AU2021302172B2 - Main circuit topology structure of hybrid locomotive with constant speed generator set, and power supply method - Google Patents

Main circuit topology structure of hybrid locomotive with constant speed generator set, and power supply method Download PDF

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Publication number
AU2021302172B2
AU2021302172B2 AU2021302172A AU2021302172A AU2021302172B2 AU 2021302172 B2 AU2021302172 B2 AU 2021302172B2 AU 2021302172 A AU2021302172 A AU 2021302172A AU 2021302172 A AU2021302172 A AU 2021302172A AU 2021302172 B2 AU2021302172 B2 AU 2021302172B2
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Australia
Prior art keywords
generator set
power
battery pack
diesel generator
power supply
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AU2021302172A1 (en
Inventor
Huanzhang CHEN
Boyong DENG
Kexin FENG
Xiaoyuan MA
Yong Wang
Bo Yang
Deping Yang
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CRRC Ziyang Co Ltd
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CRRC Ziyang Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C3/00—Electric locomotives or railcars
    • B61C3/02—Electric locomotives or railcars with electric accumulators
    • 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
    • B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
    • 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/24—Using the vehicle's propulsion converter for charging
    • 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
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C1/00—Steam locomotives or railcars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C15/00—Maintaining or augmenting the starting or braking power by auxiliary devices and measures; Preventing wheel slippage; Controlling distribution of tractive effort between driving wheels
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

Disclosed in the present invention are a main circuit topology structure of a hybrid locomotive with a constant speed generator set, and a power supply method, which belong to the technical field of new energy shunting locomotives. The main circuit topology structure comprises a load, and further comprises a power battery pack, a diesel generator set and a ground power source. The load comprises an auxiliary system, a traction motor and a storage battery, the power battery pack is connected to an intermediate direct current loop, the intermediate direct current loop comprises a pre-charging circuit, a traction converter and a storage battery charger, and the other end of the pre-charging circuit is connected to the traction converter and the storage battery charger, and the traction converter and the storage battery charger are respectively connected to the traction motor and the storage battery. The main circuit topology structure further comprises a four-quadrant rectification module, one end of the four-quadrant rectification module being connected to the intermediate direct current loop, and the other end thereof being connected to the diesel generator set, the ground power source and the auxiliary system, so as to achieve the purpose of satisfying the requirements of hybrid control of locomotive power batteries and the diesel generator set.

Description

MAIN CIRCUIT TOPOLOGY STRUCTURE OF HYBRID LOCOMOTIVE WITH CONSTANT SPEED GENERATOR SET, AND POWER SUPPLY METHOD TECHNICAL FIELD
The present invention belongs to the technical field of new-energy shunting locomotives,
and specifically relates to a main circuit topology structure of hybrid locomotive with constant
speed generator set, and power supply method.
BACKGROUND
The shunting locomotive is the basic power for shunting work, and its technical
requirements are different from those of the lead locomotive for general traction trains. Since it is
necessary to start the traction or push the train set within a short distance, it does not require a
higher design speed, but requires a certain amount of tractive force. As it needs to move forward
or back frequently, it requires good lookout conditions. As it is mainly working in the station, it
needs to pass through a curve with a small radius, so it requires that the rigid wheelbase of the
locomotive be small. Due to frequent startup and shutdown, the locomotive is required to operate
flexibly and have good braking performance. As the locomotive is often operated at night, the
head and tail lamps are required to have good brightness; in addition, it is also required to
facilitate the shunters to get on and off safely.
The existing shunting locomotives are basically electric or hydraulic shunting locomotives
based on diesel engines. The locomotives have high noise and energy consumption, and difficult
maintenance, and the electric shunting locomotive has complex circuit topology. Some new
energy hybrid shunting locomotives are based on special diesel engines and main generators,
with high cost, difficult matching and complex structure.
SUMMARY OF THE INVENTION
Given this, in order to solve the above problems in the prior art, the present invention is to
provide a main circuit topology structure of hybrid locomotive with constant speed generator set,
and power supply method to meet the needs of hybrid control of locomotive power battery and
diesel generator set.
The technical solution of the present invention is: a main circuit topology structure of hybrid locomotive with constant speed generator set, comprising a load, and further comprising a power battery pack, a diesel generator set and a ground power supply, wherein the load comprises an auxiliary system, a traction motor and a battery; the power battery pack is connected with an intermediate DC circuit, and the intermediate DC circuit comprises a pre-charge circuit, a traction converter and a battery charger; the other end of the pre-charge circuit is connected with the traction converter and the battery charger respectively, both of which are connected to the traction motor and the battery respectively; further comprising a four-quadrant rectifier module, wherein one end of the four-quadrant rectifier module is connected to the intermediate DC circuit, and the other end is connected to the diesel generator set, the ground power supply and the auxiliary system.
