KR100654773B1 - Power receiving and transforming device with power-fuse insulated by gas - Google Patents

Abstract

A power receiving and transforming device with a power-fuse insulated by gas is provided to minimize the scale of accident by safely emitting gas when inner pressure is raised over predetermined pressure. A power receiving and transforming device with a power-fuse insulated by gas includes a power receiving and transforming plate(A) and a power transforming plate(B). In the power receiving and transforming plate(A), an insertion hole(11) receives power from a distribution line. An automatic section switch(13) is connected to the lower part of the insertion hole(11). An arrester(15) and a power fuse(17) are connected to the lower part of the automatic section switch(13). A current transformer for supplying electricity(19) is connected to the lower part of the power fuse(17). A watt-hour meter(21) measures the amount of power by being connected to the current transformer for supplying electricity(19). In the power transforming plate(B), a gas insulation type power fuse(23) has power fuse members(23a,23b) of corresponding number to the power receiving and transforming plate(A) and the power transforming plate(B). The power receiving and transforming plate(A) and the power transforming plate(B) include transformers(25a,25b) connected to the lower parts of the power fuse member(23a,23b), main circuit breakers(27a,27b) connected to secondary sides of the transformer(25a,25b), and a plurality of circuit breakers(29a,29b) connected to the main circuit breakers(27a,27b) and intercepting each load in case of need.

Description

Water transformer with gas insulated power fuse {POWER RECEIVING AND TRANSFORMING DEVICE WITH POWER-FUSE INSULATED BY GAS}

1 is an external view of a water substation apparatus according to the prior art.

2 is a cutaway view of a water substation apparatus according to the prior art.

Figure 3a is an internal structure of the power panel in the water substation apparatus according to the prior art

Figure 3b is an internal structure of the substation in the water substation apparatus according to the prior art.

4 is an external view of the water substation apparatus according to the present invention.

5 is a cutaway view of a water substation apparatus according to the present invention;

6 is an internal structure of the substation in the water substation apparatus according to the present invention.

7 is a front view and a side view of a gas insulated power fuse in the water substation apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

1: water substation apparatus according to the present invention

A: Water front

B: substation board

11: inlet

13: automatic section switchgear

15: lightning arrester

17: power fuse

19: transformer current transformer for power supply

20 gas insulated case

21: integrated power meter

23: gas insulated power fuse

23a, 23b: power fuse member

23c: gas insulated case

23e: Pressure relief valve

25a, 25b: transformer

27a, 27b: Short-term parking

29a, 29b: circuit breaker

100: water substation apparatus according to the prior art

The present invention relates to a water substation for supplying a building unit or a plant unit by stepping down to a commercial voltage by receiving high voltage. Particularly, one gas insulated power fuse member used in each of two or more banks is provided. The present invention relates to a water substation device having a gas-insulated power fuse that not only exposes a high voltage charging part to be stored in a case, thereby eliminating the risk of electric shock, but also enables a more compact configuration.

In a private electric facility such as a building or a factory, the amount of power demanded is high, so it is impossible to receive electricity that can be used as it is from a utility company, such as a general electric facility of 110V or 220V low voltage.

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. 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 an external view of the water substation 100 according to the prior art, and FIG. 2 shows a disconnection diagram of the water substation 100 according to the prior art, and FIGS. 3A and 3B show the prior art. An internal structure diagram of the water transformer 100 is shown.

The high voltage power is received from the substation through the distribution system consisting of overhead distribution lines and underground distribution lines to the water substation apparatus 100 of each consumer, and the high voltage power supplied to the substation has a standard connection configuration as shown in FIG. 1. It is stepped down to the commercial 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 special high voltage water transformer using a panel as shown in FIG. 1, and a power panel (A ′) for receiving a high pressure and a special high pressure supplied from a substation, and a substation. The first and second substations (B ', C') for supplying to the electrical equipment, lighting, etc. of each part by stepping down the high voltage received from the commercial voltage.

As shown in FIG. 2, the switchboard A 'is provided with an inlet 101 receiving power from a distribution line and an automatic section switch installed on a load disconnection line sending power supplied through the inlet 101. (103), an arrester (105) mounted to protect the load disconnection in the event of an abnormal voltage in the load disconnection, a power fuse (107) for protecting downstream equipment during overcurrent energization, and a transformer for power supply An integrated power meter 111 is connected to the current transformer 109 to measure the amount of power.

