CN106291200B - Diesel locomotive traction converter cabinet debugging system - Google Patents
Diesel locomotive traction converter cabinet debugging system Download PDFInfo
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- CN106291200B CN106291200B CN201610815400.7A CN201610815400A CN106291200B CN 106291200 B CN106291200 B CN 106291200B CN 201610815400 A CN201610815400 A CN 201610815400A CN 106291200 B CN106291200 B CN 106291200B
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- 230000003137 locomotive effect Effects 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 208000037516 chromosome inversion disease Diseases 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 13
- 230000005284 excitation Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a diesel locomotive traction converter cabinet debugging system. Wherein, this system includes: the debugging equipment subsystem comprises a first frequency converter, a main generator, a traction converter cabinet, a traction motor, a second accompanying motor and at least one load; wherein, traction converter cabinet includes: the system comprises a rectifying and inverting unit, a traction control unit and an auxiliary control unit; the first frequency converter is used for carrying out frequency conversion treatment on three-phase alternating current of the power grid, then sending the three-phase alternating current to the first accompanying motor, dragging the main generator to rotate, and carrying out debugging test on the traction converter cabinet of the diesel locomotive after the three-phase alternating current generated by operation of the main generator is converted by corresponding components of the traction converter cabinet. According to the invention, the first frequency converter is used for replacing a diesel engine to be applied to the diesel locomotive traction converter cabinet debugging system, so that the test system is changed from an electromechanical hybrid system to an electrical system, and the complexity of the system is reduced.
Description
Technical Field
The invention relates to the field of control of diesel locomotives, in particular to a diesel locomotive traction converter cabinet debugging system.
Background
In order to ensure the normal operation of the diesel locomotive, the traction converter cabinet of the diesel locomotive needs to be debugged before the traction converter cabinet is used by the diesel locomotive.
In the prior art, the traction converter cabinet of the diesel locomotive is debugged by building a ground platform, and the ground platform is similar to a ground running vehicle, and only the components on the diesel locomotive are placed on the ground in sequence for testing. Comprising the following steps: the system comprises a diesel engine, a generator, a traction converter cabinet, a traction motor, a generator cooling fan, a traction motor cooling fan, a traction converter cabinet cooling water pump, a charger, a control system and the like. The traction converter cabinet comprises a traction control unit and an auxiliary control unit; the diesel engine drives the generator to operate, three-phase alternating current generated by the generator is input into the traction converter cabinet, after passing through the rectifying and inverting unit in the traction converter cabinet, one part of energy controls the traction motor through the traction control unit to perform motor characteristic test, and the other part of energy controls the resistor or the fan (such as a generator cooling fan, a traction motor cooling fan, a traction converter cabinet cooling water pump, a charger or a control system to supply power) of external equipment to operate through the auxiliary control unit to perform load test.
However, the debugging system of the existing traction converter cabinet of the diesel locomotive is complex.
Disclosure of Invention
The invention provides a diesel locomotive traction converter cabinet debugging system which is used for solving the problem that a diesel locomotive traction converter cabinet debugging system in the prior art is complex.
The invention provides a diesel locomotive traction converter cabinet debugging system, which comprises a debugging equipment subsystem;
the debugging device subsystem comprises:
the system comprises a first frequency converter, a first accompanying motor, a main generator, an excitation control system, a traction converter cabinet, a traction motor, a second accompanying motor and at least one load; wherein, traction converter cabinet includes: the system comprises a rectifying and inverting unit, a traction control unit and an auxiliary control unit;
the first frequency converter is used for carrying out frequency conversion treatment on three-phase alternating current of a power grid, then sending the three-phase alternating current to the first accompanying motor, dragging the main generator to rotate, enabling the main generator to operate, enabling the main generator to supply power to the traction converter cabinet through the action of the excitation control system, enabling the rectification and inversion unit of the traction converter cabinet to be used for carrying out rectification and inversion treatment on the three-phase alternating current provided by the main generator, enabling part of electric energy after rectification and inversion treatment to be provided for the traction control unit to control operation of the traction motor or the second accompanying motor, and enabling the other part of electric energy after rectification and inversion treatment to be provided for the auxiliary control unit to control operation of at least one load.
The commissioning device subsystem further comprises: a second frequency converter;
the diesel locomotive traction converter cabinet debugging system still includes: a console;
the console is in communication connection with the debugging equipment subsystem; the console is used for controlling the debugging equipment subsystem through communication connection.
