CN110212432B - Motor train unit inversion comprehensive power supply vehicle - Google Patents
Motor train unit inversion comprehensive power supply vehicle Download PDFInfo
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- CN110212432B CN110212432B CN201910465548.6A CN201910465548A CN110212432B CN 110212432 B CN110212432 B CN 110212432B CN 201910465548 A CN201910465548 A CN 201910465548A CN 110212432 B CN110212432 B CN 110212432B
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- 101100346177 Arabidopsis thaliana MORC5 gene Proteins 0.000 claims abstract description 18
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- 101100168604 Candida albicans (strain SC5314 / ATCC MYA-2876) CRH12 gene Proteins 0.000 claims abstract description 11
- 101100168607 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) UTR2 gene Proteins 0.000 claims abstract description 11
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
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Abstract
The invention discloses an inversion comprehensive power supply vehicle of a motor train unit, which is characterized in that: the power supply device cabinet body is arranged on the bearing mobile battery car; the power supply device cabinet body is internally provided with a low-voltage power distribution system, an inverter power supply device, a CPU main control system, a touch screen measurement and control system, a switching and interlocking system and an input and output connecting cable comprising a connector; the invention takes one power supply of CRH1, CRH2, CRH3, CRH5 and CR standard motor train units which are mainly operated on line at present as an input power supply, converts the input power supply into other types of power supply required by each vehicle type through intelligent control and switching technology, and sends the types of power supply required by each other vehicle type to the vehicle to be overhauled through a special connector to finish the short-grouping auxiliary ground power supply of one motor train unit, thereby effectively reducing the material cost and construction cost of a power socket box and a connecting cable in a motor train section or a motor train unit inspection library and providing an economic and applicable motor train unit power supply scheme for the motor train section or the motor train.
Description
Technical Field
The invention belongs to the field of temporary emergency power supply of motor train units, and particularly relates to an inversion comprehensive power supply vehicle for motor train units, which is used for temporary emergency comprehensive power supply of motor train units of CRH1, CRH2, CRH3, CRH5 and CR standard motor train units in motor train operation stations.
Background
After the running task of the motor train unit is completed by high-speed running, the motor train unit needs to be driven into a motor train section or a motor train inspection warehouse for maintenance. Because the high-speed passenger train manufacturing factories are more, the types of the vehicle types are various, and the current main on-line operation motor train unit comprises CRH1 type, CRH2 type, CRH3 type, CRH5 type, CR mark and other vehicle types, wherein the vehicle types are divided into long groups (16 carriages) and short groups (8 carriages), the power supply parameters, the power supply connection socket types, the power supply point positions and the configuration quantity of various socket boxes of various high-speed passenger trains are different, and the convenience of the preparation and maintenance of the high-speed passenger trains in an inspection warehouse is restricted to a certain extent.
At present, most motor train units are provided in a checking warehouse by utilizing motor train units ground power supply devices, and the ground power supply devices are used for temporarily supplying power to the motor train units to be checked when a contact net above the inside of the warehouse is in a non-electricity temporary emergency mode, and the current emergency power supply mode has a certain limitation.
Limitations manifest as:
1. the system has huge composition and high investment cost. At present, the vehicle types are various, and the long grouping and the short grouping are divided, so that the power supply parameters, the power supply connection socket types and the power supply point positions of various high-speed passenger trains are different, the system composition is huge, and the investment cost is high.
2. The construction difficulty is high and the construction period is long. The various socket boxes are required to be installed below each maintenance track bridge according to actual requirements, pipe fittings and the like are required to be pre-buried in advance during construction and installation, main cables and control cables are laid to the various socket boxes through the power supply box, the construction and installation difficulty is high, the construction period is long, and the engineering cost is high.
3. The utilization rate is lower. The ground power supply device of the motor train unit for current emergency power supply is only used as a standby emergency power supply after construction and construction are completed, the utilization rate is low, and a certain degree of resource waste is caused.
Disclosure of Invention
Aiming at least one of the defects or the improvement demands of the prior art, the invention provides an inversion comprehensive power supply vehicle of a motor train unit, which takes one power supply source of CRH1, CRH2, CRH3, CRH5 and CR marked motor train units which are mainly operated on line at present as an input power source, converts the input power source into other power supply source types required by each vehicle type through intelligent control and switching technology, and sends the power supply source to a vehicle to be overhauled through a special connector to finish the short-grouping auxiliary ground power supply of the motor train unit, thereby effectively reducing the material cost and construction cost of a power socket box and a connecting cable in a motor train section or a motor train inspection warehouse, and providing an economic and applicable power supply scheme of the motor train unit for the motor train section or the motor train.
