JP3935545B2 - Shunt reactor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shunt reactor used for phase adjusting equipment installed in a power system.
[0002]
[Prior art]
The shunt reactor is configured by housing a shunt reactor main body including an iron core and a coil in a reactor tank filled with an insulating medium, and a line drawing means for drawing a line is attached to the reactor tank. When the track is constituted by a cable, the cable drawing unit is constituted by the container connected to the side wall of the reactor tank and the cable head arranged in the container, and the cable is raised from the underground to the cable head. Are connected. The container constituting the normal line drawing means has a container main part for storing the cable head and a horizontal pipe part projecting horizontally from the upper end of the side wall of the container main part, and the horizontal pipe part is a reactor. It is connected to a container connecting portion projecting from the side wall of the tank. A partition member such as an insulating spacer is disposed between the horizontal conduit portion of the container and the container connection portion of the tank, and the partition member blocks the flow of the insulating medium between the container and the tank. The container constituting the track drawing means is called an elephant container because the container main part is in a suspended state like an elephant nose.
[0003]
In this type of shunt reactor, an arrester (arrester) is provided to prevent surges caused by lightning from entering the reactor body. In conventional shunt reactors, this arrester is installed in the elephant container. It was stored in the arrester container connected to the upper part.
[0004]
[Problems to be solved by the invention]
As described above, in the conventional shunt reactor in which the cable is pulled in, the arrester container is connected to the upper part of the elephant container in order to provide the arrester. In such a structure, the arrester container and the elephant container Therefore, there is a problem that the structure of the connecting portions of both containers becomes complicated, the assembly is troublesome and the cost is increased.
[0005]
Further, the conventional shunt reactor has a problem that it is not possible to easily perform a pressure resistance test of the shunt reactor after the arrester is attached and the cable is connected to the cable head.
[0006]
An object of the present invention is to provide a shunt reactor in which an arrester can be provided without providing a dedicated arrester container.
[0007]
Another object of the present invention is to provide a shunt reactor in which a withstand voltage test of a shunt reactor body can be easily performed even after an arrester is attached and a cable is connected to a cable head. It is in.
[0008]
[Means for Solving the Problems]
A shunt reactor targeted by the present invention includes a reactor tank that houses a shunt reactor body, a container main part, and a horizontal pipe part that protrudes in the horizontal direction from the vicinity of the upper end of the side wall of the container main part. And an elephant container connected through a partition member to a container connecting portion projecting on the side wall of the reactor tank, and an axis line disposed below the container main portion of the elephant container. A cable head mounted in a vertically oriented state, provided in a state of being insulated from the reactor tank and the elephant container and penetrating the partition member, and having one end disposed in the reactor tank and the other end And a through conductor disposed in the elephant container. One end of the through conductor is connected to a terminal of the shunt reactor body through a predetermined connection conductor in the reactor tank.
[0009]
In this invention, the arrester container provided with the conventional shunt reactor is abolished, and an arrester is arrange | positioned in an elephant container. The cable head is connected to the other end of the through conductor through the first connecting conductor provided in the elephant container, and the non-ground side terminal of the arrester is connected to the other of the through conductor through the second connecting conductor provided in the elephant container. Connect to the end. Further, an upper hand hole is provided in the upper part of the elephant container so as to be positioned in the vicinity of the other end of the through conductor.
[0010]
As described above, when the arrester is arranged in the elephant container, it is not necessary to connect the arrester container to the elephant container. Therefore, the structure can be simplified, the assembly can be facilitated, and the cost can be reduced.
[0011]
In addition, as described above, if an upper handhole is provided in the vicinity of the other end of the through conductor at the upper part of the elephant container, the elephant container is connected to the reactor container and the whole is assembled, and then the shunt reactor is A withstand voltage test can be performed. That is, when performing this test, after disconnecting the connection between the first connection conductor and the second connection conductor and the other end of the through conductor through the upper hand hole, a bushing pocket is attached to the upper hand hole, and the through conductor is predetermined. A test voltage application bushing connected through the connection conductor is attached to the bushing pocket. A withstand voltage test of the shunt reactor body can be performed by applying a test voltage to the shunt reactor body from the test voltage power source through the test voltage application bushing, the predetermined connecting conductor, and the through conductor.