The console is also provided with a debugging detection equipment interface, and the debugging detection equipment interface is used for connecting debugging detection equipment.
The console also includes a stop or start button to debug the device subsystem.
The console is in communication connection with the debugging device subsystem via a hard wire.
The console is in communication connection with the debugging device subsystem through a network.
The first frequency converter is an AC-DC uncontrolled rectifying frequency converter.
The second frequency converter is an AC-DC-AC frequency converter with four-quadrant inversion.
According to the diesel locomotive traction converter debugging system provided by the invention, the three-phase alternating current of the power grid is subjected to frequency conversion treatment through the first frequency converter and then is sent to the first accompanying motor, the main generator is dragged to rotate, the main generator operates, and then the main generator supplies power to the traction converter through the action of the excitation control system, after the three-phase alternating current is subjected to rectification and inversion treatment through the rectification and inversion units of the traction converter, one part of electric energy is provided for the traction control unit to control the operation of the traction motor or the second accompanying motor, and the other part of electric energy is provided for the auxiliary control unit to control the operation of at least one load.
The first frequency converter converts the three-phase alternating current in the power grid and then drives the main generator to rotate through the first accompanying motor, so that the diesel engine is replaced to be used as an energy source. The debugging system of the traction converter cabinet of the diesel locomotive is changed into an electrical system from an electromechanical hybrid system, so that the complexity of the system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a test flow of a traction motor traction characteristic debugging test and a corresponding resistance and fan load test and an energy flow direction in the test process of a traction converter cabinet debugging system embodiment of an internal combustion locomotive;
FIG. 2 is a test flow of a traction motor braking characteristic debugging test and a corresponding resistance and fan load test and an energy flow direction in the test process of an embodiment of a traction converter cabinet debugging system of an internal combustion locomotive of the present invention;
FIG. 3 is a schematic diagram of another implementation of a second exemplary debug test of a traction converter cabinet debug system of an internal combustion locomotive and the energy flow during the test;
fig. 4 is a schematic structural diagram of a control embodiment of a control console to a debugging device subsystem in a third debugging test process of an embodiment of a traction converter cabinet debugging system of an internal combustion locomotive.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The three-phase alternating current of the power grid is subjected to frequency conversion treatment by the frequency converter and then is dragged to rotate by the main generator through the first accompanying motor, and the main generator can be used as an energy source for a diesel locomotive traction converter cabinet debugging test under the action of the excitation control system, so that the diesel locomotive traction converter cabinet debugging system is changed into an electrical system from an electromechanical hybrid system, the whole diesel locomotive traction converter cabinet debugging system is simplified, and the full-electrical diesel locomotive traction converter cabinet debugging system is beneficial to control of an operation console, so that the operability of the whole diesel locomotive traction converter cabinet debugging system is improved.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Example 1
Fig. 1 and fig. 2 are schematic diagrams of a first embodiment of a traction converter cabinet debugging system of an internal combustion locomotive according to the present invention.
As shown in fig. 1: the invention provides a diesel locomotive traction converter cabinet debugging system, which comprises:
a commissioning device subsystem, the commissioning device subsystem comprising:
the system comprises a first frequency converter, a first accompanying motor, a main generator, an excitation control system, a traction converter cabinet, a traction motor, a second accompanying motor and at least one load; wherein, traction converter cabinet includes: the system comprises a rectifying and inverting unit, a traction control unit and an auxiliary control unit;
specifically, in this embodiment, the following embodiments are provided: the load may be a brake resistor cabinet and/or a fan system; the fan system includes: the device comprises a generator cooling fan, a traction motor cooling fan and a test accompanying motor cooling fan; the first frequency converter may be an ac-dc uncontrolled rectifier frequency converter.
Specifically, the first accompanying motor is used for dragging the main generator to rotate; the second accompanying motor is used for matching with the traction motor to complete the internal combustion engine traction converter cabinet debugging test. The first accompanying motor is coaxially connected with the main generator; the second accompanying motor is coaxially connected with the traction motor.
