CN215897077U - SVG equipment - Google Patents

Abstract

The utility model relates to an SVG device, which integrates a starting cabinet and a power cabinet in the same box body and carries out reasonable layout, and uses insulating plates of the starting cabinet and the power cabinet to jointly form a middle air duct, thereby improving the space utilization rate and the ventilation effect of the device. According to the technical scheme provided by the utility model, the main frame of the power cabinet is matched with the insulating cross beam by adopting the insulating longitudinal beams, so that the requirements on electrical gaps and creepage distances among power units and between phases of the power units are met. The power cabinet part and the starting cabinet part are integrated into one cabinet body, so that the whole set of equipment is more compact in structure and smaller in size. The power cabinet part and the starting cabinet part share the middle air duct, so that the normal heat dissipation of the equipment is ensured, and the number of fans of the equipment is reduced.

Description

SVG equipment

Technical Field

The utility model relates to the technical field of power equipment, in particular to SVG equipment.

Background

With the increasing proportion of new energy power generation such as wind power generation, photovoltaic power generation and the like in an energy supply structure, the control requirement on the quality of electric energy is also increased continuously. Static Var Generator (hereinafter referred to as "SVG") products have good inhibition and compensation effects on the problems of unqualified grid-connected power factors, voltage deviation, voltage fluctuation, flicker and the like which may exist in wind power generation and photovoltaic power generation, so that SVG equipment is more and more widely applied to the field of new energy power generation.

With the progress of technology and the continuous improvement of user requirements, the power density is higher, the occupied area is smaller, and the cost is lower, which is a necessary direction for the development of the SVG device. The starting cabinet part and the power cabinet part in the common SVG equipment in the prior art are often all independent cabinets, the power cabinet has independent heat dissipation air ducts of own, the starting cabinet also designs independent fans, however, the above design has the following disadvantages:

(1) the power cabinet and the starting cabinet are independent, the whole set of equipment occupies a large area, and the whole integration level is not high.

(2) The power cabinet contains independent wind channel and fan, and the start-up cabinet contains independent fan, and the fan is more in quantity.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide the SVG equipment, which has the advantages of reasonable layout, compact structure, low cost and the like, and the power density of the whole set of equipment is improved and the overall size of the equipment is reduced through the reasonable layout of the parts in the equipment.

In order to achieve the above object, according to one aspect of the present invention, there is provided an SVG device, including an SVG box, and a start-up cabinet, an air duct and a power cabinet located in the SVG box; wherein,

the box body comprises a box door, an electrified display and an isolating switch operating handle are arranged on the box door, and the position in the box body, which is close to the box door, is the front part of the box body;

the starting cabinet is positioned at the front part of the box body;

the air duct is positioned in the middle of the box body, and the top of the air duct is provided with a fan;

the power cabinet is positioned at the rear part of the box body.

Furthermore, the starting cabinet comprises an isolating switch and a contactor which are positioned on the upper portion, a Hall element, a current transformer and a soft starting resistor which are positioned in the middle portion, an electric reactor which is positioned on the lower portion, and a lightning arrester which is positioned on the bottom portion.

Furthermore, the starting cabinet further comprises an incoming line copper bar, the input end of the incoming line copper bar is connected with the incoming line end of the bottom of the starting cabinet, and the output end of the incoming line copper bar is connected to the incoming line end of the isolating switch through a cable.

Furthermore, the wire outlet end of the isolating switch is connected with the wire inlet end of the contactor through a cable, and the wire outlet end of the contactor penetrates through the Hall element and the current transformer and then is connected with the reactor.

Further, the lightning arrester is connected with the incoming line copper bar.

Further, a first insulating plate is arranged on the rear side of the starting cabinet.

Furthermore, the power cabinet comprises a three-phase power unit, three layers of transverse insulating beams and a plurality of longitudinal insulating beams;

the three-phase power units are respectively arranged on three layers of transverse insulating beams, and the three layers of transverse insulating beams are respectively connected with the plurality of longitudinal insulating beams.

Furthermore, the outlet ends of the reactor are respectively connected to the three-phase power unit from two sides of the power cabinet.

Furthermore, a second insulating plate is arranged at the rear part of the three-phase power unit, and a third insulating plate is arranged at the side part of the three-phase power unit.

Furthermore, the first insulating plate, the second insulating plate and the third insulating plate form an air duct.

In summary, the utility model provides an SVG device, in which the start-up cabinet and the power cabinet are integrated in the same box body and reasonably arranged, and the insulation plates of the start-up cabinet and the power cabinet are used to form a middle air duct, so as to improve the space utilization rate and the ventilation effect of the device. According to the technical scheme provided by the utility model, the main frame of the power cabinet is matched with the insulating cross beam by adopting the insulating longitudinal beams, so that the requirements on electrical gaps and creepage distances among power units and between phases of the power units are met. The power cabinet part and the starting cabinet part are integrated into one cabinet body, so that the whole set of equipment is more compact in structure and smaller in size. The power cabinet part and the starting cabinet part share the middle air duct, so that the normal heat dissipation of the equipment is ensured, and the number of fans of the equipment is reduced.

