction between the input terminal and the second output terminal of the controllable switch module, the method further includes:

[0027] The input terminal and the first output terminal of the controllable switch module are controlled to be disconnected.

[0028] On the one hand, the controllable switch module includes:

[0029] A switching switch, wherein the first static contact of the switching switch is respectively connected to the second static contact of the switching switch and the diesel engine power supply module, the first moving contact of the switching switch is respectively connected to the contact network power supply module and the input end of the rectifier module, and the second moving contact of the controllable switch module is connected to the input end of the controllable rectifier module.

[0030] On the one hand, the diesel engine power supply module also includes:

[0031] A preheating module, the power supply end of the preheating module is connected to the contact network power supply module, and is used to preheat the diesel engine in the diesel engine power supply module through the contact network power supply module before receiving a power source switching instruction when the initial power source is in the contact network power supply module.

[0032] The present invention also provides a power supply system for a hybrid locomotive, which is applied to a hybrid locomotive and includes:

[0033] a processor connected to the control terminal of the controllable switch module and configured to execute the steps of the hybrid locomotive control method as described above;

[0034] The controllable switch module, the input end of the controllable switch module is connected to the diesel engine power supply module, the first output end of the controllable switch module is connected to the input end of the contact network power supply module and the rectifier module respectively, and the second output end of the controllable switch module is connected to the input end of the controllable rectifier module;

[0035] The diesel engine power supply module;

[0036] The contact network power supply module;

[0037] The controllable rectifier module, the output end of the controllable rectifier module is respectively connected to the output end of the rectifier module and the input end of the intermediate DC circuit;

[0038] The rectifier module;

[0039] The intermediate DC circuit.

[0040] The present invention also provides a computer-readable storage medium, wherein a computer program is stored on the target computer-readable storage medium. When the target computer program is executed by a processor, the steps of the method for starting the encrypted hard disk as described above are implemented.

[0041] The present invention provides a control method and related components for a hybrid locomotive. The second voltage output by a controllable rectifier module is adjusted through a rectifier module, that is, the voltage input to the intermediate DC circuit by the diesel engine power supply module is adjusted, that is, the voltage difference between the voltages generated by the two power sources, the contact network and the diesel engine, is eliminated, so that the two power sources can simultaneously power the hybrid locomotive; at the same time, by connecting and disconnecting the input end and the first output end and the second output end of the controllable switch module, the connection mode of the diesel engine power supply module and the intermediate DC circuit is controlled, that is, the connection relationship between the diesel engine power supply module and the auxiliary load and traction system of the hybrid locomotive is controlled, that is, the power source switching is controlled by controlling the controllable switch module. During the power source switching process, power supply will not be lost, and seamless switching can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. 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 any creative work.

[0043] FIG1 is a schematic diagram of the structure of a common hybrid locomotive power supply system;

[0044] FIG2 is a flow chart of a control method for a hybrid locomotive provided by an embodiment of the present invention;

[0045] FIG3 is a schematic structural diagram of a power supply system for a hybrid locomotive provided by an embodiment of the present invention;

[0046] FIG4 is a schematic structural diagram of another power supply system for a hybrid locomotive provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The core of the present invention is to provide a control method and related components for a hybrid locomotive, which eliminates the voltage difference between the voltages generated by the two power sources, the catenary and the diesel engine, so that the two power sources can simultaneously power the hybrid locomotive. The power source switching is controlled by controlling the controllable switch module. During the power source switching process, there will be no power loss, and seamless switching can be achieved.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0049] Please refer to FIG2 , which is a flow chart of a control method for a hybrid locomotive provided by an embodiment of the present invention. Please refer to FIG3 , which is a schematic structural diagram of a power supply system for a hybrid locomotive provided by an embodiment of the present invention. The power supply system further includes a controllable switch module 201 and a controllable rectifier module 202. The input end of the controllable switch module 201 is connected to the diesel engine power supply module 102. The first output end of the controllable switch module 201 is respectively connected to the input end of the contact network power supply module 101 and the input end of the rectifier module 103. The second output end of the controllable switch module 201 is connected to the input end of the controllable rectifier module 202. The output end of the controllable rectifier module 202 is respectively connected to the output end of the rectifier module 103 and the input end of the intermediate DC circuit 104. The control method includes:

