阅读说明：本技术 一种机车变流器交流输入单元集成组件 (Locomotive converter alternating current input unit integrated assembly ) 是由 郭彭昱 杨璐 李岩 李锦� 郑旭阳 王喜乐 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种机车变流器交流输入单元集成组件,包括主接触器(1)、预充电接触器(2)和预充电电阻(3)；所述主接触器(1)、预充电接触器(2)和预充电电阻(3)集成于固定板(4)上,所述主接触器(1)位于固定板(4)前部,所述预充电电阻(3)位于固定板(4)后端,所述预充电接触器(2)位于固定板(4)中部。交流输入单元安装在变流器左下方,该交流输入单元采用模块化、组件化方式,减少电缆数量及长度,保证产品可靠性；简化变流器布局,减小变流器体积；组件正面安装,维护方便,降低运用检修成本,以满足变流装置小型化、轻量化、模块化、高可靠性的发展。(The invention discloses an alternating current input unit integrated assembly of a locomotive converter, which comprises a main contactor (1), a pre-charging contactor (2) and a pre-charging resistor (3); main contactor (1), pre-charge contactor (2) and pre-charge resistance (3) are integrated on fixed plate (4), main contactor (1) is located fixed plate (4) front portion, pre-charge resistance (3) are located fixed plate (4) rear end, pre-charge contactor (2) are located fixed plate (4) middle part. The alternating current input unit is arranged at the left lower part of the converter, and the alternating current input unit adopts a modularization and modularization mode, so that the number and the length of cables are reduced, and the reliability of a product is ensured; the layout of the converter is simplified, and the size of the converter is reduced; the front side of the assembly is installed, the maintenance is convenient, and the application and maintenance cost is reduced, so that the development of miniaturization, light weight, modularization and high reliability of the converter device is met.)

1. An alternating current input unit integrated assembly of a locomotive converter comprises a main contactor (1), a pre-charging contactor (2) and a pre-charging resistor (3);

the method is characterized in that: main contactor (1), pre-charge contactor (2) and pre-charge resistance (3) are integrated on fixed plate (4), main contactor (1) is located fixed plate (4) front portion, pre-charge resistance (3) are located fixed plate (4) rear end, pre-charge contactor (2) are located fixed plate (4) middle part.

2. A locomotive converter ac input unit integrated assembly as claimed in claim 1 wherein: three sets of main contactors (1), pre-charging contactors (2) and pre-charging resistors (3) are integrated on the fixing plate (4) in parallel.

3. A locomotive converter ac input unit assembly according to claim 1 or 2, wherein: the high-voltage part of the main contactor (1) is connected by a copper bar (8), and the low-voltage part of the main contactor is connected by a cable interface (9).

4. A locomotive converter ac input unit integrated assembly as claimed in claim 3, wherein: the three pre-charging resistors (3) are vertically arranged at the rear end of the fixed plate (4) side by side.

5. A locomotive converter AC input cell assembly as claimed in claim 4 wherein: two sides of the fixing plate (4) are reinforced by triangular beams (5).

6. A locomotive converter AC input cell assembly as claimed in claim 5 wherein: two side surfaces of the fixed plate (4) are respectively arranged in an input unit functional area (101) of the converter (10) through slide rails (6).

7. A locomotive converter AC input cell assembly as claimed in claim 6 wherein: the rear end of the fixing plate (4) is provided with a handle (7).

Technical Field

The invention relates to the technical field of electric locomotives, in particular to an alternating current input unit integrated assembly of a locomotive converter.

