Electric train, train power supply system, control method and storage medium

Abstract

The invention discloses an electric train, a train power supply system, a control method and a storage medium. The power supply system comprises a control module, a direct current pre-charging module, a direct current backflow module, an input conversion module, an alternating current pre-charging module, a first rectification module, an inversion module, an isolation transformation module, a second rectification module, a voltage stabilization module and an output conversion module. And the control module is used for controlling on-off states of contactors in the input conversion module, the output conversion module, the direct-current pre-charging module, the direct-current backflow module and the alternating-current pre-charging module according to the first power supply mode and the second power supply mode so as to convert the first power supply mode into the second power supply mode and output the second power supply mode. According to the invention, conversion of multiple power supply systems between a single-wire system AC 1500V, a single-wire system AC 1000V, a single-wire system DC 3kV, a single-wire system DC 1.5 kV and a single-wire system DC double-wire system can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of train power supply conversion, and in particular relates to an electric train and a train power supply system, a control method, and a storage medium. Background Art

[0002] At present, there are many grid voltage types in European railways, such as AC25kV / 50Hz, AC15kV / 16.7Hz, DC3kV, DC1.5kV, etc. The traction mode of passenger locomotives follows the requirements of UIC550 "Power Supply Device for Passenger Cars". The train power supply system provides single-phase AC1500V, AC1000V, DC3kV, DC1.5kV power to the power car or locomotive to the pulled passenger train. The passenger train uses its own auxiliary inverter system to power the auxiliary load. The typical topology circuit is as follows: Figure 1 shown.

[0003] Most domestic electric locomotives or power cars provide two-wire DC power (for example: DC600V) to the passenger train being pulled. The passenger train uses its own auxiliary inverter system to power the auxiliary load. The typical topology circuit is as follows: Figure 2 shown.

[0004] With the opening of more and more cross-border trains, the train power supply systems of locomotives and vehicles cannot be interchangeable, domestic passenger trains cannot be mixed with foreign passenger trains, and when trains using a two-wire DC600V train power supply system and trains using a single-phase AC1500V, AC1000V, DC3kV, DC1.5kV train power supply system are conducting mutual rescue, the train power supplies cannot be communicated with each other.

[0005] At present, in order to solve the problem of power supply for multi-current trains, a circuit composed of a rectifier module, a DC voltage regulator module, etc. is usually used to achieve the conversion of AC1500V, AC1000V, DC3kV, DC1.5kV to DC600V and DC output through PWM rectification, step-down chopping and voltage regulation, for example:

[0006] (1) The patent document with publication number CN110875681A discloses a multi-current train power supply system and its control method, wherein the primary side of the traction transformer is connected to at least one AC power supply line through an AC circuit breaker; the first tap on the secondary side of the traction transformer is connected to the AC input end of the PWM rectifier through a first isolation switch, the DC output end of the PWM rectifier is connected to the load through a multiple step-down chopper, and the DC output end is connected in parallel with an intermediate support capacitor; the second tap on the secondary side of the traction transformer is connected to the AC input end of the PWM rectifier through a second isolation switch; the first end of the first DC circuit breaker is connected to at least one DC power supply line, and the second end of the first DC circuit breaker is connected to the DC output end of the PWM rectifier through the second DC circuit breaker; the first end of the third isolation switch is grounded, and the second end of the third isolation switch is connected to the DC output end of the PWM rectifier. The system or method can meet the needs of railway transportation under different power supply systems, thereby meeting the needs of different application conditions.

[0007] (2) Patent document with authorization announcement number CN110254243B discloses a train power supply system, which includes a control module, a power supply input module, a pre-charging module, a rectifier module, a power supply output module and a DC return module; wherein the pre-charging module includes a DC pre-charging module and an AC pre-charging module; the control module is used to control the switch state of the contactor in the power supply input module according to the current grid voltage condition, so that the power supply input module outputs the power corresponding to the current grid voltage condition to the pre-charging module and outputs it through the pre-charging module; the rectifier module is used to convert the AC output of the AC pre-charging module into DC power; the power supply output module is used to output the DC output of the DC pre-charging module or the DC output of the rectifier module to each passenger car. The train power supply system can be applied to a variety of grid voltage types and can effectively reduce the power supply cost of the train.

[0008] Both of the above solutions can realize the conversion of train power supply AC1500V, AC1000V, DC3kV, DC1.5kV to DC600V and DC output. Domestic passenger trains can be connected with European passenger trains through the above two solutions to achieve power supply; however, the above two solutions cannot realize the conversion of DC600V to AC1500V, AC1000V, DC3kV, DC1.5kV power supply standards, resulting in European passenger trains being unable to connect with domestic passenger trains through the above two solutions to achieve power supply. Summary of the invention

[0009] The purpose of the present invention is to provide an electric train and a train power supply system, a control method, and a storage medium to solve the problem that the traditional power supply system can only realize one-way power supply system conversion, resulting in the inability to communicate power supply between two trains using different power supply systems. For example, a train using a DC two-wire train power supply system and a train using an AC1500V, AC1000V, DC3kV, or DC1.5kV train power supply system cannot communicate train power supply when rescuing each other.

