KR200452903Y1 - Small Gas Insulated Switchgear - Google Patents

Abstract

The present invention relates to a small gas insulated switchgear, a power receiving unit for receiving power in accordance with the present invention, and a power receiving unit and a test unit for measuring the voltage of the received electric power received in one enclosure; A transmission bay for transmitting electric power to a transformer for substation power supply; And a manual operation disconnector installed in the faucet and inspection bay and manually operated to supply or disconnect power to the inspection unit.

Small gas insulated switchgears, incoming bays, potential transformer bays, manual breakers

Description

Small Gas Insulated Switchgear {COMPACT GAS INSULATED SWITCHGEAR}

The present invention relates to a gas insulated switchgear, and more particularly, to the structure of a small gas insulated switchgear that can be used in a substation having a handling voltage of several hundred kilovolts.

Gas insulated switchgear which can be used in substation with handling voltage of hundreds of kilovolts, protects power system by cutting off the line in abnormal state of power circuit such as ground and short circuit as well as opening and closing of circuit in normal state of transmission line and substation line. As a power device, a power device that opens and closes a circuit in an insulating gas enclosed in order to open and close an ultra high voltage electric power.

In such a gas insulated switchgear, a gas insulated switch according to the prior art includes a power receiving bay for receiving power from a main transformer and a potential transformer for stepping down and measuring the voltage of the power supplied by the power supply bay. And functional compartments containing three bays: a transmitting bay (weakly called a STR bay) that supplies power to a transformer in a substation.

However, the gas insulated switch according to the prior art is composed of three bays, and has a large occupied area, a tank for forming a base or a bay enclosure for supporting the bottom, and a bay for each bay. According to the individual device configuration, there are many trouble spots, and there is a problem that transportation, maintenance, repair, and inspection are inconvenient. In addition, the gas insulated switch according to the prior art is a structure in which the breaker in the inspection bay for disconnecting the track for maintenance of the inspection bay is driven and connected through a link rod to the manipulator of the operation panel spaced apart from the inspection bay. The installation of the extended connection rod was inconvenient and also inconvenient for maintenance.

Therefore, the present invention is to solve the problems of the prior art, the purpose of the present invention is to reduce the occupied space and to prevent a large part of the overlap of parts per bay, efficient and reduce the production cost and transport, It is to provide a small gas insulated switchgear that is easy to operate, maintain and repair.

Another object of the present invention is to provide a small gas insulated switchgear which can be installed and maintained more simply because there is no manipulator connecting rod for driving the disconnector in the inspection bay.

One object and another object of the present invention, in the small gas insulated switchgear,

A power receiving and receiving bay in which a power receiving unit for receiving power and a test unit for stepping down and measuring the voltage of the received power are housed in one enclosure;

A transmission bay for transmitting electric power to a transformer for substation power supply; And

It can be achieved by providing a small gas insulated switchgear according to the present invention, characterized in that it is installed in the faucet and inspection bay, a manual operation disconnector for manually operating to supply or disconnect the power to the inspection unit have.

The present invention can receive the effect of reducing the size and occupied area of the entire gas insulated switchgear because the faucet and the test section are accommodated in the faucet and the test bay in a single enclosure. It is possible to reduce the number of redundant parts and to reduce the number of components, such that the tanks can be configured as a common one, and a single disconnector can be shared for faucets and inspections. Can be obtained.

In addition, the present invention can be operated manually, because the disconnector of the faucet and inspection bay can be operated manually, there is no need to connect the connecting rod, it is easy to install, repair and maintenance, and can obtain the effect of reducing the manufacturing cost of the gas insulated switchgear. .

The purpose of the present invention and the constitution and effect of the present invention to achieve the same will be more clearly understood by the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.

Figure 1 is a front longitudinal cross-sectional view showing the configuration of the faucet and inspection bay (bay) in the small gas insulated switchgear according to the present invention, Figure 2 is a side longitudinal cross-sectional view showing the configuration of the transmission bay in a small gas insulated switchgear according to the present invention Figure 3 is a side view showing the appearance of the integrated inspection and transmission bay control panel and the faucet and inspection bay in the small gas insulated switchgear according to the present invention.

