JP3623333B2 - Substation equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power receiving / transforming equipment apparatus in which a circuit breaker, a disconnector, a lightning arrester, and the like are housed.
[0002]
[Prior art]
The conventional 66 / 77kV class extra high voltage substation equipment is from open type power receiving equipment to housing (building housing) type power receiving equipment, and further from gas insulated power receiving equipment (GIS; Gas Insulated Switch) to cubicle type gas insulation. It has been changed to a switchgear (C-GIS).
[0003]
By the way, open-type power receiving equipment is a power receiving equipment that uses air insulation by connecting electrical devices such as circuit breakers, disconnectors, ground disconnectors, instrument transformers, current transformers, and lightning arresters with copper wires and aluminum pipes. there were. Moreover, since these electric devices are arranged in series, the installation space (location area) becomes large, and the charging part is exposed due to the air insulation system, which causes a problem in safety.
[0004]
In response to this, construction costs and land prices have risen, and charging facilities are required to be downsized and sealed due to problems such as contamination of the charging section, safety, and noise, and gas-insulated power receiving facilities have been developed. In this case, each electric device is covered with a pipe-shaped metal container, and a high-pressure SF ₆ (sulfur hexafluoride) gas is enclosed as an insulation medium to make it smaller and hermetically sealed.
[0005]
The cubicle-type gas-insulated power receiving equipment is a power-receiving equipment that has been developed to meet the demands of harmonizing the environment with higher reliability compared to gas-insulated power receiving equipment. This is a cubicle-type container that uses a low-pressure insulating gas near atmospheric pressure, and each electric device is stored in one unit and the interior is divided into structural units, and has the same appearance as other closed switchboards. . In this way, recently, a large number of power receiving facilities using SF ₆ gas as an insulating medium have been operated.
[0006]
[Problems to be solved by the invention]
This SF ₆ gas is colorless, odorless, tasteless, non-flammable, very stable, and non-toxic under normal operating conditions. Due to its high stability and excellent electrical properties, it is widely used as an insulating material for electrical equipment. However, over-voltage is generated by the accident, to occur if arc discharge SF ₆ gas, SF _{6 gas} decomposition products or decomposition such as _{SOF 2, SO 2, SO 2} F 2, SOF 4, HF, SiF 4 Generate gas. The decomposition product and decomposition gas of SF ₆ gas are harmful.
[0007]
In addition to this, under the influence of the recent global ecology boom (global warming prevention and economic orientation), it is difficult to use SF ₆ gas for the power receiving equipment. In addition, because of the difficulty in securing a site for the power receiving facility, a smaller power receiving facility is required. As described above, SF ₆ gas is known to have high insulation performance. However, development of a power receiving facility reduced by using an insulation medium having higher insulation performance is desired.
[0008]
An object of the present invention is to provide a power receiving / transforming equipment device that is superior in safety and reliability and is more space-saving without causing environmental destruction.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, a power receiving / transforming equipment device includes a movable energizing shaft of a vacuum circuit breaker, and an insulating operation rod for opening / closing operation that is connected to the vacuum circuit breaker in a penetrating state. An insulating container that forms an independent sealed space that does not include a current-carrying portion of the vessel, and one end of the insulating container that is connected to the insulating container and the other end of which is connected to the insulating operating bar. And an expandable / contractible bellows that keeps the pressure in the insulating container at 10 ⁻² Pa or less.
[0010]
That is, an insulating operation rod for opening and closing the vacuum circuit breaker is housed in an insulating container, one of the insulating operation rods is connected to the movable shaft of the vacuum circuit breaker, and the other is connected to the operation mechanism. Telescopic bellows are provided at both ends, and are fixed to the insulating operation rod to enable the operation of the insulating operation rod.
[0011]
In this way, it is housed in a high-vacuum insulating container, and by providing bellows on both ends of the insulation operation rod, it is possible to open and close the circuit breaker contacts, even if an overvoltage occurs due to an accident etc., and arc discharge occurs It is possible to provide a circuit breaker that does not generate decomposition products and decomposition gas, and thus has excellent safety without causing environmental destruction. In addition, since a high vacuum with excellent insulating properties is used as the insulating medium, the circuit breaker main holiday can be reduced.
[0012]
According to a second aspect of the present invention, the power receiving / transforming equipment device includes a movable energizing shaft of the disconnector, and an insulating operation rod for opening / closing operation that is connected at a connecting portion with the disconnector is housed in a penetrating state. An insulating container forming an independent sealed space not including a portion, and one end connected to the insulating container and the other end connected to the insulating operating rod. It is characterized by comprising a telescopic bellows that keeps the pressure in the container at 10 ⁻² Pa or less, and a disconnector block in which the disconnector and the insulating container are molded in an integrated structure.