[0050] S21: When a power source switching instruction is received, the input terminal and the second output terminal of the controllable switch module 201 are controlled to be conductive, so that the diesel engine power supply module 102 is connected to the input terminal of the controllable rectifier module 202;

[0051] S22: adjusting the second voltage output by the controllable rectifier module 202 according to the first voltage at the output end of the rectifier module 103 so that the voltage difference between the first voltage and the second voltage is within a preset rated safety voltage difference range;

[0052] S23: When the switching power source meets the preset power supply conditions, disconnect the initial power source of the hybrid locomotive from the hybrid locomotive, the initial power source being the power source of the hybrid locomotive before receiving the power source switching instruction, and the switching power source being a power source in the dual power sources different from the initial power source.

[0053] In a specific embodiment, when the hybrid locomotive needs to switch from diesel engine power supply to catenary power supply, or from catenary power supply to diesel engine power supply, a power source switching instruction is sent to the processor of the power supply system of the hybrid locomotive. At this time, the controllable switch module 201 is controlled to change its state, so that the diesel engine power supply module 102 is connected to the input end of the controllable rectifier module 202 through the input end and the second output end of the controllable switch module 201; when the controllable rectifier module 202 receives the input voltage, the controllable rectifier module 202 adjusts its own output second voltage according to the first voltage of the output end of the rectifier module 103, that is, through the controllable rectifier module 202, so that the voltage provided by the diesel engine power supply module 102 and the contact network power supply module 101 to the hybrid locomotive is within a preset rated safe voltage difference range, wherein the preset rated safe voltage difference range refers to the voltage difference when the contact network and the diesel engine simultaneously supply power to the hybrid locomotive without short circuit causing power source burnout and other fault problems; when both power sources can stably provide electric energy to the hybrid locomotive, the connection between the initial power source of the hybrid locomotive and the hybrid locomotive is disconnected, that is, the hybrid locomotive is no longer powered by the initial power source, and the hybrid locomotive is powered by the switching power source instead, that is, the power source switching operation is completed.

[0054] Furthermore, when the initial power source is the contact network power supply module 101, the method for disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive may be to control the pantograph to be lowered, or to control the circuit breaker in the contact network power supply module 101 to be disconnected; when the initial power source is the diesel engine power supply module 102, the method for disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive may be to control the diesel engine to stop working, or to control the disconnection between the input end and the second output end of the controllable switch module 201, that is, to disconnect the connection between the diesel engine power supply module 102 and the rectifier module 103 through the controllable switch module 201, that is, to disconnect the connection between the diesel engine power supply module 102 and the auxiliary load 105 and the traction inverter 106.

[0055] It should be noted that the specific method for switching the power source to meet the preset power supply conditions can be to judge through voltage, or it can be that after the running time of the switching power source reaches a preset time length, it is considered that the preset power supply conditions are met. Of course, other judgment methods can also be used. This embodiment does not make specific limitations, as long as the status of the switching power source can be determined.

[0056] This embodiment does not limit the specific structure of the controllable switch module 201. For example, it can be two contactors controlled by a processor, the first end of the first contactor is respectively connected to the first end of the second contactor and the diesel engine power supply module 102, the second end of the first contactor is respectively connected to the contact network power supply module 101 and the input end of the rectifier module 103, and the second end of the second contactor is connected to the input end of the controllable rectifier module 202. Or it can be a transfer switch, the first static contact of the transfer switch is respectively connected to the second static contact of the transfer switch and the diesel engine power supply module 102, the first moving contact of the transfer switch is respectively connected to the input end of the contact network power supply module 101 and the rectifier module 103, and the second moving contact of the controllable switch module 201 is connected to the input end of the controllable rectifier module 202. Or it can be other structures, as long as it can realize the change of the connection relationship between the diesel engine power supply module 102, the controlled rectifier module 202 and the rectifier module 103 under the control of the processor, and can be selected by technicians in this field according to actual conditions.

