CN114013277B - Train power supply method, system, device and train - Google Patents

Train power supply method, system, device and train Download PDF

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Publication number
CN114013277B
CN114013277B CN202111487053.7A CN202111487053A CN114013277B CN 114013277 B CN114013277 B CN 114013277B CN 202111487053 A CN202111487053 A CN 202111487053A CN 114013277 B CN114013277 B CN 114013277B
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China
Prior art keywords
contactor
power supply
traction
storage battery
power
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CN202111487053.7A
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Chinese (zh)
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CN114013277A (en
Inventor
王学亮
迟鹏飞
许万涛
万松琦
邓超月
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CRRC Qingdao Sifang Co Ltd
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CRRC Qingdao Sifang Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a train power supply method, a system, a device and a train, wherein in the scheme, when a power grid power supply instruction is received, a pantograph is controlled to rise, a main circuit breaker is closed, a first end and a third end of an isolating switch are connected, a power grid supplies power to a traction motor through a traction transformer and a traction converter so as to realize traction of the train, and a storage battery is charged so as to store electric energy; when a power supply instruction of the storage battery is received, the pantograph is controlled to descend, the main circuit breaker is disconnected, the first end and the second end of the isolating switch are connected, and the storage battery supplies power for the traction motor. The control logic in this application can make the train all can normally pull under two kinds of operating modes, and can guarantee through the action of control isolator in this application that above-mentioned two operating modes keep apart completely when switching, has avoided having the risk of cluster electricity between the circuit.

Description

Train power supply method, system, device and train
Technical Field
The invention relates to the field of power supply, in particular to a train power supply method, a train power supply system, a train power supply device and a train.
Background
In the prior art, traction energy of a train is used for taking electricity to a contact net through a pantograph to finish the traction power supply of a vehicle, but the condition that the train cannot be contacted with the contact net or the contact net is not electrified occurs, and in order to ensure that the train can realize a normal traction function under the condition, a storage battery is additionally arranged in a power supply system so as to control the storage battery to supply power to the train when the train cannot realize the traction function through the contact net. In summary, it is necessary to provide a power supply method for a train to ensure reliable switching of the train in two power supply modes.
Disclosure of Invention
The invention aims to provide a train power supply method, a train power supply system, a train power supply device and a train, so that the train can be normally pulled under two working conditions, and the two working conditions can be completely isolated during switching by controlling the action of an isolating switch, so that the risk of serial power between circuits is avoided.
In order to solve the technical problems, the invention provides a power supply method for a train, which is applied to a processor in the train, the train further comprises a pantograph, a main circuit breaker, a traction transformer, a traction converter, a storage battery and an isolating switch, wherein the pantograph, the main circuit breaker, the traction transformer and the traction converter are sequentially connected from a power grid end to a traction motor end, a first end of the isolating switch is connected with one end of the storage battery, a second end of the isolating switch is connected with one end of the traction converter, and a third end of the isolating switch is connected with the other end of the traction converter, and the method comprises the following steps:
determining whether the received power supply instruction is a storage battery power supply instruction or a power grid power supply instruction;
if the power supply instruction is given to the storage battery, the pantograph is controlled to descend, the main circuit breaker is disconnected, and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power to the traction motor through the traction converter;
and if the power supply instruction is given to the power grid, controlling the pantograph to rise, closing the main circuit breaker and connecting the first end and the third end of the isolating switch, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter.
Preferably, the train further comprises a load;
after determining whether the power supply command is a storage battery power supply command or a power grid power supply command, the method further comprises the following steps:
if the storage battery power supply instruction is given, the storage battery is controlled to supply power for the load;
and if the power supply command is given to the power grid, controlling the power grid to supply power to the load.
Preferably, controlling the battery to supply power to the load includes:
and a control part of the storage battery supplies power for the traction motor through the traction converter, and another part of the storage battery is controlled to supply power for the load.