In order to achieve the above object, according to one aspect of the present invention, there is provided an inversion integrated power supply vehicle for a motor train unit, which is composed of a load-bearing mobile battery car and a power supply device cabinet, wherein the power supply device cabinet is disposed on the load-bearing mobile battery car;
the power supply device cabinet is internally provided with a low-voltage power distribution system, an inverter power supply device, a CPU main control system, a touch screen measurement and control system, a switching and interlocking system, an input connecting cable and an output connecting cable which comprise connectors;
the input connection cable is used for taking one power supply of different single-phase alternating current power supplies of various motor train units including CRH1 type, CRH2 type, CRH3 type, CRH5 type and CR mark as an input power supply and connecting the power supply to a low-voltage distribution system in the power supply device cabinet;
the low-voltage distribution system is used for introducing an external single-phase alternating current power supply and providing short circuit, overcurrent, overvoltage and undervoltage, overheat protection of elements and fault alarm;
the inverter power supply device comprises an input rectifying and filtering system and a high-power inverter system; the input rectifying and filtering system rectifies and filters the power passing through the low-voltage power distribution system to form a stable direct-current power supply; the high-power inversion system inverts an introduced direct current power supply into a three-phase standard sine wave alternating current power supply, and supplies power to short-grouping auxiliary ground of motor train units of other types except the type serving as an input power supply through the output connecting cable;
the CPU main control system monitors the running state of the inverter power supply device in real time, dynamically adjusts the output voltage according to the acquired data, and ensures that the power supply outputs stable constant-voltage constant-frequency sine pulse width modulation voltage;
the touch screen measurement and control system is used for displaying data acquired by the CPU main control system and providing an instruction input end;
the switching and interlocking system provides mutual switching for short grouping auxiliary ground power supply of motor train units of other types except for the type of motor train unit serving as an input power supply, and auxiliary contacts of a breaker are mutually interlocked, so that the switching and interlocking system can not be used simultaneously, and safe power supply of motor train units of all types is realized.
Preferably, a single-phase AC400V alternating current power supply output by a CRH2 type power socket box is used as an input power supply of the inversion comprehensive power supply vehicle of the motor train unit, and short-grouping auxiliary ground power is supplied for motor train units of other vehicle types including CRH1 type, CRH3 type, CRH5 type and CR standard motor train units.
Preferably, the low-voltage distribution system is used for introducing an external single-phase AC400V alternating current power supply, a circuit breaker is used, double-layer protection is carried out through a fast fuse and a current sensor, and main loop distribution is completed; the circuit breaker is provided with an overcurrent, overvoltage and short-circuit protection circuit.
Preferably, the input rectifying and filtering system of the inverter power supply device adopts a single-phase bridge rectifying circuit to rectify, rectifies a single-phase Alternating Current (AC) 400V input power supply into a direct current power supply, and then filters the direct current power supply into a stable direct current power supply.
Preferably, the high-power inverter system of the inverter power supply device comprises three-phase inverter main circuits, and each phase of inverter main circuit is symmetrical and consistent and sequentially comprises an input filter circuit, an inverter bridge circuit and an output shaping filter circuit.
Preferably, the input filter circuit is composed of four capacitors which are connected in series and then in parallel, and is used for filtering ripple waves of input voltage, and when the load changes, the direct-current voltage is stabilized; and the four capacitors are all high-voltage electrolytic capacitors used for instantaneously providing large current output, so that the busbar voltage is ensured not to be pulled down by the instantaneous large current.
Preferably, the inversion bridge circuit is a single-phase bridge type inversion main circuit consisting of 6 groups of high-power IGBT modules, and adopts a full-bridge IGBT inversion circuit with an H-bridge topological structure, each phase can be independently loaded, and the full-bridge type inversion bridge circuit is suitable for three-phase complete unbalanced loads; the SPWM drive circuit unit generates drive waveforms, and drives each IGBT correspondingly according to a preset time sequence;
meanwhile, the protection sensor comprising over-temperature protection and anti-impact protection is used for protection, sampling signals of all the protection sensors are sent to the CPU main control system, and the CPU main control system judges whether the current operation is normal or not.