[0057] It should be noted that, in some embodiments, the controllable rectifier module 202 includes a controllable rectifier, and the power of the controllable rectifier is equivalent to the power of the auxiliary load 105, that is, the controllable rectifier is only equivalent to a small load of the power source and will not cause major disturbances to the entire power supply system.

[0058] The present invention provides a control method and related components for a hybrid locomotive. The rectifier module 103 regulates the second voltage output by the controllable rectifier module 202, i.e., regulates the voltage input to the intermediate DC circuit 104 by the diesel engine power supply module 102. This eliminates the voltage difference between the voltages generated by the contact network and the diesel engine, allowing the two power sources to simultaneously power the hybrid locomotive. Simultaneously, by connecting and disconnecting the input terminal of the controllable switch module 201 and the first and second output terminals, the connection mode between the diesel engine power supply module 102 and the intermediate DC circuit 104 is controlled. This controls the connection relationship between the diesel engine power supply module 102 and the auxiliary load 105 and traction system of the hybrid locomotive. Furthermore, by controlling the controllable switch module 201, power source switching is controlled. During the power source switching process, power supply is not lost, enabling seamless switching.

[0059] Based on the above embodiment:

[0060] In some embodiments, before controlling the conduction between the input terminal and the second output terminal of the controllable switch module 201, the method further includes:

[0061] Determine whether the initial power source is the contact network power supply module 101;

[0062] If not, the pantograph in the contact network power supply module 101 is controlled to rise, so that the hybrid locomotive receives current from the contact network in the contact network power supply module 101 through the pantograph.

[0063] In a specific embodiment, when controlling the power source to switch according to the power source switching instruction, the type of the initial power source must also be determined. On the one hand, when the initial power source of the hybrid locomotive is the catenary power supply module 101, after receiving the power source switching instruction, the diesel engine in the diesel engine power supply module 102 must be controlled to start, that is, the diesel engine power supply module 102 must be controlled to start providing electrical energy. When the initial power source of the hybrid locomotive is the diesel engine power supply module 102, the pantograph in the catenary power supply module 101 needs to be raised so that the hybrid locomotive receives current from the catenary in the catenary power supply module 101 through the pantograph. On the other hand, whether the power source switching instruction is valid can be determined based on the type of the initial power source. For example, when the instruction input by the operator is to switch from the catenary to the diesel engine power supply, but the initial power source is the diesel engine power supply module 102, the operator can determine whether the instruction input by the operator is reasonable by determining the initial power source and then determining whether the initial power source and the power source switching instruction correspond.

[0064] This embodiment does not limit the specific method for determining whether the initial power source is the contact network power supply module 101. For example, it can be determined based on the condition of the pantograph, or it can be determined based on the operating condition of the diesel engine, or a voltage detection module can be set at the position where the contact network power supply module 101 and the diesel engine power supply module 102 output electrical energy to the outside, and the initial power source can be determined by detecting the voltage, or it can be other methods, which should be decided by technical personnel in this field according to actual conditions.

[0065] Before controlling the conduction between the input terminal and the second output terminal of the controllable switch module 201, this embodiment also judges and detects the type of the initial power source, thereby increasing the control accuracy and realizing one-button control of fully automatic conversion of the power source. There is no need for the operator to pay attention to the power source situation, which is convenient, fast and efficient.

[0066] In some embodiments, determining whether the initial power source is the contact network power supply module 101 includes:

[0067] Determine whether the pantograph is connected to the contact network;

[0068] If yes, it is determined that the initial power source is the contact network power supply module 101;

[0069] If not, it is determined that the initial power source is not the contact network power supply module 101 .

[0070] This embodiment determines whether the initial power source is the overhead power supply module 101 by the state of the pantograph. The determination result is accurate and does not require the addition of other equipment or devices, thereby reducing costs.