[0013]
That is, an insulating operation rod for opening / closing operation of the disconnector is housed in an insulating container, one of the insulating operation rods is connected to the movable shaft of the disconnector, and the other is connected to the operation mechanism. Extendable bellows are provided at both ends of the insulating container, and are fixed to the insulating operation rod to enable the operation of the insulating operation rod. Further, an insulating operation container for a disconnecting device was provided in which the pressure in the insulating container was set to a vacuum of 10 ⁻² Pa or less.
[0014]
In this way, the insulating operation rod for opening / closing operation of the disconnector is stored in a high vacuum insulating container of 10 ¹² Pa or less, and bellows are provided at both ends of the insulating operation rod, so that the opening / closing operation of the contact of the circuit breaker can be performed. Even if an overvoltage occurs due to an accident or the like and an arc discharge occurs, no decomposition product or decomposition gas is generated. For this reason, the disconnector excellent in safety can be provided without destroying the environment. Furthermore, since the high vacuum with excellent insulating properties is used as the insulation medium, the disconnector main body can be reduced.
[0015]
According to a third aspect of the present invention, there is provided a power receiving / transforming equipment apparatus including a vacuum circuit breaker block in which a vacuum circuit breaker and an insulating container are molded in a solid structure with a solid insulator. And since the insulation operation container of vacuum circuit breaker and circuit breaker is housed in one block molded with insulation, the insulation operation container of circuit breaker and circuit breaker which is excellent in insulation performance and easy to replace circuit breaker and smaller Can be obtained.
[0016]
According to a fourth aspect of the present invention, there is provided a power receiving / transforming equipment comprising a vacuum valve block in which a vacuum circuit breaker is molded with a solid insulator, and an operation container block in which an insulating container is molded with a solid insulator. And since the insulation operation container of the vacuum circuit breaker and the circuit breaker was molded with insulation breaks and stored in separate blocks, the vacuum circuit breaker and its operation container can be easily replaced and have excellent insulation performance. It is possible to obtain a small circuit breaker and an insulated operation container for the circuit breaker.
[0017]
According to a fifth aspect of the present invention, there is provided a power receiving / transforming equipment device including a disconnector block in which a disconnector and an insulating container are molded into a single structure with a solid insulator. And the pressure in the container of the main contact of the disconnecting device is set to a vacuum of 10 ¹² Pa or less, and the vacuum disconnecting device and the insulating operation container of the disconnecting device are stored in one block molded by an insulation break, thereby causing an accident, etc. As a result, an overvoltage is generated, and even if arc discharge occurs, no decomposition products or decomposition gases are generated. For this reason, the circuit breaker excellent in safety | security without destroying an environment can be provided. In addition, since the high vacuum having excellent insulating characteristics is used as the insulating medium, the disconnector main holiday can be reduced. By molding these disconnectors and the insulating operation container of the disconnector with an insulator, it is easy to replace the breaker, and it is possible to obtain a smaller disconnector with excellent insulation performance.
[0018]
The power receiving / transforming equipment apparatus according to claim 6 comprises a disconnector vacuum valve block in which a disconnector is molded with a solid insulator, and a disconnector operation container block in which an insulating container is molded with a solid insulator. Yes. And, by isolating the vacuum disconnector and the insulating operation container of the disconnector with an insulation break, and storing them in separate blocks, the disconnector and its operation container can be easily replaced, and the insulation performance is excellent. A small circuit breaker and an insulated operation container for the circuit breaker can be obtained.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the power receiving / transforming equipment apparatus of the present invention will be described. In FIG. 1, a fixed electrode 2 and a movable electrode 3 are provided inside a vacuum valve 1 for a vacuum circuit breaker. When the fixed electrode 2 and the movable electrode 3 are in contact with or separated from each other, current is conducted or cut off. The movable energizing shaft 4 passes through a movable side cover plate 6 through a bellows (film body) 5 and is attached to the movable electrode 3.
[0024]
Reference numeral 11 denotes an insulating container for opening and closing the movable electrode 3 and the movable energizing shaft 4 of the vacuum valve 1, and the internal pressure is a vacuum of 10 ⁻² Pa (pascal) or less. An insulating operation rod 12 connected to the movable energizing shaft 4 of the vacuum valve 1 is provided in the insulating container 11, and the insulating operation rod 12 is connected via bellows 13 provided at both ends of the insulating container 11. It penetrates the cover plates 14 and 15 at both ends of the insulating container and is connected to the operation mechanism 19.
[0025]
FIG. 1 also shows an embodiment of claim 3. A vacuum valve 1 for a vacuum circuit breaker, an insulating container 11, a connecting portion between the vacuum valve 1 and the insulating container 11, and the like are provided for each phase. Are housed in a vacuum circuit breaker block (group) 41 molded in an integral structure (for example, resin or epoxy resin casting).