Preferably, the traction converter comprises a rectifying module, an inverting module, an auxiliary inverter, a charger, a first contactor, a second contactor, a third contactor and a fourth contactor;
the first end of the rectifying module is connected with the output end of the traction transformer through the first contactor, the second end of the rectifying module is connected with the power supply end of the traction motor through the inversion module, is connected with the second end of the isolating switch through the second contactor and is connected with the first end of the auxiliary inverter through the third contactor, the second end of the auxiliary inverter is connected with the input end of the charger, and the output end of the charger is connected with the third end of the isolating switch through the fourth contactor;
the control the pantograph descends, the main circuit breaker is disconnected and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power for the traction motor through the traction converter, and the control method comprises the following steps:
controlling the pantograph to descend, the main circuit breaker to be opened, the first end of the isolating switch to be connected with the second end, the first contactor to be opened, the second contactor to be closed, the third contactor to be opened and the fourth contactor to be opened, so that the storage battery supplies power to the traction motor through the isolating switch, the second contactor and the inversion module;
the control the pantograph rises, the main circuit breaker is closed and the first end and the third end of the isolating switch are connected, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter, and the control method comprises the following steps:
the pantograph is controlled to rise, the main circuit breaker is closed, the first end of the isolating switch is connected with a third end, the first contactor is closed, the second contactor is opened, the third contactor is closed, and the fourth contactor is closed, so that the power grid supplies power to the traction motor through the first contactor, the rectifying module and the inversion module, and charges the storage battery through the first contactor, the rectifying module, the third contactor, the auxiliary inverter, the charger, the fourth contactor and the isolating switch.
Preferably, determining whether the received power supply command is a battery power supply command or a grid power supply command includes:
determining whether the mode switching knob is at a battery supply potential or a grid supply potential;
if the power supply command is at the power supply potential of the storage battery, determining that the power supply command is the power supply command of the storage battery;
and if the power supply command is at the power supply potential of the power grid, determining the power supply command as the power supply command of the power grid.
Preferably, the train includes a plurality of the storage batteries, and N storage batteries are one storage battery pack, N being an integer not less than 1;
causing the battery to power the traction motor through the traction converter, comprising:
when a storage battery power supply instruction is received, a first storage battery pack supplies power to the traction motor through the traction converter, and when the storage battery power supply instruction is received next time, a storage battery pack different from the first storage battery pack supplies power to the traction motor through the traction converter.
In order to solve the technical problem, the invention also provides a train power supply system, which is applied to a processor in a train, the train further comprises a pantograph, a main circuit breaker, a traction transformer, a traction converter, a storage battery and an isolating switch, wherein the pantograph, the main circuit breaker, the traction transformer and the traction converter are sequentially connected from a power grid end to a traction motor end, a first end of the isolating switch is connected with one end of the storage battery, a second end of the isolating switch is connected with one end of the traction converter, and the other end of the isolating switch is connected with the other end of the traction converter, and the system comprises:
the determining unit is used for determining whether the received power supply instruction is a storage battery power supply instruction or a power grid power supply instruction;
the first control unit is used for controlling the pantograph to descend, the main circuit breaker to be disconnected and the first end and the second end of the isolating switch to be connected if the power supply instruction is given to the storage battery, so that the storage battery supplies power to the traction motor through the traction converter;
and the second control unit is used for controlling the pantograph to rise, the main circuit breaker to be closed and the first end of the isolating switch to be connected with the third end if the power supply instruction is given to the power grid, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter.
In order to solve the technical problem, the invention also provides a train power supply device, which comprises:
a memory for storing a computer program;
and the processor is used for realizing the steps of the train power supply method when executing the computer program.
In order to solve the technical problem, the invention also provides a train, which comprises the train power supply device, a pantograph, a main circuit breaker, a traction transformer, a traction converter, a storage battery and an isolating switch, wherein the pantograph, the main circuit breaker, the traction transformer and the traction converter are sequentially connected from a power grid end to a traction motor end, the first end of the isolating switch is connected with one end of the storage battery, the second end of the isolating switch is connected with one end of the traction converter, and the other end of the isolating switch is connected with the other end of the traction converter.
Preferably, the system further comprises a mode switching knob for sending a storage battery power supply instruction or a power grid power supply instruction according to a user instruction.
