CN203233181U - A Modular Static Var Generator Power Cabinet - Google Patents

Abstract

The utility model relates to a modular power cabinet of a static var generator. The modular power cabinet comprises a plurality of modular power units which are arranged side by side in longitudinal direction and are in serial connection with each other, and each row corresponds to one phase. Three phases of the power cabinet are of integrated modular-type integration structures which are arranged in an up-down way. One power unit is connected with one capacitor unit via extension sockets and the power units in the power cabinet are connected with each other via series bars of the power units. The modular power cabinet of the static var generator is advantageous in that: the power units are of integrated modular-type integration structures, each phase is formed by a row of the power units arranged in the longitudinal direction; the modular power cabinet is compact in structure, small in size, high in reliability and low in cost; the units are directly connected with each other by busbars without cable connection; support beams on the side faces of the power units can be used as fixing beams and conducting bars at the same time; and control panels are fixed on fixed panels.

Description

A Modular Static Var Generator Power Cabinet

technical field

The utility model relates to the field of medium and high voltage reactive power compensation, in particular to a modular static var generator power cabinet.

Background technique

Static var generator, referred to as SVG, plays a role in improving the power factor of the power grid in the power supply system, reducing the loss of power supply transformers and transmission lines, improving power supply efficiency, and improving the power supply environment. Therefore, the static var generator is in an indispensable and very important position in the power system. Reasonable selection of compensation devices can minimize the loss of the power grid and improve the quality of the power grid. On the contrary, if it is improperly selected or used, it may cause many factors such as voltage fluctuations in the power supply system, increase in harmonics, and so on. The traditional SVG power cabinet has many defects such as complex wiring, cumbersome cable connections, difficult maintenance and replacement of internal components, and high production costs. Due to the layout of the existing structure, there are many and long interconnections, which are complicated and inconvenient for assembly and maintenance; in order to facilitate the installation and connection, a certain interval must be ensured between the power units, so that the volume of the power cabinet is relatively large; moreover, multiple The layout of separate arrangement of two large-volume cabinets makes the overall structure of the high-voltage static var generator large in volume, large in floor space, high in cost, and low in power density.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a high power density modular static var generator power cabinet with a compact structure and convenient wiring between the power cabinet units to solve the problems in the prior art. The traditional reactive power compensation device has slow speed, complex circuit structure, difficult maintenance and replacement of internal components, and inconvenient maintenance and transportation.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A modular static var generator power cabinet, including a plurality of modular power units arranged side by side vertically, each power unit is connected in series, and each row corresponds to a phase; the three phases of the power cabinet are an integrated modular structure arranged up and down Integrated structure; each power unit is connected to the capacitor unit through a plug-in row, and the power units inside the power cabinet are connected through a power unit series connection.

The modular power unit is a stacked structure, mainly composed of a control board, a drive board, a full-control device, a radiator, a power unit composite busbar, a temperature sensor, a surge capacitor, a series connection row, a support capacitor socket, a fixed Composed of panels and side support beams, each component forms a modular integrated structure, the control board is located on the uppermost layer, the full-control device is located at the lower part of the drive board, the bottom of the full-control device and the bottom of the temperature sensor are connected to the radiator, and the power unit composite busbar It is set on the DC output side of the full-control device, and the surge capacitor is installed on the supporting capacitor socket; the full-control device is connected in series through a series connection, and the AC input and output of the full-control device are connected to the conductive material through the row. Side support beams.

The rear part of the power cabinet is equipped with a capacitor unit installation part. The capacitor part and the power unit expanded according to the equipment capacity have a separate structure. The capacitors are led out in two directions, and the capacitors are connected through the composite busbar of the capacitor unit. , the positive and negative outputs of the capacitor unit are connected to the plug, and the discharge resistor is installed on the plug.

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

1) Each phase of the power cabinet is a row of vertically placed power units. The structure is compact, and the volume can be reduced by at least 1/2 compared with the split layout. The units are directly connected by busbars without cable connection, and the reliability is high. ,low cost.

2) The power unit adopts a modular integrated structure, the power unit is placed vertically, and the duty cycle is small. The side support beam of the power unit is used as a fixed beam and also as a conductive bar, and the control board is fixed on the fixed panel.

3) The lead-out of the capacitor unit is two-way lead-out, and is directly connected to the plug, and the discharge resistor is fixed on the plug.

4) The power unit and capacitor unit are installed in a free and quick plug-in connection mode, which is convenient for production storage, installation, expansion, maintenance and transportation of the power unit, and has strong versatility.

5) The capacitor unit that needs to be expanded in the power cabinet is set separately from the power unit, which can be easily expanded, and it is very convenient to match the capacitor according to the equipment capacity requirements.

Description of drawings

Fig. 1 is the schematic circuit diagram of the utility model.

Fig. 2 is a single-phase schematic diagram of the utility model.

Fig. 3 is a front view of the appearance of the utility model.

Fig. 4 is a front view of the structural layout of the utility model.

Fig. 5 is a left side view of Fig. 4 .

Fig. 6 is a connection structure diagram of the capacitor unit and the power unit.

Fig. 7 is a schematic diagram of the structure of the power unit.

Fig. 8 is a schematic diagram of the structure of the capacitor unit.

In the figure: 1-cabinet 2-fan 3-air inlet 4-power unit 5-capacitor unit 6-control board 7-drive board 8-full control device 9-radiator 10-power unit composite busbar 11-temperature Sensor 12-Surge Capacitor 13-Support Capacitor Socket 14-Fixed Panel 15-Series Bar 16-Side Support Beam 17-Handle 18-Capacitor 19-Capacitor Unit Composite Busbar 20-Plug 21-Discharge Resistor 22-Power Unit String Receive row.