[0010] The present invention solves the above technical problems through the following technical solutions: a train power supply system suitable for multiple power supply modes, comprising a control module, a DC pre-charging module, a DC return module, and an input conversion module, an AC pre-charging module, a first rectifier module, an inverter module, an isolation transformer module, a second rectifier module, a voltage stabilizing module and an output conversion module connected in sequence; the first end of the DC pre-charging module is connected to the first output end of the input conversion module, and the second end of the DC pre-charging module is connected to the first output end of the first rectifier module; the first end of the DC return module is connected to the second output end of the input conversion module, and the second end of the DC return module is connected to the second output end of the first rectifier module; the input conversion module is connected to the output conversion module;

[0011] The control module is used to control the contactor switch states in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module according to the first power supply standard and the second power supply standard, so as to convert the first power supply standard into the second power supply standard and output it; wherein the first power supply standard refers to the power supply standard input to the input conversion module, and the second power supply standard refers to the power supply standard output from the output conversion module.

[0012] Further, the input conversion module includes a first contactor, a second contactor, a third contactor, a twelfth contactor and a sixteenth contactor; the output conversion module includes a tenth contactor, an eleventh contactor, a thirteenth contactor, a fourteenth contactor and a fifteenth contactor;

[0013] The first end and the second end of the sixteenth contactor serve as the first input end and the first output end of the input conversion module respectively; the first end of the first contactor serves as the second input end of the input conversion module, and the second end of the first contactor is connected to the first ends of the sixteenth contactor and the third contactor; the two ends of the second contactor are respectively connected to the first end of the first contactor and the first end of the fourteenth contactor; the second end of the third contactor is connected to the second end of the eleventh contactor; the two ends of the twelfth contactor are respectively connected to the second end of the sixteenth contactor and the first end of the fifteenth contactor;

[0014] The first end of the tenth contactor serves as the first input end of the output conversion module, the second end of the tenth contactor is connected to the first end of the fourteenth contactor, and the second end of the fourteenth contactor serves as the first output end of the output conversion module; the first end of the eleventh contactor serves as the second input end of the output conversion module, the second end of the eleventh contactor is also connected to the first end of the thirteenth contactor, and the second end of the thirteenth contactor serves as the second output end of the output conversion module; the first end and the second end of the fifteenth contactor are respectively connected to the second ends of the thirteenth contactor and the fourteenth contactor.

[0015] Furthermore, the DC pre-charging module includes a first resistor, a sixth contactor, a seventh contactor, an eighth contactor and an adjustable inductor; the first resistor is connected in series with the seventh contactor and then connected in parallel to the two ends of the sixth contactor, the first end of the adjustable inductor is connected to the sixth contactor and the seventh contactor, the second ends of the adjustable inductor and the eighth contactor are both connected to the first output end of the first rectifier module, and the adjustable end of the adjustable inductor is connected to the first end of the eighth contactor.

[0016] Furthermore, the DC return module includes a ninth contactor.

[0017] Furthermore, the AC pre-charging module includes a second resistor, a fourth contactor, a fifth contactor and a fuse; the second resistor is connected in series with the fifth contactor and then connected in parallel to the two ends of the fourth contactor; the two ends of the fuse are respectively connected to the second output end of the input conversion module and the second input end of the first rectifier module.

[0018] Based on the same concept, the present invention provides an electric train, which includes at least one train power supply system as described above.

[0019] Based on the same concept, the present invention provides a train power supply method, which is applied to the train power supply system as described above, and the power supply method comprises:

[0020] Obtaining a first power supply standard and a second power supply standard;

[0021] According to the first power supply mode and the second power supply mode, the switch states of the contactors in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module are controlled to convert the first power supply mode into the second power supply mode and output it;

[0022] The first power supply mode refers to the power supply mode input to the input conversion module, and the second power supply mode refers to the power supply mode output from the output conversion module.

[0023] Further, controlling the switch states of the contactors in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module according to the first power supply mode and the second power supply mode includes:

[0024] When the first power supply mode is the same as the second power supply mode, the second contactor and the third contactor in the input conversion module are controlled, and the thirteenth contactor and the fourteenth contactor in the output conversion module are closed;

[0025] When the first power supply system is a DC two-wire system and the second power supply system is an AC single-wire system, the second contactor, the third contactor and the twelfth contactor in the input conversion module, the tenth contactor, the eleventh contactor and the fifteenth contactor in the output conversion module, and the fourth contactor and the fifth contactor in the AC pre-charging module are controlled to be closed;