Alternatively, the traction inverter cabinet debugging test may be a traction motor traction characteristic debugging test of the traction control unit and a load test of the corresponding auxiliary control unit. The test flow and the energy flow direction in the test process are specifically shown in fig. 1:
the three-phase alternating current of the power grid enters the first accompanying motor after being subjected to frequency conversion through the first frequency converter and is dragged to run by the main generator by the first accompanying motor, wherein the first frequency converter and the first accompanying motor respectively play roles in frequency conversion and dragging the main generator to rotate. Under the action of the excitation control system, the main generator sends the electric energy with output characteristics into the traction converter cabinet system, and after the rectification and inversion unit performs rectification inversion, a part of the electric energy enters the traction control unit of the traction converter cabinet to drag the traction motor to operate. At this time, the traction motor is in a traction state, and the second accompanying motor is in a braking state. And at the same time, the other part of energy enters an auxiliary control unit of the traction converter cabinet to control the load to carry out a load test.
Optionally, the internal combustion locomotive traction converter cabinet debugging test can also be a traction motor braking characteristic debugging test of the traction control unit and a load test of the corresponding auxiliary control unit. As shown in fig. 2:
and part of electric energy after passing through the rectification and inversion unit of the traction converter cabinet enters the traction control unit to drag the second test accompanying motor to operate, and the traction motor is in a braking state at the moment. And at the same time, the other part of energy enters an auxiliary control unit of the traction converter cabinet to control the load to carry out a load test.
Optionally, the excitation control system is used to control the normal output of the main generator.
Optionally, the battery may be used to power a diesel locomotive traction converter cabinet debugging system.
Optionally, the charger is used for converting the high voltage electricity into a form of electric energy usable by the storage battery.
In the embodiment, the first frequency converter is used in the diesel locomotive traction converter cabinet debugging system instead of the diesel engine, so that the test system is changed from an electromechanical hybrid system to an electrical system, and the complexity of the system is reduced.
Example two
Fig. 3 is a schematic diagram of a second embodiment of the traction converter cabinet debugging system of the diesel locomotive of the present invention.
The second embodiment is based on the first embodiment, further, the debug apparatus subsystem further includes: a second frequency converter; the second frequency converter is an AC-DC-AC frequency converter with four-quadrant inversion, and the frequency converter with the four-quadrant function can enable energy to flow in two directions.
In fig. 3, the solid arrows represent the energy flow during the traction motor traction characteristic test, and the broken arrows represent the energy flow during the traction motor braking characteristic test.
Specifically, in this embodiment, the following embodiments are described: the bus voltage refers to the voltage on the line before entering the traction control unit and the auxiliary control unit in the traction converter cabinet.
As shown in fig. 3, the second frequency converter is connected between the power grid and the second accompanying motor. The second frequency converter plays a role in the debugging test of the traction converter cabinet of the internal combustion locomotive, and is as follows:
optionally, when the traction characteristic of the traction motor is tested, the second accompanying motor is in a braking state and generates energy, and the second frequency converter is used for feeding the electric energy generated by the second accompanying motor back to the power grid; thereby playing the roles of saving energy sources and improving the energy utilization rate;
optionally, when the braking characteristic of the traction motor is tested, the second frequency converter is used for carrying out frequency conversion treatment on three-phase alternating current of the power grid and then dragging the second accompanying motor to rotate, so that the second accompanying motor is in a traction state; therefore, the step of changing the positions of the second accompanying motor and the traction motor during the traction motor braking characteristic test is avoided, and the effect of simplifying the test step is achieved; in addition, when the bus voltage is stabilized at the braking control set value, the first frequency converter, the main generator and the excitation control system in the dotted line frame of fig. 3 can stop working, thereby further playing a role in saving quantity.
Alternatively, the brake resistor bank may be used to provide a circuit for traction control unit residual energy bleed when the traction motor braking characteristics are tested.
Alternatively, the charger may convert the remaining energy of the traction control unit into storable energy of the battery when the traction motor braking characteristics are tested.
The embodiment provides a test scheme that the second frequency converter is interposed between the power grid and the second accompanying motor, so that the method can be used for dragging the second accompanying motor to rotate after the frequency conversion treatment of the three-phase alternating current of the power grid, the second accompanying motor is enabled to operate under traction working conditions, and the step that the second accompanying motor and the traction motor are required to be changed in position during the traction motor braking characteristic test is avoided; the system can also be used for feeding the electric energy generated in the braking state of the second accompanying motor back to the power grid, and further improves the equipment utilization rate of the whole system, so that the system is environment-friendly and energy-saving. In addition, the brake rheostat for load test and the traction motor brake characteristic test can be used as a residual energy release providing loop of a traction control unit, so that the advantages of fully utilizing test equipment are reflected. When the braking characteristic test of the traction motor is carried out and the bus voltage is stabilized at the braking control set value, the first frequency converter, the main generator and the excitation control system in the dotted line frame of fig. 3 can stop working, so that the effect of saving quantity is further achieved.
