KR100734334B1 - Simple power receiving and transforming device - Google Patents

Abstract

A gas insulated type power receiving and transforming apparatus is provided to repair a power fuse for transformer protection safely by breaking the power fuse for the transformer protection when an accident occurs in a secondary side of the transformer. An inlet hole(11) receives power from a distribution cable of an external terminal. An automatic interval switch(13) is connected to a lower part of the inlet hole(11). A lightning arrester(15) is connected to a lower part of the automatic interval switch(13). A power fuse for transformer protection(17) is connected to a lower part of the automatic interval switch(13). A transformer for power supply(19) is connected to a lower part of the power fuse for transformer protection(17). An energy meter(21) is connected to the transformer for power supply(19), and measures a current quantity. A power fuse for converter protection(23) is connected to a lower part of the transformer for power supply(19). A first side of a converter(27) is connected to a lower part of the power fuse for converter protection(23). A main breaker(29) is connected to a second side of the converter(27). A plurality of breakers for cable distribution(31) is connected to a lower part of the main breaker(29) and breaks a load. The automatic interval switch(13), the lightning arrester(15), the power fuse for transformer protection(17), the transformer for power supply(19), and the power fuse for converter protection(23) are received in a gas insulated case. The power fuse for transformer protection(17), and the power fuse for converter protection(23) are received to be replaced in the gas insulated case.

Description

Gas Insulated Simple Water Reduction Device {SIMPLE POWER RECEIVING AND TRANSFORMING DEVICE}

1 is a disconnected diagram of a water substation apparatus according to the prior art.

Figure 2 is a disconnected diagram of a gas insulated simple water transformer according to an embodiment of the present invention.

3A to 3C are views of a gas insulated case in a gas insulated simple water transformation apparatus according to an embodiment of the present invention.

Figure 4 is a disconnected diagram of a gas insulated simple water transformer according to another embodiment of the present invention.

5A to 5C are views of a gas insulated case in a gas insulated simple water transformation apparatus according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

1, 1 ': water substation apparatus according to the present invention

3, 3 ': enclosure

11: inlet

13: automatic section switchgear

15: lightning arrester

17: power transformer for transformer current transformer

19: transformer current transformer for power supply

21: integrated power meter

23, 23 ': Power fuse for transformer protection

25, 25 ': gas insulated case

27, 27 ': transformer

29, 29 ': Short-term parking

31, 31 ': Circuit breaker

100: water substation apparatus according to the prior art

The present invention relates to a water substation for receiving high voltage and stepping down to a commercial voltage to supply a building unit or a factory unit, and more specifically, an automatic section switch, an arrester, and a transformer transformer for power transformer protection belonging to a high voltage section. The gas insulated simple transformer unit is designed to increase safety by minimizing the separation distance between each device by storing power supply transformers for transformers and transformers in a single gas insulated case. It is about.

In private electric installations such as buildings and factories, there is a large amount of power demanded, and thus it is impossible to obtain electricity that can be used as it is from a utility company, such as a general electric utility with a low voltage of 110V or 220V.

Therefore, in general private electric facilities, high voltage of 3,300V or 6,600V should be received from power distribution line of substation and transformed into commercial voltage.In particular, in private electric facilities of large buildings, special high voltage of 22.9kV is received and then returned to commercial voltage. The transformer must be transformed, and the device that enables this is a water substation.

Water substation equipment includes a power receiving facility for receiving high voltage and special high voltage supplied from a substation, a substation facility for stepping down high and special high voltage received from a substation to a commercial voltage, and electric equipment, lighting, etc. of each part in the building. Distribution equipment for supplying power, and switch devices and other safety devices are integrally formed to supply electricity safely and efficiently into the building.

1 shows a disconnected diagram of a water substation apparatus 100 according to the prior art.

The high voltage power is received from the substation through the distribution system composed of the overhead distribution line and the underground distribution line to the water substation apparatus 100 of each customer, and the high voltage power supplied in this way is commercially available through the water substation apparatus 100 having the configuration as shown in FIG. It is stepped down to voltage and supplied to the customer.

