CN110299850B

CN110299850B - High-power traction auxiliary converter

Info

Publication number: CN110299850B
Application number: CN201910576385.9A
Authority: CN
Inventors: 裴冰; 赵娜; 李秋玲; 王雷; 田尚川
Original assignee: CRRC Xian Yonge Electric Co Ltd
Current assignee: CRRC Xian Yonge Electric Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2021-04-20
Anticipated expiration: 2039-06-28
Also published as: CN110299850A

Abstract

The invention belongs to the technical field of converters, and relates to a high-power traction auxiliary converter, which comprises: the intelligent power supply comprises a cabinet body, wherein four groups of traction converters, two groups of auxiliary converters, a control unit and a cooling unit are arranged in the cabinet body; two groups of traction converters and one group of auxiliary converters are respectively arranged on two sides of the cooling unit; the control unit is positioned at the upper right part of the cabinet body, and the cooling unit simultaneously cools the traction converter and the auxiliary converter; the four groups of traction converters and the two groups of auxiliary converters are integrated, are used for a power-concentrated motor train unit of a certain electric locomotive company and are used for providing a proper power supply for a locomotive traction motor and an auxiliary load; the converter adopts a modularized and symmetrical design, and has the advantages of small volume, light weight, sealing design, high redundancy design and high integration degree; the assembly and the production are simple and efficient, the light-weight and high-integration design requirements of the whole locomotive can be met, the structural space is greatly saved, the integration level is improved, and the electrical interference is reduced.

Description

High-power traction auxiliary converter

Technical Field

The invention belongs to the technical field of converters, relates to a traction auxiliary converter, and particularly relates to a high-power traction auxiliary converter.

Background

The traction auxiliary converter is an important part of an alternating current transmission electric locomotive, and has the function of converting alternating current in a power frequency power grid into alternating current which is suitable for the operation requirement of an alternating current motor and has variable frequency through frequency conversion and voltage transformation control, thereby completing the traction/braking performance of the electric locomotive and the performance of supplying power to an auxiliary load. The electrical design and the cabinet body layout design of the transmission system relate to the performance realization and the stability of the whole transmission system.

The converter of the existing electric locomotive is mostly a traction converter or a traction auxiliary converter with less power and less than three groups, and the converter devices have low integration degree, low power density and large overall dimension, thereby causing the problems of large occupied space and incapability of improving the power density.

In order to realize the control function of the whole vehicle, two or three converters are required to be installed under the same power level, so that more installation space is occupied during installation, and the compactness of spatial arrangement is not facilitated; and the integration level is not high, the maintenance is not convenient, the weight is increased, and the light weight of the whole vehicle is not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a high-power traction auxiliary converter which adopts a modularized and symmetrical design and has the advantages of small volume, light weight, high integration degree, simple and efficient seal design, assembly and production.

In order to achieve the purpose, the invention provides the following technical scheme:

a high power traction auxiliary converter comprising: the intelligent cabinet comprises a cabinet body, wherein various devices are arranged in the cabinet body, and the devices comprise four groups of traction converters, two groups of auxiliary converters, a control unit and a cooling unit; two groups of traction converters and one group of auxiliary converters are respectively arranged on two sides of the cooling unit; the control unit is located at the upper right side of the cabinet body, and the cooling unit cools the traction converter and the auxiliary converter at the same time.

Further, the device is including setting up power module and the electric capacity subassembly in the cabinet body, low-voltage apparatus subassembly, switching apparatus subassembly, sensor module, cooling module, copper bar subassembly, box subassembly, low-voltage line subassembly, high-pressure auxiliary assembly and door subassembly.

Further, the power module and capacitor assembly comprises eight traction power modules, two auxiliary inverter power modules and eight intermediate support capacitors; every four traction power modules and the middle support capacitor are arranged in a vertical and horizontal symmetrical mode and connected through the composite busbar.

Further, power module and capacitor assembly still include the twelve secondary filter electric capacity that sets up in cabinet body rear side, and every six secondary filter electric capacity are a set of, and through female parallel connection of arranging of complex between the adjacent two sets of secondary filter electric capacity, female row of complex is connected with power module and capacitor assembly through high tension cable.

Further, the low-voltage electrical apparatus assembly is arranged below the control unit.