1 and 2, the small gas insulated switch according to the present invention includes a power receiving and inspection bay 10 and a power transmission bay 20.

The power receiving and inspection bay 10 includes a power receiving portion 10b for receiving electric power and a power detecting portion 10a for stepping down and measuring the voltage of the received electric power in one enclosure, that is, the tank 10c. do.

The inspection unit 10a depressurizes the voltage of the power by a supplied transformer, including a transformer and a potential transformer, not shown, and converts the voltage into a voltage signal capable of measuring the supply power again by the instrument transformer. To print.

The power receiving portion 10b includes an incoming cable 10b-1, an internal bus line 10b-2, a manual operation disconnector 10b-3, a lightning arrester connecting conductor 10b-4, and an arrester 10b-. 5) is included. Here, the power receiving cable 10b-1 is a power supply means having an electrical conductor and an external insulation coating for supplying electric power supplied from a main transformer, not shown, and four power receiving cables 10b-1 for three phases of AC and ground. ) Can be installed.

The inner bus bar 10b-2 may include, for example, a bus bar formed of an electrical conductor and an insulating coating body for electrically insulating the bus bar from the outside, and the inner bus bar 10b-2 may receive power. And as a conductor for power transmission between the power receiving cable 10b-1 and the manual operation disconnector 10b-3 in the tank 10c for the inspection bay 10.

One end of the manual operation disconnector 10b-3 is connected to the inspection unit 10a, and is connected to an operation handle (not shown) to be manually rotated so that the terminal unit and the inspection unit 10a on the inner busbar 10b-2 side are manually driven. Can be configured as contact and rotatable lever means as a rotational switching means having two positions of a power disconnection position to electrically disconnect the power supply position and the power supply position to disconnect the power supply.

The lightning arrester connecting conductor 10b-4 and the lightning arrester 10b-5 are electrically connected to the internal busbar 10b-2, and as a means for protecting the small gas insulated switch according to the present invention during a lightning strike, the internal busbar 10b And an arrester 10b-4 connected to -2) and an arrester 10b-5 connected to the arrester connecting conductor 10b-4.

The transmission bay 20 is a means for transmitting power to a transformer for supplying power to a substation. The configuration thereof will be described with reference to FIG. 2 as follows.

The power transmission bay 20 includes a disconnector / ground switch switching mechanism 20a, a connecting rod 20b, an inner bus bar 20c, and a cable 20d, as shown in FIG.

The disconnecting device / grounding switch switching mechanism 20a is a power supply for supplying power to the outside by electrically connecting the output busbar to transmit power from the internal busbar 20c to the transformer in the external substation in the transmission bay 20. Position (position rotated about 45 degrees counterclockwise from the position shown in FIG. 2) and ground position (ground position rotated about 45 degrees clockwise from the position shown in FIG. 2) to ground the inner bus bar 20c. ) And a lever means rotatable and contactable as a rotating switching means having three positions of the cutoff position (the position shown in FIG. 2) for disconnecting the power supply of the inner bus bar 20c. . The connecting rod 20b can be connected to the disconnecting / grounding switch switching mechanism 20a as a means for rotating the disconnecting / grounding switch switching mechanism 20a to the above three positions, and the connecting rod 20b is a link. It is composed of a mechanism (link mechanism) to provide the driving force provided by the disconnector / ground switch actuator 30a in the inspection and power transmission control panel 30 to be described later in any of the three positions on the disconnector / ground switch switching mechanism 20a. Transfer to rotate to one location. The disconnector / ground switch actuator actuator 30a may comprise, for example, an electric motor and a transmission.

The inner bus bar 20c may include, for example, a bus bar formed of an electrical conductor and an insulation coating for electrically insulating the bus bar from the outside, and the inner bus bar 20c may include a power transmission bay 20. It was used as a conductor for power transfer between the cable 20d and the disconnector / grounding switch switching mechanism 20a in the tank 20e.

The cable 20d is a power supply means having an electrical conductor and an external insulation coating for supplying the power supplied from the power receiving and inspection bays 10 to a power supply transformer in an external substation. Cables can be installed.