[0026]
Further, the gross shield (shield) 16 which surrounds the end portions of the bellows 13 and the insulating operating rod 12 provided is fixed to the insulation container 11, when the height of the shield 1 6 the bellows 13 is extended It is higher than the height. The shield 16 surrounds the bellows 13 installed between the inner surface side of the insulating container 11 and the insulating operation rod 12, and the electric field inclination of this portion is changed to improve the insulation.
[0027]
FIG. 2 is a sectional view of a power receiving / transforming equipment apparatus showing an embodiment of claim 2. The fixed electrode 2 and the movable electrode 3 are provided inside the vacuum valve 21 for the vacuum disconnector, and the circuit is opened and closed at this portion. Reference numeral 4 denotes a movable energizing shaft, which airtightly penetrates the movable side cover plate 6 via a bellows 5 and is attached to the movable electrode 3. Reference numeral 11 denotes an insulating container for opening and closing the movable electrode 3 and the movable energizing shaft 4 of the vacuum disconnector vacuum valve 21, and the internal pressure is a vacuum of 10 ⁻² Pa or less. An insulating operation rod 12 connected to the movable energizing shaft 4 of the vacuum disconnector vacuum valve 21 is provided in the insulating container 11. The insulating operation rod 12 is connected to the operation mechanism 19 through the cover plates 14 and 15 at both ends of the insulating container 11 via bellows 13 provided at both ends of the insulating container 11.
[0028]
FIG. 2 also shows an embodiment of claim 5. The disconnector vacuum valve 21, the insulating container 11, the connecting portion between the disconnector vacuum valve 21 and the insulating container 11, etc. are provided for each phase. And is accommodated in a disconnector block 44 molded in an integral structure.
[0029]
Further, the gross shield 16 surrounding the end portions of the bellows 13 and the insulating operating rod 12 provided is fixed to the insulation container 11, the height of the shield 1 6 than the height at which the bellows 13 is extended It is high. The shield 16 surrounds the bellows 13 installed between the inner surface side of the insulating container 11 and the insulating operation rod 12, and the electric field inclination of this portion is changed to improve the insulation.
[0030]
FIG. 3 shows an embodiment of claim 4 in which the vacuum valve 1 for the vacuum circuit breaker and the insulating container 11 are molded separately from each other, and the vacuum valve 1 is housed in a vacuum valve block 42 for insulation. The container 11 is stored in the operation container block 43.
[0031]
FIG. 4 shows an embodiment of claim 6, wherein the disconnector vacuum valve 21 and the insulating container 11 are separately molded with an insulator, and the disconnector vacuum valve 21 is housed in the disconnector vacuum valve block 45. The insulating container 11 is accommodated in the operation container block 46 for disconnector.
[0032]
In addition, when the material of the insulating container 11 and the insulating operation rod 12 shown in FIGS . 1 to 4 is ceramic, it has been confirmed that the insulating characteristics are further excellent.
[0033]
5 and 6 , the vacuum circuit breaker block 41 is configured and molded so that the vacuum valve 1 is arranged on the line A connecting the central axes of the vacuum valves 1 for the vacuum circuit breakers of the respective phases. The main circuit connection terminal 51 of the valve 1 is provided in a direction orthogonal to the straight line A. Further, the main circuit connection terminal 51 protrudes from the molded vacuum circuit breaker block 41 so that it can be connected to other devices.
[0034]
As described above, by using a high vacuum of 10 ⁻² Pa or less as an insulation medium holiday of the circuit breaker and disconnector and its switching operation part, and by molding the phase between the circuit breaker and the disconnector with an insulation holiday, Since SF ₆ gas is not used as a power receiving facility, an overvoltage is generated due to an accident or the like, and no decomposition product or decomposition gas is generated even when arc discharge occurs. For this reason, it is possible to provide a power receiving / transforming equipment that is excellent in safety without destroying the environment.
[0035]
Moreover, by storing an insulating operation rod for opening / closing operation of the circuit breaker and disconnector in a high vacuum insulating container of 10 ⁻² Pa or less and providing bellows at both ends of the insulating operation rod, The contact opening and closing operation is possible, and the high vacuum with excellent insulation properties is used as an insulation medium, so the main body of the disconnector and the insulating container can be reduced, and as described above, the insulation between the breaker and disconnector phases can be achieved. By molding with a solid insulation rest and a block structure, it is easy to replace the circuit breaker and disconnector, and the power receiving equipment can be downsized.