Drawings

FIG. 1 is an electrical schematic diagram of the SVG device of the present invention;

FIG. 2 is a side view of the SVG device of the present invention;

FIG. 3 is a schematic diagram of the start-up cabinet;

FIG. 4 is a schematic diagram of a power cabinet;

FIG. 5 is a schematic view of the construction of the air chute;

fig. 6 is a schematic structural diagram of the air duct composed of the insulating plates.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The utility model provides an SVG device, an electrical schematic diagram of the SVG device is shown in FIG. 1, as shown in FIG. 1, three-phase alternating currents U1, V1 and W1 are input through an isolating switch QS and are respectively connected to a three-phase power unit A, B, C after passing through a contactor KM and a reactor L1; two ends of a contactor of each phase circuit are connected with soft starting resistors R1-R3 in parallel; the three-phase input line is also respectively connected with Hall elements LEM1-LEM3 and current transformers CT1-CT3 in series to monitor the input current; the output end of the three-phase power unit A, B, C is connected with a reactor L2; the three-phase input lines are all connected to a lightning arrester FV.

The utility model provides a reasonable equipment layout structure aiming at the small-capacity SVG. A side view of the SVG device is shown in fig. 2, hiding the side panels of the device and the upper closure panel on the power cabinet side to more clearly show the overall portion of the SVG device. This SVG equipment includes the SVG box to and start cabinet, wind channel and the power cabinet that is located this SVG box. The box body comprises a box door, an electrified display and an isolating switch operating handle are arranged on the box door, and the position in the box body, which is close to the box door, is the front part of the box body; the starting cabinet is positioned at the front part of the box body; the air duct is positioned in the middle of the box body; the power cabinet is positioned at the rear part of the box body.

Fig. 3 shows a schematic structural diagram of a starting cabinet, which includes an isolating switch 1 and a contactor 2 at the upper part, a hall element 3, a current transformer 4 and a soft starting resistor 8 at the middle part, a reactor 6 at the lower part, and a lightning arrester 7 at the bottom part. The starting cabinet further comprises an incoming line copper bar 5, the input end of the incoming line copper bar 5 is connected with the incoming line end of the bottom of the starting cabinet, and the output end located at the upper end of the incoming line copper bar 5 is connected to the incoming line end of the isolating switch 1 through a cable. The outlet end at the bottom of the isolating switch 1 is connected with the inlet end at the upper part of the contactor 2 through a cable, the outlet end at the lower part of the contactor 2 is connected with the reactor 6 after passing through the hall element 3 and the current transformer 4, and the number of the reactors 6 can be 2, for example. And the lightning arrester 7 positioned at the bottom of the starting cabinet is directly connected with the incoming line copper bar 5. And a first insulating plate 11 is arranged at the rear side of part of the starting cabinet and is used as one side of the middle air duct. Also shown in this fig. 2, a fan 10 is provided at the top of the duct.

A schematic structural diagram of a power cabinet is shown in fig. 4, and the power cabinet comprises A, B, C three-phase power cells 16, three layers of transverse insulating beams 17, and a plurality of longitudinal insulating beams 14. The three-phase power units are respectively arranged on three layers of transverse insulating beams, and the three layers of transverse insulating beams are respectively connected with the plurality of longitudinal insulating beams. By adopting the structural form of the insulating beam main frame, the installation strength and stability are ensured, and meanwhile, the requirements of electrical clearance and creepage distance between power units and between phases of the power units can be ensured. The power cabinet part takes an insulating beam as a main frame, a metal slideway 13 is arranged on a transverse insulating beam 17, a positioning round hole is designed at the rear part of the slideway 13, and a nut is riveted at the front part of the slideway. When the power unit 16 is installed, the power unit 16 is pushed in from the front of the slideway 13, a guide pin at the rear of the power unit 16 is inserted into a round hole at the rear of the slideway, and the power unit 16 is fixed on a slideway riveting nut after the module is pushed in place. The outlet terminals of the reactor 6 in the starting cabinet are respectively connected to the three-phase power units 16 from two sides of the power cabinet, and the three-phase power units 16 are connected with each other through connecting copper bars 18. The rear part of the three-phase power unit is also provided with a second insulating plate 12, the side part of the three-phase power unit is provided with a third insulating plate 15, the second insulating plate 12 is tightly attached to the power unit 16, the insulating plate is provided with a hole corresponding to the module radiator, and the insulating plates 15 on the two sides of the power cabinet part and the first insulating plate 11 on the starting cabinet part are combined to form a radiating air duct together. Fig. 5 shows a schematic structural diagram of an air duct, fig. 6 shows a schematic structural diagram of an air duct composed of insulation boards together, through the design of the air duct, the first insulation board 11 on the rear side of the starting cabinet portion, the second insulation board 12 on the rear side of the power cabinet portion, and the third insulation board 15 on the side portion together form the air duct, the fan 10 is placed on the top, cold air is sucked from the front of the power cabinet, after passing through the power unit radiator, the heat of the IGBT in the power unit is taken away, and hot air is discharged from the top through the middle air duct; the hot air in the partial cabinet of the starting cabinet is also exhausted from the top of the power cabinet through the middle air duct. The power cabinet part and the starting cabinet part share the fan through reasonably designing air ducts, so that the total overall size of the equipment is reduced, the number of the fans is reduced, and the equipment cost is reduced.