Further, the switching device assembly includes,

the main contactors are arranged on the left lower side of the cabinet body and are respectively connected with the traction power module and the wall bushing through copper bars and large wires;

the isolation switches are arranged at the upper part of the cabinet body and are connected with the power module and the capacitor assembly through copper bars, and the isolation switches are also connected with the secondary filter capacitor through copper bars and a large line;

the four pre-charging contactors are arranged on the right side of the main contactor;

the two groups of pre-charging resistors are arranged behind the main contactor and arranged at the top of the cabinet body;

the chopper resistor is placed in a single area at the top of the cabinet body;

the slow discharge resistor is fixed on the electric water-resistant cold plate through a bolt, the back of the slow discharge resistor is coated with heat-conducting silicone grease, and heat exchange heat dissipation is carried out through cooling liquid in the electric water-resistant cold plate.

Furthermore, the sensor assembly comprises four input current sensors, eight output current sensors and six auxiliary output current sensors which are arranged at an electrical interface at the bottom of the cabinet body, the sensor assembly is fixed on a copper bar through bolts, and the copper bar is installed on a wall bushing; the two chopping current sensors and the six voltage sensors are all arranged in a high-voltage area in the middle of the cabinet body; two pressure sensors and two temperature sensors are installed at the water inlet of the water cooling pipeline.

Further, the cooling assembly comprises a cooling system which comprises a water cooling pipeline, a temperature control device, a rubber hose, a quick water connector, a temperature sensor, a pressure sensor, a water inlet stop valve and a water outlet stop valve.

Further, the converter further includes: the converter high-voltage interface is arranged at the right lower part of the cabinet; the converter low-voltage interface is arranged on the right side of the cabinet; and the water-cooling pipe interface is arranged on the right side wall of the cabinet body and comprises a water inlet and a water outlet.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the four groups of traction converters and the two groups of auxiliary converters are integrated, are used for a power-concentrated motor train unit of an electric locomotive company and are used for providing a proper power supply for a locomotive traction motor and an auxiliary load; the converter adopts a modularized and symmetrical design, and has small volume, light weight and high integration degree; designing a seal; the assembly and the production are simple and efficient, the light-weight and high-integration design requirements of the whole locomotive can be met, the structural space is greatly saved, the integration level is improved, and the electrical interference is reduced.

In addition, the invention also carries out air circulation and cooling in the cabinet through the design of additionally arranging the environmental control device in the cabinet body; the chopper resistor with high heating ratio is placed in the independent space at the top end of the cabinet body, so that damage of the heating value to other elements is reduced as much as possible.

Drawings

Fig. 1 is a schematic diagram of the general layout of a high-power auxiliary converter provided by the invention;

fig. 2 is a diagram of the main components of a high-power auxiliary converter provided by the present invention;

fig. 3 is a first schematic layout diagram of the main components of the high-power auxiliary converter provided by the invention;

fig. 4 is a layout diagram of the main components of the high-power auxiliary converter provided by the invention;

fig. 5 is a layout schematic diagram of main components of the high-power auxiliary converter provided by the invention;

fig. 6 is a schematic structural diagram of the air flow direction of the high-power auxiliary converter provided by the invention.

Wherein: 1. a cabinet body; 2. a traction converter; 3. an auxiliary converter; 4. a control unit; 5. a cooling unit; 6. a power module and a capacitive component; 7. a low voltage electrical component; 8. switching electrical components; 9. a sensor assembly; 10. a cooling assembly; 11. a copper bar assembly; 12. a case assembly; 13. a traction power module; 14. an auxiliary inversion power module; 15. a middle support capacitor; 16. a composite busbar; 17. a secondary filter capacitor; 18. a main contactor; 19. an isolating switch; 20. a pre-charging contactor; 21. a pre-charge resistor; 22. a chopper resistor; 23. a slow discharge resistor; 24. an input current sensor; 25. an output current sensor; 26. an auxiliary output current sensor; 27. a chopped current sensor; 28. a voltage sensor; 29. a pressure sensor; 30. a temperature sensor; 31. a water-cooling pipeline; 32. a water inlet; 33. a temperature control device; 34. a converter high voltage interface; 35. a converter low voltage interface; 36. and (7) a water outlet.

Detailed Description

The invention is described in further detail below with reference to the following figures and examples:

example 1:

referring to fig. 1, the present invention provides a high power traction auxiliary converter, including: the intelligent power supply comprises a cabinet body 1, wherein four groups of traction converters 2, two groups of auxiliary converters 3, a control unit 4 and a cooling unit 5 are arranged in the cabinet body 1; two groups of traction converters 2 and one group of auxiliary converters 3 are respectively arranged on two sides of the cooling unit 5; the control unit 4 is located at the upper right of the cabinet 1, and the cooling unit 5 cools the traction converter 2 and the auxiliary converter 3 at the same time.