Further, the load is powered by the power battery pack separately, the diesel generator set or
the ground power supply, or is powered by the power battery pack and the diesel generator set in
a hybrid way, so as to switch different working modes and realize different functions.
Further, the four-quadrant rectifier module comprises a four-quadrant rectifier and an LCL
filter circuit connected therewith; the four-quadrant rectifier is connected with the pre-charge
circuit, and the LCL filter circuit is connected with the diesel generator set and the ground power
supply respectively. The four-quadrant rectifier has powerful functions and can meet the
functional requirements of different power supplies.
Further, the battery is a 11OV battery, and the 11OV battery is connected with a 11OV DC
power supply interface, as an external 11OV DC power supply.
Further, the power battery pack comprises at least two groups of power batteries, which are
connected in parallel, in order to provide sufficient DC power supply through multiple groups of
power batteries.
Further, the diesel generator set outputs AC38OV/5OHz AC power supply for traction or
auxiliary system.
Further, the auxiliary system comprises at least one traction motor blower and an air
conditioning/domestic power port to realize the auxiliary functions of the locomotive.
The present invention further provides a power supply method for the main circuit topology
structure of hybrid locomotive with constant speed generator set, and the method is applied to
the main circuit topology structure of hybrid locomotive with constant speed generator set, comprising the following steps: supplying power by the power battery pack separately, supplying power to the intermediate DC circuit during traction, and/or supplying power to the auxiliary system via the four-quadrant rectifier module; during regenerative braking, charging the power battery pack by the intermediate DC circuit, and/or supplying power to the auxiliary system via the four-quadrant rectifier module; supplying power by the diesel generator set separately, supplying power to the auxiliary system by the diesel generator set, and/or supplying power to the intermediate DC circuit via the four-quadrant rectifier module, with regenerative braking prohibited; supplying power by the power battery pack and the diesel generator set in a hybrid way, and supplying power by the diesel generator set and the power battery pack in a hybrid way through the four-quadrant rectifier module working in a PWM rectifier mode; supplying power by the ground power supply separately, supplying power to the auxiliary system by the ground power supply, and/or charging the power battery pack after being rectified by the four-quadrant rectifier module. Further, when the power battery pack and the diesel generator set are used as hybrid power supply, if the locomotive is in a low handle position, the power battery pack gives priority to power supply until the SOC of the power battery pack is less than 30%, and then the diesel generator set is started; the diesel generator set passes through the four-quadrant rectifier module, and then supplies power to the intermediate DC circuit and charges the power battery pack until the SOC of the power battery pack is higher than 95%; at this time, the diesel generator set is shut down; if the locomotive is in a high handle position, the diesel generator set passes through the four-quadrant rectifier module, and then supplies power to the intermediate DC circuit together with the power battery pack in a hybrid way. The beneficial effects of the present invention are as follows: 1. The main circuit topology structure of hybrid locomotive with constant speed generator set and the power supply method are used, and the functional diversity of the four-quadrant rectifier module is used to simplify the main circuit topology, reduce one auxiliary frequency converter, and simplify the configuration. The four-quadrant rectifier module can realize two functions of boost rectifier and inverter, meeting the hybrid control needs of the locomotive power battery and the diesel generator set. At the same time, it can be used as a frequency converter to provide AC power to the auxiliary system, and can also serve as a charger to charge the power battery pack. The circuit is simple in overall structure and perfect in functions.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is the schematic diagram of the overall structure of the main circuit topology
structure of hybrid locomotive with constant speed generator set provided by the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the application are described below and examples of the embodiments
are shown in the drawings, in which the same or similar reference symbols always indicate same
or similar modules, or modules with same or similar functions. The exemplary embodiment
described by the following figures is to explain the application, but not a limit of the application.
On the contrary, the embodiments of the present application include all changes, modifications
and equivalents falling within the spirit and connotation of the appended claims.
