KR20200107511A - Hybrid ground equipment installed on the ground - Google Patents

Abstract

The present invention relates to a semi-underground hybrid ground device with a semi-underground structure including a semi-underground transformer (110) installed to be semi-embedded on the underground, and a switchgear (120) mounted on an upper part of the transformer (110). The present invention has the effect of reducing construction cost and time by integrating ground devices, reducing transportation cost and maintenance cost, improving work efficiency in accordance with a reduction in the number of installations, and reducing maintenance and inspection costs.

Description

Ring-shaped hybrid ground equipment {HYBRID GROUND EQUIPMENT INSTALLED ON THE GROUND}

The present invention relates to a ring-shaped hybrid ground device, and more particularly, to a ring-shaped hybrid ground device integrating and integrating switchgear and transformers installed on the ground for operation of an underground distribution line.

In an underground area, a number of ground switches and circuit breakers (hereinafter referred to as switchgear) are required for operation, separation and protection cooperation of an underground distribution line, and a number of ground transformers (hereinafter referred to as transformers) are required to supply power to customers.

However, these ground devices are installed at different locations on the side of the road or sidewalk, causing various problems.

The first problem is that as each switchgear and transformer are installed, material transportation costs and construction costs increase at the time of initial installation, maintenance costs after installation are also doubled, and failure probability increases.

The second problem is that the PT (Potential Transformer) for power supply to the control unit is required during automatic operation of switchgear, resulting in increased material costs, power failure of the distribution line caused by the PT's own failure, and the outer box due to unnecessary space occupancy inside the switchgear. It increases, and eventually the occupied area and equipment cost increase.

The third problem is that for automatic operation of ground equipment, terminal devices, modems, control/power cables, spare batteries, etc. are installed for each device of switchgear and transformer, so material costs, construction costs, communication and maintenance costs are more than doubled. And, by using parts for each ground device, it occupies excessive storage space inside the enclosure.

The fourth problem is that the installation area is excessive due to the installation of switchgear and transformers, which hinders the aesthetics of the city center, causes relocation complaints due to infringement of the view right of the shopping mall, and complaints for inconvenient traffic due to the installation of sidewalks are constantly occurring. It will be paid by double.

Patent Document 1: Korean Patent Registration No. 1784654 (registered on September 27, 2017)

Therefore, the object of the present invention is to solve the problems of occupancy, civil complaints, and costs arising from the installation of a large number of switchgear and transformers in an underground distribution line area, and integrate and integrate switchgear and transformers to prevent wide-area power outages caused by PT failure. It is to provide a ring-shaped hybrid ground equipment.

According to a feature of the present invention for achieving the object as described above, the present invention is a ring-shaped structure including a ring-shaped transformer installed to be semi-buried underground, and a switchgear flow mounted on the top of the transformer.

A control unit for automatic operation of the switchgear, a terminal device for remote control of the switchgear, a communication modem, and a spare battery are further included, and the control unit, the communication modem, the terminal device, and the spare battery are taken out from the low voltage side of the transformer. It receives power through one cable.

The switchgear includes four or more switches and cut-off circuits, the circuits are connected to the input side high voltage cable, the output side high voltage cable, branch and high voltage customer, and the other circuit is connected to the transformer to supply power and It is used as a transformer-only circuit that supplies power to the circuit.

A high-voltage side elbow is provided on the front side of the transformer, and a part of the high-side elbow on the front side of the transformer is connected to a transformer-only circuit provided on the front side of the switch.

The rest of the high voltage side elbow on the front side of the transformer is connected to another transformer.

Power is supplied to the customer at low voltage through a low voltage cable connected to the low voltage side of the transformer.

The transformer includes a CT sensor that senses the current of a low voltage cable connected to the low voltage side.

The transformer is equipped with a voltage terminal for each low voltage phase to check the voltage on the low voltage side.

It includes a foundation having a space part buried in the ground and opening to an upper portion and a conduit port for entering and withdrawing cables, and the transformer is installed semi-embedded from the basement in the space part of the foundation.

The foundation has a seating support for separating the transformer from the bottom surface of the foundation.