The application provides a train power supply method, a system, a device and a train, wherein in the scheme, when a power grid power supply instruction is received, a pantograph is controlled to rise, a main circuit breaker is closed, a first end and a third end of a disconnecting switch are connected, a power grid supplies power to a traction motor through a traction transformer and a traction converter so as to realize traction of the train, and a storage battery is charged so as to store electric energy; when a power supply instruction of the storage battery is received, the pantograph is controlled to descend, the main circuit breaker is disconnected, the first end and the second end of the isolating switch are connected, and the storage battery supplies power for the traction motor. The control logic in this application can make the train all can normally pull under two kinds of operating modes, and can guarantee through the action of control isolator in this application that above-mentioned two operating modes keep apart completely when switching, has avoided having the risk of cluster electricity between the circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a train power supply method provided by the invention;
fig. 2 is a block diagram of a train power supply system provided by the invention;
FIG. 3 is a block diagram of a train power supply device provided by the invention;
fig. 4 is a block diagram of a train according to the present invention.
Detailed Description
The invention provides a train power supply method, a train power supply system, a train power supply device and a train, which can enable the train to be pulled normally under two working conditions, and can ensure that the two working conditions are completely isolated during switching by controlling the action of an isolating switch, so that the risk of serial power between circuits is avoided.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of a power supply method of a train, the method is applied to a processor in the train, the train further comprises a pantograph, a main circuit breaker, a traction transformer, a traction converter, a storage battery and an isolating switch, wherein the pantograph, the main circuit breaker, the traction transformer and the traction converter are sequentially connected from a power grid end to a traction motor end, a first end of the isolating switch is connected with one end of the storage battery, a second end of the isolating switch is connected with one end of the traction converter, and a third end of the isolating switch is connected with the other end of the traction converter, and the method comprises:
s11: determining whether the received power supply instruction is a storage battery power supply instruction or a power grid power supply instruction;
specifically, before each module of the train is controlled, it is required to determine whether the power supply command received by the train is a storage battery command or a power grid power supply command, and then different control is performed on the train through different received commands.
S12: if the power supply instruction is given to the storage battery, the pantograph is controlled to descend, the main circuit breaker is disconnected, and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power to the traction motor through the traction converter;
s13: and if the power supply command is given to the power grid, controlling the pantograph to rise, closing the main circuit breaker and connecting the first end and the third end of the isolating switch, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter.
The functions of the various components in the train are first stated:
pantograph: for introducing AC power from the grid into the train (AC power from the grid may be, but is not limited to, AC (Alternating Current, AC) 25 KV);
main circuit breaker: after the pantograph is lifted, closing a main breaker, and introducing alternating current into the traction transformer;
traction transformer: converting the high voltage AC power of the grid to a low voltage AC power (which may be, but is not limited to, converting AC25KV to AC 970V);
traction converter: when the power grid supplies power, rectifying low-voltage alternating current output by the traction transformer to charge a storage battery, and inverting the rectified direct current to supply power to the traction motor so as to realize the functions of energy storage and traction; when the power grid cannot supply power, the direct current output by the storage battery is inverted to supply power for the traction motor, so that normal traction of the train is ensured.
Isolation switch: when the first end and the second end of the isolating switch are connected, the power supply loop of the power grid is disconnected, and when the first end and the third end of the isolating switch are connected, the power supply loop of the storage battery is disconnected, thereby achieving the function of circuit isolation
Storage battery: when the power grid supplies power for the train, the power supply system is in a charging state, and when the power grid does not supply power for the train, the power supply system is in a power supply state.
Further, in the application, when receiving the battery power supply instruction, the power grid power supply loop is disconnected, namely, the pantograph descends, the main circuit breaker is disconnected, the first end and the third end of the isolating switch are disconnected, the battery power supply loop is conducted, namely, the first end and the second end of the isolating switch are controlled to be connected, and the battery supplies power for the traction motor through the traction converter so as to realize the normal traction function of the train. And when receiving a power supply instruction of the power grid, disconnecting the power supply loop of the storage battery, namely, controlling the first end and the second end of the isolating switch to be disconnected, and conducting the power supply loop of the power grid, namely, controlling the pantograph to rise, the main circuit breaker to be closed and the first end of the isolating switch to be connected with the third end, so that the power grid supplies power to the traction motor through the pantograph, the main circuit breaker, the traction transformer and the traction converter, the normal traction function of the train is realized, and the power grid charges the storage battery through the pantograph, the main circuit breaker, the traction transformer, the traction converter and the isolating switch, thereby realizing the energy storage function.