Background

With the rapid development of rail transit technology, the high-power IGBT is widely applied to the converter, and the converter is developing towards miniaturization, light weight, modularization and high reliability. Under the conditions of high voltage and large current, the electromagnetic environment is very complex, so that the wiring in the converter cabinet is required to be as convenient as possible, and the converter cabinet can bear stronger electromagnetic interference; meanwhile, the reform of the locomotive C5 maintenance without falling is considered, the maintenance cost is reduced, and the online maintenance efficiency is improved. Traditional converter exchanges input unit and adopts main contactor, pre-charging resistance separation mode, carries out electrical connection through copper bar or cable, has the shortcoming: 1. the main contactor, the pre-charging contactor and the pre-charging resistor are separately arranged, so that the cable routing is long and inconvenient, and the cost is high; 2. the layout of the devices is not centralized, the occupied space and the volume are large, and the miniaturization and lightweight design of the locomotive traction converter are not facilitated; 3. the device integration level is not high, the installation efficiency is low, and the device is not beneficial to maintenance and replacement in case of failure; 4. the maintenance cost of locomotive operation is higher.

Disclosure of Invention

In order to better meet the railway transportation requirement, ensure the reliable application of a harmonious locomotive and reduce the application and maintenance cost, the development of miniaturization, light weight, modularization and high reliability of a power unit is met. The invention aims to design an alternating current input unit assembly applied to a high-power locomotive traction system with the IGBT grade of 3300V, and the alternating current input unit assembly adopts a modular and modular structure mode with stronger integrity, realizes the reliable transmission of the alternating current input unit of a converter, reduces the volume of the converter, is convenient to install and maintain, and improves the reliability and the maintainability of the converter.

The invention is realized by adopting the following technical scheme:

an integrated assembly of an alternating current input unit of a locomotive converter comprises a main contactor, a pre-charging contactor and a pre-charging resistor.

The main contactor, the pre-charging contactor and the pre-charging resistor are integrated on the fixing plate, the main contactor is located at the front portion of the fixing plate, the pre-charging resistor is located at the rear end of the fixing plate, and the pre-charging contactor is located in the middle of the fixing plate.

Preferably, three sets of the main contactor, the pre-charging contactor and the pre-charging resistor are integrated on the fixed plate in parallel.

With converter AC input unit's main contactor, pre-charge contactor and pre-charge resistance integration on an installation component, adopt modularization, modular design, install left side below in the converter through board-like drawer slide rail mounting means, the inside cooperation guide rail that sets up of converter, structural realization modularization, modular design reduce the interior wiring of cabinet, be convenient for rationalize, compactization, it is convenient to walk the line when promoting the reliability, be convenient for maintain and overhaul.

The design and the application of the traction converter alternating current input unit have the following beneficial effects:

1. and the number and the length of cables are reduced and the layout is simplified by adopting a modularization and modularization mode.

2. And the modularized and modularized mode is adopted, so that the locomotive converter is beneficial to the miniaturization and light-weight design.

3. The problems of low installation efficiency and inconvenient online installation and maintenance are solved by adopting a modularization and modularization mode.

4. And the maintenance cost is reduced by adopting a modularization and modularization mode.

The invention has reasonable design, the AC input unit is arranged in the converter in a sliding rail way, and the assembly is arranged and disassembled on the front side, so that the converter can be maintained under the condition of not falling down, and the online maintenance time is shortened.

Drawings

Fig. 1 shows a principle diagram of a main circuit of a traction system.

Fig. 2 shows a schematic diagram of a single-shaft main circuit of the traction system.

Fig. 3 is a schematic diagram of an integrated assembly of an input unit according to the present invention.

Fig. 4 shows a schematic diagram of a current transformer layout.