Embodiment 1
As shown in Fig. 1, this embodiment provides a main circuit topology structure of hybrid
locomotive with constant speed generator set, and the main function of the locomotive main
circuit is to: convert the DC power of the power battery pack and the AC power of the diesel
generator set, control the operation of the AC asynchronous traction motor, charge the power
battery pack, realize the locomotive braking energy feedback and control the operation of the
traction blower; at the same time, AC38OV/220V AC power and DC 11OV DC power are
provided to the outside. The specific design is as follows:
It mainly comprises an auxiliary system, a traction motor, a battery, a power battery pack, a
diesel generator set and a ground power supply, wherein the diesel generator set is used to
provide AC38V/5Hz AC power supply; the power battery pack is used for providing DC
power supply, preferably, the power battery pack comprises two groups of power batteries, which
are connected in parallel and connected to the intermediate DC circuit; The ground power supply
is used for providing AC380V/5OHz AC power supply. However, the auxiliary system comprises at least one traction motor blower and an air conditioning/domestic power port, in this embodiment, including two traction motors and one air conditioning/domestic power port; the battery is a 110V battery, and the 110V battery is connected with a 11OV DC power supply interface to provide 11OV DC power to the outside of the locomotive; the traction motor provides power for locomotive movement and realizes locomotive dispatching.
The power battery pack is connected with the intermediate DC circuit, and the intermediate
DC circuit comprises a pre-charge circuit, a traction converter and a battery charger; the other
end of the pre-charge circuit is connected with the traction converter and the battery charger
respectively, both of which are connected to the traction motor and the battery respectively; the
function of the pre-charge circuit is that there is an intermediate circuit capacitor on the rectifier
and rectifier feedback modules. If the power module is connected, and the capacitor of the power
module is provided on the DC busbar, the capacitor charge current is a logarithmic curve
characteristic. If the starting current is not limited, it will be very large, and the capacitor can be
destroyed immediately. Therefore, when SLM unit is put into operation, the time sequence is as
follows: first putting in the pre-charge power supply (connected to the main power supply),
giving the closing command, putting in the internal pre-charge contactor, charging the capacitor
bank with the power supply through the pre-charge resistor, putting in the main power supply
and cutting off the pre-charge contactor when the voltage reaches; the pre-charge circuit
generally comprises two ways: one is the main relay, and the other is the auxiliary relay with
high impedance and resistor R in series. During the pre-charge process, the auxiliary relay and
resistor R are connected first, and the capacitor bank is charged by the pre-charge resistor. When
the voltage reaches, the circuit where the main relay is located is put into operation, and the
auxiliary relay is cut off. The above is the basic working principle. The use of the pre-charge
circuit is the prior art, which will not be repeated here. The above traction converter converts the
intermediate DC into AC through space vector control to control the action of traction motor. The
battery charger is used to charge the 11OV battery and then supply power to the control circuit of
the locomotive.
The topology further comprises a four-quadrant rectifier module. One end of the
four-quadrant rectifier module is connected to the intermediate DC circuit, and the other end is
connected to the diesel generator set, the ground power supply and the auxiliary system, that is, the diesel generator set and the ground power supply are both connected with the four-quadrant rectifier module, and the diesel generator set and the ground power supply are both connected with the auxiliary system. the four-quadrant rectifier module comprises a four-quadrant rectifier and an LCL filter circuit connected therewith, and the LCL filter circuit is a supporting module of the four-quadrant rectifier, which plays the role of filtering and electromagnetic compatibility. the four-quadrant rectifier is connected with the pre-charge circuit, and connected to the diesel generator set and the ground power supply by the LCL filter circuit respectively. The main circuit topology structure of hybrid locomotive with constant speed generator set provided by this embodiment mainly includes four following working modes: supplying power by the power battery pack separately, the diesel generator set or the ground power supply, or supplying power by the power battery pack and the diesel generator set in a hybrid way. In different modes, the four-quadrant rectifier module has different roles, as follows: When the power is supplied by the diesel generator set separately, the four-quadrant rectifier module plays a role of PWM rectifier, supplying the AC power after boosting to the intermediate DC circuit; When the power is supplied by the diesel generator set and the power battery pack in a hybrid way, the four-quadrant rectifier module plays a role of PWM rectifier. The diesel generator set and the power battery pack are used for hybrid output through accurate control, in order to increase the locomotive output power and improve the traction capacity; When the power battery pack is charged by the ground power supply or diesel generator set, the four-quadrant rectifier module serves as a charger to control the constant-current charge of the power battery pack; When the power is supplied by the power battery separately, the four-quadrant rectifier module serves as a frequency converter, supplying the intermediate DC after inversion to the auxiliary system through sine wave filtering. Embodiment 2 Based on the circuit topology in embodiment 1, this embodiment also provides a power supply method to realize different functions under various working modes of the locomotive. The method comprises the following steps: The working mode of the locomotive is switched through the control command to realize separate power supply by the power battery pack, separate power supply by the diesel generator set or separate power supply by the ground power supply, or hybrid power supply by the power battery pack and the diesel generator set. Different functions can be achieved under different working modes. The power supply methods under each mode are as follows:
1 The load is separately powered by the power battery pack (the ground power supply and
the diesel generator set do not work): When the locomotive is in the traction state, the power
battery pack supplies power to the intermediate DC circuit, and the intermediate DC circuit
supplies power to the traction converter and controls the operation of the traction motor through
the traction converter. At the same time, the DC power of the power battery pack supplies power
to the auxiliary system through the four-quadrant rectifier module. At this time, the four-quadrant
rectifier module serves as a frequency converter, supplying the intermediate DC power after
inversion to the auxiliary system through sine wave filtering;
When the locomotive is in the regenerative braking state, the traction motor generates
electricity and charges the power battery pack through the traction converter. At the same time,
the traction motor generates electricity and supplies power to the intermediate DC circuit, in
order to supply power to the auxiliary system through the four-quadrant rectifier module to meet
the power consumption of the auxiliary system.
