TW200405376A - A high-voltage metal-clad substation including a circuit-breaker with an insertion resistor mounted in a busbar - Google Patents

Abstract

The high-voltage metal-clad substation has a circuit-breaker which is surrounded by a vessel (4) which extends along an axial direction (AX), the circuit-breaker being associated with a hollow electrically-conductive bar or "busbar" (4A, 4B) which is electrically connected to a first arcing contact (11') of the circuit-breaker when the circuit-breaker is closed. An insertion resistor (6B) is disposed inside said hollow busbar (4B) and is electrically connected to the circuit-breaker by an inserter (10), the busbar projecting into the vessel so as to form an angle with the axial direction (AX). The insertion resistor is electrically connected by the inserter (10) to a second arcing contact (12') which is electrically insulated from the hollow busbar at least while it is separated from the first arcing contact (11'). The size of the substation is thus significantly reduced, in particular its longitudinal size relative to a conventional substation in which the insertion resistor is mounted at the end of a circuit-breaker.

Description

200405376 (1) 发明. Description of the invention [Technical field to which the invention belongs]. The present invention relates to a high-voltage metal-clad transformer device, which particularly includes a circuit breaker, a plug-in resistor, and a circuit breaker connected to the transformer A conductive rod or "busbar" for the rest of the device. [Prior Art] Such a metal-clad transformer device is described in, for example, French patent document FR2 7 84 500. In this metal-clad transformer device, a circuit breaker is placed inside a cladding layer, and a resistor (also called a closing resistor (c 1 〇sureresist 〇r)) is fixed to the cover via a flange The inside of a box slot of the layer is installed at one end of the cladding layer. There are also other configurations in which the inserted resistor and its tank are arranged parallel to the cladding of the circuit breaker. In some configurations, as shown, for example, in Japanese Patent Document JP01 3 1 3 82 3, the insertion resistor is disposed coaxially with the axis of the circuit breaker inside the cladding of the transformer device and is contacted by an arc A metal cylinder electrically connected to one pole of the circuit breaker is surrounded at a distance. However, in this document, the substation is insulated by air, rather than a “metal-clad” substation, because it contains an insulated casing that supports the two poles and contains an insulating gas. However, equivalent configurations exist in metal-clad substations, and the electrodes of the circuit breaker in question are thus extended by a bus bar surrounded by the metal-clad layer of the substation at a distance. This type of plug-in resistor configuration increases the size of the circuit breaker and detracts from the small nature of the metal-clad transformer equipment, especially for a structure similar to the transformer equipment shown in Figure 1 ^ 4-(2) 200405376 Structure and in which there is a metal-clad transformer device in which the insertion resistor is to be inserted. For such a transformer device 'using a known conventional technology configuration to install and insert a resistor causes a substantial extension of the metal coating of the transformer device to accommodate the resistor inside the coating layer' or causes an additional parallel to The box slot of the cladding layer receives the resistor outside the cladding layer.

SUMMARY OF THE INVENTION An object of the present invention is to reduce a conventional metal coating having an insertion resistor housed vertically in a metal coating of a power conversion device by providing the metal cover power conversion device which is relatively small in the vertical direction. Significant size of the substation.