In addition, the transformer transformer current transformer 109 is connected to transformers 113a and 113b respectively installed in the first and second substations B 'and C' and stepping down the received high voltages to commercial voltages required by the user. In the first and second substations B 'and C', power fuses 115a and 115b are installed on the primary sides of the transformers 113a and 113b to protect the transformers 113a and 113b, and transformers. Parking breakers 117a and 117b installed on the secondary side of 113a and 113b and connected to the parking breakers 117a and 117b to cut off commercial voltages when necessary, and a plurality of circuit breakers to cut off respective loads when necessary. 119a, 119b).

The 22.9 kV power supplied from the substation enters the termination member 121 through the inlet 101, the inlet 101 is fixed to the insulator fixed to the enclosure, and the conductor 121 fixed to the insulator is an automatic section switch. It is connected to the primary side of 103.

The automatic section switch 103 may be used as a disconnector or a switch according to the use conditions, and is intended to open and close a rated load during operation, and the secondary side is connected to the power fuse 107 through the conductor 125. 107 prevents the spread of accidents to the shear in case of accidents between loads, and can be easily replaced when melted due to the accident current.

In addition, since the arrester 105 is installed through the conductor 127 connected in parallel to the conductor 125, when an abnormal voltage is generated, the arrester 105 is connected to the ground. The secondary side of the power fuse 107 is connected to the transformer transformer transformer 109 for power supply at the bottom through the conductor 129, the transformer transformer transformer for power supply 109 is a transformer through the conductors (131a, 131b) Power fuses 115a and 115b are installed on the conductors 131a and 131b to protect the transformers 113a and 113b.

Since the secondary side of the transformers 113a and 113b has a low pressure and a large capacity, the conductors 133a and 133b have a narrower insulation distance than other conductors and are used as parking short circuits 117a and 117b using a copper conductor having a large cross-sectional area. The parking circuit breakers 117a and 117b are connected to the air circuit breaker or the magnetic circuit breaker (MCCB) according to the load, and a plurality of circuit breakers 119a and 119b are used to determine the branch circuit required on the secondary side.

In the case of the water substation apparatus 100 according to the related art having the above-described configuration, the conductors 123, 125, 127, 129, 131a, 131b, 133a, and 133b connecting the respective components are the poor conductors. There is a problem that there is a risk of electric shock or accidents caused by animals.

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

Accordingly, an object of the present invention is to house the power fuse member used in each of the two or more banks in one gas insulated case, so that the high voltage charging part is not exposed, thereby eliminating the risk of electric shock, and also enabling a more compact configuration. It is to provide a water substation device having a gas insulated power fuse.

Another object of the present invention is to install a pressure relief valve in the gas insulated case of the gas insulated power fuse is designed to safely discharge the gas is increased by the internal arc to minimize the accident range in the event of an internal accident It is to provide a water substation device having a gas insulated power fuse.

The object of the present invention described above, in the water substation for receiving the high pressure and stepping down to the commercial voltage to supply by building unit or factory unit, the inside is formed of a gas-tight tank, the inside of the water substation board and the transformer Including the first half; In the water substation, an inlet receiving power from a distribution line, an automatic section switch connected to a downstream of the inlet, an arrester connected downstream of the automatic section switch, and a power fuse connected downstream of the automatic section switch And a transformer transformer for the power supply instrument connected to the downstream of the power fuse, and an integrated wattmeter connected to the transformer transformer for the power supply instrument for measuring the amount of power; The substation includes a gas insulated power fuse connected downstream of the transformer transformer transformer for power supply and supplying the power substation and the number of power fuse members corresponding to the substation in a single gas insulated case. ; The transformer substation and the substation have a transformer having a primary side connected to the downstream side of the power fuse member, a parking terminal connected to the secondary side of the transformer, and a plurality of connected to the parking terminal and blocking each load if necessary. It is achieved by providing a water substation device having a gas insulated power fuse, characterized in that each of the circuit breakers of the wiring.

According to a preferred feature of the invention, the tank is provided with a pressure relief valve for releasing the pressure to the outside when the internal pressure exceeds a predetermined pressure.

According to a more preferred feature of the present invention, the automatic switchgear, lightning arrester, power fuse and power transformer for current supply transformer is accommodated in one gas insulated case.