At this time, there are a number of methods of receiving power using a high-voltage consumer power distribution apparatus, such as a cubicle type using a panel, a frame type for receiving power by installing a frame, and an H-type power receiving method for receiving power using electric poles. The water substation apparatus 100 according to the present invention is a general cubic type extra high voltage water substation apparatus using a panel. As shown in FIG. 1, an inlet 111 receiving power from a power distribution line and an inlet are provided in an enclosure 101. The automatic section switch 113 connected to the downstream of the 111 and installed on the load disconnection line for sending the power supplied through the inlet 111, and downstream of the automatic section switch 113 and connected to the load disconnection line It is connected to the lightning arrester 115 and downstream of the automatic switchgear 113 which is installed to protect the load disconnection line in case of abnormal voltage generation, and for the transformer transformer protection to protect the downstream equipment when the overcurrent is energized. Power transformer 119, which is connected downstream of the power fuse 117 for the transformer current transformer protection, and the measurement of high voltage and high current, and transformer transformer 119 for power supply And a transformer 125 for connecting the integrated power meter 121 for measuring the amount of electric power, the transformer 125 for lowering the received high voltage to a commercial voltage required by the user, connected to the downstream of the transformer current transformer 119 for the power supply and demand system, and a transformer ( Parking downstream 127 connected to the downstream of the 125 and if necessary to cut off the commercial voltage, and a plurality of circuit breaker 129 is connected to the parking terminal 127 and disconnects each load if necessary.

In the case of the water substation apparatus 100 according to the related art having the configuration as described above, the conductors connecting the components are made of bare conductors, so there is a risk of electric shock or accidents caused by animals, especially within one enclosure. As all internal components are accommodated, there is a safety critical problem that the accident range can be expanded to the entire area in the event of an internal accident caused by an arc or the like.

In addition, a relatively large installation area and weight are required to install the water substation, by maintaining sufficient separation distance between the components inside the water substation to secure the insulation distance in consideration of safety such as electric shock. There is also a problem that the installation cost is increased.

In addition, there is a high possibility that the ripple caused by the accident of power fuse is expanded, and there is a problem that it is not easy to replace the power fuse.

Accordingly, an object of the present invention is to increase safety by accommodating the automatic segment breaker, lightning arrester, transformer current transformer protection fuse, power supply instrumentation transformer current transformer and transformer protection power fuse belonging to a special high voltage unit in a single gas insulated case. It is to provide a gas insulated simple water-switching device that enables a compact configuration by minimizing the separation distance between devices.

Another object of the present invention is to provide a gas insulated simple water transformation device which can minimize the spread due to an accident of power fuse and facilitate replacement of power fuse.

An object of the present invention described above is a water substation for receiving high voltage and stepping down to a commercial voltage to supply a building unit or a factory unit, the inlet receiving electric power from a distribution line in an enclosure and downstream of the inlet. A power supply meter connected to a downstream automatic switching device, a lightning arrester connected downstream of the automatic switching device, a transformer current transformer protecting power fuse connected to a downstream of the automatic switching device, and a downstream of the power transformer protection transformer. A transformer transformer, a integrated power meter connected to the transformer transformer transformer for measuring power supply, and a transformer protection power fuse connected downstream of the transformer transformer transformer for power supply and supply, and downstream of the transformer protection power fuse. A transformer connected to a primary side of the transformer, a parking terminal connected to a secondary side of the transformer, and the main A plurality of wiring breakers are connected to downstream of the short circuit and cut off each load if necessary, wherein the automatic section breaker, the lightning arrester, the power transformer for protecting the transformer transformer, the transformer transformer for power supply The power fuse for transformer protection is achieved by providing a gas insulated simple water substation device, which is housed in a gas insulated case.

According to a preferred feature of the present invention, the transformer current transformer and the transformer protection power fuse is externally housed in the gas insulating case.

According to a more preferred feature of the invention, when a plurality of transformers are connected in parallel to the transformer transformer current transformer for power supply, transformer protection power fuses corresponding to the transformers are accommodated in the gas insulation case.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to describe in detail enough to be easily carried out by those skilled in the art to which the present invention pertains. This does not mean that the technical spirit and scope of the present invention is limited.

FIG. 2 shows a disconnection diagram of the gas insulated simple water transformation device 1 according to an embodiment of the present invention, and FIGS. 3A to 3C show a gas insulated simple water transformation device according to an embodiment of the present invention. In 1), a diagram of a gas insulated case 25 is shown.