[0026] When the first power supply system is a DC two-wire system and the second power supply system is a DC single-wire system, the second contactor, the third contactor and the twelfth contactor in the input conversion module, the tenth contactor, the eleventh contactor and the fifteenth contactor in the output conversion module, the sixth contactor, the seventh contactor and the eighth contactor in the DC pre-charging module, and the ninth contactor in the DC return module are controlled to be closed;

[0027] When the first power supply system is an AC single-wire system and the second power supply system is a DC two-wire system, the first contactor and the sixteenth contactor in the input conversion module, the tenth contactor, the eleventh contactor, the thirteenth contactor and the fourteenth contactor in the output conversion module, and the fourth contactor and the fifth contactor in the AC pre-charging module are controlled to be closed;

[0028] When the first power supply system is a DC single-wire system and the second power supply system is a DC two-wire system, the first contactor and the sixteenth contactor in the input conversion module, the tenth contactor, the eleventh contactor, the thirteenth contactor and the fourteenth contactor in the output conversion module, the sixth contactor, the seventh contactor and the eighth contactor in the DC pre-charging module, and the ninth contactor in the DC return module are controlled to be closed.

[0029] Furthermore, the DC two-wire system includes DC600V, the AC single-wire system includes AC1500V and AC1000V, and the DC single-wire system includes DC3000V and DC1500V.

[0030] Based on the same concept, the present invention provides a storage medium on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the train power supply method as described above is implemented.

[0031] Beneficial Effects

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] The present invention provides a train power supply system suitable for multiple systems such as AC25kV / 50Hz, AC15kV / 16.7Hz, DC3kV, DC1.5kV, etc., which can realize multiple power supply system conversion between single-wire AC1500V, AC1000V, DC3kV, DC1.5kV and DC two-wire system (for example, DC600V), that is, any power supply system of single-wire AC1500V, AC1000V, DC3kV, DC1.5kV can be converted into DC two-wire system to provide power to a train adopting the DC two-wire train power supply system, and the DC two-wire system can be converted into any power supply system of single-wire AC1500V, AC1000V, DC3kV, DC1.5kV to provide power to a train adopting the single-wire AC1500V, AC1000V, DC3kV, DC1.5kV.

[0034] The present invention is applicable to the conversion of various power supply systems or power supply modes such as AC1500V, AC1000V, DC3kV, DC1.5kV, DC600V, etc., meeting the power supply requirements of various trains in China and Europe, and solving the problem of train power supply intercommunication between trains adopting a DC two-wire train power supply system and trains adopting a single-wire train power supply system during mutual rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 This is a typical train power supply topology diagram of a multi-current locomotive outside China;

[0037] Figure 2 This is a typical DC two-wire topological structure diagram of a Chinese locomotive in the background technology of the present invention;

[0038] Figure 3 is a structural block diagram of a train power supply system in an embodiment of the present invention;

[0039] Figure 4 is a circuit schematic diagram of an input conversion module and an output conversion module in an embodiment of the present invention;

[0040] Figure 5 is a signal flow diagram when the first power supply mode and the second power supply mode are the same in an embodiment of the present invention;

[0041] Figure 6 It is a signal flow diagram when the first power supply system is a DC two-wire system and the second power supply system is a single-wire system in an embodiment of the present invention;

[0042] Figure 7 It is a signal flow diagram when the first power supply system is a single-wire power supply and the second power supply system is a DC two-wire power supply in an embodiment of the present invention;

[0043] Figure 8 It is a typical application circuit between locomotives and vehicles with different power supply systems in the train power supply system in the embodiment of the present invention.

[0044] Explanation of the accompanying drawings: 1-input conversion module, 2-AC pre-charging module, 3-DC pre-charging module, 4-DC return module, 5-first rectifier module, 6-inverter module, 7-isolation transformer module, 8-second rectifier module, 9-voltage stabilizing module, 10-output conversion module. DETAILED DESCRIPTION

[0045] The following is a clear and complete description of the technical solutions in the present invention in conjunction with the 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 creative work are within the scope of protection of the present invention.

[0046] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0047] Example 1

[0048] like Figure 3 As shown, a train power supply system suitable for multiple power supply modes provided by an embodiment of the present invention includes a control module, a DC pre-charging module 3, a DC return module 4, and an input conversion module 1, an AC pre-charging module 2, a first rectifier module 5, an inverter module 6, an isolation transformer module 7, a second rectifier module 8, a voltage stabilizing module 9 and an output conversion module 10 connected in sequence; the first end of the DC pre-charging module 3 is connected to the first output end of the input conversion module 1, and the second end of the DC pre-charging module 3 is connected to the first output end of the first rectifier module 5; the first end of the DC return module 4 is connected to the second output end of the input conversion module 1, and the second end of the DC return module 4 is connected to the second output end of the first rectifier module 5; the input conversion module 1 is connected to the output conversion module 10.