[0071] In some embodiments, switching the power source to meet a preset power supply condition includes:

[0072] Determining whether the output voltages of the switched power sources are all equal to the preset supply voltage;

[0073] If so, it is determined that the switching power source meets the preset power supply conditions.

[0074] This embodiment determines whether the switching power source meets the preset power supply conditions by the output voltage of the switching power source. That is, when the output voltage of the switching power source can supply power to the hybrid locomotive and the voltage is stable, it is determined that the switching power source meets the preset power supply conditions, thereby ensuring the stable power supply of the power supply system.

[0075] In some embodiments, when the initial power source is the overhead power supply module 101, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive includes:

[0076] Controlling the pantograph in the overhead power supply module 101 to descend;

[0077] The input terminal and the first output terminal of the controllable switch module 201 are controlled to be conductive.

[0078] This embodiment disconnects the contact network power supply module 101 from the hybrid locomotive by controlling the pantograph to descend, without installing additional equipment or devices, thereby reducing costs and improving stability.

[0079] In some embodiments, when the initial power source is the diesel engine power supply module 102, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive includes:

[0080] Controlling the disconnection between the input terminal and the second output terminal of the controllable switch module 201;

[0081] Before controlling the conduction between the input terminal and the second output terminal of the controllable switch module 201, the method further includes:

[0082] The input terminal and the first output terminal of the controllable switch module 201 are controlled to be disconnected.

[0083] This embodiment disconnects the diesel engine power supply module 102 from the hybrid locomotive by controlling the on and off of the controllable switch module 201 , and also controls the power source conversion, which is convenient and quick.

[0084] In some embodiments, please refer to FIG4 , which is a schematic structural diagram of another hybrid locomotive power supply system provided by an embodiment of the present invention. The controllable switch module 201 includes:

[0085] The switching switch 4, the first static contact of the switching switch 4 is respectively connected to the second static contact of the switching switch 4 and the diesel engine power supply module 102, the first moving contact of the switching switch 4 is respectively connected to the input end of the contact network power supply module 101 and the rectifier module 103, and the second moving contact of the controllable switch module 201 is connected to the input end of the controllable rectifier module 202.

[0086] In a specific embodiment, the contact network power supply module 101 includes a pantograph 5 in contact with the power grid 1 and a transformer 2 that converts the high voltage obtained by the pantograph 5 from the power grid 1 into a suitable voltage, the diesel engine power supply module 102 includes a diesel engine set 6, the rectifier module 103 includes a four-quadrant module 3, the controllable rectifier module 202 includes a controlled rectifier 7, and the switching switch 4 includes a first controllable switch K1 and a second controllable switch K2, and the static contacts of the first controllable switch K1 and the second controllable switch K2 are connected.

[0087] In this embodiment, the function of the controllable switch module 201 is realized by the transfer switch 4. The transfer switch 4 is small in size, reliable in performance, easy to operate, and flexible in installation, making the control of power source conversion more convenient and quick.

[0088] In some embodiments, the diesel engine power supply module 102 further includes:

[0089] The preheating module has a power supply end connected to the contact network power supply module 101 and is used to preheat the diesel engine in the diesel engine power supply module 102 through the contact network power supply module 101 before receiving a power source switching instruction when the initial power source is in the contact network power supply module 101.

[0090] In a specific embodiment, the cooling water and engine oil in the diesel engine auxiliary system need to be preheated before the diesel engine is started. When the initial power source is the contact network power supply module 101, the diesel engine in the diesel engine power supply module 102 is preheated by the electric energy generated by the contact network power supply module 101, so that the cooling water and engine oil in the diesel engine auxiliary system are maintained at a temperature that allows the diesel engine to start, but the diesel engine does not start at this time.

[0091] This embodiment preheats the diesel engine in the diesel engine power supply module 102 through the preheating module, that is, when the initial power source is the contact network power supply module 101, the energy required for diesel engine preheating is provided by the contact network power supply module 101, thereby achieving energy conservation and emission reduction and making full use of the advantages of dual power sources.