The small gas insulated switch according to the present invention may further include an inspection and a transmission control panel 30 as can be referred to FIGS. 2 and 3. The test and power transmission control panel 30 is installed to be connected to the power reception and test bay 10, and the test bay operating panel and the power transmission bay operating panel are housed in one enclosure.

 The inspection and power transmission control panel 30 includes an ampere meter 30b for measuring the current of the received power, a volt meter 30c for measuring the voltage of the received power, and an overcurrent by detecting an overcurrent. And an overcurrent relay 30d for generating a control signal which causes the disconnecting / grounding switch switching mechanism 20a to operate in the blocking position upon occurrence. The control signal generated by the overcurrent relay 30d drives and controls the disconnector / ground switch switching mechanism 20a to a power supply position and a ground position in addition to the control signal for operating the disconnector / ground switch switching mechanism 20a to a cutoff position. The control signal may be included. This control signal is transmitted to the disconnector / ground switch actuator actuator 30a in the inspection and power transmission control panel 30 to drive the motor included in the disconnector / ground switch actuator 30a to the corresponding position. Can be used as a control signal.

It describes the operation of the small gas insulated switchgear according to the present invention configured as described above.

First, with reference to Figure 1 will be described the operation of the faucet and inspection bay (bay) (10).

In Fig. 1, power received from a main transformer (transformer means for receiving and stepping down power from a power transmission line) of a substation through a power receiving cable 10b-1 in a power receiving and inspection bay 10. Is transmitted to the manual operation disconnector 10b-3 through the internal bus line 10b-2. The manual operation disconnector 10b-3 is operated by a user, and is electrically separated from the power supply position to the inspection unit 10a, and any one of two positions of the power disconnection position to disconnect the power supply to the inspection unit 10a. The power received at the power supply position is supplied to the test unit 10a through the internal bus line 10b-2 and the manual operation disconnector 10b-3, and the test unit 10a is unused. It converts the transformer measurement voltage using the transformer and instrument transformer shown in the figure and outputs it.

Next, with reference to Figs. 2 and 3, the operation of the power transmission bay 20 and the power inspection and power transmission control panel 30 will be described.

Power transmitted through the power receiving and inspection bays 10 via the cable 20d is transmitted to the disconnector / grounding switch switching mechanism 20a via the internal bus 20c.

The inspection and transmission control panel 30 determines whether the electric current received by the overcurrent relay 30d is in an overcurrent state, and when an overcurrent occurs, the disconnector / grounding switch is connected to the disconnector / grounding switch operating mechanism 30a in the inspection and transmission control panel 30. A control signal is output to operate the switching mechanism 20a to the cutoff position. In response to this control signal, the disconnector / ground switch operating mechanism 30a rotates the internal electric motor to rotate and drive the disconnector / ground switch switching mechanism 20a to the blocking position through the connecting rod 20b. Therefore, the disconnecting / grounding switch switching mechanism 20a is located at the position shown in FIG. 2, and thus the power supply from the transmission bay 20 to the power supply transformer in the external substation is cut off.

When the inspection and power transmission control panel 30 is not in the overcurrent state of the electric power received by the overcurrent relay 30d, the power transmission bay or the ground position may be moved to the power supply position or the ground position according to the user's operation on the inspection and power transmission control panel 30. 20) it is possible to drive the disconnector / ground switch switching mechanism 20a. That is, in the case of the power supply position according to the user's operation on the inspection and power transmission control panel 30, the disconnector / ground switch switching mechanism 20a is connected to the disconnector / ground switch operation mechanism 30a in the inspection and power transmission control panel 30. A control signal is output to operate to the power supply position. In response to this control signal, the disconnector / ground switch operating mechanism 30a rotates the internal electric motor to rotationally drive the disconnector / ground switch switching mechanism 20a to the power supply position via the connecting rod 20b. Therefore, the disconnector / ground switch switching mechanism 20a rotates about 45 degrees counterclockwise from the position shown in FIG. 2, and accordingly, the disconnector / ground switch switching mechanism 20a is connected to the output side terminal portion so that the power transmission bay 20 Power is supplied to the transformer for power supply in the external substation.