Preferably, the output shaping filter circuit changes the SPWM waveform output by the inversion bridge circuit into a pure sine wave under the modulation of the CPU main control system, and outputs a stable three-phase Alternating Current (AC) 400V voltage, so that the damage of harmonic waves to electric equipment of the motor train unit is avoided.
Preferably, the CPU main control system monitors the running state of the inverter power supply device in real time to generate a control signal and an SPWM sine wave modulation signal, realizes process adjustment, data acquisition, conversion and data communication, and has the functions of input and output control, parameter setting and fault protection.
Preferably, the input connection cable is provided with YC2XB sockets;
the output connecting cables are in two groups, and one group adopts a KC20A plug and is used for connecting a CRH1 type motor train unit and a CRH5 type motor train unit; another group adopts 75016 type plug for connecting CRH3 type and CR standard type motor train unit.
The above-described preferred technical features may be combined with each other as long as they do not collide with each other.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
1. the invention relates to an inversion comprehensive power supply vehicle for a motor train unit, which takes one of CRH1, CRH2, CRH3, CRH5 and CR which are mainly operated on line at present as an input power supply, converts the input power supply into other power supply types required by each vehicle type through intelligent control and switching technology, and sends the power supply types to a vehicle to be overhauled through a special connector to finish the power supply of a short-grouping auxiliary ground of the motor train unit, thereby effectively reducing the material cost and construction cost of a power socket box and a connecting cable in a motor train section or a motor train inspection library and providing an economic and applicable power supply scheme for the motor train unit for the motor train section or the motor train.
2. The intelligent control and SPWM modulation control technology is adopted, and the single-phase AC400V power supply is converted into the three-phase AC400V power supply with low distortion and pure waveform by the AC-DC-AC technology means, and the intelligent control and SPWM modulation control system has the characteristics of strong carrying capacity and good load compatibility.
3. Besides meeting the power supply requirement, the device also has the specificity of the applicable environment, has the characteristics of high efficiency, light weight, small volume, simple operation, convenient movement and the like, can provide an economic and applicable emergency power supply scheme for the motor train unit of the motor train section or the motor train, and effectively reduces the fund investment of the emergency power supply for the motor train section or the motor train unit of the motor train station for repair and overhaul.
4. Each vehicle type power supply unit has switching and interlocking functions, and safe power supply of each motor train unit is realized.
5. The touch screen is used as a display terminal, the full Chinese display and the man-machine interface are friendly, the operation information and the fault information of the device can be displayed in real time, and the device has the functions of parameter display, storage and inquiry.
6. The device is provided with a data transfer interface, and has expansibility and upgradeability so as to adapt to the requirements of system upgrade and management.
7. The system is designed with perfect protection and alarm functions of overvoltage, overcurrent, short circuit, overheat and the like, and ensures the safe operation of the system.
Drawings
FIG. 1 is a schematic diagram of a load-bearing mobile battery car of an inversion integrated power supply car of a motor train unit;
FIG. 2 is a left side view of a power supply unit cabinet of the motor train unit inversion comprehensive power supply vehicle of the present invention;
FIG. 3 is a right side view of a power supply unit cabinet of the motor train unit inversion comprehensive power supply vehicle of the present invention;
FIG. 4 is a rear view of the power unit cabinet of the motor train unit inverter integrated power supply vehicle of the present invention;
FIG. 5 is a plan view of a power unit cabinet of the motor train unit inverter integrated power supply vehicle of the present invention;
FIG. 6 is a schematic diagram of a main circuit of an inverter power supply device of the motor train unit inverter integrated power supply vehicle of the present invention;
FIG. 7 is an enlarged view of a portion of the input rectifying and filtering system of FIG. 6;
FIG. 8 is an enlarged view of a portion of the high power inverter system of FIG. 6;
FIG. 9 is an enlarged view of a portion of the inverter bridge circuit of FIG. 6;
FIG. 10 is an enlarged view of a portion of the output shaping filter circuit of FIG. 6;
fig. 11 is a control flow chart of the motor train unit inverter integrated power supply vehicle of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other. The present invention will be described in further detail with reference to the following embodiments.
As a preferred embodiment of the invention, as shown in fig. 1-11, the invention provides an inversion comprehensive power supply vehicle of a motor train unit, which consists of a bearing movable electric vehicle (shown in fig. 1) and a power supply device cabinet (shown in fig. 2-5), wherein the power supply device cabinet is arranged on the bearing movable electric vehicle. In order to adapt to on-site maintenance, the inversion comprehensive power supply vehicle of the motor train unit adopts a movable structure, takes green and environment-friendly battery cars as bearing equipment, is convenient to move freely in a motor train inspection warehouse, and can quickly reach an operation site.