The isolating switch in the application can select a switch with a single-pole double-throw structure, and can also select other modes, such as a DC/DC (DC-to-DC Converter) boosting module, a contactor and the like, and the advantage of the single-pole double-throw switch is that the state of the switch can only exist one of the two types, namely the first end of the isolating switch cannot be simultaneously connected with the second end and the third end, so that two power supply loops can be thoroughly isolated, the risk of two circuit connection caused by failure of an isolating element is avoided, and the risk of serial power is avoided when the two power supply working conditions are switched.
As a preferred embodiment, determining whether the received power command is a battery power command or a grid power command includes:
determining whether the mode switching knob is at a battery supply potential or a power grid supply potential;
if the power supply command is at the power supply potential of the storage battery, determining the power supply command as the power supply command of the storage battery;
and if the power supply command is at the power supply potential of the power grid, determining the power supply command as the power supply command of the power grid.
Specifically, the power supply command may be, but not limited to, sent by a user, where the mode of sending the power supply command by the user may be through a mode switching knob, where the mode switching knob includes two gears, and when the mode switching knob dials to the power supply potential of the storage battery, the power supply command is determined to be the power supply command of the storage battery at this time, and when the mode switching knob dials to the power supply potential of the power grid, the power supply command is determined to be the power supply command of the power grid at this time.
Of course, the manner of sending the power supply command is not limited to the above example, and other implementations are also possible, such as sending the power supply command through a display screen, or detecting the state of the power grid voltage, sending the power grid power supply command when the voltage is within the preset range, and sending the battery power supply command when the voltage is not within the preset range.
In conclusion, the control logic in the application can enable the train to be pulled normally under the two working conditions, and the operation of the isolating switch can be controlled to ensure that the two working conditions are completely isolated during switching, so that the risk of serial electricity between circuits is avoided.
Based on the above embodiments:
as a preferred embodiment, the train further comprises a load;
after determining whether the power supply command is a storage battery power supply command or a power grid power supply command, the method further comprises the following steps:
if the power supply instruction is given to the storage battery, controlling the storage battery to supply power for the load;
and if the power supply command is given to the power grid, controlling the power grid to supply power to the load.
In order to further ensure that each module in the train can work normally so as to improve the experience of each person in the train in riding the train, the embodiment limits that the train not only comprises a traction motor but also comprises loads, such as an air conditioner, a display screen, various alarms and the like, and the loads also need to be powered normally; similarly, when a storage battery power supply instruction is received, the storage battery supplies power for all loads in the train besides the traction motor, so that the loads in the train can work normally no matter what working conditions are, and the experience of passengers is improved.
As a preferred embodiment, controlling the battery to supply power to the load includes:
the control part of the storage batteries supply power to the traction motor through the traction converter, and the other part of the storage batteries are controlled to supply power to the load.
Considering that when the storage battery is used for supplying power to the traction motor and the load at the same time, the load of the storage battery suddenly increases in a gap between the working condition of power supply of the power grid and the working condition of power supply of the storage battery, and the phenomenon of overcurrent is likely to occur.
In order to solve the problem, the traction motor and the load are separately powered when the storage battery is used for supplying power, specifically, one part of the storage battery is controlled to supply power for the traction motor, and the other part of the storage battery is used for supplying power for the load, so that the increase value of the load of the storage battery is reduced, and overcurrent is avoided.
Wherein the battery powering the traction motor may be, but is not limited to being, 50% of the total battery included in the train, and the battery powering the load is another 50% of the total battery included in the train.
Of course, the above-mentioned values are not limited to the above-mentioned examples, and other implementations are also possible.
As a preferred embodiment, the train includes a plurality of storage batteries, and N storage batteries are one storage battery pack, N being an integer not less than 1;
causing the battery to power the traction motor through the traction converter, comprising:
when a storage battery power supply instruction is received, the first storage battery pack supplies power to the traction motor through the traction converter, and when the storage battery power supply instruction is received next time, the storage battery pack different from the first storage battery pack supplies power to the traction motor through the traction converter.
In addition, it is also considered that when a plurality of storage batteries are included in the train and each time a storage battery is used only in one part, if the same part is used each time, the service life of the part of storage batteries with more times of use will be lower than that of storage batteries with fewer times of use, resulting in different service lives of storage batteries in the same batch in the train.