Example III
Fig. 4 is a schematic diagram of a third embodiment of the traction converter cabinet debugging system of the diesel locomotive of the present invention. The control unit in fig. 4 includes: a traction control unit and an auxiliary control unit.
The third embodiment is based on the first embodiment or the second embodiment, and further includes: a console. As shown in fig. 4:
optionally, the console comprises an upper computer;
optionally, the upper computer is provided with a button for stopping or starting control of the equipment of the whole system, so that the input and output of each equipment can be cut off at any time, and the whole system can be controlled to stop working when unexpected dangerous situations occur, thereby playing a role in safety protection. Optionally, the upper computer can realize the on-off operation of the contactor; optionally, the upper computer can give a train control and management system (Train Control and Management System; abbreviated as TCMS) operation instruction, and control and debug the operation of related equipment in the equipment subsystem by controlling the TCMS; optionally, the upper computer may receive and monitor the data from the TCMS.
Optionally, the console further comprises a detection device monitoring area;
optionally, the monitoring area of the detection equipment is provided with a monitoring interface of a field camera, and meanwhile, the monitoring camera is arranged at a key part of the field of the test area, so that the debugging of test personnel and the running state of remote monitoring equipment are facilitated, and the situation of the test field can be known in real time; optionally, the monitoring area of the detection device is provided with a debugging detection device interface, and data signals of the detection devices such as an oscilloscope, a torque meter, a power analyzer, a temperature inspection meter and the like are transmitted to the console, so that debugging personnel can conveniently realize the functions of recording, analyzing and the like of the data signals. Optionally, the monitoring area of the detection device is also provided with a traction converter cabinet debugging program downloading and monitoring interface.
Optionally, the console is communicatively connected with the debugging device subsystem; the console is used for controlling the debugging equipment subsystem through communication connection.
Optionally, the communication connection includes: a hard-wired connection mode. Devices connected by hard-wired connections may be as shown in fig. 4, the hard-wired connections being represented by line arrows in the figure. The hard wire connecting needle is mainly responsible for high-voltage electric power input and output control and load throwing aiming at the operation of a high-speed circuit breaker and an alternating current-direct current contactor;
optionally, the communication connection further includes: network connection mode. Devices connected by hard-wired connections may be as shown in fig. 4, the hard-wired connections being indicated by open arrows in the figure. The system is mainly connected with a serial port through a multifunctional vehicle bus (Multifunction Vehicle Bus; MVB network for short), an Ethernet, a CAN communication network and a serial port communication, and is responsible for implementing control commands, monitoring data and recording various test parameters and data in the running process.
Optionally, the console realizes the control of hard-wire connection to the power grid power supply system, the first frequency converter, the second frequency converter, the fan system, the traction converter cabinet system, the charger, the excitation control system and other devices through a TCMS system (train control and management system): and cutting off or throwing equipment into a system through operating the control contactor, and performing interlocking logic processing and misoperation alarm prompting on the contactor.
Optionally, the console regulates the device of the commissioning device subsystem via a network communication connection; optionally, the first frequency converter and the second frequency converter are subjected to rotation speed adjustment through a serial network; optionally, an indication signal is provided for the operation of the traction converter cabinet, the charger and the excitation control unit through the Ethernet; optionally, key test data of the operation of the devices of the subsystem, such as bus voltage, traction motor torque, current, rotating speed, control power supply voltage and the like, are transmitted to the console through network communication connection, and are used for analyzing and monitoring whether the devices and the test data are normal.
