KR20090080961A - Electrical high voltage switching station - Google Patents

Abstract

The invention relates to an electrical high voltage switching station, comprising at least two disconnecting/grounding switches housed in a metal enclosure, having two independently actuatable, linearly displaceable contact pins per phase. Said disconnecting/grounding switches can be connected in a first position with a stationary circuit breaker contact piece and in a second position with a stationary ground contact piece.

Description

ELECTRICAL HIGH VOLTAGE SWITCHING STATION

The present invention relates to an electrical high voltage switchgear assembly having at least one disconnecting switch and at least one ground switch and possibly further components.

Disconnect and ground switches are usually in the form of so-called combined disconnect and ground switches, which are ABB's manual, "Gasisolierte Schaltanlage ELK-0 fur stationen bis 170kV 4000 Ampere, 63 kilo / Ampere" [Gas-isolated ELK-0 switchgear assembly for stations up to 170 kV, 4000 amperes, 63 kilo / ampere, literature 1 HDX580050, pages 7 and 12. Here, the lines are routed in a metal encapsulation, which has two flanges running parallel to each other and one flange running at right angles between the two flanges running parallel to each other. Each line is equipped with a fixed disconnect switch contact. One ground switch contact is connected to the capsule part itself, a mounting element for the movable contact pin is provided on the third flange, the third flange is perpendicular to the two flanges, the movable contact pin is connected to the flanges, And an angle of about 45 ° to the longitudinal axis of the capsule between the two flanges running in parallel. The contact pin has a tooth device that engages and runs perpendicular to the gearwheel device on the drive insulation rod. Rotation of the drive isolation rod moves the contact pin to the ground position, or to the closed position of the disconnect switch, and to a third position in which both the disconnect switch contact point and the ground switch contact point are open.

ABB Schaltanlagenhandbuch [ABB Actuator Assembly Manual], Final Edition 10, page 492, the drawing at the lower left shows the ring device shown in more detail in FIG. 1. This circuit device has two busbar devices SS1 and SS2 connected to each other by respective connection lines V1 and V2.

Four disconnect ground switches 10, 11, 12, 13, briefly mentioned below as disconnect switches, are located in the busbar device SS1. The disconnect switches 20, 21, 12, 13 are provided to the busbar device SS2. The circuit breaker 14 is located between two disconnect switches 11 and 12. Each connection line V1 and V2 is connected between disconnection switches 10 and 11 and 12 and 13, respectively. The further disconnect switch 17 is connected to the node point 15 with respect to the connection line V1, the circuit breaker 18 is connected with the connection line V1, and the disconnect switch 19 is connected with the circuit breaker 18. ) And between the disconnect switches 20 and 21, which correspond to the disconnect switches 10 and 11. Although only the circuit breaker 18 is provided between the node point 16 of the busbar device SS1 and the corresponding node point of the busbar device SS2 without a disconnect switch, a similar association is made with respect to the connection line V2. It also exists.

2 shows an H-circuit and includes two bus bars SS3 and SS4 connected to each other by a connecting line V3. In this case, the connection line is also connected to each node point 30 or 40 between the two respective disconnect switches 31, 32 or 33 and 34 simultaneously in the form of a ground switch. The two disconnect switches 35 and 36 are located in the connection line V3 and, as can be seen, are also in the form of a ground switch at the same time.

It is an object of the present invention to further simplify a high voltage switch assembly of the type described above.

According to the invention, the object of the invention is achieved by the features of claim 1.

The present invention therefore provides an electrical high voltage switchgear assembly having at least two disconnecting and grounding switches contained in a metal capsule and comprising two contact pins for each phase, the contact pins being operated independently of one another. And may be moved linearly and respectively connected to each fixed disconnecting switch contact portion in the first position and each fixed ground contact portion in the second position.

This means that two disconnect ground switches are provided in a standard capsule housing in which a small cubicle-type insulator on the flange is installed, thus greatly simplifying the switch assembly as shown in FIG. 1 or FIG. 2. Means that.

Further advantageous refinements of the invention are specified in the dependent claims.

In this case, the moving lines of the two moving contact portions or the contact pins can be V-shaped with each other.

Alternatively, the moving lines of the two moving contact portions can also run parallel to each other.

According to one advantageous refinement of the invention, at least one small partition-shaped insulator can be provided between the contact pins, so that one contact point is adversely affected by another contact point as a result of the arc generated during switching. To prevent or at least reduce such adverse effects.

In addition, the two contact portions can be placed on one line to form an in-line disconnector, and the ground contact pin can be provided running perpendicular to this line, whereby an internal node The point can be grounded.