@ The power is separately supplied by the diesel generator set (the ground power supply
and the power battery pack do not work): AC38OV/5OHz AC generated by the diesel generator
set directly supplies power to the auxiliary system. At the same time, AC38V/5OHz AC supplies
power to the intermediate DC circuit after being rectified and boosted by the four-quadrant
rectifier module, and supplies power to the traction motor through the pre-charge circuit and the
traction converter; Under the working condition of separate power supply by the diesel generator
set, the locomotive is prohibited from regenerative braking, that is, the current generated by
traction motor will not be fed back to the intermediate DC circuit.
@ The power is supplied by the power battery pack and the diesel generator set. At this
time, the working state of the four-quadrant rectifier module is switched to the PWM rectifier
mode, and the power is supplied by the diesel generator set and the power battery pack in a
hybrid way, as follows:
When the power battery pack and the diesel generator set are used as hybrid power supply, if the locomotive is in a low handle position, the power battery pack gives priority to power supply until the SOC of the power battery pack is less than 30%, and then the diesel generator set is started; through accurate control, the diesel generator set passes through the four-quadrant rectifier module, and then supplies power to the intermediate DC circuit and charges the power battery pack; at this time, the AC power generated by the diesel generator set can also supply power to the auxiliary system directly; with charging to the power battery pack until the SOC of the power battery pack is higher than 95%, the diesel generator set is shut down; at this time, the four-quadrant rectifier of the four-quadrant rectifier module is in the PWM rectifier mode; If the locomotive is in a high handle position, the diesel generator set passes through the four-quadrant rectifier module, and then supplies power to the intermediate DC circuit together with the power battery pack in a hybrid way through accurate control, in order to increase the locomotive output power and improve the traction capacity; at this time, the AC power generated by the diesel generator set, diesel generator can also supply power to the auxiliary system directly, and the working state of the four-quadrant rectifier in the four-quadrant rectifier module is also in the PWM rectifier mode. @ The power is supplied by the ground power supply separately, and the ground power supply directly supplies power to the auxiliary system, and/or the power battery pack is charged after being rectified by the four-quadrant rectifier module. The charge current is input from the display screen of the locomotive, and the charging is started. The diesel generator set is prohibited from starting and loading. The 380V/5OHz AC power from the ground power supply is used to charge the power battery after being rectified by the four-quadrant rectifier module. The four-quadrant rectifier module operates in the constant-current mode, which can accurately control the charge current of the power battery. At the same time, the ground power supply directly supplies power to the auxiliary system. It should be noted that, in the description of the present application, the terms "first", "second", etc. are only used for description, but cannot be understood to indicate or imply relative importance. In addition, in the description of the present application, "multiple" means at least two, unless otherwise specified, unless otherwise specified. Any process or method description in the flow diagram or otherwise described herein can be understood to represent a module, segment or part of a code including one or more executable instructions for implementing the steps of a specific logic function or process, and the scope of the preferred implementation method of the present application includes other implementations, which may not be in the order shown or discussed. It should be understood by those skilled in the art of the embodiments of the present application that functions are performed in a substantially simultaneous manner or in a reverse order according to the functions involved. It should be understood that, all parts of the present application can be realized by hardware, software, firmware or combination thereof. In the above embodiments, multiple steps or methods may be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit with a logic gate circuit for realizing a logic function on a data signal, an application-specific integrated circuit with a suitable combined logic gate circuit, a programmable gate array (PGA), field programmable gate array (FPGA), etc. Those of ordinary skill in the art can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment. In addition, all functional units in each embodiment of the present application can be integrated in one processing module, or all units can also physically exist independently, or two or over units are integrated in one module. The module can be integrated in the form of hardware, and can also be integrated in the form of software function module. If the module is integrated in the form of software function module and used as an independent product for sale or use, it can also be stored in a computer-readable storage medium. The storage medium mentioned above can be read only memory, disk or optical disk, etc. In the Description, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. are described to refer to that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the description, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Further, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
Although the embodiments of the present application have been illustrated and described, it
can be understood that the above embodiments are exemplary and should not be construed as
limitations to the present application. Changes, modifications, replacements and variations
within the scope of the present application can be made to these embodiments by those of
ordinary skill in the art.