[0012]
The arrester usually comprises a characteristic element housed in a cylindrical case. When such an arrester is used, the axis is directed vertically to a position that is eccentric to the side opposite to the protruding direction of the horizontal pipe section with respect to the central axis of the cable head, and the non-ground side terminal is directed downward. It is preferable to arrange the arrester in a state and to support the upper end of the case of the arrester on the upper part of the container main part. In this case, an upper hand hole is provided in the upper part of the elephant container to perform a connection operation (including a connection operation and a disconnection operation) between the first connection conductor and the second connection conductor and the other end of the through conductor. It is preferable to provide a lower hand hole at the lower part of the elephant container for performing a connection work between the cable head and the first connection conductor and a connection work between the non-ground side terminal of the arrester and the second connection conductor.
[0013]
As described above, when the arrester is arranged in an eccentric state with respect to the central axis of the cable head, the arrester's non-grounded terminal can be obtained simply by increasing the depth dimension without particularly increasing the height of the container main part. Since the insulation distance between the cable head and the terminal of the cable head can be ensured, the height of the elephant container can be prevented from increasing.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The structural example of the principal part of the shunt reactor concerning this invention was shown in FIG.1 and FIG.2. In these drawings, reference numeral 1 denotes a reactor tank. In the reactor tank 1, a shunt reactor main body (not shown) composed of an iron core and a coil wound around the iron core is housed.
[0015]
A duct-like container connecting portion 1a having a flange at the tip projects from the upper portion of the side wall portion of the reactor tank 1, and an elephant container 2 is connected to the container connecting portion. The elephant container 2 includes a vertically long container main part 201 formed in a rectangular parallelepiped shape, and a duct-like horizontal pipe part protruding in the horizontal direction from the upper end of the side wall part of the container main part 201 in a state of being arranged in the horizontal direction. 202, and a flange provided at the tip of the horizontal pipe section 202 is connected to the elephant container connection section 1a via a partition member 3 made of a metal plate or the like. By the partition member 3, communication between the elephant container and the reactor tank is interrupted. A three-phase bushing 4 is attached to the partition member 3. These bushings are attached in a state where they are arranged in the width direction of the duct-like horizontal pipe section 202 (perpendicular to the plane of FIG. 1) and through the partition member 3, and the bushings 4 of each phase are attached. One end of the penetrating through conductor 5 disposed in the tank 1 is connected to a terminal of each phase of the shunt reactor body through a predetermined connecting conductor.
[0016]
A duct-like projecting portion 203 projecting downward is formed at a portion of the bottom of the container body 201 of the elephant container 2 near the reactor tank 1, and a bottom plate 204 attached so as to seal the lower end of the projecting portion 203. Three-phase cable heads 6 are mounted side by side with their axes oriented in the vertical direction.
[0017]
A base 7 fixed on the installation base is disposed below the elephant container 2, and a bottom plate 204 that closes the protrusion 203 provided at the bottom of the elephant container 2 is coupled to the base 7 via the support member 8. Yes. Thereby, the elephant container 2 is supported with respect to the mount frame 7. The three-phase cable head 6 is connected to a terminal portion 9a of a three-phase cable 9 that is launched from the underground.
[0018]
A duct-like upper hand hole 205 opened upward is formed in a portion near the horizontal pipe section 202 at the top of the elephant container 2. A flange is formed at the upper end of the upper hand hole 205, and an opening of the hand hole 205 is sealed by a cover plate 206 attached to the flange. A duct-like lower hand hole 207 is formed at the lower part of the side wall of the elephant container 2 facing the reactor tank opposite to the reactor tank 201, and this hand hole is sealed by a lid plate 208.
