JPH07107630A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To provide a gas insulated switchgear in which overall downsizing is realized along with reduction of installation area. CONSTITUTION:First and second main buses are installed in parallel and each phase of both main buses is connected with an arrester 3 for main bus through an arrester connection bus 7. The main bus arresters 3 connected with adjacent phases of both main buses are arranged on one axis. The main bus is provided with a main bus disconnector 8. The main bus disconnectors 8 for the corresponding phases of both main buses are arranged on one axis and interconnected through a line 6. Each line 6 is provided with a circuit breaker 4. Two out of three lines 6 connected with the main bus disconnectors 8 are arranged on the same axes as two out of three main bus arresters 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear suitable for a power system having a high voltage and a large capacity as the power demand increases.

[0002]

2. Description of the Related Art In a gas-insulated device, all charging parts are housed in a completely installed metal container, and arc-extinguishing medium is never ejected to the outside. Therefore, the gas-insulated switchgear using the gas-insulated device is excellent in terms of environment in combination with the size reduction. And with the recent increase in power demand,
Since the power system requires high voltage and large current transmission, high-performance gas-insulated switchgear has been developed, and the equipment is becoming larger. Also, in terms of stable power supply, highly reliable gas-insulated switchgear is being developed.

By the way, in the gas-insulated switchgear, in order to limit the overvoltage such as lightning surge to protect the equipment, and after suppressing the overvoltage, the current continuously supplied from the power system is quickly shut off. In order to recover to a healthy condition, it is necessary to equip a lightning arrester. In addition to the 550 kV power transmission system up to now, in the 1100 kV power transmission system, which will be the core system in the future, in order to deal with the complicated phenomenon caused by handling high voltage, it is indispensable to complicate the surge arrester and increase the scale. Is becoming.

As an example of the above conventional gas-insulated switchgear, a three-phase batch type double bus system will be described below. That is, as shown in FIG. 2, the first main bus and the second main bus are arranged so that the respective phases are parallel to each other. One end of the arrester connecting bus 7 is connected to each phase of the first main bus and the second main bus in a direction perpendicular to the main bus. The main busbar arresters 3 are connected to the other ends of the arrester connecting busbars 7, respectively. The main bus arrester 3 is the first
Three main buses and two second main buses are arranged close to each other (upper and lower in the figure). The main bus arresters 3 provided in the corresponding phases of both main buses are arranged on the same axis.

On both sides (left and right in the figure) of the arrester connection bus bar 7, main bus bar disconnectors 8 are provided for each phase of the first main bus bar and the second main bus bar. The main busbar disconnecting switches 8 provided in the corresponding phases of both main busbars are arranged on the same axis and are connected to each other by a line circuit 6. The line circuits 6 are provided in a direction perpendicular to the main bus, and a circuit breaker 4 is connected to each line circuit 6. The line circuit from the circuit breaker 4 in the lower right of the figure is a bus line communication line 5.

[0006]

However, the conventional gas-insulated switchgear described above has the following problems. That is, today, it is difficult to secure a vast site not only in the urban area but also in the suburbs, and thus there is an increasing demand for downsizing of the device. However, in the structure in which the lightning arrester connecting bus bar 7 is provided separately from other line circuits, devices and the like as described above, the entire gas insulated switchgear becomes large and does not meet the demand for downsizing.

The present invention has been proposed in order to solve the above problems, and its purpose is to devise the arrangement of a lightning arrester and another device to reduce the size of the entire device and a small installation area. It is to provide a gas-insulated switchgear that realizes the realization.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a main bus consisting of a plurality of phases, and a main bus disconnector provided in each phase of the main bus. And a gas-insulated switchgear having a lightning arrester for the main bus,
Install the main bus arrester at a position adjacent to the main bus, connect one end of the arrester connection bus to each phase of the main bus adjacent to the main bus disconnector, and the other end of the arrester connection bus Is connected to the lightning arrester for the main bus.

According to a second aspect of the present invention, in the gas-insulated switchgear according to the first aspect, the main busbar comprises three phases,
The main busbar disconnecting switch and the circuit breaker are connected by a line circuit, and the main busbar arrester provided in two phases of each of the main busbars is provided on the side facing the circuit breaker, and It is characterized in that it is arranged on the same axis as the circuit breakers provided in two phases of each phase of the busbar.

According to a third aspect of the present invention, in the gas-insulated switchgear according to the second aspect, the main busbar is constituted by a double busbar system including a first main busbar and a second main busbar arranged in parallel with each other. And the main bus arrester provided in the remaining one phase of the first main bus and the main bus arrester provided in the remaining one phase of the second main bus are arranged on the same axis. It is characterized by

According to a fourth aspect of the present invention, in the gas-insulated switchgear according to the third aspect, the circuit breaker and the main bus arrester are alternately arranged with the main bus interposed therebetween.

[0012]

The operation of the present invention having the above construction is as follows. That is, in the invention according to claim 1, since the arrester connecting busbar is provided at a position adjacent to the main busbar disconnector, the interval between the respective devices is narrowed.

According to the second aspect of the invention, since the main bus arrester provided in the two phases of the main bus and the breaker provided in the two phases of the main bus are provided on the same axis,
The width of the device in the main bus direction can be saved.

According to the third aspect of the present invention, since the main bus arresters provided in the respective phases of the first main bus and the second main bus are arranged on the same axis, the double bus system is used. The width of the gas insulating device in the direction of the main bus can be saved.