[0092] In some embodiments, the hybrid locomotive includes three modes: grid 1 mode, internal electric mode, and internal combustion mode. The hybrid locomotive is controlled by a control instruction issued by an operator to enter a corresponding mode.

[0093] When the hybrid locomotive is controlled to enter the grid 1 mode, the processor of the power supply system of the hybrid locomotive sends a pantograph raising signal to the pantograph 5 of the hybrid locomotive to enable the locomotive to draw power from the grid 1. At this time, the first controllable switch K1 and the second controllable switch K2 are both in the disconnected state; at the same time, the operator sends an internal combustion auxiliary system start-up signal to power the preheating module through the contact network power supply module 101, so that the cooling water and oil in the diesel engine auxiliary system are maintained at a temperature that allows the diesel engine to start, but the diesel engine does not start at this time; and at this time, the hybrid locomotive can be controlled by the driver controller to enter the traction state, coasting state or braking state in the grid 1 mode.

[0094] When the hybrid locomotive is controlled to enter internal power mode, if the initial power source is the catenary power supply module 101, the diesel engine power supply module 102 is controlled to start; if the initial power source is the diesel engine power supply module 102, the catenary power supply module 101 is controlled to start. Simultaneously, the traction inverter 106 is disconnected, no longer supplying power to the traction motor 107, the locomotive enters a coasting state, and the second controllable switch K2 is controlled to close. In this mode, the hybrid locomotive still draws power from the grid 1, but only supplies power to the auxiliary load 105 through the transformer 2, the four-quadrant module 3, and the intermediate DC circuit 104. Simultaneously, the diesel engine power supply module 102 starts and supplies power to the controlled rectifier 7; the controlled rectifier 7 rectifies the power to a voltage equivalent to the intermediate DC circuit 104 voltage, also supplying power to the auxiliary load 105. Therefore, in internal power mode, the diesel engine power supply module 102 and the catenary power supply module 101 jointly supply power to the locomotive's auxiliary power supply.

[0095] When the hybrid locomotive enters internal combustion mode, the processor of the hybrid locomotive's power supply system sends a pantograph-lowering signal to the hybrid locomotive's pantograph 5, allowing the locomotive to be tractioned solely by the diesel engine power supply module 102. At this point, the first controllable switch K1 closes and the second controllable switch K2 opens. The driver can then control the hybrid locomotive in internal combustion mode to enter traction, coasting, or braking.

[0096] The present invention also provides a power supply system for a hybrid locomotive, which is applied to a hybrid locomotive and includes:

[0097] A processor connected to the control terminal of the controllable switch module 201 and configured to execute the steps of the hybrid locomotive control method described above;

[0098] A controllable switch module 201, wherein the input end of the controllable switch module 201 is connected to the diesel engine power supply module 102, the first output end of the controllable switch module 201 is connected to the input end of the contact network power supply module 101 and the rectifier module 103 respectively, and the second output end of the controllable switch module 201 is connected to the input end of the controllable rectifier module 202;

[0099] Diesel engine power supply module 102;

[0100] Catenary power supply module 101;

[0101] A controllable rectifier module 202, wherein the output end of the controllable rectifier module 202 is respectively connected to the output end of the rectifier module 103 and the input end of the intermediate DC circuit 104;

[0102] Rectification module 103;

[0103] Intermediate DC circuit 104.

[0104] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the target computer program is executed by a processor, the steps of the method for starting an encrypted hard disk are implemented.