[0049] The first input terminal and the second input terminal of the input conversion module 1 are connected to the outside through the first external connector at end I and the second external connector at end I respectively; the first output terminal and the second output terminal of the output conversion module 10 are connected to the outside through the first external connector at end II and the second external connector at end II respectively.

[0050] The control module is used to control the contactor switch states in the input conversion module 1, the output conversion module 10, the DC pre-charging module 3, the DC return module 4 and the AC pre-charging module 2 according to the first power supply standard and the second power supply standard, so as to convert the first power supply standard into the second power supply standard and output it; wherein, the first power supply standard refers to the power supply standard input to the input conversion module 1 (i.e., the input power supply standard), and the second power supply standard refers to the power supply standard output from the output conversion module 10 (i.e., the output power supply standard).

[0051] In a specific embodiment of the present invention, Figure 4 As shown, the input conversion module 1 includes a first contactor KM1, a second contactor KM2, a third contactor KM3, a twelfth contactor KM12 and a sixteenth contactor KM16; the output conversion module 10 includes a tenth contactor KM10, an eleventh contactor KM11, a thirteenth contactor KM13, a fourteenth contactor KM14 and a fifteenth contactor KM15;

[0052] The first end and the second end of the sixteenth contactor KM16 serve as the first input end and the first output end of the input conversion module 1 respectively; the first end of the first contactor KM1 serves as the second input end of the input conversion module 1, and the second end of the first contactor KM1 is connected to the first ends of the sixteenth contactor and the third contactor KM3; the two ends of the second contactor KM2 are respectively connected to the first end of the first contactor KM1 and the first end of the fourteenth contactor KM14; the second end of the third contactor KM3 is connected to the second end of the eleventh contactor KM11; the two ends of the twelfth contactor KM12 are respectively connected to the second end of the sixteenth contactor KM16 and the first end of the fifteenth contactor KM15;

[0053] The first end of the tenth contactor KM10 serves as the first input end of the output conversion module 10, the second end of the tenth contactor KM10 is connected to the first end of the fourteenth contactor KM14, and the second end of the fourteenth contactor KM14 serves as the first output end of the output conversion module 10; the first end of the eleventh contactor KM11 serves as the second input end of the output conversion module 10, the second end of the eleventh contactor KM11 is also connected to the first end of the thirteenth contactor KM13, and the second end of the thirteenth contactor KM13 serves as the second output end of the output conversion module 10; the first end and the second end of the fifteenth contactor KM15 are respectively connected to the second ends of the thirteenth contactor KM13 and the fourteenth contactor KM14.

[0054] In a specific embodiment of the present invention, Figure 3 As shown, the DC pre-charging module 3 includes a first resistor R1, a sixth contactor KM6, a seventh contactor KM7, an eighth contactor KM8 and an adjustable inductor; the first resistor R1 is connected in series with the seventh contactor KM7 and then connected in parallel to the two ends of the sixth contactor KM6, the first end of the adjustable inductor is connected to the sixth contactor KM6 and the seventh contactor KM7, the second ends of the adjustable inductor and the eighth contactor KM8 are both connected to the first output end of the first rectifier module 5, and the adjustable end of the adjustable inductor is connected to the first end of the eighth contactor KM8.

[0055] In a specific embodiment of the present invention, Figure 3 As shown, the DC return module 4 includes a ninth contactor KM9.

[0056] In a specific embodiment of the present invention, Figure 3 As shown, the AC pre-charging module 2 includes a second resistor R2, a fourth contactor KM4, a fifth contactor KM5 and a fuse FU1; the second resistor R2 is connected in series with the fifth contactor KM5 and then connected in parallel to the two ends of the fourth contactor KM4; the two ends of the fuse FU1 are respectively connected to the second output end of the input conversion module 1 and the second input end of the first rectifier module 5.

[0057] The main functions of the DC pre-charging module 3 and the AC pre-charging module 2 are to reduce the impact current, filtering, etc.; the DC loop module mainly realizes the reflux under the DC grid voltage condition. The first rectifier module 5 and the second rectifier module 8 are used to realize the function of converting AC to DC, the inverter module 6 is used to realize the function of converting DC to AC, and the voltage stabilizing module 9 plays a role in voltage stabilization. The first rectifier module 5, the inverter module 6, the second rectifier module 8, and the voltage stabilizing module 9 are mainly composed of diodes, controllable components, capacitors, contactors, resistors, trigger circuits and other components. The purpose of converting the rectifier module to the inverter module 6 and the inverter module 6 to the rectifier module can be achieved by controlling the controllable components and the trigger circuit. The isolation transformer module 7 is composed of a △ / Y-type transformer, the purpose of which is to realize the isolation between AC1500V, AC1000V, DC3kV, DC1.5kV power supplies and DC600V power supplies, and at the same time realize the step-down of the inverter module 6 output to the second rectifier module 8 input or the step-up of the second rectifier module 8 output to the inverter module 6 input. The control module mainly consists of the coils of each contactor and the control circuit of the thyristor module.