In addition, the dielectric breakdown of the insulator surface in high vacuum is caused by secondary electron avalanche on the insulator surface due to electron emission from the triple junction (vacuum one insulator one electrode) where the insulator and the electrode are in contact. It is known that dielectric breakdown progresses. Therefore, by providing a shield surrounding the portion where the insulating operation rod and the bellows are fixed in the insulating container of the circuit breaker and disconnector, the electric field strength of the portion where the insulating operation rod and the bellows which are triple junctions are fixed is provided. Is reduced, and electron emission from the junction is suppressed. For this reason, the insulation performance of the surface of the insulation operating rod is improved.
[0036]
Moreover, the dielectric breakdown performance in high vacuum depends on the adsorbed gas on the electrode and the insulator surface. Therefore, by using ceramic as the material for the insulating operation rods of the circuit breaker and disconnector, it is possible to perform heat treatment of several hundred degrees in a vacuum at the manufacturing stage. For this reason, the adsorption gas in an insulation operation container can be removed, and the insulation performance of an insulation operation container and an insulation operation rod can be improved. Furthermore, since there is no decrease in the degree of vacuum over time in the insulating operation container, it is possible to obtain an insulating operation container in which the insulation performance does not deteriorate.
[0037]
Furthermore, the central axis of each phase of the vacuum circuit breaker or disconnector is arranged on a straight line, and these circuit breakers and disconnectors are stored in a molded block, orthogonal to the arrangement of the circuit breakers and disconnectors of each phase. By providing the main circuit connection terminal of the circuit breaker or disconnector in the direction to be extended and projecting the main circuit connection terminal from the block of the insulator, not only the replacement of the circuit breaker or disconnector becomes easy, but also a smaller power receiving Facilities can be provided.
[0038]
As described above, according to the present invention, the insulation medium of the circuit breaker, the disconnector, and the insulating container is set to a high vacuum of 10 ⁻² Pa or less, and each device is molded with a solid insulator, thereby providing excellent insulation performance. In addition, the power receiving facility can be downsized. Moreover, even if the worst situation such as an accident occurs, it is possible to provide a power receiving / transforming equipment that is excellent in safety without destroying the environment.
[0039]
【The invention's effect】
According to the present invention, operational safety of the power receiving / transforming equipment can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a power distribution and distribution equipment apparatus according to an embodiment of claims 1 and 3 ;
FIG. 2 is a cross-sectional view of a power receiving and distributing equipment apparatus according to one embodiment of claim 2 and claim 5 ;
FIG. 3 is a cross-sectional view of a power receiving / distributing facility device according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of a power receiving / distributing facility apparatus showing one embodiment of claim 6;
5 is a plan view of a receiving power distribution equipment device.
6 is a side view of FIG. 5. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vacuum valve 2 Fixed electrode 3 Movable electrode 4 Movable conduction shaft 5 Bellows 6 Movable side cover plate 11 Insulation container 12 Insulation operation rod 13 Bellows 14 Cover plate 15 Cover plate 16 Shield 19 Operation mechanism 21 Vacuum valve 41 for a disconnect circuit breaker block

Claims (6)

An insulating operation rod for opening / closing operation that is connected at the connecting portion with the vacuum circuit breaker is housed in a movable energizing shaft of the vacuum circuit breaker in a penetrating state, and an independent sealed space that does not include the current-carrying part of the vacuum circuit breaker An insulating container to be formed and one end connected to the insulating container and the other end connected to the insulating operating bar provided at a penetrating portion of the insulating operating rod of the insulating container, and the pressure in the insulating container is set to 10 ⁻² Pa. A substation equipment comprising: a telescopic bellows held below. An insulating operation rod for opening / closing operation that is connected to the movable energizing shaft of the disconnecting device in a connecting portion with the disconnecting device is stored in a penetrating state, and an insulating space that does not include the energizing portion of the disconnecting device is formed. A container, one end connected to the insulating container and the other end connected to the insulating operation rod, and a telescopic bellows for maintaining the pressure in the insulating container at 10 ⁻² Pa or less, the disconnector and the insulation A disconnecting / transforming equipment apparatus comprising: a disconnector block in which a container is molded in an integrated structure. The power receiving / transforming equipment apparatus according to claim 1, further comprising a vacuum circuit breaker block in which the vacuum circuit breaker and the insulating container are molded in a solid structure with a solid insulator. The power receiving / transforming equipment apparatus according to claim 1, further comprising: a vacuum valve block in which the vacuum circuit breaker is molded with a solid insulator; and an operation container block in which the insulating container is molded with a solid insulator. The power receiving / transforming equipment apparatus according to claim 2, further comprising a disconnector block in which the disconnector and the insulating container are molded in a solid structure with a solid insulator. The power receiving / transforming equipment according to claim 2, comprising: a vacuum valve block for a disconnector in which the disconnector is molded with a solid insulator; and an operation container block for the disconnector in which the insulating container is molded with a solid insulator. apparatus.

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