Further, including setting up power module and the capacitor assembly 6 in the cabinet body, low-voltage apparatus subassembly 7, switching apparatus subassembly 8, sensor module 9, cooling module 10, copper bar subassembly 11, box subassembly 12, the low-voltage line subassembly, high-pressure auxiliary assembly and door subassembly in the cabinet body.

Further, the power module and capacitor assembly 6 comprises eight traction power modules 13, two auxiliary inverter power modules 14 and eight intermediate support capacitors 15; every auxiliary inverter power module 14 and middle support capacitor 15 are adjacently arranged and are connected through a composite busbar 16, every four traction power modules 13 and middle support capacitors 15 are arranged in a vertically and horizontally symmetrical mode and are connected through the composite busbar 16, therefore, the water cooling pipeline 31 can be easily arranged, the power modules can be conveniently installed and maintained, the connection is convenient, the overall dimension of the composite busbar 16 can be reduced as far as possible, and the cost is reduced.

Further, the power module and the capacitor assembly 6 further comprise twelve secondary filter capacitors 17 arranged on the rear side of the cabinet body, every six secondary filter capacitors 17 are in one group, two adjacent groups of secondary filter capacitors 17 are connected in parallel through a composite busbar 16, and the composite busbar 16 is connected with the power module and the capacitor assembly 6 through a high-voltage cable. Because the converter size is less, and spatial layout is limited, twelve secondary filter capacitors 17 are all placed at the cabinet body 1 rear side, also adopt compound female arranging 16 to connect, have saved the space, make the overall arrangement more reasonable.

Further, low-voltage apparatus subassembly 7 sets up in the below of control unit 4, and control unit 4 is that two Traction Control Units (TCU) place in the upper right side of cabinet body 1, and low-voltage apparatus part is placed in the below of TCU, all keeps apart with the high-voltage area, reducible interference, concentrated wiring. The TCU is a front outlet, and a binding frame is arranged at the front end of the TCU, so that the wiring harness can be bound, and the attractiveness of wiring is ensured.

Further, the switching device assembly 8 comprises,

the main contactor 18 is arranged at the lower left of the cabinet body 1, and the main contactor 18 is respectively connected with the traction power module 13 and the wall bushing through copper bars and large wires;

the isolation switches 19 are arranged at the upper part of the cabinet body 1, the isolation switches 19 are connected with the power module and the capacitor assembly 6 through copper bars, and the isolation switches 19 are also connected with the secondary filter capacitor 17 through copper bars and a large line;

four precharge contactors 20, the precharge contactors 20 being disposed on the right side of the main contactor 18;

the four groups of pre-charging resistors 21, the two groups of pre-charging resistors 21 are arranged behind the main contactor 18, and the two groups of pre-charging resistors 21 are arranged at the top of the cabinet body 1;

the chopper resistor 22 is arranged in a single area at the top of the cabinet body 1, and is isolated from other parts in the cabinet body 1 due to large heat productivity;

the slow discharge resistor 23 is fixed on the electric water-resistant cold plate through a bolt, the back of the slow discharge resistor 23 is coated with heat-conducting silicone grease, and heat exchange and heat dissipation are carried out through cooling liquid in the electric water-resistant cold plate.

Further, the sensor assembly 9 comprises four input current sensors 24, eight output current sensors 25 and six auxiliary output current sensors 26 which are arranged at an electrical interface at the bottom of the cabinet body 1, the sensor assembly 9 is fixed on a copper bar through bolts, and the copper bar is installed on a wall bushing; the two chopping current sensors 27 and the six voltage sensors 28 are all arranged in a middle high-voltage area, so that wiring is convenient; the two pressure sensors 29 and the two temperature sensors 30 are both installed at a water inlet 32 of a water cooling pipeline 31 and used for detecting the pressure and the temperature of the cooling liquid.

Further, the cooling assembly 10 includes a cooling system, which includes a water cooling pipeline 31, a temperature control device 33, a rubber hose, a quick water connector, a pressure sensor 29, a temperature sensor 30, a water inlet stop valve, and a water outlet stop valve. The cooling water pipe material is the stainless steel, adopts bellows and rubber hose to be connected with module kneck, and inlet tube and outlet pipe high point and afterbody are equipped with discharge valve, guarantee that the coolant liquid can get rid of the gas in the water cooling pipeline 31 when the circulation, avoid having gaseous gathering in the water cooling pipeline 31, lead to the coolant liquid circulation unsmooth, influence heat dispersion.