Water substation apparatus 1 according to the present invention is an automatic section switch 13, lightning arrester 15, transformer current transformer protection power fuse 17, transformer current transformer 19 for power supply, transformer protection power belonging to the special high-pressure unit By storing the fuse 23 in one gas insulated case 25 to increase safety and at the same time to minimize the separation distance between the devices to enable a compact configuration, as shown in Figures 2 to 3c Inlet 11 receives electric power from a distribution line in the enclosure 3, an automatic section switch 13 connected downstream of the inlet 11, and an arrester 15 connected downstream of the automatic section switch 13. And a transformer current transformer for protecting the transformer current transformer connected to the downstream of the automatic segment breaker 13, a transformer transformer for electric power supply and supply connected to the downstream of the transformer fuse protection power fuse 17, and electric power Connection to transformer transformer (19) for supply and demand instrument Integrated power meter 21 for measuring the amount of electric power, a transformer protection power fuse 23 connected downstream of the transformer current transformer 19 for power supply and supply, an automatic section breaker 13, an arrester 15, a transformer transformer The primary side is downstream of the gas insulated case 25 in which the protective power fuse 17, the transformer transformer transformer 19 for power supply and supply, the transformer protection power fuse 23, and the transformer protection power fuse 23 are housed. A transformer 27 to be connected, a parking short circuit 29 connected to the secondary side of the transformer 27, and a plurality of wiring breakers 31 connected downstream of the parking short circuit 29 and blocking each load if necessary. It is made to include.

Here, the inlet 11 is connected to the primary side of the automatic section switch 13 as a part of the high-voltage power supplied from the substation is transmitted through the distribution line.

Downstream of the inlet 11 described above is connected to the automatic section switchgear 13, the automatic section switch 13 serves to automatically open and close the fault section to protect the power system.

In addition, a lightning arrester 15 is installed downstream of the above-described automatic section breaker 13, and the lightning arrester 15 serves to protect the line by flowing the abnormal voltage to the ground through the ground when an abnormal voltage occurs in the line. do.

Downstream of the above-described automatic section breaker 13, a transformer current transformer protection power fuse 17 is connected, which transforms the transformer current protection power fuse 17, while the load current passes safely but is cut off when a current of a predetermined value or more flows to the front end. It prevents accidents from spreading.

Downstream of the above-described transformer transformer protection power fuse 17 is connected to the transformer transformer transformer 19 for power supply and supply, the transformer transformer transformer 19 for the power supply and supply instrument is an integrated power meter (21) in the measurement of high voltage and large current, etc. It is installed between and the electric circuit and plays a role of facilitating measurement of high voltage and high current.

An integrated power meter 21 is connected downstream of the transformer transformer transformer 19 for power supply and supply, and the transformer transformer transformer 19 for power supply serves to measure and record the power passing through the circuit during the flow of time. .

The transformer protection power fuse 23 is connected downstream of the integrated wattmeter 21. The transformer protection power fuse 23 is installed on the primary side of the transformer 27, and the transformer 27 downstream during overcurrent energization. It is installed to protect it.

The above-described automatic section switch 13, lightning arrester 15, power transformer 17 for the transformer current transformer, transformer transformer 19 for power supply and supply, power fuse 23 for transformer protection is one gas insulated case 25 The gas insulating case 25 is formed by hermetically filling an insulating gas such as SF ₆ , for example, and includes an automatic section switch 13, an arrester 15, and a transformer for protecting the transformer. By surrounding the fuse 17, the transformer current transformer 19 for power supply and supply, the power fuse 23 for protecting the transformer, even if an internal accident occurs by an arc or the like so as not to extend to other parts.

In addition, the automatic section switch 13, lightning arrester 15, the transformer current transformer protection power fuse 17, the transformer transformer current transformer 19 for power supply and supply, and the transformer protection power fuse belonging to the special high pressure part in the gas insulation case 25 ( 23) is accommodated and modularized to minimize the separation distance between the devices to enable a compact configuration.

The gas insulation case 25 is preferably provided with a pressure relief valve (not shown) to prevent the gas insulation case 25 from being exploded due to pressure expansion when an internal accident occurs. When the internal pressure of the gas insulated case 25 exceeds a predetermined value, the internal pressure is released to the outside.

Also, as shown in FIGS. 3A to 3C, the transformer current transformer 17 and the transformer protection power fuse 23 are housed in the gas insulated case 25 and the power fuse main body is gas insulated. It is preferable that the outer side of the case 25 is replaceably accommodated in the protruding case so that the outer side of the case 25 is replaceably mounted outside the gas insulated case 25.

The gas insulation case 25 is formed with a first connecting portion 11a to which the inlet 11 is connected and a second connecting portion 23a to which the primary side of the transformer 27 is connected.

Downstream of the above-described transformer protection power fuse 23, the primary side of the transformer 27 is connected, the transformer 27 outputs to the secondary side for stepping down the high voltage of the primary side to a commercial voltage, the transformer 27 Since the secondary side of the low pressure and large capacity, the insulation distance is set narrower than other conductors, and is connected to the parking terminal 29 by using a copper conductor having a large cross-sectional area.

