CN213661428U - High-power unit bypass contactor postposition type high-voltage frequency converter - Google Patents

Abstract

The utility model provides a high-power unit bypass contactor postposition type high-voltage inverter, a transformer I and a transformer II are installed in a transformer cabinet, the primary sides of the two transformers are connected through a parallel bus bar arranged at the rear side of a cabinet body, a secondary side bus bar of the transformer I is arranged at the rear side of the transformer cabinet, and a secondary side bus bar of the transformer II is arranged at the front side of the transformer cabinet; the bypass contactors of the power cabinet are all arranged on the rear side of the power cabinet; an input copper bar of the power unit, namely the RST bar, penetrates through the front and the back of the power unit, cable brackets are arranged on the front and the back sides of the power cabinet, an output cable on the secondary side of the transformer I is fixedly connected to the back end of the RST bar through the cable bracket on the back side, and an output cable on the secondary side of the transformer II is fixedly connected to the front end of the RST bar through the cable bracket on the front side. The position of the rear space of make full use of transformer cabinet and power cabinet improves the space utilization of the cabinet body, also does benefit to later maintenance and maintenance simultaneously.

Description

High-power unit bypass contactor postposition type high-voltage frequency converter

Technical Field

The utility model relates to a converter technical field, in particular to rear-mounted high-voltage inverter of high-power unit bypass contactor.

Background

Along with the gradual development of the concept of energy conservation and emission reduction, the adoption of a variable frequency adjusting technology, particularly a high-voltage variable frequency adjusting technology, has become a trend, and the variable frequency adjusting technology has the characteristics of excellent speed regulation performance, perfect protection function, obvious energy-saving effect, easiness in realizing automatic adjustment with an automatic control system interface and the like, and is widely applied to the transformation of high-voltage and high-capacity rotating equipment such as power plant conveying, a draught fan, a water feeding pump, a drainage pump, a ash pump, a coal pulverizer and the like.

A common bypass function high-voltage frequency converter consists of a transformer cabinet, a power cabinet and a control cabinet, and a bypass contactor is integrated in a power unit. Each set of frequency conversion equipment comprises a set of power module and a bypass driving board module which have actual bypass functions. The transformer cabinet, the power cabinet and the control cabinet are connected in a cabinet combination manner, and cables on the secondary side of the transformer cabinet are placed on a partition plate on the lower part of the power unit and are directly connected with R, S, T rows of power unit input copper bars. The control cable in the transformer cabinet is connected into the control cabinet through the wiring groove between the power cabinets. The top fans of the transformer cabinet and the power cabinet adopt a cooling mode of forced air cooling heat exchange.

The design layout of traditional high-voltage inverter cabinet does not make full use of the region of cabinet body rear side for space utilization is low. Meanwhile, the wiring and the later maintenance of a secondary side cable of the transformer are inconvenient, and the installation and the maintenance of a bypass contactor of the power unit are inconvenient.

Disclosure of Invention

In order to solve the technical problem that the background art provided, the utility model provides a rear-mounted high-voltage inverter of high-power unit bypass contactor, the space utilization of the rear portion space of make full use of transformer cabinet and power cabinet improves the space utilization of the cabinet body, also does benefit to later maintenance and maintenance simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-power unit bypass contactor rear-mounted high-voltage frequency converter comprises a transformer cabinet, a power cabinet and a control cabinet, wherein the transformer cabinet, the power cabinet and the control cabinet are arranged from left to right and are connected through cabinet combining bolts between the cabinets.

The utility model is characterized in that:

the transformer cabinet is internally provided with a first transformer and a second transformer, the primary sides of the two transformers are connected through a parallel busbar arranged on the rear side of the cabinet body, a secondary side busbar of the first transformer is arranged on the rear side of the transformer cabinet, and a secondary side busbar of the second transformer is arranged on the front side of the transformer cabinet.