Therefore, in the application, each N of the plurality of storage batteries is divided into one storage battery pack, and after each storage battery pack receives a storage battery power supply instruction, the storage battery pack which is different from the last storage battery pack is used for supplying power to the traction motor of the train, so that the storage batteries are used uniformly, and the service lives of all the storage batteries are kept relatively uniform.
As a preferred embodiment, the traction converter comprises a rectifying module, an inverting module, an auxiliary inverter, a charger, a first contactor K1, a second contactor K2, a third contactor K3 and a fourth contactor K4;
the first end of the rectifying module is connected with the output end of the traction transformer through a first contactor K1, the second end of the rectifying module is connected with the power supply end of the traction motor through an inversion module, is connected with the second end of the isolating switch through a second contactor K2 and is connected with the first end of the auxiliary inverter through a third contactor K3, the second end of the auxiliary inverter is connected with the input end of the charger, and the output end of the charger is connected with the third end of the isolating switch through a fourth contactor K4;
the first end and the second end of control pantograph decline, main circuit breaker disconnection and isolator are connected, make the battery pass through traction converter and supply power for traction motor, include:
the pantograph is controlled to descend, the main circuit breaker is opened, the first end and the second end of the isolating switch are connected, the first contactor K1 is opened, the second contactor K2 is closed, the third contactor K3 is opened and the fourth contactor K4 is opened, so that the storage battery supplies power to the traction motor through the isolating switch, the second contactor K2 and the inversion module;
the first end of control pantograph rise, main circuit breaker closure and isolator is connected with the third end, makes the electric wire netting pass through traction transformer and traction converter and for traction motor power supply and for battery charging, includes:
the pantograph is controlled to rise, the first end of the main circuit breaker is closed, the first end of the isolating switch is connected with the third end, the first contactor K1 is closed, the second contactor K2 is opened, the third contactor K3 is closed, the fourth contactor K4 is closed, the power grid supplies power for the traction motor through the first contactor K1, the rectifying module and the inversion module, and the storage battery is charged through the first contactor K1, the rectifying module, the third contactor K3, the auxiliary inverter, the charger, the fourth contactor K4 and the isolating switch.
Specifically, when the traction converter specifically includes a rectifying module, an inverting module, an auxiliary inverter, a charger, a first contactor K1, a second contactor K2, a third contactor K3, and a fourth contactor K4, the rectifying module is configured to rectify low-voltage AC output by the traction transformer into DC (rectify AC970V into DC (Direct Current) 1800V) through the first contactor K1, and the inverting module is configured to invert DC1800V into variable-voltage AC, so as to drive the traction motor to rotate, thereby implementing a normal traction function of the train. DC1800V is inverted into AC380V through a third contactor K3 and an auxiliary inverter, then rectified into DC110V through a charger, and the storage battery is charged through a fourth contactor K4. When the storage battery is used for supplying power, the storage battery drives the traction motor to rotate through the isolating switch, the second contactor K2 and the inversion module.
Therefore, when the power grid in the embodiment supplies power normally, the pantograph is controlled to rise, the main circuit breaker is closed, the first contactor K1 (traction converter) is closed, the third contactor K3 (traction converter) is closed, the fourth contactor K4 is closed, the second contactor K2 (traction converter) is opened, the first end and the third end of the isolating switch are connected, and the power grid supplies power for the traction motor and the storage battery. When the power supply of the power grid is abnormal and the storage battery is used for supplying power, the pantograph descends, the main circuit breaker is opened, the first contactor K1 (traction converter) is opened, the third contactor K3 (traction converter) is opened, the fourth contactor K4 is opened, the second contactor K2 (traction converter) is closed, and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power for the traction motor.