 By the above-described configuration, when an accident occurs on the secondary side of the transformer 27, only the transformer protection power fuse 23 can be shut off and safely repaired and repaired.

The parking circuit breaker 29 is connected to the secondary side of the transformer 27, and the parking circuit breaker 29 controls the total supply of the commercial voltage stepped down by the transformer 27. Use a magnetic circuit breaker.

A plurality of wiring breakers 31 are respectively connected downstream of the parking short circuit 29, and the wiring breakers 31 serve to provide a commercial voltage by determining a branch circuit required.

Although the foregoing description has been described with reference to the water substation 1 having one bank, it further includes another substation B connected in parallel to the downstream of the transformer transformer 19 for power supply and instrumentation. It can be similarly applied to the water substation 1 'having two or more banks. FIG. 4 shows a disconnection diagram of the gas insulated simplified water transformer 1' according to another embodiment of the present invention. 5A to 5B are views of the gas insulated case 25 'in the gas insulated simple water transformer 1' according to another embodiment of the present invention.

As shown in FIGS. 4 to 5C, the gas insulated simple water transformation device 1 ′ according to another embodiment of the present invention is a gas insulated simple water in accordance with an embodiment of the present invention in an enclosure 3 ′. A water substation panel A having a structure similar to the substation apparatus 1 and a substation B connected in parallel to the downstream of the transformer current transformer 19 for power supply and instrumentation are included.

Since the configuration of the water substation A has already been described in the gas insulated simple water conversion apparatus 1 according to the embodiment of the present invention, redundant description thereof will be omitted.

The transformer panel B has a transformer 27 'having a primary side connected to the downstream of the transformer protection power fuse 23', a parking short circuit 29 'connected to a secondary side of the transformer 27', and parking. A plurality of wiring breakers 31 'are included that are connected downstream of the short term 29' and disconnect each load if necessary.

When a plurality of transformers 27, 27 ′ are connected in parallel to the transformer transformer current transformer 19 for power supply and supply, the transformer protection power fuses 23, 23 ′ corresponding to the transformers 27, 27 ′ are gas insulated cases. 25 ', and in this case, the transformer protection power fuses 23, 23' are preferably replaceably mounted outside of the gas insulated case 25 ', as shown in Figs. 5A-5C. Do. According to an embodiment, when the bank is configured of three or more banks, some of the power protection fuses may be installed in the substation board.

In addition, the gas insulation case 25 'is provided with a first connection portion 11a to which the inlet 11 is connected, and second connection portions 23a and 23a' to which the primary sides of the transformers 27 and 27 'are connected, respectively. do.

As described above, according to the gas insulated simple water conversion apparatus according to the present invention, the automatic section switch, lightning arrester, transformer current transformer protection power fuse, transformer transformer current transformer for power supply and supply belonging to a special high-pressure unit and a power fuse for transformer protection Storing in the gas insulated case increases the safety and at the same time has a merit that can be compact configuration by minimizing the separation distance between each device.

In addition, when an accident occurs on the secondary side of the transformer can be safely repaired and repaired by cutting off the power fuse for protecting the transformer.

In addition, since only the busbar part of the power fuse is housed in the gas insulated case and the main body of the power fuse is replaceably housed outside the gas insulated case, it is possible to minimize the ripple caused by the accident of the power fuse and to easily replace the power fuse. It works.

Claims (3)

In the water substation for receiving high voltage and stepping down to the commercial voltage to supply by building unit or factory unit, Power fuse for the inlet receiving power from the distribution line in the enclosure, the automatic section switch connected to the downstream of the inlet, the lightning arrester connected to the downstream of the automatic section switch, and the transformer transformer transformer connected downstream of the automatic section switch. And a transformer transformer for power supply connected to the downstream of the transformer transformer protection fuse, an integrated power meter connected to the transformer transformer for power supply and measuring the amount of power, and the transformer transformer for power supply. A transformer protection power fuse connected downstream, a transformer connected to a primary side downstream of the transformer protection power fuse, a parking terminal connected to the secondary side of the transformer, and a downstream connection of the parking terminal, It consists of a number of circuit breakers for blocking the load of Here, the automatic section breaker, the lightning arrester, the power transformer for protecting the transformer transformer, the transformer transformer for power supply and the transformer power fuse is housed in a gas insulated case, And the transformer current transformer for protecting the transformer and the power fuse for protecting the transformer are housed in the gas insulating case so as to be replaced from the outside. The method of claim 1, And a plurality of transformers connected in parallel to the transformer for current transformer for power supply, the transformer-protected power fuses corresponding to the transformers are housed in the gas insulated case. delete

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