The front side of the power cabinet is provided with a plurality of power units, and a bypass contactor configured for each power unit is arranged on the rear side of the power cabinet; the tail end of a bypass output busbar of the power unit is led to the rear side of the power unit and connected with a bypass contactor.

An input copper bar of the power unit, namely the RST bar, penetrates through the front and the back of the power unit, cable brackets are arranged on the front and the back sides of the power cabinet, an output cable on the secondary side of the transformer I is fixedly connected to the back end of the RST bar through the cable bracket on the back side, and an output cable on the secondary side of the transformer II is fixedly connected to the front end of the RST bar through the cable bracket on the front side.

Furthermore, a power module is also installed in the power cabinet, and the power module is also installed at the rear side of the power cabinet.

Compared with the prior art, the beneficial effects of the utility model are that:

1) in the structural form of the double transformers, the parallel copper bars on the primary sides of the two transformers are arranged on the rear side of the cabinet body (the top of the rear side of the cabinet body), cables on the secondary sides of the transformers are wired in front and back (the middle of the rear side of the cabinet body), the rear space of the transformer cabinet is fully utilized, and the depth of the cabinet body is reduced; the ventilation effect of components at the rear part of the cabinet body is improved; meanwhile, the operation space of a user can be increased, convenience is provided for on-site wiring of workers, and later maintenance and overhaul are facilitated.

2) The power cabinet adopts a structure form that a bypass contactor is arranged at the rear, the power unit bypass output row adopts a structure form that a composite bus bar is arranged, the output position leads to the rear side of the unit, the rear space of the power cabinet is fully utilized, and the depth of the cabinet body is reduced; the ventilation effect of components at the rear part of the cabinet body is improved; the bypass contactor is convenient to install, simple to operate and beneficial to later maintenance and overhaul.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic diagram of the double-transformer cabinet of the present invention (front side of the cabinet body);

fig. 3 is a schematic diagram of the dual transformer cabinet of the present invention (front side of the cabinet body);

fig. 4 is a schematic view of an installation manner of the bypass contactor of the power cabinet (a rear side view of the cabinet body);

fig. 5 is a schematic view (side view) of the installation manner of the bypass contactor of the power cabinet of the present invention;

fig. 6 is a schematic view of the installation manner of the bypass contactor of the power cabinet according to the present invention (partially enlarged view I);

fig. 7 is a schematic view of the installation manner of the bypass contactor of the power cabinet according to the present invention (partially enlarged view II);

fig. 8 is an isometric schematic view of a power cabinet according to the present invention;

fig. 9 is an enlarged view of a cable tray of an isometric schematic of a power cabinet according to the present invention;

fig. 10 is a schematic view of a protective net at the front side of the cabinet body of the present invention;

fig. 11 is a schematic view of the installation manner of the power module of the present invention;

fig. 12 is a front view of the heat dissipation fan and the air door on the top of the transformer cabinet and the power cabinet of the present invention;

fig. 13 is a schematic side view of the heat dissipation fan and the air door on the top of the transformer cabinet and the power cabinet of the present invention.

In the figure: 1-transformation cabinet 2-power cabinet 3-control cabinet 4-transformer I5-transformer II 6-transformer II secondary side terminal busbar 7-transformer I secondary side terminal busbar 8-fan unit 9-cable joint of transformer II secondary side busbar 10-cable joint of transformer I secondary side busbar 11-primary side parallel busbar 12-bypass contactor 13-cable bracket 14-RST row 15-bypass contactor connecting row 16-bypass output busbar (unit composite busbar) 17-transformer secondary side cable 18-protective net 19-power module 20-hasp 21-air door 22-power unit.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-9, a high-power unit bypass contactor rear-mounted high-voltage inverter comprises a transformer cabinet 1, a power cabinet 2 and a control cabinet 3, wherein the transformer cabinet 1, the power cabinet 2 and the control cabinet 3 are arranged from left to right and are connected through a cabinet combining bolt between the cabinets.