In this embodiment, the action logic of each device in the system is as follows:
pantograph lifting logic: the bow raising command and the power grid power supply command and the main circuit breaker are received to disconnect the first end and the third end of the isolating switch;
pantograph drop logic: (the bow-lowering command and the main breaker are disconnected) or receives the storage battery power supply command or the first end and the second end of the isolating switch are connected;
main breaker closing logic: the method comprises the steps that a main circuit breaker closing instruction and a power grid power supply instruction and pantograph lifting instruction are received, a first contactor K1 is disconnected, a second contactor K2 is disconnected, and the first end and the third end of an isolating switch are connected;
main breaker off logic: the first end and the second end of the closed or isolating switch of the second contactor K2 of the pantograph descent or which receives the storage battery power supply instruction or the pantograph descent or are connected;
first contactor K1 closing logic:
receiving a power grid power supply command and closing and disconnecting the first end and the third end of the isolating switch by a main breaker K2;
first contactor K1 off logic: the first end and the second end of the or disconnecting switch are connected by the first contactor K2 which is opened or closed or of the or second contactor K2 when the or receives a storage battery power supply instruction;
third contactor K3 closing logic: receiving a power grid power supply command and closing and opening a first end and a third end of an isolating switch by a first contactor K1 and a second contactor K2;
third contactor K3 off logic: receiving a storage battery power supply instruction or connecting a first end and a second end of a first contactor K1 disconnection or second contactor K2 closing or disconnecting switch;
fourth contactor K4 closing logic: receiving a power grid power supply command and disconnecting the first end and the third end of the isolating switch by the second contactor K2;
fourth contactor K4 off logic: the first end and the second end of the second contactor K2 closing or isolating switch are connected after receiving a storage battery power supply instruction or;
second contactor K2 closing logic: receiving a battery power command, a pantograph lowering, a main circuit breaker opening, a fourth contactor K4 opening, a first end and a second end of an isolating switch are connected
The first contactor K1 is opened and the third contactor K3 is opened;
second contactor K2 off logic: receiving a power grid power supply command or a pantograph lifting main circuit breaker closing or fourth contactor K4 closing or isolating switch, wherein the first end and the third end of the fourth contactor K4 closing or isolating switch are connected with a first contactor K1 closing or third contactor K3 closing;
logic to close the first and third terminals of the isolation switch: receiving a battery power supply command and opening a fourth contactor K4 and opening a pantograph descending and main circuit breaker;
logic to close the first and second ends of the isolation switch: and receiving a power grid power supply instruction or closing a fourth contactor K4, lifting a pantograph or closing a main breaker.
The "and" in all the above-described logics is the logic of the sum, and the "or" is the logic of the or.
Therefore, the reliability of the train can be controlled when the two power supply working conditions are switched.
Referring to fig. 2, fig. 2 is a block diagram of a power supply system for a train, where the system is applied to a processor in the train, the train further includes a pantograph, a main breaker, a traction transformer, a traction converter, a storage battery and an isolating switch, the first end of the isolating switch is connected with one end of the storage battery, the second end of the isolating switch is connected with one end of the traction converter, and the other end of the isolating switch is connected with the other end of the traction converter, and the system includes:
a determining unit 21, configured to determine whether the received power supply command is a battery power supply command or a grid power supply command;
the first control unit 22 is configured to control the pantograph to descend, the main breaker to open, and the first end and the second end of the isolating switch to connect if the power supply command is given to the storage battery, so that the storage battery supplies power to the traction motor through the traction converter;
and the second control unit 23 is used for controlling the pantograph to rise, the main circuit breaker to be closed and the first end of the isolating switch to be connected with the third end if the power supply command is given to the power grid, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter.
In order to solve the above technical problems, the present application further provides a train power supply system, and the description of the train power supply system refers to the above embodiment, which is not repeated herein.
Referring to fig. 3, fig. 3 is a block diagram of a power supply device for a train according to the present invention, where the power supply device includes:
a memory 31 for storing a computer program;
the processor 32 is configured to implement the steps of the train power supply method described above when executing the computer program.
In order to solve the above technical problems, the present application further provides a power supply device for a train, and the description of the power supply device for a train refers to the above embodiment, which is not repeated herein.
The train comprises the train power supply device, a pantograph, a main circuit breaker, a traction transformer and a traction converter which are sequentially connected from a power grid end to a traction motor end, a storage battery and a disconnecting switch, wherein the first end of the disconnecting switch is connected with one end of the storage battery, the second end of the disconnecting switch is connected with one end of the traction converter, and the other end of the disconnecting switch is connected with the other end of the traction converter.
Referring to fig. 4, fig. 4 is a block diagram of a train according to the present invention, and for other introduction of the train, reference is made to the above embodiment, and the disclosure is not repeated here.