Detailed ways

The utility model is described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

As shown in Figures 1 to 8, a modular static var generator power cabinet, hereinafter referred to as the power cabinet, includes a plurality of modular power units 4 arranged side by side vertically, and each power unit 4 is connected in series, and each row corresponds to a phase The three phases of the power cabinet are an integrated modular integrated structure arranged up and down; each of the power units 4 and the capacitor unit 5 are connected through a plug-in row, and the power units 4 inside the power cabinet are connected through a series connection of power units.

The modular power unit 4 is a stacked structure, mainly composed of a control board 6, a drive board 7, a full control device 8, a radiator 9, a power unit composite busbar 10, a temperature sensor 11, a surge capacitor 12, a string Connecting row 15, supporting capacitor socket 13, fixed panel 14, and side support beam 16 are composed of each component forming a modular integrated structure. The bottom of the device 8 and the bottom of the temperature sensor 11 are connected to the radiator 9, the power unit composite busbar 10 is set on the DC output side of the full-control device 8, and the surge capacitor 12 is installed on the support capacitor socket 13; the full-control device 8 is connected in series The rows 15 are connected in series, and the AC input and output of the full-control device 8 are connected to the side support beam 16 through the row, and the side support beam 16, which plays a fixed role, is made of conductive material and can be used as a conductive row.

The rear part of the power cabinet is provided with a capacitor unit installation part. The capacitor part and the power unit 4, which are expanded according to the requirements of the equipment capacity, have a separate structure. 19, the positive and negative outputs of the capacitor unit 5 are connected to the plug 20, and the discharge resistor 21 is installed on the plug.

Example

See Figures 1 to 4, a high power density modular static var generator power cabinet, mainly composed of a cabinet body 1, a power unit 4, a capacitor unit 5 and a fan 2, and the power cabinet consists of three rows of power units 4 and the corresponding Composed of capacitor units 5, a plurality of power units 4 are arranged vertically side by side, each row corresponds to a phase, and the power units 4 of each phase are connected in series through the power unit series connection row 22; each phase of the power cabinet is an integrated structure arranged up and down integrated structure.

See Figures 5 to 8. The power cabinet is composed of three rows of power units 4 and capacitor units 5. The power units 4 and capacitor units 5 are connected to the plug 20 through the supporting capacitor socket 13 in a plug-in manner.

The rear part of the power cabinet is a capacitor unit 5, which is equipped with a plurality of capacitors 18 for capacity expansion, and the capacitor part expanded according to the demand of equipment capacity and the power unit 4 are connection structures of plug-in strips.

The cooling method of the power cabinet adopts air cooling, the ventilation cooling system fan 2 is set on the top of the power cabinet, and the air inlet 3 is set in front of the cabinet.

As shown in Figure 8, each capacitor unit is composed of 18-capacitor 19-capacitor unit composite busbar 20-plug 21-discharge resistor.

As shown in Figure 7, each power unit consists of a control board 6, a drive board 7, a full-control device 8, a radiator 9, a power unit composite busbar 10, a temperature sensor 11, a surge capacitor 12, a support capacitor socket 13, and a fixed panel 14 , tandem row 15, side support beam 16, handle 17, each device is an integrated structure. The internal components of each power unit 4 are stacked compact structures, the control board 6 is located on the uppermost layer, the full-control device 8 is located at the bottom of the control board 6, the full-control device 8 is connected to the radiator 9, and the full-control device 8 is installed in the power unit On the right side of the composite busbar 10; a breakthrough capacitor 12 is provided above the composite busbar 10 of the power unit. current export function.

The power unit of the utility model adopts a modular integrated structure, each phase is a row of vertically placed power units, the structure is compact, the volume is small, the units are directly connected by busbars, no cable connection is required, and the reliability is high. Low cost; the side support beam of the power unit is used as a fixed beam and a conductive bar, and the control board is fixed on the fixed panel; the power unit and capacitor unit are installed in a free and quick plug-in connection mode, which is convenient for the production reserve, installation, and maintenance of the power unit. Expansion, maintenance and transportation, strong versatility.

Claims (3)

1. A modular static var generator power cabinet, characterized in that it includes a plurality of modular power units arranged side by side vertically, each power unit is connected in series, and each row corresponds to a phase; the three phases of the power cabinet are up and down structures Arranged integrated modular integrated structure; each power unit and the capacitor unit are connected through a plug-in row, and the power units inside the power cabinet are connected through a series connection of power units. 2. A modular static var generator power cabinet according to claim 1, characterized in that, the modular power unit is a stacked structure, mainly composed of a control board, a drive board, a fully controlled device, Composed of radiator, power unit composite busbar, temperature sensor, surge capacitor, serial connection row, support capacitor socket, fixed panel, side support beam, each component forms a modular integrated structure, the control board is located on the uppermost layer, fully controlled The type device is located at the lower part of the drive board, the bottom of the full-control device and the bottom of the temperature sensor are connected to the radiator, the composite busbar of the power unit is set on the DC output side of the full-control device, and the surge capacitor is installed on the supporting capacitor socket; the full-control device passes through The AC input and output of the fully controlled device are connected in series to the side support beam made of conductive material through the series. 3. A modular static var generator power cabinet according to claim 1, characterized in that, the rear of the power cabinet is provided with a capacitor unit installation part, and the expanded capacitor part and power The unit is a split structure, and the way of leading out the capacitor is two-way. The capacitors are connected through the composite busbar of the capacitor unit. The positive and negative outputs of the capacitor unit are connected to the plug, and the discharge resistor is installed on the plug.

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