[0105] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0106] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0107] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for a hybrid locomotive, characterized in that: A processor applied to a power supply system of a hybrid locomotive, the power supply system further comprising a controllable switch module and a controllable rectifier module, the input end of the controllable switch module being connected to a diesel engine power supply module, the first output end of the controllable switch module being respectively connected to an overhead power supply module and an input end of a rectifier module, the second output end of the controllable switch module being connected to an input end of the controllable rectifier module, the output end of the controllable rectifier module being respectively connected to an output end of the rectifier module and an input end of an intermediate DC circuit, the control method comprising: When receiving a power source switching instruction, controlling the conduction between the input end and the second output end of the controllable switch module, so that the diesel engine power supply module is connected to the input end of the controllable rectifier module; According to the first voltage at the output end of the rectifier module, adjusting the second voltage output by the controllable rectifier module so that the voltage difference between the first voltage and the second voltage is within a preset rated safety voltage difference range; When the switching power source meets the preset power supply conditions, the connection between the initial power source of the hybrid locomotive and the hybrid locomotive is disconnected, the initial power source is the power source of the hybrid locomotive before receiving the power source switching instruction, and the switching power source is a power source in the dual power sources that is different from the initial power source.

2. The control method of a hybrid locomotive according to claim 1, characterized in that: Before controlling the conduction between the input terminal and the second output terminal of the controllable switch module, the method further includes: Determining whether the initial power source is the contact network power supply module; If not, the pantograph in the overhead contact power supply module is controlled to rise, so that the hybrid locomotive receives current from the overhead contact in the overhead contact power supply module through the pantograph.

3. The control method of a hybrid vehicle according to claim 2, characterized in that: Determining whether the initial power source is the contact network power supply module includes: Determining whether the pantograph is connected to the contact network; If yes, it is determined that the initial power source is the contact network power supply module; If not, it is determined that the initial power source is not the contact network power supply module.

4. The control method of a hybrid vehicle according to claim 1, characterized in that: Switch the power source to meet the preset power supply conditions, including: Determining whether the output voltages of the switching power sources are all equal to a preset supply voltage; If so, it is determined that the switching power source meets the preset power supply condition.

5. The control method of a hybrid electric vehicle according to claim 1, characterized in that: When the initial power source is the overhead power supply module, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive comprises: Controlling the pantograph in the overhead power supply module to descend; Controlling conduction between the input end and the first output end of the controllable switch module.

6. The control method of a hybrid electric vehicle according to claim 1, characterized in that: When the initial power source is the diesel engine power supply module, disconnecting the initial power source of the hybrid locomotive from the hybrid locomotive comprises: Controlling the disconnection between the input end and the second output end of the controllable switch module; Before controlling the conduction between the input terminal and the second output terminal of the controllable switch module, the method further includes: The input end and the first output end of the controllable switch module are controlled to be disconnected.

7. The control method of a hybrid vehicle according to claim 1, characterized in that: The controllable switch module comprises: A switching switch, wherein the first static contact of the switching switch is respectively connected to the second static contact of the switching switch and the diesel engine power supply module, the first moving contact of the switching switch is respectively connected to the contact network power supply module and the input end of the rectifier module, and the second moving contact of the controllable switch module is connected to the input end of the controllable rectifier module.

8. The control method of a hybrid locomotive according to any one of claims 1 to 7, characterized in that: The diesel engine power supply module also includes: A preheating module, the power supply end of the preheating module is connected to the contact network power supply module, and is used to preheat the diesel engine in the diesel engine power supply module through the contact network power supply module before receiving a power source switching instruction when the initial power source is in the contact network power supply module.

9. A power supply system for a hybrid locomotive, characterized in that: Applications in hybrid locomotives, including: A processor, the processor being connected to the control end of the controllable switch module and configured to execute the steps of the control method for a hybrid electric locomotive according to any one of claims 1 to 8; The controllable switch module, the input end of the controllable switch module is connected to the diesel engine power supply module, the first output end of the controllable switch module is respectively connected to the input end of the contact network power supply module and the rectifier module, and the second output end of the controllable switch module is connected to the input end of the controllable rectifier module; The diesel engine power supply module; The contact network power supply module; The controllable rectifier module, the output end of the controllable rectifier module is respectively connected to the output end of the rectifier module and the input end of the intermediate DC circuit; The rectifier module; The intermediate DC circuit.

10. A computer-readable storage medium, characterized in that: The target computer-readable storage medium stores a computer program, and when the target computer program is executed by a processor, the steps of the method for starting an encrypted hard disk according to any one of claims 1 to 8 are implemented.

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