[0058] In a specific embodiment of the present invention, the control module is used to control the contactor switch states in the input conversion module 1, the output conversion module 10, the DC pre-charging module 3, the DC return module 4 and the AC pre-charging module 2 according to the first power supply mode and the second power supply mode, specifically including:

[0059] (1) When the first power supply mode is the same as the second power supply mode, the control module controls the second contactor KM2 and the third contactor KM3 in the input conversion module 1, and the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10 are closed, and the other contactors are disconnected. The input conversion module 1 is directly connected to the output conversion module 10, and the power input to the input conversion module 1 is directly output from the output end of the output conversion module 10 without passing through the DC pre-charging module 3, the DC return module 4, the AC pre-charging module 2, the first rectifier module 5, the inverter module 6, the isolation transformer module 7, the second rectifier module 8 and the voltage stabilizing module 9. Figure 5 shown.

[0060] (2) When the first power supply system is a DC two-wire system (e.g., DC600V) and the second power supply system is an AC single-wire system (e.g., AC1500V / 50Hz or AC1000V / 16.7Hz), the control module controls the second contactor KM2, the third contactor KM3 and the twelfth contactor KM12 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11 and the fifteenth contactor KM15 in the output conversion module 10, the fourth contactor KM4 and the fifth contactor KM5 in the AC pre-charging module 2 to be closed, and the other contactors are closed. The two-wire DC power supply is disconnected, and the connecting line between the input conversion module 1 and the output conversion module 10 is connected to the reverse input of the voltage stabilizing module 9; the original second rectifier module 8 is changed into a DC / AC inverter module, the original inverter module 6 is changed into an AC / DC rectifier module, and the original first rectifier module 5 is changed into a DC / AC inverter module. The two-wire DC power supply passes through the voltage stabilizing module 9, the second rectifier module 8, the isolation transformer module 7, the inverter module 6, the first rectifier module 5, the AC pre-charging module 2 and the output conversion module 10 in sequence, and then outputs an AC single-wire power supply, such as Figure 6 shown.

[0061] (3) When the first power supply system is a DC two-wire system (for example, DC600V) and the second power supply system is a DC single-wire system (for example, DC3000V or DC1500V), the control module controls the second contactor KM2, the third contactor KM3 and the twelfth contactor KM12 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11 and the fifteenth contactor KM15 in the output conversion module 10, the sixth contactor KM6, the seventh contactor KM7 and the eighth contactor KM8 in the DC pre-charging module 3, and the DC return module 10. The ninth contactor KM9 in block 4 is closed, and the other contactors are disconnected. The DC two-wire power supply is connected to the reverse input of the voltage stabilizing module 9 through the connecting line between the input conversion module 1 and the output conversion module 10; the original second rectifier module 8 is changed into a DC / AC inverter module, and the original inverter module 6 is changed into an AC / DC rectifier module. The DC two-wire power supply passes through the voltage stabilizing module 9, the second rectifier module 8, the isolation transformer module 7, the inverter module 6, the DC pre-charging module 3, the DC return module 4 and the output conversion module 10 in sequence, and then outputs a DC single-wire power supply, such as Figure 6 shown.

[0062] (4) When the first power supply system is an AC single-wire system (for example, AC1500V / 50Hz or AC1000V / 16.7Hz) and the second power supply system is a DC two-wire system (for example, DC600V), the control module controls the first contactor KM1 and the sixteenth contactor KM16 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11, the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10, the fourth contactor KM4 and the fifth contactor KM5 in the AC pre-charging module 2 are closed, and the other contactors are disconnected. The input conversion module 1 is connected to the AC pre-charging module 2, and the AC single-wire power supply is output as a DC two-wire power supply after passing through the AC pre-charging module 2, the first rectifier module 5, the inverter module 6, the isolation transformer module 7, the second rectifier module 8, the voltage regulator module 9 and the output conversion module 10. Figure 7 shown.

[0063] (5) When the first power supply system is a DC single-wire system (for example, DC3000V or DC1500V) and the second power supply system is a DC two-wire system (for example, DC600V), the control module controls the first contactor KM1 and the sixteenth contactor KM16 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11, the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10, the sixth contactor KM6, the seventh contactor KM7 and the eighth contactor KM8 in the DC pre-charging module 3, and the ninth contactor KM9 in the DC return module 4 to be closed, and the other contactors are disconnected, the input conversion module 1 is connected to the DC pre-charging module 3, and the DC single-wire power supply is output as a DC two-wire power supply after passing through the DC pre-charging module 3, the inverter module 6, the isolation transformer module 7, the second rectifier module 8, the voltage regulator module 9 and the output conversion module 10, as shown in FIG. Figure 7 shown.