To this end, the present invention provides a high-voltage metal-clad transformer device with at least one circuit breaker surrounded by a container extending in the axial direction. The circuit breaker is related to a hollow conductive rod or "bus bar" When the circuit breaker is in the closed position for passing the permanent current, the hollow pole is electrically connected to a moving contact of the circuit breaker. The moving contact includes a first arcing contact at one end, an insertion resistor is provided inside the bus bar and is electrically connected to the circuit breaker through an insert, and the metal-clad transformer device is characterized by The hollow bus bar protrudes into the container to form an angle with the axial direction, and the insertion resistor is electrically connected to a second arcing contact of the circuit breaker through the insert. The second arcing contact is at least at It is electrically insulated from the hollow bus bar below the first arc contact. In a specific embodiment of the metal-clad transformer device of the present invention, the plug (3) 200405376 insert is installed inside a housing fixed to one end portion of the bus bar, and the housing is configured so that when the circuit breaker is in the When it is in the closed position, the bus bar is electrically connected to the mobile contact of the circuit breaker. < The insert advantageously has a sliding contact, which is first connected to the insertion resistor and secondly to a fixed contact extending from the second arcing contact of the circuit breaker, the sliding contact being formed by a cylindrical first The support is configured, and the cylindrical first support is installed to be movable in the axial direction under a fixed second support sliding. The fixed second support member is preferably connected to the insertion resistor via a conductive rod member. In another particular embodiment, at the end of the stroke of the insert, the cylindrical first support of the insert is configured to contact a fixed contact that is electrically connected to the bus bar. The invention is described in more detail below with reference to a drawing showing an embodiment by way of non-limiting example.

[Embodiment] As shown in Fig. 1, a metal-clad transformer device particularly includes a metal-clad layer 1 which surrounds a circuit breaker extending along a longitudinal axis A X. In this example, the 'breaker' is composed of two interruption subassemblies 2A and 2B provided on both sides of the actuator 3. The interruption sub-assemblies 2 A, 2B are spaced apart along the longitudinal axis AX (horizontal in this example), and each sub-assembly is electrically connected to a corresponding hollow bus bar 4 A, 4 B standing upright in this example. Each of the busbars 4 A, 4 B is surrounded by the upright cylindrical portion of the metal coating 1.

As such, in this example, each bus bar is relative to the longitudinal axis AX

-6-(4) 200405376 ^ 90 degrees, but a similar configuration is also conceivable in which at least a bus bar forms an angle other than 90 degrees with respect to the longitudinal axis. The metal cladding layer 1 includes a container 4 and two bushings 5A, 5B — a package E circuit breaker 1, wherein the bushings each surround a corresponding busbar 4A, 4B ° — the bushings are formed roughly around the corresponding busbar Upright extension fittings,

A plurality of bolts are fixed to the corresponding branch connection parts of the container 4. The metal-clad transformer device can be advantageously equipped with two insertion resistors, and each of the insertion resistors is provided inside the respective bus bar 4A, 4B 'and each of the insertion resistors is connected with a respective interruption vice president. 2 A, 2 Β $ to reduce the vibration of the voltage surge injected into the electricity grid during the closing of the circuit breaker of the substation

Frame. Such a modification to obtain the transformer device of the present invention can be implemented without modifying the size of the transformer device, especially when each of the hollow bus bars 4A, 4B has an interior sufficient to accommodate a desired insertion resistor. Space time. As such, in the present invention, each of the insertion resistors is accommodated in a container protruding to the circuit breaker to form a hollow bus bar which forms an angle with the axial direction AX of the circuit breaker. Fig. 2 is a more detailed view of the bus bar 4B defining a substantially hollow tubular shape. An insertion resistor 6B having a cylindrical shape in this example is mounted inside the bus bar 4B substantially coaxially with the bus bar 4B. In the example shown in Fig. 2, the insertion resistor is electrically insulated from the bus bar by a dielectric gas contained in a coating layer of a metal-clad transformer device. However, a cylindrical insertion resistor 6B having a larger diameter and being electrically insulated from the bus bar by a solid insulating layer is also conceivable. -7-(5) 200405376 The insertion resistor is held at the center of the inside of the bus bar 4B by two insulators 7 and 8 installed at the respective ends of the bus bar 4B. In this example, the centering member (insulating member) 8 is composed of an insulating cone and is located at the bottom end of the bus bar 4B. The centering member 8 is fixed to the inner surface of the bus bar around its periphery, and a conductive rod member 9 positioned in alignment with the insertion resistor passes through the center of the centering member. The conductive rod member 9 is electrically connected to the bottom end portion of the insertion resistor 6B.