The power supply device cabinet is internally provided with a low-voltage power distribution system, an inverter power supply device, a CPU main control system, a touch screen measurement and control system, a switching and interlocking system, an input connecting cable and an output connecting cable which comprise connectors.
The input connection cable is used for taking one of different single-phase alternating current power supplies of various motor train units including CRH1 type, CRH2 type, CRH3 type, CRH5 type and CR mark as an input power supply and accessing the low-voltage distribution system in the power supply device cabinet body.
In the embodiment, a single-phase AC400V alternating current power supply output by a CRH2 type power socket box is used as an input power supply of the inversion comprehensive power supply vehicle of the motor train unit, and short-grouping auxiliary ground power supply of motor train units of other vehicle types including CRH1 type, CRH3 type, CRH5 type and CR standard motor train units is used.
The input connection cable is provided with a YC2XB socket; the output connecting cables are in two groups, and one group adopts a KC20A plug and is used for connecting a CRH1 type motor train unit and a CRH5 type motor train unit; another group adopts 75016 type plug for connecting CRH3 type and CR standard type motor train unit. The CRH1, the CRH3, the CRH5 and the CR motor train unit can be covered by adopting 2 groups of output connecting cables to supply power, so that the economic cost of the connecting cables is greatly reduced, the ground power supply volume and the weight of the vehicle-mounted multifunctional motor train unit are reduced, and the convenience of the inversion comprehensive power supply vehicle of the motor train is effectively improved.
The low-voltage distribution system is mainly used for introducing an external single-phase AC400V alternating current power supply, 1 high-performance circuit breaker (with overcurrent, overvoltage and short-circuit protection) is used, double-layer protection is carried out through various protection circuits such as a fast fuse, a current sensor and the like, main loop distribution is completed, the precision of the transformer is 0.5 level, and the low-voltage distribution system is provided with voltage and current detection and various protection circuits and has the functions of short circuit, overcurrent, overvoltage and undervoltage, element overheat protection and alarm.
As shown in fig. 6, the inverter power supply device includes an input rectifying and filtering system and a high-power inverter system.
The input rectifying and filtering system adopts a single-phase bridge type rectifying circuit to rectify, rectifies a single-phase Alternating Current (AC) 400V input power supply into a direct current power supply, and filters the direct current power supply into a stable direct current power supply. The input rectifying and filtering principle diagram is shown in fig. 7.
As shown in fig. 8, the high-power inverter system is composed of three-phase inverter main circuits, and each phase of inverter main circuit is completely symmetrical and consistent and sequentially comprises an input filter circuit, an inverter bridge circuit (taking IGBT1-IGBT6 as an example) and an output shaping filter circuit.
The input filter circuit consists of four capacitors which are connected in series and then in parallel, and has the main function of filtering ripple waves of input voltage, and when a load changes, the direct-current voltage is stable. Here, the output current is very large at the moment of starting, considering the load-carrying inductive load. Therefore, with the high-voltage electrolytic capacitor, a large current output can be instantaneously provided. Thereby ensuring that the bus voltage is not pulled down by the instantaneous high current.
As shown in fig. 9, the inverter bridge circuit is a core of the power supply device, and a single-phase bridge type inverter main circuit formed by 6 groups of high-power english-slush IGBT modules adopts a full-bridge IGBT inverter circuit with an H-bridge topology structure, each phase can be independently loaded, and the inverter bridge circuit adapts to three-phase completely unbalanced load, and the unbalance degree can be within 3%; the SPWM drive circuit unit generates drive waveforms, and the IGBTs are correspondingly driven according to a certain time sequence. Meanwhile, the perfect protection unit performs protection, such as over-temperature protection, anti-impact protection and the like. And sending the sampling signals of the protection sensors to a CPU main control system, and judging whether the current operation is normal or not by the CPU main control system.