[0064] The embodiment of the present invention further provides an electric train, which includes at least one train power supply system in the embodiment of the present application. Figure 8 As shown, the electric train includes a power supply input circuit of a power car / locomotive, three train power supply systems in the embodiments of the present application, a power supply bus, auxiliary converter circuits and control circuits for passenger vehicles with different power supply systems. The power car or locomotive is connected to a passenger train using a DC two-wire train power supply system or a passenger train using an AC1500V, AC1000V, DC3kV, or DC1.5kV train power supply system through the train power supply system and the power supply bus in the embodiments of the present application to provide power for each passenger vehicle. Figure 8 Each train power supply system controls the contactor switch state in the train power supply system according to the power supply mode of the trains connected at both ends of the train power supply system, so as to achieve the purpose of converting the input power supply mode into the output power supply mode.

[0065] If the power supply input circuit of the power car / locomotive outputs a single-wire power supply of one of the standards of AC1500V, AC1000V, DC3kV, and DC1.5kV, and is connected to the external connector at end I or end II of the train power supply system, end II or end I of the train power supply system can output the power supply standard of the original input end, or convert it to a two-wire DC600V power supply standard, and output it to the auxiliary converter circuit of the passenger train through the power supply bus circuit, and finally provide power to the auxiliary load of the passenger train. It can also provide rescue train power input power to other power cars / locomotives through the power supply bus circuit.

[0066] If the power supply input circuit of the power car / locomotive outputs a two-wire DC600V power supply and is connected to the external connector at end I or end II of the train power supply system, end II or end I of the train power supply system can output the power supply format of the original input end, or it can be converted into one of the single-wire AC1500V, AC1000V, DC3kV, and DC1.5kV power supply formats, and output it to the auxiliary converter circuit of the passenger train through the power supply bus circuit, and finally provide power to the auxiliary load of the passenger train. It can also provide rescue train power input power to other power cars / locomotives through the power supply bus circuit.

[0067] The power supply input circuit of the power car / locomotive includes circuits that provide AC1500V, AC1000V, DC3kV, DC1.5kV power supplies, and may also include circuits that provide DC600V power supplies. It is usually composed of the secondary winding of the traction transformer, a rectifier circuit, a voltage stabilizing circuit, a contactor, etc.

[0068] Example 2

[0069] The embodiment of the present invention provides a train power supply method, which is applied to the train power supply system in embodiment 1 of the present application. The power supply method includes the following steps:

[0070] Step 1: Obtain a first power supply standard and a second power supply standard;

[0071] Step 2: According to the first power supply mode and the second power supply mode, the contactor switch states in the control input conversion module 1, the output conversion module 10, the DC pre-charging module 3, the DC return module 4 and the AC pre-charging module 2 are converted into the second power supply mode and output;

[0072] The first power supply mode refers to the power supply mode input to the input conversion module 1 (ie, the input power supply mode), and the second power supply mode refers to the power supply mode output from the output conversion module 10 (ie, the output power supply mode).

[0073] In a specific embodiment of the present invention, the contactor switch states in the input conversion module 1, the output conversion module 10, the DC pre-charging module 3, the DC return module 4 and the AC pre-charging module 2 are controlled according to the first power supply mode and the second power supply mode, including:

[0074] (1) When the first power supply mode is the same as the second power supply mode, the second contactor KM2 and the third contactor KM3 in the input conversion module 1, the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10 are controlled to be closed, and the other contactors are disconnected. The input conversion module 1 is directly connected to the output conversion module 10, and the power input to the input conversion module 1 is directly output from the output end of the output conversion module 10 without passing through the DC pre-charging module 3, the DC return module 4, the AC pre-charging module 2, the first rectifier module 5, the inverter module 6, the isolation transformer module 7, the second rectifier module 8 and the voltage stabilizing module 9, as shown in FIG. Figure 5 shown.

[0075] (2) When the first power supply system is a DC two-wire system (e.g., DC600V) and the second power supply system is an AC single-wire system (e.g., AC1500V / 50Hz or AC1000V / 16.7Hz), the second contactor KM2, the third contactor KM3 and the twelfth contactor KM12 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11 and the fifteenth contactor KM15 in the output conversion module 10, the fourth contactor KM4 and the fifth contactor KM5 in the AC pre-charging module 2 are closed, and the other contactors are closed. Disconnect, connect the DC two-wire power supply to the reverse input of the voltage stabilizing module 9 through the connecting line between the input conversion module 1 and the output conversion module 10; change the original second rectifier module 8 into a DC / AC inverter module, the original inverter module 6 into an AC / DC rectifier module, and the original first rectifier module 5 into a DC / AC inverter module. The DC two-wire power supply passes through the voltage stabilizing module 9, the second rectifier module 8, the isolation transformer module 7, the inverter module 6, the first rectifier module 5, the AC pre-charging module 2 and the output conversion module 10 in sequence, and then outputs an AC single-wire power supply, such as Figure 6 shown.