As shown in FIG. 3, the bottom end of the bus bar and the bottom end of the insertion resistor are electrically connected to an insert], which is also along the moving contact of the interruption subassembly 2 A and 2 B The longitudinal axis AX extends towards the axis of movement. The insert 10 cooperates with the mobile contact of the interruption subassembly 2B. The moving contact is equipped with a conductive rod, which is provided at the end facing the insert with a first arcing contact 1 1 'in the shape of a tulip in this example. The mobile contact assembly also includes a tubular portion that is coaxially fixed to the rod, and it is adapted to be connected to the housing of the insert 10 for the passage of a permanent current, as will be explained below. The moving contact is provided hereinafter as a moving contact 11. More specifically, the insert member 10 is installed inside the housing 12 fixed to the bottom end portion of the bus bar 4B in the illustrated embodiment. In this way, the casing 17 is electrically connected to the bus bar 4B. However, other mechanisms are conceivable for fixing the casing in the container 4, for example, by at least one insulating support between the casing and the container, and the casing may be provided by a connection mechanism that does not necessarily necessarily provide the casing supporting function itself. Electrical connection to the bus bar

-8- (6) (6) 200405376 The conductive rod 9 extending from the insertion resistor penetrates into the casing through an opening formed in the casing] 7 and is used to be fixed and electrically connected to the conductive rod through The sliding contact tubular element 9 is electrically connected to a moving first support member 4. The element 15 is hereinafter referred to as the "fixed second support" of the insert, and its function is to partially support and move the first support 14 and move the first support! 4 makes a sliding contact, and moving the first support member 14 itself ensures the moving contact function of the insert]. A fixed contact 1 2 of the interruption subassembly 2 B (which includes a second arcing contact 2 at the end facing the moving contact 1 1) is electrically insulated under the positioning along the axis AX The component 18 is fixed to the case 17. In this way, the second arcing contact 丨 2 ′ is electrically insulated from the hollow busbar bar after being separated from the first arcing contact 11 1, or even without shorting the inserted resistor, as will be explained below. The insert 10 surrounds the fixed contact 12 coaxially, and at the same time, it is organized to strike an arc at the arcing contact n, and between 1 and 2 'will interrupt the moving contact 1 of the subassembly 2B. It is electrically connected to the conductive rod 9 so that a current passes through the inserted resistor 6 B, which corresponds to the state shown in FIG. 3. The insert 10 is also organized to electrically connect the mobile contact 11 to the bus bar 4B so that a current passes through the bus bar at the end of the insert, which corresponds to the state shown in FIG. 4. As shown in FIGS. 3 and 4, the moving contact 11 of the interruption subassembly 2 B includes a part made of an insulating material] 3, which surrounds the end of the moving contact composed of the arcing contact 1 1 ′. And its support moves the first support member 14 against the insert. The support member 14 is suitable to be used to resist the return spring 14 from being driven by the member 13 and to move in translation along the axis AX while driving, and also to freely slide inside the fixed second support member 15. The fixed second support member 15 is held in position by the conductive rod member 9 and has a substantially cylindrical shape, which surrounds and moves the first support member 4 and slides freely along the axis, thereby ensuring sliding electrical contact. In this way, the insertion resistor is electrically connected to the second terminal of the fixed contact 12 of the circuit breaker via the conductive rod member 9, the fixed support member 15 of the insert member, and the first movable support member 14 of the insert member. ARC contact 1 2 I.