The IGBT has good high-speed switch, high-voltage and high-current working characteristics; the voltage type driving is adopted, only small control power is needed, the working efficiency is high (low loss and low heating value), the driving circuit is miniaturized, the reliability is high, and the voltage type driving circuit is particularly suitable for the working environment of an inverter power supply. The invention selects an imported brand product, which consists of 6 groups of Inlet-Fei-Ling FF450R12KT4, each IGBT module can reach 450A, rated output current 227A under the long-term use condition of a power supply can be ensured, the short-group auxiliary ground power supply of one motor train unit of CRH1, CRH3 and CRH5 and a marked CR type motor train unit is satisfied, the on-board electric equipment is finished, and the storage battery is charged through a power supply loop.
By adopting the circuit design, the motor car inversion comprehensive power supply car can meet the requirement of wide-range voltage input, and ensures safe and stable use.
As shown in fig. 10, in order to ensure that the power supply device can output a stable three-phase AC400V voltage, so as to avoid damage of harmonic waves to electric equipment of the motor train unit, an output shaping filter circuit is added at the front end of each phase of output AC400V voltage, and mainly the SPWM waveform output by the inverter system is changed into a pure sine wave, so that damage of harmonic waves to the electric equipment is reduced, the service life of the electric equipment is prolonged, and the output energy utilization rate of the inverter power supply is improved.
The CPU main control system is a core part of the control system, monitors the running state of the inverter power supply device in real time, generates related control signals and SPWM sine wave modulation signals, realizes process adjustment, data acquisition, conversion and data communication, and has the functions of input and output control, parameter setting, fault protection and the like. The main protection functions are as follows: overvoltage protection, undervoltage protection, overcurrent protection, overload protection, overheat protection, short-circuit protection, and has the functions of power-on identification, emergency stop control and the like. Aiming at the inductive load properties of motor train unit air conditioning system equipment and the like, the device adopts SPWM sine wave modulation and PID process control, thereby achieving the purposes of frequency modulation, voltage regulation and quick response output.
As shown in fig. 11, the control flow is: after passing through the low-voltage distribution system, the single-phase alternating current 400V is converted into direct current through a rectifier bridge, and the direct current is filtered again through a resistor and a filter capacitor and then is loaded on an IGBT power switch device. The single-phase alternating current input power supply is transformed by the power supply board to provide power for the control circuit CPU and the IGBT driving board. The drive board sends an on/off pulse signal to the IGBT, so that the IGBT is correctly turned on and off according to a set program under the control of the inversion control circuit. The detection circuit monitors output parameters of all parts in real time and feeds back the output parameters to the CPU main control system, the CPU main control system dynamically adjusts output voltage according to the acquired data according to a program, ensures that the power supply outputs stable constant voltage constant frequency sine pulse width modulation voltage, and then the constant voltage constant frequency sine pulse width modulation voltage is converted into a pure 50Hz and AC400V sine wave alternating current power supply through the filter circuit, so that the power supply can meet the requirements of CRH1, CRH3 and CRH5 and the auxiliary ground power supply for marking one short grouping of the motor train unit, the on-board electric equipment is finished, and the storage battery is charged through the power supply loop. The system is designed with the protection functions of input overvoltage, undervoltage, output overvoltage, overcurrent, short circuit, overheat and the like, so that the safe operation of the system is ensured.
The touch screen measurement and control system is used for displaying data acquired by the CPU main control system and providing an instruction input end. The touch screen is used as a display terminal, the full Chinese display and the man-machine interface are friendly, the operation information and the fault information of the device can be displayed in real time, and the device has the functions of parameter display, storage and inquiry.