According to a further preferred feature of the invention, it further comprises another sub-switch board connected in parallel to the downstream of the gas insulated power fuse.

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.

4 shows an external view of the water substation apparatus 1 according to the present invention, FIG. 5 shows a disconnection diagram of the water substation apparatus 1 according to the present invention, and FIG. 6 shows the water substation apparatus according to the present invention. In (1), the internal structural diagram of the substation board B is shown, and FIG. 7 shows the front view and the side view of the gas insulated power fuse 23 in the water substation apparatus 1 which concerns on this invention. .

The water transformer device 1 according to the present invention is a power transformer member 23a, 23b used in each of the two banks in the water transformer device for supplying the building unit or the factory unit by receiving high voltage and stepping down to a commercial voltage ) Can be safely stored in one gas insulated case (23c) not only to eliminate the risk of electric shock accidents, but also to enable a more compact configuration, as shown in Figure 4 and 5, supplied from the substation The high voltage received from the substation by the high voltage and the special high voltage is stepped down to the commercial voltage. It consists of a substation board (B) to be supplied to.

In the water substation A, the inlet 11 receives electric power from a distribution line (not shown), the automatic section switch 13 connected downstream of the inlet 11, and the downstream section of the automatic section switch 13. A lightning arrester 15 connected to the power supply 17, a power fuse 17 connected downstream of the automatic section switch 13, a transformer current transformer 19 for power supply, and a power supply downstream connected to the power fuse 17; An integrated power meter 21 connected to the power supply transformer transformer 19 for measuring the amount of power is included.

Here, the inlet 11 is connected to the primary side of the automatic section switch 13 as a part of the 22.9kV 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. The lightning arrester 15 is installed downstream of the above-described automatic section switch 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. The power fuse 17 is connected downstream of the above-described automatic section switch 13, which allows the load current to pass safely but is cut off when a current of a predetermined value or more flows to prevent an accident spread to the front end. do. Downstream of the above-described power fuse 17 is connected to the transformer transformer current transformer for power supply, the transformer transformer current transformer for power supply 19 is an integrated circuit and the electric circuit in the measurement of high voltage and high current, etc. Installed in between serves to facilitate the measurement of high voltage and large current.

The automatic section switch 13, the lightning arrester 15, the power fuse 17, and the transformer transformer 19 for power supply instruments of the water substation A as described above are shown in Figs. For example, it is preferable that an insulating gas such as SF ₆ be accommodated in one gas insulating case 20 which is hermetically filled, which includes an automatic section switch 13 and an arrester 15 through one gas insulating case 20. By modularizing the power fuse 17 and the transformer current transformer 19 for power supply and supply, the safer and more compact configuration can be enabled.

A gas insulated power fuse 23 is connected to the substation board B downstream of the transformer transformer current transformer 21 for power supply and supply. The gas insulated power fuse 23 is shown in FIGS. 6 and 7. As shown, for example, the first power fuse member 23a and the substation B applied to the water substation panel A in one gas insulation case 23c in which an insulating gas such as SF ₆ is hermetically filled. The second power fuse member (23b) applied to the) is configured in a form that is received in parallel. Here, the first and second power fuse members 23a and 23b are installed to protect downstream transformers 25a and 25b during overcurrent energization and are replaced at the outside of the gas insulation case 23c through the bushing 23f. It is installed to be possible.

As shown in FIG. 7, the gas insulated case 23c of the gas insulated power fuse 23 is provided with a gas injection valve 23d for allowing an insulated gas of an appropriate pressure to be sealed after being vacuumed. In order to prevent the gas insulated power fuse 23 from exploding due to pressure expansion in case of an internal accident, it is preferable to install a pressure relief valve 23e, and the pressure relief valve 23e is provided inside the gas insulation case 23c. If the pressure rises above a certain value, the pressure can be released safely. Here, reference numeral 23g denotes the input side of the gas insulated power fuse 23, and three pieces are formed below the gas insulated case 23c, and reference numeral 23h denotes the input side of the gas insulated power fuse 23. Three are respectively formed on the upper side and the center side of the insulating case 23c.

In addition, the water transformer panel A is connected to a transformer 25a having a primary side connected downstream of the first power fuse member 23a of the gas insulated power fuse 23 and to a secondary side of the transformer 25a. A parking short circuit 27a and a plurality of wiring breakers 29a connected to the downstream of the parking short circuit 27a and blocking each load, if necessary, are included.