It is installed on the upper portion of the base and includes an enclosure covering the transformer and the switch, and the enclosure has a rectangular shape with no corners.

The ring-shaped structure maintains the ground clearance similar to the existing ground equipment.

In the present invention, the switchgear and the transformer are integrated and integrated and installed on a ring to maintain the ground clearance similar to the existing ground equipment, and the switchgear and the transformer are configured to have the same performance as before. In addition, the present invention is configured to eliminate the possibility of failure by removing the installation of additional components such as CL fuse and PT in advance.

Therefore, the present invention has the effect of solving the problems of occupancy, civil complaints, and costs caused by the installation of a large number of switchgear and transformers in an underground distribution line area, and preventing a wide area power failure due to PT failure.

In addition, since the present invention integrates the switchgear and the terminal device of the transformer and the communication modem into one, not only cost reduction, but also by monitoring low-voltage voltage and current, it is easy to determine failure, shorten failure recovery time, and facilitate facility maintenance. It can have an effect.

In addition, the present invention has the effect of reducing construction cost and construction time by integrating ground equipment, reducing transportation cost and maintenance cost during construction, improving work efficiency and reducing maintenance and inspection costs according to the reduction in the number of installations. have.

1 is a diagram showing the installation configuration of a conventional transformer and switchgear.
Figure 2 is a front view showing a state in which the ring-shaped hybrid ground equipment according to the present invention is installed on the ring.
Figure 3 is a front perspective view showing a ring-shaped hybrid ground device according to the present invention.
Figure 4 is a perspective view showing only the transformer and switchgear in the ring-shaped hybrid ground equipment according to the present invention.
Figure 5 is a plan view of Figure 4;
6 is an installation configuration diagram of a ring-shaped hybrid ground apparatus according to the present invention.
7 is a configuration diagram for explaining the operation of the ring-shaped hybrid ground apparatus according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to help understanding of the present invention, the configuration in which the existing ground equipment is installed will be first briefly described.

As shown in FIG. 1, existing ground equipment is operated with switchgear and transformers, which are each type of equipment, at different installation locations. Switchgear and transformers are equipped with terminal devices, modems, control/power cables, and spare batteries for each device, and parts are used for each ground device. Therefore, the existing ground equipment rapidly increases the material cost, construction cost, communication and maintenance cost, and occupies an excessive amount of internal storage space. In particular, existing ground equipment has problems such as obstruction of the aesthetics of the city center and infringement of the viewing area of the shopping mall due to the excessive installation area due to the installation of switchgear and transformer respectively.

The ring-shaped hybrid ground equipment of the present invention to solve these problems maintains the ground clearance similar to the existing ground equipment by integrating and integrating transformers and switchgears respectively installed on the ground for operation of underground distribution lines, and installing them on a ring. do. In addition, the ring-shaped hybrid ground device of the present invention is configured so that the switchgear and the transformer have the same performance as before.

Specifically, as shown in FIG. 2, the ring-shaped hybrid ground device (hereinafter referred to as'ground device') 100 of the present invention includes a ring-shaped transformer 110 and a transformer 110 installed to be semi-buried underground. Includes a switchgear 120 mounted on the top of ).

The ground equipment 100 integrated by integrating the transformer 110 and the switchgear 120 is installed on the foundation 10 buried in the ground. The foundation 10 is formed by combining two upper and lower foundations, and includes a space 11 opened to an upper portion and a plurality of conduit openings 13 for entering and withdrawing cables. The transformer 110 is installed in the space 11 of the foundation 10 so as to be buried half from the basement.

The base 10 is provided with a mounting support 15 for separating the transformer 110 from the bottom surface of the base 10. The seating support 15 supports the bottom surface of the transformer 110 at the set position of the base 10 so that the transformer 110 is spaced apart from the bottom surface of the base 10 by a predetermined distance. When the transformer 110 is separated from the bottom surface of the base 10, it is easy to insert and take out the cable into the conduit 13, and it is easy to install the ground equipment 100 in a ring-shaped structure. The ring-shaped structure maintains the ground clearance of the ground equipment 100 of the present invention similar to that of the existing ground equipment.