Claims (9)

1. A main circuit topology structure of hybrid locomotive with constant speed generator
set, comprising a load, characterized in further comprising a power battery pack, a diesel
generator set and a ground power supply, wherein the load comprises an auxiliary system, a
traction motor and a battery; the power battery pack is connected with an intermediate DC circuit,
and the intermediate DC circuit comprises a pre-charge circuit, a traction converter and a battery
charger; the other end of the pre-charge circuit is connected with the traction converter and the
battery charger respectively, both of which are connected to the traction motor and the battery
respectively;
further comprising a four-quadrant rectifier module, wherein one end of the four-quadrant
rectifier module is connected to the intermediate DC circuit, and the other end is connected to the
diesel generator set, the ground power supply and the auxiliary system.
2. The main circuit topology structure of hybrid locomotive with constant speed generator
set according to claim 1, wherein the load is powered by the power battery pack separately, the
diesel generator set or the ground power supply, or is powered by the power battery pack and the
diesel generator set in a hybrid way.
3. The main circuit topology structure of hybrid locomotive with constant speed generator
set according to claim 1, wherein the four-quadrant rectifier module comprises a four-quadrant
rectifier and an LCL filter circuit connected therewith; the four-quadrant rectifier is connected
with the pre-charge circuit, and the LCL filter circuit is connected with the diesel generator set
and the ground power supply respectively.
4. The main circuit topology structure of hybrid locomotive with constant speed generator
set according to claim 1, wherein the battery is a11OV battery, and the11OV battery is connected
with a 11OV DC power supply interface.
5. The main circuit topology structure of hybrid locomotive with constant speed generator
set according to claim 1, wherein the power battery pack comprises at least two groups of power
batteries, which are connected in parallel.
6. The main circuit topology structure of hybrid locomotive with constant speed generator
set according to claim 1, wherein the diesel generator set outputs AC380V/5OHz AC power supply. 7. The main circuit topology structure of hybrid locomotive with constant speed generator set according to claim 1, wherein the auxiliary system comprises at least one traction motor blower and an air conditioning/domestic power port.
8. A power supply method for the main circuit topology structure of hybrid locomotive
with constant speed generator set, based on the main circuit topology structure of hybrid
locomotive with constant speed generator set according to any of claims 1-7, comprising the
following steps:
supplying power by the power battery pack separately, supplying power to the intermediate
DC circuit during traction, and/or supplying power to the auxiliary system via the four-quadrant
rectifier module; during regenerative braking, charging the power battery pack by the
intermediate DC circuit, and/or supplying power to the auxiliary system via the four-quadrant
rectifier module;
supplying power by the diesel generator set separately, supplying power to the auxiliary
system by the diesel generator set, and/or supplying power to the intermediate DC circuit via the
four-quadrant rectifier module, with regenerative braking prohibited;
supplying power by the power battery pack and the diesel generator set in a hybrid way, and
supplying power by the diesel generator set and the power battery pack in a hybrid way through
the four-quadrant rectifier module working in a PWM rectifier mode;
supplying power by the ground power supply separately, supplying power to the auxiliary
system by the ground power supply, and/or charging the power battery pack after being rectified
by the four-quadrant rectifier module.
9. The power supply method for the main circuit topology structure of hybrid locomotive
with constant speed generator set according to claim 8, wherein, when the power battery pack
and the diesel generator set are used as hybrid power supply, if the locomotive is in a low handle
position, the power battery pack gives priority to power supply until the SOC of the power
battery pack is less than 30%, and then the diesel generator set is started; the diesel generator set
passes through the four-quadrant rectifier module, and then supplies power to the intermediate
DC circuit and charges the power battery pack until the SOC of the power battery pack is higher
than 95%; at this time, the diesel generator set is shut down; if the locomotive is in a high handle position, the diesel generator set passes through the four-quadrant rectifier module, and then supplies power to the intermediate DC circuit together with the power battery pack in a hybrid way.
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CN104836511A (en) * 2015-02-17 2015-08-12 中国铁道科学研究院 Traction inverter main circuit
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