The disconnectors and grounding means described herein are each in the form of a three-phase unit for a three-phase system. Each of the following figures shows only one image to make the drawing clear. Whenever the following represents a contact part or a contact pin, this means in each case one contact part or one contact pin per phase.

Further advantageous improvements and improvements of the present invention as well as the present invention will be described in more detail with reference to the drawings showing a number of exemplary embodiments of the invention.

1 shows a ring switch assembly originally known except for a disconnect switch-ground switch unit.

2 shows an H-circuit device.

3 is a schematic cross-sectional view of a disconnect ground switch combination with two moving contact pins.

4 illustrates a further embodiment of a disconnect ground switch.

5 shows a first switch of an inline disconnect switch;

FIG. 6 shows a second embodiment of an inline disconnect switch; FIG.

Such parts in Figures 1 and 2, which are known per se, have been described in detail above.

As can be seen in FIG. 1, the disconnection switch 10, 11 and the disconnection switch 17, which are also ground switches at the same time as all other except the disconnection switches 17, 19, simultaneously disconnect the busbar SS1. To form a first unit 50 for the same. The disconnect switches 20, 21, 19 are combined to form a first unit 51 for busbar SS2. Thereafter, the disconnection switches 12 and 13 for the busbar SS1 can be combined to form the second unit 52, and the corresponding disconnection switches 12, 13 for the busbar SS2. Can be combined to form the second unit 53.

The two first units 50, 51 are physically identical. The second units 52, 53 are likewise physically identical. Especially in the case of the second unit 53, the two disconnect switches 12, 13 have the same reference numerals as the second unit 52 to emphasize that they are identical.

In the embodiment shown in FIG. 2, the disconnect switches 31 and 32 are combined to form the third unit 52a. The disconnect switches 33 and 34 are combined to form the third unit 52b. In this case, the third units 52a and 52b are physically the same. The disconnect switches 35 and 36 can then be combined to form the fourth unit 54.

The first unit 50, 51, the second unit 52, 53, and the third unit 52a, 52b have an externally routed or externally accessible node point. The fourth unit 54 does not need to have such a node point.

The third units 52a, 52b are designed, for example, as shown in FIG. The metal capsule portion 60 has a tubular shape, and at its opposite end, it has insulators 61 and 62 in the form of small partitions arranged in parallel with each other. The connecting stub 63 is located approximately in the center between the small partition insulators 61, 62, runs perpendicular to the longitudinal axis of the capsule 60, and is interrupted by an additional small partition insulator 64. The small partition insulator 61 is connected to a line run 65 having a mounting portion 66 by contact pins 67 fixed at right angles to the longitudinal axis of the metal capsule portion 60. This contact pin 67 is driven by an insulating rod 68. The line run 69 is connected to an insulator 62 in the form of a small partition with a mounting portion 70 for the second contact pin 71, which is driven in the same way by the insulating rod 72. Similarly, the contact pins 71 extend at an angle to the longitudinal axis of the capsule, the longitudinal axes of the contact pins 67 and 71 form a V-shape with respect to each other, and the tip of the contact pins is in the form of an additional small partition. Toward the insulator 64.

The fixed ground contact 73 and the fixed ground contact 74 are installed on the side of the mounting portion 66 facing the mounting portion 66 or the insulator 64 in the form of a small partition using the metal capsule portion 60, respectively. The ground contact is placed on an extension of the longitudinal axis of each contact pin 67 and 71. The coupling or node portion 75 is located on a small partition insulator 64, with fixed disconnect switch contacts 76 and 77 installed thereon.

The contact pins can be moved linearly by the drive rods 68 and 72 in the direction of the ground contact portions 73 and 74 and in the direction of the disconnect contact portions 76 and 77. This arrangement corresponds to the circuit arrangement of the third units 52a, 52b in FIG.

4 shows a further embodiment of the present invention. In this case, the metal capsule part 100 is provided once again, and the opposing free ends thereof are provided with insulators 101 and 102 in the form of small partitions, and the line runs 103 and 104 are connected to these insulators. . Mounting elements 105 and 106 are installed in line runs 103 and 104, contact pins 107 and 108 are fixed to mounting elements 105 and 106 so that they can move, and contact pins 107 and 108 are mutually compatible. It runs parallel and runs perpendicular to the longitudinal axis of the capsule between the two flanges 101 and 102.