As a preferred embodiment, the system further comprises a mode switching knob for sending a battery power supply instruction or a grid power supply instruction according to a user instruction.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. The utility model provides a train power supply method which characterized in that is applied to the treater in the train, the train still includes pantograph, main circuit breaker, traction transformer, traction current transformer that connect gradually from the electric wire netting end to traction motor end, still includes battery and isolator, isolator's first end with the one end of battery is connected, isolator's second end with one end of traction current transformer is connected, isolator's third end with the other end of traction current transformer is connected, the method includes:
determining whether the received power supply instruction is a storage battery power supply instruction or a power grid power supply instruction;
if the power supply instruction is given to the storage battery, the pantograph is controlled to descend, the main circuit breaker is disconnected, and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power to the traction motor through the traction converter;
if the power supply command is given to the power grid, controlling the pantograph to rise, closing the main circuit breaker and connecting the first end and the third end of the isolating switch, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter;
the traction converter comprises a rectifying module, an inversion module, an auxiliary inverter, a charger, a first contactor, a second contactor, a third contactor and a fourth contactor;
the first end of the rectifying module is connected with the output end of the traction transformer through the first contactor, the second end of the rectifying module is connected with the power supply end of the traction motor through the inversion module, is connected with the second end of the isolating switch through the second contactor and is connected with the first end of the auxiliary inverter through the third contactor, the second end of the auxiliary inverter is connected with the input end of the charger, and the output end of the charger is connected with the third end of the isolating switch through the fourth contactor;
the control the pantograph descends, the main circuit breaker is disconnected and the first end and the second end of the isolating switch are connected, so that the storage battery supplies power for the traction motor through the traction converter, and the control method comprises the following steps:
controlling the pantograph to descend, the main circuit breaker to be opened, the first end of the isolating switch to be connected with the second end, the first contactor to be opened, the second contactor to be closed, the third contactor to be opened and the fourth contactor to be opened, so that the storage battery supplies power to the traction motor through the isolating switch, the second contactor and the inversion module;
the control the pantograph rises, the main circuit breaker is closed and the first end and the third end of the isolating switch are connected, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter, and the control method comprises the following steps:
the pantograph is controlled to rise, the main circuit breaker is closed, the first end of the isolating switch is connected with a third end, the first contactor is closed, the second contactor is opened, the third contactor is closed, and the fourth contactor is closed, so that the power grid supplies power to the traction motor through the first contactor, the rectifying module and the inversion module, and charges the storage battery through the first contactor, the rectifying module, the third contactor, the auxiliary inverter, the charger, the fourth contactor and the isolating switch.
2. The method of power train of claim 1, wherein the train further comprises a load;
after determining whether the power supply command is a storage battery power supply command or a power grid power supply command, the method further comprises the following steps:
if the storage battery power supply instruction is given, the storage battery is controlled to supply power for the load;
and if the power supply command is given to the power grid, controlling the power grid to supply power to the load.
3. The train power supply method of claim 2 wherein controlling the battery to supply power to the load comprises:
and a control part of the storage battery supplies power for the traction motor through the traction converter, and another part of the storage battery is controlled to supply power for the load.
4. The train power supply method of claim 1 wherein determining whether the received power command is a battery power command or a grid power command comprises:
determining whether the mode switching knob is at a battery supply potential or a grid supply potential;
if the power supply command is at the power supply potential of the storage battery, determining that the power supply command is the power supply command of the storage battery;
and if the power supply command is at the power supply potential of the power grid, determining the power supply command as the power supply command of the power grid.
5. The train power supply method according to any one of claims 1 to 4, wherein the train includes a plurality of the storage batteries, and N of the storage batteries are one storage battery pack, N being an integer not less than 1;
causing the battery to power the traction motor through the traction converter, comprising:
when a storage battery power supply instruction is received, a first storage battery pack supplies power to the traction motor through the traction converter, and when the storage battery power supply instruction is received next time, a storage battery pack different from the first storage battery pack supplies power to the traction motor through the traction converter.