The installation of the SVG device may be performed as follows:

(1) a second insulating plate 12 for mounting the rear part of the power cabinet part;

(2) a first insulating plate 11 at the rear of the starting cabinet part is installed;

(3) installing a plurality of longitudinal insulating beams 14 and three layers of transverse insulating beams 17 of the power cabinet part, and then installing a module metal slideway 13;

(4) mounting the three-phase power units 16 on the metal slide way 13, and connecting the connecting copper bars 18 among the power units 16;

(5) installing a main loop device of a starting cabinet part:

(6) installing a reactor 6;

(7) installing an isolating switch 1;

(8) installing a contactor 2;

(9) installing a Hall element 3, a current transformer 4 and a soft start resistor 8;

(10) installing a lightning arrester 7;

(11) completing the wiring of the main loop;

(12) installing a top fan 10;

(13) and an electrified display on the side plate of the box body and the door plate of the box body is installed, and is connected with an isolating switch handle 9, so that the box body assembly is completed finally.

In summary, the utility model provides an SVG device, in which the start-up cabinet and the power cabinet are integrated in the same box body and reasonably arranged, and the insulation plates of the start-up cabinet and the power cabinet are used to form a middle air duct, so as to improve the space utilization rate and the ventilation effect of the device. According to the technical scheme provided by the utility model, the main frame of the power cabinet is matched with the insulating cross beam by adopting the insulating longitudinal beams, so that the requirements on electrical gaps and creepage distances among power units and between phases of the power units are met. The power cabinet part and the starting cabinet part are integrated into one cabinet body, so that the whole set of equipment is more compact in structure and smaller in size. The power cabinet part and the starting cabinet part share the middle air duct, so that the normal heat dissipation of the equipment is ensured, and the number of fans of the equipment is reduced.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. An SVG device, characterized in that it comprises an SVG box, and a startup cabinet, an air duct and a power cabinet located in the SVG box; wherein, The box body includes a box door, and a live display and an isolation switch operating handle are arranged on the box door, and the position close to the box door in the box body is the front part of the box body; the starting cabinet is located at the front of the box; The air duct is located in the middle of the box body, and a fan is arranged on the top thereof; The power cabinet is located at the rear of the box. 2. The SVG device according to claim 1, characterized in that, the starting cabinet comprises an isolation switch and a contactor located in the upper part, a Hall element, a current transformer and a soft-start resistor located in the middle part, and a reactor located in the lower part. , and the arrester at the bottom. 3 . The SVG device according to claim 2 , wherein the starting cabinet further comprises an incoming wire copper bar, the input end of the incoming wire copper bar is connected to the incoming wire end at the bottom of the starting cabinet, and the output end passes through the wire. 4 . The cable is connected to the incoming terminal of the disconnect switch. 4. The SVG device according to claim 3, wherein the outgoing end of the isolating switch is connected to the incoming end of the contactor through a cable, and the outgoing end of the contactor is connected to the reactance after passing through the Hall element and the current transformer. device. 5 . The SVG device according to claim 4 , wherein the arrester is connected to the incoming copper bar. 6 . 6 . The SVG device according to claim 5 , wherein a first insulating plate is provided on the rear side of the starting cabinet. 7 . 7. The SVG device according to claim 6, wherein the power cabinet comprises a three-phase power unit, a three-layer transverse insulating beam, and several longitudinal insulating beams; The three-phase power units are respectively arranged on three-layer transverse insulating beams, and the three-layer transverse insulating beams are respectively connected with a plurality of longitudinal insulating beams. 8 . The SVG device according to claim 7 , wherein the outgoing ends of the reactor are respectively connected to the three-phase power unit from two sides of the power cabinet. 9 . 9 . The SVG device according to claim 8 , wherein a second insulating plate is arranged at the rear of the three-phase power unit, and a third insulating plate is arranged at the side. 10 . 10 . The SVG device according to claim 9 , wherein the first, second and third insulating plates form an air duct. 11 .

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