The control console provided in this embodiment controls and monitors the operation of the diesel locomotive traction converter cabinet debugging test, and obtains data and display and downloading of a chart in the test, and as can be seen from this embodiment, the debugging system of the diesel locomotive traction converter cabinet is changed into an all-electric system by using the frequency converter to replace a diesel engine, a remote control console is built for the electric system through hard wire and network transmission, and the switching operation of different devices is controlled according to different test requirements, so that the flexibility and safety of the whole system and the maneuverability of the whole system are improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. An internal combustion locomotive traction converter cabinet debugging system, characterized by comprising:
a commissioning device subsystem, the commissioning device subsystem comprising:
the system comprises a first frequency converter, a first accompanying motor, a main generator, an excitation control system, a traction converter cabinet, a traction motor, a second accompanying motor and at least one load; wherein, traction converter cabinet includes: the system comprises a rectifying and inverting unit, a traction control unit and an auxiliary control unit;
the first frequency converter is used for carrying out frequency conversion treatment on three-phase alternating current of a power grid, then sending the three-phase alternating current to the first accompanying motor, dragging the main generator to rotate, enabling the main generator to operate, enabling the main generator to supply power to the traction converter cabinet through the action of the excitation control system, enabling the rectification and inversion unit of the traction converter cabinet to be used for carrying out rectification and inversion treatment on the three-phase alternating current provided by the main generator, enabling part of the rectified and inversion-treated electric energy to be provided for the traction control unit to control the traction motor or the second accompanying motor to operate, and enabling the other part of the rectified and inversion-treated electric energy to be provided for the auxiliary control unit to control the operation of the at least one load; wherein the load comprises a brake resistor cabinet and/or a fan system;
the debugging device subsystem further comprises: a second frequency converter;
when the traction motor is in a traction working condition, the second accompanying motor is in a braking state, and the second frequency converter is used for feeding electric energy generated by the second accompanying motor back to a power grid;
when the traction motor is in a braking working condition, the second test accompanying motor is in a traction state, and the second frequency converter is used for carrying out frequency conversion treatment on three-phase alternating current of the power grid and then dragging the second test accompanying motor to rotate; the brake resistor cabinet is used for providing a loop for residual energy release of the traction control unit.
2. The system of claim 1, further comprising: a console;
the console is in communication connection with the debugging equipment subsystem;
the console is used for controlling the debugging equipment subsystem through the communication connection.
3. The system according to claim 2, wherein the console is further provided with a commissioning detection device interface for connecting a commissioning detection device.
4. The system of claim 2, wherein the console further comprises a stop or start button to debug the device subsystem.
5. The system of claim 2, wherein the console is communicatively coupled to the commissioning device subsystem via a hard-wire.
6. The system of claim 2, wherein the console is communicatively coupled to the commissioning device subsystem via a network.
7. The system of claim 1, wherein the first frequency converter is an ac-to-dc uncontrolled rectifier frequency converter.
8. The system of claim 1, wherein the second frequency converter is an ac-dc-ac frequency converter comprising a four-quadrant inversion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815400.7A CN106291200B (en) | 2016-09-09 | 2016-09-09 | Diesel locomotive traction converter cabinet debugging system |
| PCT/CN2016/105663 WO2018045631A1 (en) | 2016-09-09 | 2016-11-14 | Debugging system for traction converter of internal combustion locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815400.7A CN106291200B (en) | 2016-09-09 | 2016-09-09 | Diesel locomotive traction converter cabinet debugging system |
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| CN106291200A CN106291200A (en) | 2017-01-04 |
| CN106291200B true CN106291200B (en) | 2024-02-20 |
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| CN201610815400.7A Active CN106291200B (en) | 2016-09-09 | 2016-09-09 | Diesel locomotive traction converter cabinet debugging system |
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| CN (1) | CN106291200B (en) |
| WO (1) | WO2018045631A1 (en) |
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| CN106932213A (en) * | 2017-04-28 | 2017-07-07 | 上海轨道交通检测技术有限公司 | The energy recycle device and method of a kind of train rolling rig |
| CN106945564A (en) * | 2017-05-08 | 2017-07-14 | 中车资阳机车有限公司 | A kind of train of storage battery power supply, train network control system |
| CN110967650B (en) * | 2019-12-06 | 2024-04-02 | 江西洪都航空工业集团有限责任公司 | Alternating current power supply test bed |
| CN111555251A (en) * | 2020-06-01 | 2020-08-18 | 中车青岛四方机车车辆股份有限公司 | System and method for cutting off charger |
| CN114283659B (en) * | 2021-12-30 | 2024-11-05 | 广东安朴电力技术有限公司 | Direct current transmission test prototype |
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| CN106291200A (en) | 2017-01-04 |
| WO2018045631A1 (en) | 2018-03-15 |
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