The contact link 110 having two contact portions 111 and 112 is installed or fixed on the insulator 109 in the form of a third small partition, so that the contact pins 107 and 108 are respectively contact portions 111 and 112. ) To form a disconnect point. Ground contacts 113 and 114 are provided on the side of the capsule portion 100 facing the small partition-shaped insulator 109, and the contact pins 107 and 108 likewise contact the ground contacts 113 and 114. Can be.

A small cubicle wall 115, which may be made of metal, is provided between the mounting portions 105 and 106; In this case, the small partition wall ends at the distance D from the mounting 110; If the small partition wall 115 is made of an insulating material, the small partition wall 115 may be placed directly on the mounting unit 110. Small partition walls 115 are used in each case to reduce or prevent the adverse effects of each other contact point when the arc strikes one of the disconnect contact points during the switching operation.

The device shown in FIG. 3 or FIG. 4 has conductors in the node portion 75 (see FIG. 3) or mounting 110 as in the case of the third units 52a and 52b in FIG. 2, for example. It can be used as the third units 52a, 52b when respectively connected to (see FIG. 4).

When the device shown in FIG. 3 or 4 is intended to be designed as a third unit 52a, 52b having a node portion, the line connection is via a small partition insulator 64 (see FIG. 3), or the node portion. 3, respectively, through the small partition insulator 109 (see FIG. 4) on the mounting portion 110 (see FIG. 4) or the mounting portion 110 (see FIG. 4).

The apparatus shown in FIG. 3 may allow the incoming line runs 69 and 65 to be connected to a coupling 75 representing ground or node points independently of one another. If this node point is routed to an externally accessible connection, the apparatus shown in FIG. 3 corresponds to the third unit 52a in FIG. Additional disconnectors may be provided between the node point and an externally accessible connection. Such a device corresponds to the first unit 50 of FIG. 1, and the further disconnector corresponds to the disconnector 17 of FIG. 1. The apparatus shown in FIG. 4 can be extended to form the first unit 50 in a similar manner.

In addition, it is possible to arrange the mounting portion 66, the ground contact 73 and the contact pin 67 so that the mounting portion 66 is continuously electrically connected to the node point or the coupling portion 75, and the contact pin 67 Can be connected to the ground contact 73 or the line run (65). Such a device can ground the incoming line run 69 and the node point, or coupling 75, independently of one another, and connect the incoming line runs 69 and 65 to the node point or coupling 75. Allow them to be connected independently of each other. Such a device corresponds to the second unit 52 of FIG. 1. The apparatus shown in FIG. 4 can be converted to the second unit 52 in a similar manner.

In the case of the device shown in FIG. 3 or 4, it is possible to connect additional grounding means to the node point, or to the coupling part 73 of FIG. 3, or to the mounting part 110 of FIG. 4. In addition to having the function of the third unit 52a, such a device can ground the node point.

Such additional grounding means can of course also be provided in the device extended to form the first unit 50 as described above.

In a similar manner, additional grounding means may be provided to the device which has been converted to form the second unit 52, as described above. In this case, however, additional grounding means may be connected to the incoming line run 65 or to the incoming line run 103.

Such units with additional grounding means described herein allow both the incoming line run and the node points to be grounded independently of each other.

An additional device is shown in FIG. 6. For example, the tubular metal capsule portion 80 has small partition-shaped insulators 81 and 82 at opposite ends, and fixed disconnection switch contacts 83 and 84 are attached or installed to the insulator. Furthermore, a third small partition insulator 85 is provided, which extends perpendicular to the small partition insulators 81 and 82 and runs parallel to the longitudinal axis of the capsule portion 80. In addition, an additional fixed disconnection contact portion 86 is installed on its interior. The mounting device 87 is provided inside the capsule, is made of an electrically conductive material, and is fixed inside the capsule by a holder 88 made of an insulating material. Moving contact pins 89 and 90 are provided inside mounting device 87 and are electrically conductively connected to mounting device 87 by suitable sliding contact portions 91 and 92, respectively. The contact pins 89 and 90 are moved in the direction of the fixed contact portions 83 and 84 by an insulated rod, not shown. The third contact pin 93 is located on the mounting device 87 at right angles to the contact pins 89 and 90, and is mounted by the sliding device 87 by the sliding contact portion 94 in the same manner as the contact portions 89 and 90. And a contact pin 93 is driven by an insulating rod so that the contact pin 93 can be connected to the stationary disconnecting contact portion 86.

The disconnect device shown in FIG. 6 can also be modified by providing an additional flange 95 in addition to the flange 85, which runs parallel to the flange 85 and is connected via the flange 85. The conductor may be routed to the mounting device 87. Such a disconnect device is shown in FIG. 5. If desired, a fourth disconnect contact can also be provided on the flange 95, even if this is not shown here, as a result of which the connection conductor just mentioned is connected to the mounting device via the fourth disconnect contact. 87).