[0019]
Three attachment holes are provided in a portion of the elephant container 2 on the side opposite to the horizontal pipe section 202 on the upper part of the container main part 201, and the three-phase arrester 10 is placed in the elephant container 201 through these attachment holes. Has been inserted. The arrester 10 has a characteristic element stored in a vertically long cylindrical case 10 a, and the upper end of the arrester 10 is fixed to the upper part of the container main part 201. The fitting portion between the arrester 10 and the mounting hole is sealed by appropriate sealing means.
[0020]
Each of the three-phase arresters 10 is in a position corresponding to the three-phase cable head 6, and the center axis of each of the three-phase arresters 10 is eccentric to the side opposite to the protruding direction of the horizontal pipe section 202 with respect to the center axis of the cable head 6. Is arranged in. As described above, when the arrester 10 is arranged in an eccentric state with respect to the central axis of the cable head 6, the depth dimension (measured in the left-right direction in FIG. 1) without particularly increasing the height dimension of the container main portion 201. Since the insulation distance between the non-ground side terminal 10b of the arrester 10 and the terminal 6a of the cable head 6 can be ensured only by increasing the dimension), it is possible to prevent the height of the elephant container 2 from increasing.
[0021]
The upper hand hole 205 provided in the elephant container 2 is provided at a position near the other end of the through conductor 5, and the lower hand hole 207 is a terminal of the non-ground side terminal 10 b and the cable head 6 provided at the lower end of the arrester 10. It is provided at a position close to 6a.
[0022]
The terminal 6a of the cable head 6 of each phase is connected to the other end located in the elephant container of the through conductor 5 of each phase through the first connection conductor 11 provided in the elephant container 2, and the arrester 10 of each phase. The non-ground side terminal 10 b is connected to the other end of the through conductor 5 through a second connection conductor 12 provided in the elephant container 2. The 1st and 2nd connection conductors 11 and 12 consist of the insulation coating electric wire which has flexibility. The operation of connecting one end of these connection conductors 11 and 12 to the through conductor 5 can be performed through the upper hand hole 205, and the other ends of the connection conductors 11 and 12 are connected to the terminals 6a of the cable head 6 and the arrester 10 respectively. Connection work for connecting to the ground-side terminal 10 b can be performed through the lower handhole 207.
[0023]
The reactor tank 1 and the elephant container 2 are filled with an insulating medium such as an insulating gas.
[0024]
As described above, when the arrester 10 is arranged in the elephant container 2, it is not necessary to connect the arrester container to the upper part of the elephant container 2, so that the structure can be simplified and the assembly is facilitated. Can do. Moreover, since it is not necessary to connect an arrester container to the upper part of an elephant container, the space above an elephant container can be saved.
[0025]
Furthermore, when the upper hand hole 205 and the lower hand hole 207 are provided as described above, the connection and disconnection work between the first and second connection conductors 11 and 12 and the through conductor 5 is performed using these hand holes. And the first and second connecting conductors 11 and 12 and the cable head 6 and the arrester 10 can be connected and disconnected, and therefore the elephant container 2 is connected to the reactor tank 1 and the whole is assembled. Even so, the withstand voltage test of the shunt reactor body can be performed by removing the first and second connection conductors 11 and 12 and connecting the through conductor 5 to the test voltage application power source.
[0026]
When conducting a withstand voltage test of the shunt reactor body, the first and second connection conductors 11 and 12 are removed, and then the bushing pocket 15 is attached to the upper hand hole 205 as shown in FIG. The bushing pocket 15 is formed in a box-like shape having an opening at the lower end aligned with the hand hole 205 formed in a duct shape, and a flange provided at the lower end opening of the bushing pocket 15 is a hand. It is connected to the flange at the upper end of the hole 205. A three-phase test voltage application bushing 16 is attached through the upper part of the bushing pocket 15, and the internal terminal 16 a of the test voltage application bushing is connected to the other end of the through conductor 5 through the connection conductor 17. Then, an external terminal (not shown) of the test voltage application bushing 16 is connected to the output terminal of the test voltage application power supply, and the distribution in the reactor tank 1 is passed from the power supply through the bushing 16, the connection conductor 17 and the through conductor 5. A test voltage is applied to the road reactor body to conduct a withstand voltage test on the shunt reactor body.