In the case of the ground position according to the user's operation of the inspection and power transmission control panel 30, the disconnecting / grounding switch switching mechanism 20a is connected to the grounding position of the disconnecting / grounding switch operating mechanism 30a in the inspection and power transmission control panel 30. Output a control signal to operate. In response to this control signal, the disconnector / ground switch operating mechanism 30a rotates the internal electric motor to rotationally drive the disconnector / ground switch switching mechanism 20a to the ground position via the connecting rod 20b. Thus, the disconnector / ground switch switching mechanism 20a rotates about 45 degrees clockwise from the position shown in FIG. 2, and accordingly the inner bus in the transmission bay 20 as the disconnector / ground switch switching mechanism 20a is grounded. 20c is grounded and the power supply to the power supply transformer in the external substation is interrupted.

The small gas insulated switchgear according to the present invention, which is constructed and operated as described above, is housed in one enclosure, that is, the tank 10c, in the faucet and the inspection bay 10. The size and occupied area of the gas insulated switchgear can be reduced, and the tank 10c constituting the base and enclosure of the faucet and inspection bay 10 can be configured as a common one, and one disconnector, that is, manual The redundant parts can be reduced such that the operation disconnector 10b-3 can be shared by faucet and inspection, and the number of components can be reduced, so that the effect of easy transportation, operation, maintenance and repair can be obtained.

In addition, the present invention is a manual operation disconnector (10b-3) of the faucet and inspection bay 10 can be operated manually, there is no need to connect the connection rod, easy installation, maintenance and maintenance, manufacturing cost of gas insulated switchgear The effect can be reduced.

In addition, the present invention is provided with the inspection and transmission control panel 30, the inspection bay control panel and the transmission bay control panel is accommodated in one enclosure, so that the overall size and footprint of the gas insulated switchgear can be further reduced and reduce redundant parts. And the number of components can be reduced, so that the effect of easy transportation, operation, maintenance and repair can be obtained.

Figure 1 is a front longitudinal cross-sectional view showing the configuration of the faucet and inspection bay (bay) in the small gas insulated switchgear according to the present invention,

Figure 2 is a side longitudinal cross-sectional view showing the configuration of the transmission bay in the small gas insulated switchgear according to the present invention,

Figure 3 is a side view showing the appearance of the integrated inspection and transmission bay operation panel and the faucet and inspection bay in the small gas insulated switchgear according to the present invention.

* Explanation of symbols on the main parts of the drawings

10: Faucet and Gladiator Bay 10a: Gladiator

10b: power receiver 10b-1: power cable (cable)

10b-2: internal bus 10b-3: manual override disconnector

10b-4: lightning arrester connecting conductor 10b-5: lightning arrester

20: power transmission bay 20a: disconnector / grounding switch switching mechanism

20b: connecting rod 20c: inner bus

20d: cable

30: Inspection and power transmission control panel 30a: Disconnector / grounding switch operating mechanism

30b ampere meter

30c: volt meter

30d: overcurrent relay

Claims (4)

In the small gas insulated switchgear, A power receiving and receiving bay in which a power receiving unit for receiving power and a test unit for stepping down and measuring the voltage of the received power are housed in one enclosure; A transmission bay for transmitting electric power to a transformer for substation power supply; And And a manual operation disconnector installed in the faucet and inspection bay and manually operated to supply or disconnect power to the inspection unit. The method of claim 1, A small gas insulated switchgear, which is installed to be connected to the power receiving and inspection bays, further comprising an inspection and transmission operation panel in which an inspection bay operation panel portion and a transmission bay operation panel portion are accommodated in one enclosure. The method of claim 2, The power transmission bay includes a disconnector / grounding switch switching mechanism having a power supply position, a disconnection position, and a ground position, The inspection and power transmission operation panel, Ampere meters for measuring the current of received power; A volt meter measuring the voltage of the received power; And And an overcurrent relay for detecting an overcurrent and generating a control signal to operate the disconnector / grounding switch switching mechanism to a cutoff position when an overcurrent occurs. The method of claim 1, And a lightning arrester mounted on the faucet and the inspection bay and electrically connected to the faucet and the inspection bay.

Images