An enclosure 170 is installed on the upper part of the base 10. The enclosure 170 covers and protects the transformer 110 and the switchgear 120.

As shown in FIG. 3, the enclosure 170 may have a rectangular shape with no corners. Alternatively, the square-shaped enclosure 170 having no corners has a high stability and minimizes heterogeneity from the existing rectangular enclosure while making the appearance beautiful. Of course, the enclosure 170 may adopt a square shape with an angled corner.

The enclosure 170 is provided with a cover 171 on the front side. The cover 171 is for maintenance, replacement, manual operation, etc. of the ground equipment 100. Manual operation, maintenance, etc. of the ground device 100 may be performed by an operator by opening the cover 171 of the enclosure 170 near the front of the ground device 100.

The switchgear 120 includes a plurality of switchgear and circuit breakers. A number of switchgear is a power facility that serves as a switch that connects or blocks the current flow of a high-voltage line or switches the connection of an electric circuit, and a circuit breaker blocks the flow of current to prevent accidents caused by abnormal current flow. It is a power facility.

The switchgear 120 includes four or more switches and cut-off circuits (hereinafter referred to as'circuits') on the front and rear surfaces. The circuits of the switchgear 120 are connected to the input side (power side) high-voltage cable (L1), the output side (load side) high-voltage cable (L2), the branch and high-voltage customer's high-voltage cable (L3), and the other circuit is the transformer 110 ) And a cable (L4) to supply power and to supply power to the circuit of the transformer (see Figs. 6 and 7).

In the embodiment, the switchgear 120 includes four switches and a cut-off circuit. The four switches and cut-off circuits may be divided into a first circuit 121, a second circuit 122, a third circuit 123, and a fourth circuit 124. The first circuit 121 is connected to the input-side high-voltage cable (L1), the second circuit 122 is connected to the output-side high-voltage cable (L2), and the third circuit (123) is a branch and high-voltage customer-side high-voltage cable (L3). ). The fourth circuit 124 is connected to the transformer 110 by a cable L4 and used as a transformer-only circuit (see FIGS. 6 and 7 ).

The transformer 110 is a power facility that serves to lower the voltage of the high-voltage current.

The transformer 110 connection circuit of the switchgear 120 can be divided into two types. One is that the fourth circuit 124 is configured as a general circuit, and can be used in a place where one switchgear and one transformer are installed. The other is that the fourth circuit 124 is configured as a transformer-only protection circuit, and the CL fuse, which is a protection device built into the transformer, can be omitted, thereby minimizing the transformer failure factor and improving economic efficiency. The second case is applicable to systems in which the transformer is configured in series.

As shown in FIG. 4, the transformer 110 has a high-voltage side elbow 111 connected to the high-voltage side on the front side, and a part of the high-side elbow 111 on the front side of the transformer 110 is a switch flow 120 ) Is connected to the transformer-only circuit 124 provided on the front side. The remaining high-voltage side elbow 111 on the front side of the transformer 110 may be connected to another transformer (see reference numeral 110 ′ in FIG. 7) therein. This makes it possible to construct a series system with other transformers.

The transformer 110 includes a low-voltage side 115 with a low voltage on the front side. The transformer 110 may supply power at a low voltage to a customer through a low voltage cable L7 connected to the low voltage side 115.

Meanwhile, the ground device 100 further includes a control unit 130, a terminal device 140, a communication modem 150, and a spare battery 160. The control unit 130 is for automatic operation of the switchgear 120. The terminal device 140 and the communication modem 150 are for remote control of the switchgear 120 and communication with the transformer 110. The spare battery 160 is for supplying spare power to the controller 130, the terminal device 140, and the communication modem 150 in an emergency situation in which power supply is cut off.

In the above-described ground equipment 100, a transformer 110 is mounted at the lower part, and a switchgear 120, a control unit 130, a terminal device 140, a communication modem 150, and a spare battery 160 are mounted on the upper part thereof. It has an integrated, integrated structure. The integrated and all-in-one structure reduces the occupied area of the ground equipment 100 and reduces maintenance and inspection costs due to a reduction in the number of installations.