The transformer cabinet 1 is internally provided with a first transformer 4 and a second transformer 5, the primary sides of the two transformers are connected through a parallel busbar 11 arranged on the rear side of the cabinet body, a secondary side busbar 7 of the first transformer 4 is arranged on the rear side of the transformer cabinet 1, and a secondary side busbar 6 of the second transformer 5 is arranged on the front side of the transformer cabinet 1.

A plurality of power units 22 are installed on the front side of the power cabinet 2, and the bypass contactor 12 configured for each power unit 22 is installed on the rear side of the power cabinet 2; the tail end of the bypass output busbar 16 of the power unit 22 is led to the rear side of the power unit 22 and is connected with the bypass contactor 12.

An input copper bar 14 of the power unit 22, namely the RST bar 14, penetrates through the front and the back of the power unit 22, cable brackets 13 are mounted on the front and the back sides of the power cabinet 2, an output cable 17 on the secondary side of the transformer I4 is fixedly connected to the back end of the RST bar 14 through the cable bracket 13 on the back side, and an output cable 17 on the secondary side of the transformer II 5 is fixedly connected to the front end of the RST bar 14 through the cable bracket 13 on the front side. When the power cabinet is high in power, the current and the transformer capacity are large, the power unit 22 is increased, the number of stages of the power cabinet 2 is increased, and the structural form of connecting cables behind the cabinet is adopted, so that the operation is simple, and the maintenance is convenient. The bypass contactor 12 is placed in an air duct at the rear side of the power cabinet 2, and is connected with a bypass output busbar (unit composite busbar) 16 of the power unit through a bypass contactor connecting bar 15, so that a bypass function is realized, and the bypass contactor 12 is placed at the rear side of the power cabinet 2 and is convenient to install.

As shown in fig. 10 to 11, the power cabinet 2 is further installed with a power module 19, and the power module 19 is also installed at the rear side of the power cabinet 2. The power module 15 is arranged on the side face of the rear part of the cabinet body, and 2 sets of power modules 19 are adopted for ensuring the electrical performance, and the power modules are used and prepared. The protective net 18 is a protective net at the front side of the power cabinet 2, and an electromagnetic compatibility design principle is achieved.

As shown in fig. 12-13, do respectively the utility model discloses a transformer cabinet, power cabinet top cooling fan and air door schematic diagram, for fan unit 8 links together with air door 21 through hasp 20 and constitute, the fan possesses the spare fan function of trouble automatic switch-over, configures air door 21 device, prevents that the wind path short circuit problem from appearing in the fan trouble.

The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims (2)

1. A high-power unit bypass contactor postposition type high-voltage frequency converter comprises a transformer cabinet, a power cabinet and a control cabinet, wherein the transformer cabinet, the power cabinet and the control cabinet are arranged from left to right and are connected through a cabinet combining bolt between the cabinets;

the transformer cabinet is characterized in that a first transformer and a second transformer are installed in the transformer cabinet, primary sides of the two transformers are connected through a parallel bus arranged on the rear side of the cabinet body, a secondary side bus of the first transformer is arranged on the rear side of the transformer cabinet, and a secondary side bus of the second transformer is arranged on the front side of the transformer cabinet;

the front side of the power cabinet is provided with a plurality of power units, and a bypass contactor configured for each power unit is arranged on the rear side of the power cabinet; the tail end of a bypass output busbar of the power unit is led to the rear side of the power unit and is connected with a bypass contactor;

an input copper bar of the power unit, namely the RST bar, penetrates through the front and the back of the power unit, cable brackets are arranged on the front and the back sides of the power cabinet, an output cable on the secondary side of the transformer I is fixedly connected to the back end of the RST bar through the cable bracket on the back side, and an output cable on the secondary side of the transformer II is fixedly connected to the front end of the RST bar through the cable bracket on the front side.

2. The high-power unit bypass contactor post-positioned high-voltage inverter as claimed in claim 1, wherein a power module is further installed in the power cabinet, and the power module is also installed at the rear side of the power cabinet.

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