In the figure: 1-a main contactor, 2-a pre-charging contactor, 3-a pre-charging resistor, 4-a fixing plate, 5-a triangular beam, 6-a sliding rail, 7-a handle, 8-a copper bar and 9-a cable interface; 10-a converter, 101-an input unit functional area, 102-a traction power module unit functional area, 103-a middle support capacitor unit functional area, 104-a high-voltage input and output unit functional area, 105-an auxiliary inversion power module unit functional area, 106-an auxiliary control unit functional area, 107-a low-voltage electrical appliance unit functional area, 108-a traction control unit functional area, 109-a grounding detection unit functional area, 110-a chopper resistance unit functional area and 111-a cooling system unit functional area.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

The input unit integrated assembly is applied to a converter of a high-power electric locomotive with the IGBT grade of 3300V, 3 groups of independent traction loops are adopted in a main circuit of the converter, each group of traction main circuit comprises an alternating current input unit functional circuit (shown in a dotted frame in figure 1), and the pre-charging process, the alternating current-direct current conversion and the related protection control of the converter are carried out.

As shown in fig. 2, by designing the main circuit of the traction system, a modular design platform of the converter is formed from the electrical structure and the structural layout, and the electrical structure is mainly decomposed into: the device comprises an alternating current input unit, a four-quadrant power unit, a grounding detection unit, a slow discharge unit, a chopper resistance unit, an inverter power unit and the like.

As shown in fig. 4, in consideration of the overall layout and maintenance of the converter, the converter 10 is structurally divided into an input unit functional area 101, a traction power module functional area 102, an intermediate support capacitor unit functional area 103, a high voltage input/output unit functional area 104, an auxiliary inverter power module functional area 105, an auxiliary control unit functional area 106, a low voltage electrical apparatus unit functional area 107, a traction control unit functional area 108, a ground fault detection unit functional area 109, a chopper resistance unit functional area 110, and a cooling system unit functional area 111 according to functional unit and modular design concepts. And the special requirements of different projects are considered in the design of each region, so that the maintainability, the safety and the reliability of the converter are ensured.

In specific implementation, the alternating current input unit assembly applied to the converter of the high-power electric locomotive with the IGBT grade of 3300V comprises a main contactor 1 (1800V/2000A), a pre-charging contactor 2 (2000V/200A) and a pre-charging resistor 3 (22 omega/33 kJ).

As shown in fig. 3, the main contactor, the pre-charging contactor, and the pre-charging resistor are integrated into one unit to form a small assembly, namely: three sets of main contactors 1, pre-charging contactor 2 and pre-charging resistor 3 are integrated on fixed plate 4 in parallel, three main contactors 1 are located at the front of fixed plate 4, three pre-charging resistors 3 are vertically located at the rear end of fixed plate 4, and three pre-charging contactors 2 are located in the middle of fixed plate 4. The high-voltage part of the main contactor 1 is connected by adopting a copper bar 8, the low-voltage part of the main contactor is connected by adopting a cable interface 9, the high-voltage and low-voltage electrical connection functional units are externally connected by adopting the copper bar and a cable, strong and weak electricity are separated, the middle high-voltage connecting part is connected by adopting the copper bar, and the electrical reliability connection is ensured while the quick disassembly and assembly are realized. The low-voltage connection is integrated on the connector, so that the plugging and unplugging are convenient, and the installation and maintenance efficiency is improved. Two sides of the fixed plate 4 are reinforced by triangular beams 5. Two side surfaces of the fixed plate 4 are respectively arranged in an input unit functional area 101 of the alternating current cabinet through slide rails 6, and the fixed plate is installed in the converter in a drawer-type push-pull mode, so that maintenance is facilitated. The rear end of the fixing plate 4 is provided with a handle 7, so that the single assembly is convenient to operate, the space is compact, and the disassembly, assembly and maintenance are convenient after the whole unit is integrated.

As shown in fig. 4, the ac input unit is installed at the left lower side of the converter, and the ac input unit adopts a modularized and modularized manner, so that the number and length of cables are reduced, and the reliability of the product is ensured; the layout of the converter is simplified, and the size of the converter is reduced; the front side of the assembly is installed, the maintenance is convenient, and the application and maintenance cost is reduced, so that the development of miniaturization, light weight, modularization and high reliability of the converter device is met.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the detailed description is made with reference to the embodiments of the present invention, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which shall be covered by the claims of the present invention.