[0076] (3) When the first power supply system is a DC two-wire system (e.g., DC600V) and the second power supply system is a DC single-wire system (e.g., DC3000V or DC1500V), the second contactor KM2, the third contactor KM3 and the twelfth contactor KM12 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11 and the fifteenth contactor KM15 in the output conversion module 10, the sixth contactor KM6, the seventh contactor KM7 and the eighth contactor KM8 in the DC pre-charging module 3, and the DC return module 4 are controlled. The ninth contactor KM9 in the circuit is closed, and the other contactors are disconnected. The DC two-wire power supply is connected to the reverse input of the voltage stabilizing module 9 through the connecting line between the input conversion module 1 and the output conversion module 10; the original second rectifier module 8 is changed into a DC / AC inverter module, and the original inverter module 6 is changed into an AC / DC rectifier module. The DC two-wire power supply passes through the voltage stabilizing module 9, the second rectifier module 8, the isolation transformer module 7, the inverter module 6, the DC pre-charging module 3, the DC return module 4 and the output conversion module 10 in sequence, and then outputs a DC single-wire power supply, such as Figure 6 shown.

[0077] (4) When the first power supply system is an AC single-wire system (for example, AC1500V / 50Hz or AC1000V / 16.7Hz) and the second power supply system is a DC two-wire system (for example, DC600V), the first contactor KM1 and the sixteenth contactor KM16 in the input conversion module 1 are controlled, the tenth contactor KM10, the eleventh contactor KM11, the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10, the fourth contactor KM4 and the fifth contactor KM5 in the AC pre-charging module 2 are closed, and the other contactors are disconnected, the input conversion module 1 is connected to the AC pre-charging module 2, and the AC single-wire power supply is output as a DC two-wire power supply after passing through the AC pre-charging module 2, the first rectifier module 5, the inverter module 6, the isolation transformer module 7, the second rectifier module 8, the voltage regulator module 9 and the output conversion module 10, as shown in FIG. Figure 7 shown.

[0078] (5) When the first power supply system is a DC single-wire system (for example, DC3000V or DC1500V) and the second power supply system is a DC two-wire system (for example, DC600V), the first contactor KM1 and the sixteenth contactor KM16 in the input conversion module 1, the tenth contactor KM10, the eleventh contactor KM11, the thirteenth contactor KM13 and the fourteenth contactor KM14 in the output conversion module 10, the sixth contactor KM6, the seventh contactor KM7 and the eighth contactor KM8 in the DC pre-charging module 3, and the ninth contactor KM9 in the DC return module 4 are closed, and the other contactors are disconnected. The input conversion module 1 is connected to the DC pre-charging module 3, and the DC single-wire power supply is output as a DC two-wire power supply after passing through the DC pre-charging module 3, the inverter module 6, the isolation transformer module 7, the second rectifier module 8, the voltage regulator module 9 and the output conversion module 10, as shown in FIG. Figure 7 shown.

[0079] The present invention can convert any single-wire power supply system of AC1500V, AC1000V, DC3kV, and DC1.5kV into a DC two-wire system to provide power to a train adopting a DC two-wire train power supply system, and can also convert the DC two-wire system into any single-wire power supply system of AC1500V, AC1000V, DC3kV, and DC1.5kV to provide power to a train adopting a single-wire AC1500V, AC1000V, DC3kV, and DC1.5kV train power supply system.

[0080] Example 3

[0081] Although not shown, an embodiment of the present invention further provides a storage medium on which a computer program / instruction is stored, and when the computer program / instruction is executed by a processor, the train power supply method in the embodiment of the present application is implemented.

[0082] Storage media in embodiments of the present invention include permanent and non-permanent, removable and non-removable items that can be implemented by any method or technology to store information. Examples of storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0083] What is disclosed above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or modifications within the technical scope disclosed in the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A train power supply system applicable to multiple power supply modes, characterized in that: The power supply system includes a control module, a DC pre-charging module, a DC return module, and an input conversion module, an AC pre-charging module, a first rectifier module, an inverter module, an isolation transformer module, a second rectifier module, a voltage stabilizing module and an output conversion module connected in sequence; the first end of the DC pre-charging module is connected to the first output end of the input conversion module, and the second end of the DC pre-charging module is connected to the first output end of the first rectifier module; the first end of the DC return module is connected to the second output end of the input conversion module, and the second end of the DC return module is connected to the second output end of the first rectifier module; the input conversion module is connected to the output conversion module; The control module is used to control the contactor switch states in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module according to the first power supply standard and the second power supply standard, so as to convert the first power supply standard into the second power supply standard and output it; wherein the first power supply standard refers to the power supply standard input to the input conversion module, and the second power supply standard refers to the power supply standard output from the output conversion module.