In the invention of claim 4, since the circuit breaker and the lightning arrester for the main bus are provided alternately, it is possible to reduce the vacant space on both sides of the main bus.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment corresponding to the present invention described in claims 1 to 4 will be described below with reference to the drawings.

(1) Configuration of Embodiment The configuration of this embodiment will be described below. That is, as shown in FIG. 1, the first main bus 1 and the second main bus 2 are arranged so that the respective phases are parallel to each other. One end of the arrester connecting bus 7 is connected to each phase of the first main bus 1 and the second main bus 2 in a direction perpendicular to the main bus. The main busbar arresters 3 are connected to the other ends of the arrester connecting busbars 7, respectively. The main busbar arresters 3 connected to the respective phases of the first main busbars 1 are arranged in close proximity to each other on one side of the first main busbar 1 (upper side in the figure). The main bus arresters 3 connected to each phase of the second main bus 2 are arranged close to each other on each side of the second main bus 2 (downward in the figure). And the first
The main bus arrester 3 connected to the adjacent phases of the main bus 1 and the second main bus 2 is arranged on the same axis.

On both sides (left and right in the figure) of the arrester connection bus bar 7, main bus bar disconnectors 8 are provided for each phase of the first main bus bar and the second main bus bar. The main busbar disconnecting switches 8 provided in the corresponding phases of both main busbars are arranged on the same axis and are connected to each other by a line circuit 6. The line circuits 6 are provided in a direction perpendicular to the main bus, and a circuit breaker 4 is connected to each line circuit 6.

Of the main busbar disconnectors 8 on the left side of the figure, the two main busbar disconnectors 8 on the right side are the two main busbar arresters 3 of the three main busbar arresters 3 on the lower side of the figure. It is arranged on the same axis as 3.

Of the main busbar disconnectors 8 on the right in the figure, the two main busbar disconnectors 8 on the left are the two main busbar arresters 3 on the right of the three main busbar arresters 3 on the upper side of the figure. It is arranged on the same axis as 3.

(2) Operation and effects of the embodiment The operation and effects of the present embodiment having the above-mentioned structure are as follows. That is, the line circuit 6 to which the circuit breaker 4 is connected and the arrester connection bus bar 7 to which the main bus arrester 3 is connected
Since and are adjacent, the width of the device in the direction of the main bus can be saved.

In particular, two of the circuit breakers 4 and two of the main bus arresters 3 are provided on the same axis.
Therefore, it is possible to effectively utilize the vacant space generated by vertically connecting the lines to the main buses in which the respective phases are arranged in parallel.

Further, in the first main bus 1 and the second main bus 2, the lightning arrester connecting bus bars 7 other than the two lightning arrester connecting bus bars 7 are provided on the same axis, so that they are generated by the double bus method. It is possible to effectively utilize the empty space on the main bus.

Further, the circuit breaker 4 and the main bus arrester 3
Are alternately provided on both sides of the main bus bar, the vacant spaces on both sides of the main bus bar can be reduced, and the device can be downsized and the area can be reduced. Therefore, the installation space can be reduced.

(3) Other Embodiments The present invention is not limited to the embodiments described above, and the arrangement of each part can be changed as appropriate. For example, the positions of the left and right circuit breakers 4 and the positions of the left and right main bus arresters 3 may be turned upside down. In addition, the directions of the line 6, the arrester connecting bus 7 and the bus connecting line 5 are:
If they are in the same direction, they need not be perpendicular to the main bus.

[0026]

According to the present invention as described above, it is possible to reduce the size and installation area of the entire device by a simple structure in which the lightning arrester for the main bus, the circuit breaker, and the disconnector for the main bus are provided adjacent to each other. It is possible to provide the realized gas-insulated switchgear.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a gas insulated switchgear according to the present invention.

FIG. 2 is a plan view showing an example of a conventional gas insulated switchgear.

[Explanation of symbols]

 1 ... 1st main bus 2 ... 2nd main bus 3 ... Main bus arrester 4 ... Circuit breaker 5 ... Bus connecting line 6 ... Line line 7 ... Lightning arrester connection bus 8 ... Disconnector for main bus

Claims (4)

[Claims] 1. A gas-insulated switchgear having a main busbar composed of a plurality of phases, and a main busbar disconnector and a main busbar lightning arrester provided in each phase of the main busbar, wherein the gas insulated switchgear is located adjacent to the main busbar. Install the main bus arrester, connect one end of the arrester connection bus bar on each phase of the main bus adjacent to the main bus disconnector, connect the other end of the arrester connection bus bar to the main bus arrester A gas-insulated switchgear characterized in that 2. The main bus arrester provided in two phases of each phase of the main bus, wherein the main bus is composed of three phases, the main bus disconnector and the circuit breaker are connected by a line circuit. 2. The gas-insulated switchgear according to claim 1, wherein the circuit breaker is arranged on the side opposite to the circuit breaker and on the same axis as the circuit breaker provided in two phases of each phase of the main busbar. . 3. The main busbar is configured by a double busbar system composed of a first main busbar and a second main busbar arranged in parallel with each other, and the main busbar is provided in the remaining one phase of the first main busbar. The gas insulated switchgear according to claim 2, wherein the main bus arrester and the main bus arrester provided in the remaining one phase of the second main bus are arranged on the same axis. 4. The gas-insulated switchgear according to claim 3, wherein the circuit breaker and the lightning arrester for the main bus bar are arranged alternately with the main bus bar interposed therebetween.