Further, as shown in fig. 5-6, the temperature control device 33 circulates air and cools the inside of the cabinet, the left and right sides of the temperature control device 33 are sealed, the left and right sides of the top of the temperature control device are provided with holes for air circulation, the front and rear surfaces of the temperature control device are sealed by the front door panel and the rear door panel, the bottom of the temperature control device is communicated with the whole cabinet body 1, and the inside of the whole cabinet body 1 is cooled by the temperature control device 33; sealing strips are pasted on all the outward door plates, so that the sealing performance of the cabinet body 1 is guaranteed. The temperature control device 33 ensures that the converter can be operated reliably even in the sealed condition.

Further, referring to fig. 4, the current transformer further includes: the converter high-voltage interface 34 is arranged at the lower right part of the cabinet according to the requirement of the whole vehicle; the converter low-voltage interface 35 is arranged at the right side of the cabinet; the water-cooling pipe is arranged on the right side wall of the cabinet body 1 and comprises a water inlet 32 and a water outlet 36.

Further, for the case assembly 12, the converter cabinet body 1 needs to meet the requirement of-40 ℃, the main frame is made of a low-alloy steel plate with the material of Q345E and the thickness of 4mm, the welding mode is mainly adopted, and the bolt installation mode is adopted for parts locally needing to ensure fine size.

Furthermore, the front door and the rear door of the high-power traction auxiliary converter 3 both adopt aluminum plates with the thickness of 2mm, the rear door adopts a bolt fixing mode, and the front door is connected with the cabinet body 1 through a grounding device, so that reliable grounding is ensured; the installed door lock and the whole vehicle have a safety interlocking function; have high pressure indication sign and warning sign, avoid the electric shock danger that the maintainer leads to because of maloperation etc.. And the front door and the rear door are provided with door locking handles, so that the front door and the rear door are convenient to disassemble, assemble and carry.

Furthermore, the high-power traction auxiliary converter comprises an isolating switch 19, every two groups of traction converters 2 are arranged on the left side or the right side of the converter, each group of auxiliary converters 3 is provided with the isolating switch 19, when one group of traction converters 2 has a power module short circuit major fault, the fault traction converter can be isolated through the isolating switch 19, and the other group of traction converters 2 can be ensured to normally work; when the auxiliary converter 3 has a major short-circuit fault of the power module, the fault auxiliary converter can be isolated through the isolating switch 19, and the normal work of the traction converter is not influenced; due to the design of the isolating switch 19, the redundancy of the whole converter in operation is increased, and the reliability of the whole converter in operation is improved.

The technical scheme provided by the invention has the following beneficial effects: four groups of traction converters and two groups of auxiliary converters are integrated and then are used for a power-concentrated motor train unit of an electric locomotive company to provide a proper power supply for a locomotive traction motor and an auxiliary load; the converter adopts a modularized and symmetrical design, and has small volume, light weight and high integration degree; the sealing design, the high redundancy design and assembly and the simple and efficient production can meet the light-weight and high-integration design requirements of the whole locomotive, the structural space is greatly saved, the integration level is improved, and the electrical interference is reduced.

Example 2:

the invention also provides a high-power traction auxiliary converter, which is shown in figure 1 and mainly comprises ten components, as shown in figures 2-3, a power module and capacitor assembly 6 (comprising main components such as a traction power module 13, an auxiliary inversion power module 14, a middle support capacitor 15, a secondary filter capacitor 17, a composite busbar 16 and the like), a low-voltage electrical appliance assembly 7 (comprising main components such as a traction control unit, a relay, a voltage transformer, a current transformer, a filter and the like), a switching electrical appliance assembly 8 (mainly comprising main components such as a main contactor 18, a pre-charging contactor 20, an isolating switch 19, a pre-charging resistor 21, a chronic discharging resistor, a chopping resistor 22 and the like), a sensor assembly 9 (comprising a current sensor and a voltage sensor 28, a pressure sensor 29, a temperature sensor 30 and the like of an input grounding loop, an output grounding loop and a middle loop), Cooling module 10 (including temperature control device 33, the main part such as electric resistance water cold plate), low-voltage line subassembly (various low-voltage lines), high-voltage auxiliary assembly (various high-voltage lines), copper bar subassembly 11 (various input, output copper bars), box body subassembly 12 and door subassembly.

This high-power traction auxiliary converter wholly adopts sealed design, when breaking down in the course of the work, can open the converter cabinet door and conveniently carry out dismouting, maintenance to converter trouble module.