It should be noted that the contact portion or contact pin 93 in the disconnect device shown in FIG. 5 or 6 can also be used as a ground contact pin, such that the fixed contact portion 86 forms a ground contact portion. The disconnection device modified in this way thus comprises two disconnectors capable of connecting two incoming lines to the inner node in the form of a mounting device 87 and a grounding means capable of grounding the inner node. It includes. This disconnection device corresponds almost to the fourth unit 54 shown in FIG. 2. The difference is that the fourth unit 54 of FIG. 2 has two grounding means, both of which can ground the internal node.

The drive and grounding means for the two disconnectors can advantageously be combined with each other, subject to a particular locking condition. This means that the grounding means can be cut off only when all of the disconnectors are open, and the disconnecting means can be cut off only when the grounding means are open. However, the two disconnectors can be operated independently of each other. Such coupling can be achieved by suitable mechanical interlocks, for example gate control. However, electrical interlocking via relays is also possible, for example. Two such disconnectors coupled to the grounding means in this manner can be considered in this context also as combined disconnected ground switches.

The embodiment shown in FIGS. 5 and 6 is also referred to as an inline disconnector since the individual contact portions lie in or on the line. The module dimensions between two small partition flanges running parallel to each other are of course larger than the dimensions of the disconnect ground switch module unit, where only one ground contact and disconnect switch contact are provided. However, since the plurality of disconnected ground switch modules have only one disconnected ground switch contact as a whole, this reduces the total amount of space required for the use of the combination according to the invention.

For example, an embodiment according to the invention in which two disconnect switches and two ground switches, or, if necessary, three disconnect switches are inserted into a capsule or capsule module, is shown for example in FIG. 1 or FIG. 2. Significant simplification of the circuit device is achieved. Instead of an individual disconnected ground switch module, it is possible to simply provide a combination module that is prefabricated in a factory and stored in a store, resulting in significant simplification in the manufacture and production of the switchgear assembly.

As described above, the present invention is used in an electric high voltage switchgear assembly or the like having at least one disconnect switch and at least one ground switch and possibly further components.

Claims (12)

An electrical high voltage switchgear assembly comprising: at least two disconnected ground switches received in a metal encapsulation and comprising two contact pins for each phase, the contact pins being operable independently of one another and being linear Moveable to each fixed disconnection switch contact portion in the first position and to each fixed ground contact portion in the second position. 2. The grounding contact of claim 1, wherein each disconnect ground switch has a respective movable contact portion that can be moved on a longitudinal axis, resembles a bolt, interacts with a fixed disconnect contact portion in a first position, and ground contact in a second position. An electrical high voltage switchgear assembly characterized by interacting with a portion. 3. The electrical high voltage switchgear assembly of claim 2, wherein the moving lines of the two moving contact portions or the contact pins form a V-shape with each other. 3. The electrical high voltage switch assembly of claim 2, wherein the moving lines of the moving contact pins run parallel to each other. The method of claim 4, wherein at least one small cubicle-type insulator is provided between the contact pins to prevent one contact from being adversely affected by another as a result of the arc generated during switching. An electrical high voltage switchgear assembly. The disconnect contact switch according to any one of claims 1 to 5, wherein the two incoming line runs 65 and 69 can be connected to the node points or arranged independently of each other. Characterized in that, the electrical high voltage switch assembly. 7. The electrical high voltage switchgear assembly of claim 6, wherein additional grounding means are provided for grounding the node point. 6. A disconnection ground switch according to any one of the preceding claims, wherein one disconnect ground switch is arranged such that an incoming line run 69 is connected to a node point or grounded, One disconnect ground switch, characterized in that the node point is arranged such that it can be connected or grounded to the incoming line run (65). 9. The electrical high voltage switchgear assembly of claim 8, wherein additional grounding means are provided for grounding the incoming line run (65). 10. An electrical high voltage switchgear assembly according to any of claims 6 to 9, wherein said node point is routed to an externally accessible connection. 10. An electrical high voltage switchgear assembly according to any of claims 6 to 9, wherein an additional disconnector is provided between the node point and the externally accessible connection. The method of claim 2, wherein the two contact pins lie on a line such that an in-line disconnector is formed in this manner, An electrical high voltage switch assembly, wherein the ground contact pin is provided perpendicular to this line, whereby the internal node point can be grounded.

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