With this configuration, the insert 10 can be fixed to the bottom end of the bus bar firstly by being electrically connected to the bus bar via the housing 17 and secondly by being electrically connected to the insertion resistor. When the circuit breaker is closed, the first arcing contact 11 is moved to the second arcing contact 12 2 ′, thereby causing an arc to be fired between the two contacts. In this way, the arcing current flows through the fixed contact 12 and then moves the first support 14 and the fixed support 15 of the insert through the insert to reach the insert resistor through the conductive rod 9 as shown in FIG. . Once the first arcing contact 丨 丨 has begun to cover the second arcing contact 0 pieces 1 2 'The moving support member 14 of the insert and the insert fixed to the housing 17 to be electrically connected to the bus bar 4 B The fixed contacts 16 are in contact, which corresponds to the state shown in FIG. 4. In this way, the insertion resistor is short-circuited because the second arc contact 12 becomes the first moving support member 14 through the insert, the fixed contact 16 and the housing; 7 is electrically connected to the hollow bus bar. The solid contact member 16 is mounted along the axial direction A X and contains a tubular member 'which is in contact with the cylindrical inner wall of the housing 17. At the end of the circuit breaker closing 'the moving contact II continues its travel to its end engagement -10- (8) 200405376 at the position of the housing 17 (not shown). In this way, the moving contact is electrically connected to the housing to increase the cross-sectional area of the contact significantly to allow the permanent current to pass to the bus bar by shorting the circuit breaker into the resistor when the circuit breaker is in its closed position. Permanent current is generally defined as the nominal current that a substation can pass.

The presence of the mobile support member 14 associated with the fixed contact member 16 in the insert member is not indispensable for the metal-clad transformer device of the present invention, but it is generally better to allow the permanent current to be inserted through The housing 17 of the component short-circuits the insertion resistor before flowing between the moving contact 11 and the bus bar 4 B. The present invention can be applied to other types of circuit breakers, and particularly to a circuit breaker having a single interrupting chamber, that is, a type having a single interrupt sub-assembly such as 2A or 2B and a single insert. [Schematic description]

Fig. 1 is an overall view of a metal-clad substation including a two-breaker interruption subassembly and advantageously convertible into a substation of the present invention. FIG. 2 is a schematic diagram of an end portion of the metal-clad power conversion device of the present invention obtained from a power conversion device similar to the power conversion device shown in FIG. 1, in which an insertion resistor is installed to form a power conversion Inside a hollow bus bar on one pole of the device. FIG. 3 is a schematic diagram of the inserts provided in the transformer apparatus of the present invention during the closing of the circuit breaker. FIG. 4 is a schematic diagram of an insert part of a transformer device of the present invention when the circuit breaker is in a closed state (11-200405376 〇). Component comparison table 1 Metal coating 2 A Interruption subassembly 2 B Interruption subassembly 3 Actuator

4 Container 4A Busbar 4B Busbar 5 A Bushing 5B Bushing 6 B Inserting Resistor 7 Insulation

8 Insulator, centering member 9 Conductor rod I 〇 Insert 11 Moving contact II 'First arcing contact 1 2 Fixed contact 1 2' Second arcing contact 1 3 Part 1 4 Moving first support 1 4 'Return spring -12-(10) (10) 200405376 15 Sliding contact tubular element, fixed second support 1 6 fixed contact 1 7 housing] 8 electrical insulation component AX longitudinal axis, axial

-13-

Claims (1)