[0027]
In the above example, the hand hole 207 is provided in the lower part of the elephant container 2, but the connection work and the disconnection work between the first and second connection conductors and the cable head 6 and the arrester 10 through the upper hand hole 205. The lower handhole 207 can be omitted when the operation can be performed.
[0028]
【The invention's effect】
As described above, according to the present invention, since the arrester is disposed in the elephant container, it is not necessary to connect the arrester container to the elephant container. Therefore, the structure can be simplified, the assembly can be facilitated, and the cost can be reduced.
[0029]
According to the present invention, since the hand hole is provided in the upper part of the elephant container so as to be located in the vicinity of the other end of the through conductor, even after the elephant container is connected to the reactor container and the whole is assembled, The withstand voltage test of the shunt reactor body can be performed by disconnecting the connection between the first and second connection conductors and the through conductors through the hand hole.
[0030]
Further, in the present invention, the arrester having a characteristic element housed in a cylindrical case is used, and the axis is perpendicular to the position opposite to the protruding direction of the horizontal pipe section with respect to the central axis of the cable head. When the arrester is arranged with the non-ground side terminal facing downward and the upper end of the arrester case is supported on the upper part of the container main part, the container main part of the elephant container Because the insulation distance between the non-grounded terminal of the arrester and the terminal of the cable head can be secured just by increasing the depth dimension without particularly increasing the height dimension, the height dimension of the elephant container increases. This is advantageous in that the space above the elephant container can be saved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration example of a main part of a shunt reactor according to the present invention.
2 is a longitudinal sectional view of an elephant container used in the shunt reactor of FIG. 1. FIG.
FIG. 3 is a cross-sectional view showing a state in which a withstand voltage test is performed on the shunt reactor of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reactor tank 2 Elephant container 201 Container main part 202 Horizontal pipe part 205 Upper hand hole 207 Lower hand hole 3 Partition member 4 Bushing 5 Penetration conductor 6 Cable head 10 Arrester 11 First connection conductor 12 Second connection conductor

Claims (1)

A reactor tank containing the shunt reactor body, a container main part, and a horizontal pipe part projecting horizontally from the vicinity of the upper end of the side wall part of the container main part, the horizontal pipe part being the side wall of the reactor tank An elephant container connected to a container connecting portion projecting from the container through a partition member, and the elephant container is disposed in the elephant container and attached to a lower part of the container main portion of the elephant container with the axis line directed vertically The cable head is insulated from the reactor tank and the elephant container, and is provided in a state of penetrating the partition member. One end is disposed in the reactor tank, and the other end is disposed in the elephant container. An end of the through conductor is connected to the shunt reactor connected to the shunt reactor body in the reactor tank. Stomach,
The cable head is connected to the other end of the through conductor through a first connection conductor provided in the elephant container,
The arrester is housed in the container main part of the elephant container, and the non-ground side terminal of the arrester is connected to the other end of the through conductor through the second connection conductor,
The arrester is composed of a cylindrical case in which a characteristic element is housed, and the axis is perpendicular to the center axis of the cable head at a position opposite to the protruding direction of the horizontal pipe portion. And the upper end of the case is supported by the upper part of the container main part, with the non-ground side terminal facing downward.
In the upper part of the elephant container, an upper hand hole for performing a connection operation between the first and second connection conductors and the other end of the through conductor is provided,
A lower hand hole for connecting the first and second connection conductors to the non-grounded terminals of the cable head and arrester is provided at the lower portion of the elephant container. Road reactor.

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