2. The train power supply system according to claim 1, characterized in that: The input conversion module includes a first contactor, a second contactor, a third contactor, a twelfth contactor and a sixteenth contactor; the output conversion module includes a tenth contactor, an eleventh contactor, a thirteenth contactor, a fourteenth contactor and a fifteenth contactor; The first end and the second end of the sixteenth contactor serve as the first input end and the first output end of the input conversion module respectively; The first end of the first contactor serves as the second input end of the input conversion module, and the second end of the first contactor is connected to the first ends of the sixteenth contactor and the third contactor; the two ends of the second contactor are respectively connected to the first end of the first contactor and the first end of the fourteenth contactor; the second end of the third contactor is connected to the second end of the eleventh contactor; the two ends of the twelfth contactor are respectively connected to the second end of the sixteenth contactor and the first end of the fifteenth contactor; The first end of the tenth contactor serves as the first input end of the output conversion module, the second end of the tenth contactor is connected to the first end of the fourteenth contactor, and the second end of the fourteenth contactor serves as the first output end of the output conversion module; the first end of the eleventh contactor serves as the second input end of the output conversion module, the second end of the eleventh contactor is also connected to the first end of the thirteenth contactor, and the second end of the thirteenth contactor serves as the second output end of the output conversion module; the first end and the second end of the fifteenth contactor are respectively connected to the second ends of the thirteenth contactor and the fourteenth contactor.

3. The train power supply system according to claim 1, characterized in that: The DC pre-charging module includes a first resistor, a sixth contactor, a seventh contactor, an eighth contactor and an adjustable inductor; the first resistor is connected in series with the seventh contactor and then connected in parallel to the two ends of the sixth contactor, the first end of the adjustable inductor is connected to the sixth contactor and the seventh contactor, the second ends of the adjustable inductor and the eighth contactor are both connected to the first output end of the first rectifier module, and the adjustable end of the adjustable inductor is connected to the first end of the eighth contactor.

4. The train power supply system according to claim 1, characterized in that: The DC return module includes a ninth contactor.

5. The train power supply system according to claim 1, characterized in that: The AC pre-charging module includes a second resistor, a fourth contactor, a fifth contactor and a fuse; the second resistor is connected in series with the fifth contactor and then connected in parallel to the two ends of the fourth contactor; the two ends of the fuse are respectively connected to the second output end of the input conversion module and the second input end of the first rectifier module.

6. An electric train, characterized in that: The electric train comprises at least one train power supply system according to any one of claims 1 to 5.

7. A train power supply method, characterized in that: Applicable to the train power supply system according to any one of claims 1 to 6, the power supply method comprising: Obtaining a first power supply standard and a second power supply standard; According to the first power supply mode and the second power supply mode, the switch states of the contactors in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module are controlled to convert the first power supply mode into the second power supply mode and output it; The first power supply mode refers to the power supply mode input to the input conversion module, and the second power supply mode refers to the power supply mode output from the output conversion module.

8. The train power supply method according to claim 7, characterized in that: Controlling the switch states of the contactors in the input conversion module, the output conversion module, the DC pre-charging module, the DC return module and the AC pre-charging module according to the first power supply mode and the second power supply mode includes: When the first power supply mode is the same as the second power supply mode, the second contactor and the third contactor in the input conversion module are controlled, and the thirteenth contactor and the fourteenth contactor in the output conversion module are closed; When the first power supply system is a DC two-wire system and the second power supply system is an AC single-wire system, the second contactor, the third contactor and the twelfth contactor in the input conversion module, the tenth contactor, the eleventh contactor and the fifteenth contactor in the output conversion module, and the fourth contactor and the fifth contactor in the AC pre-charging module are controlled to be closed; When the first power supply system is a DC two-wire system and the second power supply system is a DC single-wire system, the second contactor, the third contactor and the twelfth contactor in the input conversion module, the tenth contactor, the eleventh contactor and the fifteenth contactor in the output conversion module, the sixth contactor, the seventh contactor and the eighth contactor in the DC pre-charging module, and the ninth contactor in the DC return module are controlled to be closed; When the first power supply system is an AC single-wire system and the second power supply system is a DC two-wire system, the first contactor and the sixteenth contactor in the input conversion module, the tenth contactor, the eleventh contactor, the thirteenth contactor and the fourteenth contactor in the output conversion module, and the fourth contactor and the fifth contactor in the AC pre-charging module are controlled to be closed; When the first power supply system is a DC single-wire system and the second power supply system is a DC two-wire system, the first contactor and the sixteenth contactor in the input conversion module, the tenth contactor, the eleventh contactor, the thirteenth contactor and the fourteenth contactor in the output conversion module, the sixth contactor, the seventh contactor and the eighth contactor in the DC pre-charging module, and the ninth contactor in the DC return module are controlled to be closed.

9. The train power supply method according to claim 8, characterized in that: The DC two-wire system includes DC600V, the AC single-wire system includes AC1500V and AC1000V, and the DC single-wire system includes DC3000V and DC1500V.

10. A storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the train power supply method as described in any one of claims 7 to 9 is implemented.

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