6. The utility model provides a train power supply system, its characterized in that is applied to the treater in the train, the train still includes pantograph, main circuit breaker, traction transformer, traction current transformer that connect gradually from the electric wire netting end to traction motor end, still includes battery and isolator, isolator's first end with the one end of battery is connected, isolator's second end with one end of traction current transformer is connected, isolator's the other end with traction current transformer's the other end is connected, the system includes:
the determining unit is used for determining whether the received power supply instruction is a storage battery power supply instruction or a power grid power supply instruction;
the first control unit is used for controlling the pantograph to descend, the main circuit breaker to be disconnected and the first end and the second end of the isolating switch to be connected if the power supply instruction is given to the storage battery, so that the storage battery supplies power to the traction motor through the traction converter;
the second control unit is used for controlling the pantograph to rise, the main circuit breaker to be closed and the first end of the isolating switch to be connected with the third end if the power supply instruction is given to the power grid, so that the power grid supplies power to the traction motor and charges the storage battery through the traction transformer and the traction converter;
the traction converter comprises a rectifying module, an inversion module, an auxiliary inverter, a charger, a first contactor, a second contactor, a third contactor and a fourth contactor;
the first end of the rectifying module is connected with the output end of the traction transformer through the first contactor, the second end of the rectifying module is connected with the power supply end of the traction motor through the inversion module, is connected with the second end of the isolating switch through the second contactor and is connected with the first end of the auxiliary inverter through the third contactor, the second end of the auxiliary inverter is connected with the input end of the charger, and the output end of the charger is connected with the third end of the isolating switch through the fourth contactor;
the first control unit is specifically configured to control the pantograph to descend, the main breaker to open, the first end of the isolating switch to be connected with the second end, the first contactor to open, the second contactor to close, the third contactor to open, and the fourth contactor to open, so that the storage battery supplies power to the traction motor through the isolating switch, the second contactor, and the inverter module;
the second control unit is specifically configured to control the pantograph to rise, the main circuit breaker to close and the first end of the isolating switch to be connected with a third end, the first contactor to close, the second contactor to open, the third contactor to close and the fourth contactor to close, so that the power grid supplies power to the traction motor through the first contactor, the rectifying module and the inversion module, and charges the storage battery through the first contactor, the rectifying module, the third contactor, the auxiliary inverter, the charger, the fourth contactor and the isolating switch.
7. A train power supply apparatus, comprising:
a memory for storing a computer program;
processor for implementing the steps of the train power supply method according to any of claims 1-5 when executing said computer program.
8. The train is characterized by comprising the train power supply device according to claim 7, and further comprising a pantograph, a main circuit breaker, a traction transformer, a traction converter, a storage battery and an isolating switch which are sequentially connected from a power grid end to a traction motor end, wherein a first end of the isolating switch is connected with one end of the storage battery, a second end of the isolating switch is connected with one end of the traction converter, and the other end of the isolating switch is connected with the other end of the traction converter;
the traction converter comprises a rectifying module, an inversion module, an auxiliary inverter, a charger, a first contactor, a second contactor, a third contactor and a fourth contactor;
the first end of the rectifying module is connected with the output end of the traction transformer through the first contactor, the second end of the rectifying module is connected with the power supply end of the traction motor through the inversion module, is connected with the second end of the isolating switch through the second contactor and is connected with the first end of the auxiliary inverter through the third contactor, the second end of the auxiliary inverter is connected with the input end of the charger, and the output end of the charger is connected with the third end of the isolating switch through the fourth contactor.
9. The train of claim 8, further comprising a mode switch knob for transmitting a battery power command or a grid power command based on a user command.
CN202111487053.7A 2021-12-07 2021-12-07 Train power supply method, system, device and train Active CN114013277B (en)

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Publication number Priority date Publication date Assignee Title
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CN109733420A (en) * 2019-01-04 2019-05-10 中车青岛四方机车车辆股份有限公司 A kind of train battery traction system, method and train
CN113043868A (en) * 2021-04-23 2021-06-29 株洲中车时代电气股份有限公司 Train traction control system and operation mode switching method
CN113200061A (en) * 2021-05-31 2021-08-03 中车青岛四方机车车辆股份有限公司 Storage battery traction control system, control method and train

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107571769A (en) * 2017-09-22 2018-01-12 湖南磁浮交通发展股份有限公司 A kind of magnetic-levitation train tractive system and magnetic-levitation train
CN109245284A (en) * 2018-10-17 2019-01-18 中车株洲电力机车有限公司 A kind of double-source controlled power supply system and double-source controlled electric engineering car
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