As shown in FIGS. 4 and 5, in the ground device 100 of the embodiment, a control unit 130 is installed in a fixed case disposed on one side of the opening and closing air flow 120, and a terminal device 140 is installed in a fixed case disposed on the opposite side. ) And the communication modem 150 may be installed.

The control unit 130, the terminal device 140, the communication modem 150, and the spare battery 160 receive power through a low voltage cable L6 drawn from the low voltage side of the transformer 110.

5, the first circuit 121, the second circuit 122, and the third circuit 123 of the switch flow 120 are exposed to the rear surface of the switch flow 120, and the fourth In the circuit 124, a terminal may be exposed to the front of the switchgear 120. Each of the circuits 121, 122, 123, 124 is a three-phase, so that three high-voltage cables L1, L2, L3, and L4 can be connected to each of the circuits 121, 122, 123, 124.

The high-voltage side and the low-voltage side 115 of the transformer 110 may be provided on the front side of the transformer 110. The directions and positions in which the terminals of each circuit 121, 122, 123, 124 are exposed in the ground device 100 of the embodiment are for a compact configuration of a cable connection, so they are not necessarily limited by the above embodiment, and the design can be changed as needed. .

For example, in the case of a switch consisting of four circuits, it may be configured to expose the terminals of two circuits from the front side of the switch and to expose the two circuit terminals from the rear side. It can be configured to expose the terminals of one circuit and expose the terminals of three circuits from the rear side.

Hereinafter, a configuration for the operation of a ring-shaped hybrid ground apparatus will be described with reference to FIGS. 6 and 7.

As shown in FIGS. 6 and 7, the ground equipment 100 includes a ring-shaped transformer 110 in the lower part, and the switchgear 120, the control unit 130, the terminal device 140, and a communication modem in the upper part. It consists of 150 and a spare battery 160.

The switchgear 120 in the upper part is equipped with 4 or more switches and cut-off circuits on the front and rear sides, and these circuits are the input side (power side) high-voltage cable (L1), the output side (load side) high-voltage cable (L2), and branch and high-voltage It is connected to the customer's high-voltage cable (L3). In addition, the remaining fourth circuit 124 is a transformer-only circuit and is connected to the ring-shaped transformer 110 installed below to supply power and power to the transformer circuit.

The output side (load side) high-voltage cable L2 is connected to other switchgear.

The high voltage side elbow 111 on the front side of the transformer 110 is connected to the fourth circuit 124 on the front side of the switch flow 120. And the rest of the high-voltage side elbow on the front side is connected to another transformer 110', so that a series system configuration is possible.

The low voltage cable L7 connected to the low voltage side of the transformer 110 supplies power to the customer at low voltage. In addition, the low voltage cable L6 connected to the low voltage side of the transformer 110 may be connected to the controller 130 of the switchgear 120 to supply the low voltage power 220V to the controller 130. Accordingly, the terminal device 140 and the communication modem 150 may also receive power.

Specifically, when the automatic operation of the switchgear 120, the PT (Potential Transformer) used to supply power to the control unit 130 is removed, and the ring-shaped transformer 110 is installed under the switchgear 120 and is constantly operating. ), the low-voltage cable (L6) is pulled out from one of the low-voltage side of the phase and the N-phase, connected to the control unit 130, and then supplied with power.

The transformer 110 includes a CT sensor 117 for sensing the current of the low voltage cable L7 connected to the low voltage side. The CT sensor 117 senses the current flowing through the low voltage cable L7 and transmits it to the transformer 110. The transformer 110 is equipped with a voltage terminal 118 for each low voltage phase (P1, P2, P3) to check the low voltage side voltage. The voltage terminal 118 detects the low-voltage phase-specific voltage and transmits it to the transformer 110.

The transformer 110 may transmit current and low voltage phase-specific detection results to the server through the terminal device 140 and the communication modem 150. The server can detect the current and low-voltage phase-specific voltage of the low-voltage cable L7 through the transmitted detection result, and can manage ground equipment and detect faulty facilities.

Since the above-described ground equipment enables automated operation with one terminal device and one communication modem, construction cost, material cost, and maintenance cost can be reduced by 1/2.