The switching and interlocking system provides mutual switching for short grouping auxiliary ground power supply of motor train units of other types except for the motor train unit of other types serving as an input power supply, and CRH1, CRH3, CRH5 and CR power supply units are output and interlocked and cannot be used simultaneously, so that safe power supply of motor train units of all types is realized. The auxiliary contacts of the circuit breaker are mutually interlocked, so that the interlocking is stable and reliable, and when one of the power supplies power, the other 3 power supplies cannot be connected, so that the interlocking purpose is achieved.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a EMUs contravariant synthesizes power supply car which characterized in that: the power supply device comprises a bearing mobile battery car and a power supply device cabinet body, wherein the power supply device cabinet body is arranged on the bearing mobile battery car;
the power supply device cabinet is internally provided with a low-voltage power distribution system, an inverter power supply device, a CPU main control system, a touch screen measurement and control system, a switching and interlocking system, an input connecting cable and an output connecting cable which comprise connectors;
the input connection cable is used for taking one power supply of different single-phase alternating current power supplies of various motor train units including CRH1 type, CRH2 type, CRH3 type, CRH5 type and CR mark as an input power supply and connecting the power supply to a low-voltage distribution system in the power supply device cabinet;
the low-voltage distribution system is used for introducing an external single-phase alternating current power supply and providing short circuit, overcurrent, overvoltage and undervoltage, overheat protection of elements and fault alarm;
the inverter power supply device comprises an input rectifying and filtering system and a high-power inverter system; the input rectifying and filtering system adopts a single-phase bridge type rectifying circuit to rectify, rectifies a single-phase Alternating Current (AC) 400V input power supply into a direct current power supply, and filters the direct current power supply into a stable direct current power supply; the high-power inversion system consists of three-phase inversion main circuits, each phase of inversion main circuit is symmetrical and consistent, each phase of inversion main circuit sequentially comprises an input filter circuit, an inversion bridge circuit and an output shaping filter circuit, an introduced direct current power supply is inverted into a three-phase standard sine wave alternating current power supply, and short marshalling auxiliary ground power is supplied to motor train units of other types except the vehicle type serving as the input power supply through the output connecting cable;
the inverter bridge circuit is a single-phase bridge type inverter main circuit consisting of 6 groups of high-power IGBT modules, adopts a full-bridge IGBT inverter circuit with an H-bridge topological structure, and adopts voltage type driving, each phase can be independently loaded, and the inverter bridge circuit is suitable for three-phase complete unbalanced load, and the unbalanced degree of the unbalanced load is within 3%; the SPWM drive circuit unit generates drive waveforms, and drives each IGBT correspondingly according to a preset time sequence;
meanwhile, the protection sensor with over-temperature protection and anti-impact protection is used for protection, sampling signals of all the protection sensors are sent to the CPU main control system, and the CPU main control system judges whether the current operation is normal or not;
the CPU main control system monitors the running state of the inverter power supply device in real time to generate a control signal and an SPWM sine wave modulation signal, adopts SPWM sine wave modulation and PID process control to realize process adjustment, data acquisition, conversion and data communication, and has the functions of input and output control, parameter setting and fault protection;
the touch screen measurement and control system is used for displaying data acquired by the CPU main control system and providing an instruction input end;
the switching and interlocking system provides mutual switching for short grouping auxiliary ground power supply of motor train units of other types except for the type of motor train unit serving as an input power supply, and auxiliary contacts of a breaker are mutually interlocked, so that the switching and interlocking system can not be used simultaneously, and safe power supply of motor train units of all types is realized.
2. The multiple-unit inversion comprehensive power supply vehicle as claimed in claim 1, wherein:
the single-phase AC400V alternating current power supply output by the CRH2 type power socket box is used as the input power supply of the inversion comprehensive power supply vehicle of the motor train unit, and the power supply vehicle is used for supplying power to the short grouping auxiliary ground of motor train units of other vehicle types including CRH1 type, CRH3 type, CRH5 type and CR standard motor train units.
3. The motor train unit inverter integrated power supply vehicle as claimed in claim 2, wherein:
the low-voltage distribution system is used for introducing an external single-phase AC400V alternating current power supply, a circuit breaker is used, double-layer protection is carried out through a fast fuse and a current sensor, and main loop distribution is completed; the circuit breaker is provided with an overcurrent, overvoltage and short-circuit protection circuit.
4. The multiple-unit inversion comprehensive power supply vehicle as claimed in claim 1, wherein:
the input filter circuit consists of four capacitors which are connected in series and then in parallel, and is used for filtering ripple waves of input voltage, and when the load changes, the direct-current voltage is stable; and the four capacitors are all high-voltage electrolytic capacitors used for instantaneously providing large current output, so that the busbar voltage is ensured not to be pulled down by the instantaneous large current.
5. The multiple-unit inversion comprehensive power supply vehicle as claimed in claim 1, wherein:
the output shaping filter circuit changes the SPWM waveform output by the inversion bridge circuit into a pure sine wave under the modulation of the CPU main control system, outputs a stable three-phase Alternating Current (AC) 400V voltage, and avoids damage of harmonic waves to electric equipment of the motor train unit.
6. The motor train unit inverter integrated power supply vehicle as claimed in claim 2, wherein:
the input connection cable is provided with a YC2XB socket;
the output connecting cables are in two groups, and one group adopts a KC20A plug and is used for connecting a CRH1 type motor train unit and a CRH5 type motor train unit; another group adopts 75016 type plug for connecting CRH3 type and CR standard type motor train unit.
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