In addition, the transformer board (B) has a transformer (25b) having a primary side connected downstream of the second power fuse member (23b) of the gas insulated power fuse (23), and a parking connected to the secondary side of the transformer (25b). Included are a short circuit 27b and a plurality of wiring breakers 29b connected downstream of the parking short circuit 27b and blocking each load if necessary.

Here, the downstream sides of the first and second power fuse members 23a and 23b of the gas insulated power fuse 23 are connected to the primary sides of the transformers 25a and 25b, which are connected to the primary side. It outputs to the secondary side to step down the high voltage to commercial voltage. The secondary side of transformer 25a, 25b is low pressure and has a large capacity, so the insulation distance is set narrower than other conductors, It is connected to the parking shorts 27a and 27b. Parking short circuits 27a and 27b are connected to the secondary side of the above-described transformer 25b. The parking shorts 27a and 27b control the overall supply of the commercial voltage stepped down by the transformers 25a and 25b. Depending on the type of circuit breaker or magnetic circuit breaker (MCCB) is used. A plurality of wiring breakers 29a and 29b are connected downstream of the parking terminals 27a and 27b, and the wiring breakers 29a and 29b serve to provide a commercial voltage by setting a branch circuit required.

In addition, the line voltage monitors 26a and 26b may be connected in parallel to the above-described parking terminals 27a and 27b on the track, and the line voltage monitors 26a and 26b may be connected to a voltage sensor to check whether the line is live or not. Provides information on the presence or absence of accidents of the insulated power fuse 23 to the site or remote control station via wired or wireless communication.

Although the foregoing description has been described with reference to the water substation 1 having two banks, it further includes another substation (not shown) connected in parallel downstream of the gas insulated power fuse 23. Obviously, it can be similarly applied to the water transformer 1 having three or more banks.

In this case, not only the gas insulated power fuse 23 is included in the other substation, but a transformer connected to the primary side downstream of the power fuse member, a parking short circuit connected to the secondary side of the transformer, and A plurality of circuit breakers are provided, each of which is connected downstream of the parking short circuit and blocks each load if necessary.

As described above, according to the water substation having the gas insulated power fuse according to the present invention, the high voltage charging unit is not exposed by storing the power fuse members used in each of the two or more banks in one gas insulated case. Not only does it eliminate the risk of electric shock, it also has the advantage of enabling a more compact configuration.

In addition, since the pressure relief valve is installed in the gas insulated case of the gas insulated power fuse in which the inside is sealed with gas, when the internal pressure of the gas insulated case rises above the predetermined pressure by the inner arc, the gas is safely released. In this case, it is to provide a water substation having a gas insulated power fuse to minimize an accident range even when an internal accident occurs.

Claims (4)

In the water substation for receiving high voltage and stepping down to the commercial voltage to supply by building unit or factory unit, It consists of a water transformer board and a transformer board; In the water substation, an inlet receiving power from a distribution line, an automatic section switch connected to a downstream of the inlet, an arrester connected downstream of the automatic section switch, and a power fuse connected downstream of the automatic section switch And a transformer transformer for the power supply instrument connected to the downstream of the power fuse, and an integrated wattmeter connected to the transformer transformer for the power supply instrument for measuring the amount of power; The substation includes a gas insulated power fuse connected downstream of the transformer transformer transformer for power supply and supplying the power substation and the number of power fuse members corresponding to the substation in a single gas insulated case. ; The transformer substation and the substation have a transformer having a primary side connected to the downstream side of the power fuse member, a parking terminal connected to the secondary side of the transformer, and a plurality of connected to the parking terminal and blocking each load if necessary. The water transformer device having a gas insulated power fuse, characterized in that each of the circuit breaker for wiring. The method of claim 1, And a pressure relief valve for discharging the pressure to the outside when the internal pressure exceeds a predetermined pressure in the gas insulated case of the gas insulated power fuse. The method according to claim 1 or 2, A water transformer having a gas insulated power fuse, characterized in that the automatic section breaker, the lightning arrester, the power fuse and the transformer transformer for power supply of the water transformer panel is accommodated in one gas insulated case. The method of claim 3, wherein And a further substation panel connected in parallel to the gas insulated power fuse in parallel with the gas insulated power fuse.

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