In addition, the above-described ground equipment has a function of determining the current direction, so that the fault point of the distributed power facility line can be accurately determined.

The above-described ground equipment of the present invention integrates and integrates switchgear and transformers, and reduces ground clearance, thereby preventing civil complaints for installation of ground equipment in an urban area and solving the difficulty of securing occupied space.

In addition, the ground equipment of the present invention can eliminate the possibility of failure by removing the installation of additional parts such as CL fuse and PT in advance.

In addition, the ground equipment of the present invention can prevent a worker's safety accident by simplifying the installation process and improve work efficiency.

In addition, the ground equipment of the present invention has the effect of saving cost during the installation period by reducing the cost of material transportation and storage convenience and reducing the number of occupied objects, reducing the installation time, and reducing the maintenance and inspection costs by reducing the number of installations. have.

The present invention has been disclosed in the drawings and the specification, the best embodiments. Here, specific terms have been used, but these are only used for the purpose of describing the present invention, and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, the present invention will be understood by those of ordinary skill in the art that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true scope of the technical rights of the present invention should be determined by the technical idea of the appended claims.

10: foundation 11: space
13: pipeline 15: settlement support
100: ground equipment 110: transformer
111: high-side elbow 112: remaining high-side elbow
L1,L2,L3,L4,L5: high voltage cable 115: low voltage side
L6,L7,L8: low voltage cable 117: current transformer
118: voltage terminal 120: switchgear
121,122,123: first to third circuit
124: fourth circuit (transformer dedicated circuit)
130: control unit 140: terminal device
150: communication modem 160: spare battery
170: enclosure 171: cover

Claims (12)

A ring-shaped transformer installed half-buried underground,
A ring-shaped hybrid ground equipment having a ring-shaped structure including a switchgear mounted on the upper part of the transformer. The method according to claim 1,
A control unit for automatic operation of the switchgear;
A terminal device and a communication modem for remote control of the switch and communication of the transformer; And
It further includes a spare battery,
The control unit, the communication modem, the terminal device, and the spare battery are ring-shaped hybrid terrestrial devices that are supplied with power through a cable drawn from the low voltage side of the transformer. The method according to claim 1,
The switchgear is
Includes 4 or more switches and cut-off circuits,
The circuits are connected to the input side high voltage cable, the output side high voltage cable, branch and high voltage customer,
The remaining one circuit is connected to the transformer to supply power and a ring-shaped hybrid ground device used as a transformer-only circuit that supplies power to the circuit of the transformer. The method of claim 3,
A high-voltage side elbow is provided on the front side of the transformer,
A ring-shaped hybrid ground device in which a part of the high-voltage side elbow of the front of the transformer is connected to a transformer-only circuit provided on the front of the switch. The method of claim 4,
The rest of the high-voltage side elbow on the front of the transformer is a ring-shaped hybrid ground device connected to another transformer. The method according to claim 1,
Ring-shaped hybrid ground equipment that supplies power at low voltage to customers through a low voltage cable connected to the low voltage side of the transformer. The method according to claim 1,
The transformer is a ring-shaped hybrid ground equipment comprising a CT sensor for sensing a current of a low voltage cable connected to the low voltage side. The method according to claim 1,
The transformer is a ring-shaped hybrid ground equipment equipped with a voltage terminal for each low-voltage phase to check a low-voltage side voltage. The method according to claim 1,
It includes a foundation having a space portion buried in the ground and opening to an upper portion, and a conduit port for entering and withdrawing cables,
A ring-shaped hybrid ground equipment in which the transformer is installed in a space part of the foundation so that the transformer is semi-buried from the basement. The method of claim 9,
The base is a ring-shaped hybrid ground equipment having a seating support for separating the transformer from the bottom surface of the base. The method of claim 9,
A ring-shaped hybrid ground aircraft device having an enclosure installed above the base and covering the transformer and the switch, wherein the enclosure has a rectangular shape with no corners. The method according to claim 1,
The ring-shaped structure is a ring-shaped hybrid ground equipment that maintains the ground clearance similar to the existing ground equipment.

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