(1) 200405376 Scope of patent application ]. A high-voltage metal-clad transformer device with at least one circuit breaker surrounded by a container (4) extending along the axial direction (AX), the circuit breaker and a hollow conductive rod or bus bar (4A) )), And the permanent current can enter the transformer equipment through the hollow conductive rod or the bus bar. When the circuit breaker is in the closed position, the hollow conductive rod is electrically connected to a moving contact of the circuit breaker ( [1] for a permanent current to pass through, the moving contact (1 1) includes a first arcing contact (11 ') at one end, and an insertion resistor (6B) is provided on the bus bar Inside the pole and electrically connected to the circuit breaker through an insert (10), the metal-clad transformer device is characterized in that the hollow bus bar protrudes into the container to become axially (AX) Form an angle, and the insertion resistor is electrically connected to a second arcing contact (12 ') of the circuit breaker through the insert (10), the second arcing contact being at least The first arcing contact (1 1 5) is separated from the hollow busbar below (4B) electrically insulated. 2. The metal-clad transformer device according to item 1 of the scope of patent application, wherein the insert (10) is installed inside a casing (17) fixed to one end of the bus bar (4B). The housing is configured to electrically connect the bus bar to the mobile contact (Π) of the circuit breaker when the circuit breaker is in its closed position. 3. The metal-clad transformer device according to item 1 of the scope of patent application, wherein the insert (10) has a sliding contact (14, 15) which is first connected to the insert resistor (6B) ) And secondly connected to a fixed contact (1 2) extending from the circuit breaker -14-(2) 200405376 the second arcing contact (1 2 ′), the sliding contact consists of a cylindrical first The supporting member (1 4) is constituted, and the cylindrical first supporting member is installed to move along the axial direction (AX) while being slidable in a fixed second supporting member (] 5). 4. The metal-clad transformer device according to item 2 of the scope of patent application, wherein the insert (10) has a sliding contact (] 4, 1 5), which is first connected to the insert resistor (6B ) And secondly connected to a fixed contact (12) extending from the second arcing contact (12 ') of the circuit breaker, the sliding contact is composed of a cylindrical first support (M), The cylindrical first support member is installed to be movable along the axial direction (AX) under a sliding position in a fixed second support member (1 5). 5. The metal-clad transformer device according to item 3 of the scope of patent application, wherein the fixed second support member (1 5) of the insert member (10) is connected to the insert via a conductive rod member (9) Resistor (6B). 6. The metal-clad transformer device according to item 4 of the scope of patent application, wherein the fixed second support member (1 5) of the insert member (10) is connected to the insert via a conductive rod member (9) Resistor (6B). 7. The metal-clad transformer device according to item 3 of the scope of patent application, wherein at the end of the stroke of the insert, the cylindrical first support (1 4) of the insert (10) is configured It comes into contact with a fixed contact piece (16) electrically connected to the bus bar (4B). 8. The metal-clad transformer device according to item 4 of the scope of patent application, wherein at the end of the stroke of the insert, the cylindrical first support (1 4) of the insert (10) is configured It comes into contact with a fixed contact (16) electrically connected to the bus bar -15-(3) 200405376 (4 B). 9. The metal-clad transformer device according to item 5 of the scope of the patent application, wherein at the end of the stroke of the insert, the cylindrical first support (1 4) of the insert (10) is It is arranged to be in contact with a fixed contact (1 6) electrically connected to the bus bar (4 B). ] 0. The metal-clad transformer device according to item 6 of the scope of patent application, wherein at the end of the stroke of the insert, the cylindrical first support (1 4) of the insert 0) is configured as It is in contact with a fixed contact piece (16) electrically connected to the bus bar (4B). 1 1. The metal-clad transformer device according to item 7 of the scope of the patent application, wherein the housing (1 7) of the insert has a tubular shape along the axial direction (AX) of the container (4), and The fixed contact (1 6) is installed along the axial direction and is configured to be in electrical contact with the inner wall of the housing. 1 2. The metal-clad transformer device according to item 8 of the scope of patent application, wherein the housing (1 7) of the insert member has a tubular shape along the axial direction (AX) of the container (4), and The fixed contact (1 6) is installed along the axial direction and is configured to be in electrical contact with the inner wall of the housing. 1 3. The metal-clad transformer device according to item 9 of the scope of the patent application, wherein the housing (1 7) of the insert member has a tubular shape along the axial direction (AX) of the container (4), and The fixed contact (1 6) is installed along the axial direction and is configured to be in electrical contact with the inner wall of the housing. 14. The metal-clad transformer device according to item 10 of the scope of the patent application, wherein the housing (17) of the insert member presents a tubular shape along the axial direction (AX) of the container (4), And the fixed contact (1 6) -16- (4) 200405376 is installed along the axial direction and is configured to make electrical contact with the inner wall of the housing. 1 5. The metal-clad transformer device according to any one of items 1 to 14 of the scope of patent application, wherein the hollow bus bar (4A, 4B) and the axial direction of the container (4) (AX) forms a right angle and is surrounded by a cylindrical sleeve (5 A, 5 B) fixed to a corresponding branch connection portion of the container.