In conclusion, the high-power traction auxiliary converter provided by the invention can be applied to a certain type of power-concentrated motor train unit and is used for providing a proper power supply for a locomotive traction motor and an auxiliary load. The integrated power module is small in size, light in weight, high in sealing design and redundancy design, high in integration degree, simple and efficient in assembly and production, and capable of integrating four groups of traction converters and two groups of auxiliary converters, layering layout of the power modules, and four traction units and two auxiliary transformer units share one cooling system.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A high power traction auxiliary converter, comprising: the intelligent power supply system comprises a cabinet body (1), wherein various devices are arranged in the cabinet body (1), and the devices comprise four groups of traction converters (2), two groups of auxiliary converters (3), a control unit (4) and a cooling unit (5); two groups of traction converters (2) and one group of auxiliary converters (3) are respectively arranged on two sides of the cooling unit (5); the control unit (4) is positioned at the upper right part of the cabinet body (1), and the cooling unit (5) cools the traction converter (2) and the auxiliary converter (3) simultaneously;

the device further comprises a power module and a capacitor assembly (6), a low-voltage electrical apparatus assembly (7), a switching electrical apparatus assembly (8), a sensor assembly (9), a cooling assembly (10), a copper bar assembly (11), a box body assembly (12), a low-voltage wire assembly, a high-voltage auxiliary assembly and a door assembly which are arranged in the cabinet body;

the switch electric appliance assembly (8) comprises four main contactors (18), wherein the main contactors (18) are arranged at the lower left of the cabinet body, and the main contactors (18) are respectively connected with the traction power module (13) and the wall bushing through copper bars and a large wire;

the isolation switches (19) are arranged at the upper part of the cabinet body, the isolation switches (19) are connected with the power module and the capacitor assembly (6) through copper bars, and the isolation switches (19) are also connected with the secondary filter capacitor (17) through copper bars and a large line;

four pre-charging contactors (20), wherein the pre-charging contactors (20) are arranged on the right side of the main contactor (18);

the four groups of pre-charging resistors (21), the two groups of pre-charging resistors (21) are arranged behind the main contactor (18), and the two groups of pre-charging resistors (21) are arranged at the top of the cabinet body;

the chopper resistor (22), the said chopper resistor (22) is placed in the separate area of the top of the cabinet;

the slow-release resistor (23) is fixed on the electric water-resistant cold plate through a bolt, heat-conducting silicone grease is coated on the back of the slow-release resistor (23), and heat exchange and heat dissipation are carried out through cooling liquid in the electric water-resistant cold plate;

the sensor assembly (9) comprises four input current sensors (24), eight output current sensors (25) and six auxiliary output current sensors (26) which are arranged at an electrical interface at the bottom of the cabinet body, the sensor assembly (9) is fixed on a copper bar through bolts, and the copper bar is installed on a wall bushing; two chopping current sensors (27) and six voltage sensors (28) are all placed in a high-voltage area in the middle of the cabinet body; the two pressure sensors (29) and the two temperature sensors (30) are both arranged at a water inlet (32) of a water cooling pipeline (31);

the cooling assembly (10) comprises a cooling system, a temperature control device (33), a rubber hose, a quick water connector, a water inlet stop valve and a water outlet stop valve, wherein the cooling system comprises a water cooling pipeline (31); temperature control device (33) for carry out air cycle and cooling to in the cabinet, the left and right sides of temperature control device (33) is airtight, and its top left and right sides is opened the hole and is carried out the circulation of air, and its front and back surface is airtight through preceding door plant and back door plant, and the bottom communicates with each other with whole cabinet body (1), cools down through temperature control device (33) to whole cabinet body (1) inside.

2. The high power traction auxiliary converter according to claim 1, characterized in that said power module and capacitor assembly (6) comprises eight traction power modules (13), two auxiliary inverter power modules (14) and eight intermediate support capacitors (15); each auxiliary inversion power module (14) and each intermediate support capacitor (15) are arranged adjacently and connected through a composite busbar (16), and every four traction power modules (13) and the intermediate support capacitors (15) are arranged vertically and horizontally symmetrically and connected through the composite busbars (16).

3. The high-power traction auxiliary converter according to claim 1, wherein the power module and capacitor assembly (6) further comprises twelve secondary filter capacitors (17) disposed at the rear side of the cabinet, every six secondary filter capacitors (17) form one group, two adjacent groups of secondary filter capacitors (17) are connected in parallel through a composite busbar (16), and the composite busbar (16) is connected with the power module and capacitor assembly (6) through a high-voltage cable.

4. High power traction auxiliary converter according to claim 1, characterized in that said low voltage electrical components (7) are arranged below the control unit (4).

5. The high power traction auxiliary converter according to claim 1, further comprising: the converter high-voltage interface (34) is arranged at the lower right of the cabinet; the converter low-voltage interface (35) is arranged on the right side of the cabinet; the water-cooling pipe interface is arranged on the right side wall of the cabinet body and comprises a water inlet (32) and a water outlet (36).