WO2017144131A1

WO2017144131A1 - High-voltage outdoor circuit breaker

Info

Publication number: WO2017144131A1
Application number: PCT/EP2016/078424
Authority: WO
Inventors: Lutz-Rüdiger JÄNICKE
Original assignee: Siemens Aktiengesellschaft
Priority date: 2016-02-23
Filing date: 2016-11-22
Publication date: 2017-08-31
Also published as: CN108780717A; CN108780717B; DE102016202764A1

Abstract

Disclosed is a high-voltage outdoor circuit breaker comprising a first breaker gap, a first operating lever, a first gear mechanism, and a first actuation unit that actuates the first operating lever, which opens and closes the first breaker gap via the first gear mechanism. The high-voltage outdoor circuit breaker additionally comprises a second breaker gap with a resistor, a second operating lever, a second gear mechanism, and a second actuation unit that actuates the second operating lever, which opens and closes the second breaker gap via the second gear mechanism.

Description

description

Outdoor high-voltage circuit breakers

The invention relates to an outdoor high-voltage circuit breaker.

Such an outdoor high-voltage circuit breaker is known for example from German Utility Model DE 1 995 069.

For example, an outdoor high voltage circuit breaker may serve to switchably connect an overhead line to a power supply. Overhead lines can, for example, have lengths of several hundred kilometers. When connecting a voltage by means of an outdoor high-voltage circuit breaker on an overhead line, a voltage wave propagates on this, which is reflected at the end of the overhead line. Thus, it takes a certain influence time, which is typically between 10 msec (milliseconds) and 15 msec, until a stable state is established on the overhead line.

Typically, the total resistance of an overhead line is in the range of 200 Ω (ohms) to 600 Ω. The resistance of an overhead line is typically a characteristic impedance that has an impedance as a complex resistor.

The invention is therefore based on the object of specifying an outdoor high-voltage circuit breaker in which the reflection of the voltage wave at the open end of a load such as an overhead line does not lead to a voltage overshoot.

This object is achieved by an outdoor high-voltage circuit breaker according to claim 1. Advantageous embodiments of the open-air High-voltage circuit breaker are specified in the subclaims.

The outdoor high-voltage circuit breaker according to claim 1 is designed so that it comprises a first switching path, a first shift rod, a first transmission and a first drive, wherein the first drive drives the first shift rod and this opens the first shift path via the first transmission or closes. The outdoor high-voltage circuit breaker according to the invention additionally comprises a second switching path with a resistor, a second shift rod, a second transmission and a second drive, wherein the second drive drives the second shift rod and this opens or closes the second shift path via the second transmission.

The advantage here is that the inventive high-voltage circuit breaker with the resistance of the second switching path, for example, a connected Freilei- device concludes so that the reflection of the voltage wave does not lead to a voltage overshoot. Due to the separate switching of the resistance of the second switching path and the first switching path, the contact time of the resistance of the Schaltaufgäbe can be adjusted for each switching operation. For example, in the case of a transformer circuit breaker, this can be the switching on of a transformer or the switching on of a connected overhead line. Furthermore, by dividing the switching movements on two systems, the moving masses are reduced. This makes it possible to use lighter shift rails and smaller drives.

In one embodiment, the first switching path is arranged electrically parallel to the second switching path with the resistor. By opening or closing the first switching path or the second switching path, these two parallel branches can thus be separated from the free-running element according to the invention. air-high voltage circuit breakers are opened or closed.

In a further embodiment, the second drive opens or closes in time before the first drive. This ensures that the resistance of the second switching path, for example, serves as a so-called on-resistance, which provides, for example, for the impedance adjustment of a connected overhead line.

In a further embodiment, the second drive closes in time 10 msec to 15 msec before the first drive. With a resistance of 200 Ω to 600 Ω of a typical overhead line, this means that within the influence time of 10 msec to 15 msec the line is charged to 100%. After loading the overhead line, the first switching path can be closed, so that the current path runs over the first switching path. When the first switching path is closed, a resistance of approximately 10 μΩ is present here.

In an alternative embodiment, the second drive closes in time 100 msec up to several hundred msec before the first drive. The advantage here is that, for example, thereby the resistance of the second switching path serves as a current limiter.

In a further embodiment, the second drive closes before the first drive, so that the resistance of the second switching path is protected against overload. With appropriate formation of the resistance of the first switching path, for example, a few 10 μΩ is ensured when closing the first switching path that the current flows through this first path. The ohmic resistance of the second switching path is then relieved and there is no further dissipation of energy at the resistor. In a further embodiment, the second drive opens or closes in time before the first drive by a mechanical or by an electrical coupling. For example, the control of the first drive and the second drive provide electrical coupling, but also a mechanical coupling of the movements of the first shift rod and the second shift rod is conceivable.

In one embodiment, the second switching path is arranged parallel to the first switching path.

In a further embodiment, the first switching path are arranged at right angles to the first switching rod and the second switching path perpendicular to the second switching rod.

In a further embodiment, the first shift rod extends parallel to the second shift rod.

In an alternative embodiment, the first switching path is arranged electrically in series with the second switching path with the resistor and the resistor is electrically parallel to the second switching path.

In such an alternative embodiment, the second drive closes in time after the first drive. For example, the second drive may close in time from 10 msec to 15 msec after the first drive. Likewise, the second drive can close time 100 msec to several 100 msec after the first drive.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following description of the embodiments, which will be explained in more detail in connection with the figures. Showing:

FIG. 1 Outdoor high-voltage power lifter in a side view;

Figure 2 outdoor high-voltage Leistungssehalter in a further side view; and

Figure 3 Outdoor high-voltage Leistungssehalter in a plan.

In the figures 1 to 3, the outdoor high-voltage circuit breaker 100 according to the invention is shown. In Figure 1, the outdoor high-voltage circuit breaker 100 is shown in a side view, in Figure 2 in another side view and in Figure 3 in a plan view.

The outdoor high voltage circuit breaker 100 includes a first switching path 111; 112. Depending on the voltage to be switched, the first switching path 111; 112 be divided into several switching chambers. For example, in outdoor high-voltage circuit breakers 100 that switch voltages in the region of 420 k, these may be two switching chambers, as shown in FIGS. 2 and 3. The two switching chambers 111 and 112 are connected in series and by opening or closing a flow of current through the outdoor high-voltage circuit breaker 100 is prevented or enabled. Furthermore, the open-air high-voltage circuit breaker comprises a first shift rod 120, a first gear 130 and a first drive 140. The first drive 140 drives the first shift rod 120 and opens or closes the first shift link 111 via the first gear 130; 112. The outdoor high voltage circuit breaker 100 of the present invention further includes a second switching path 211; 212. Again, it is possible that this second switching is formed by two Schaltmämmern 211 and 212. Electrically, the switching chambers 211; 212 connected in series. The second switching path 211; 212 includes a resistor. This can be, for example, a switch-on resistance. The resistor may have, for example, an impedance of 450 Ω or generally in the range between 200 Ω and 600 Ω.

The second switching path 211; 212 is also driven by a second shift rod 220, a second gear 230 and a second drive 240. The second drive 240 drives the second shift rod 220 and this via the gear 230, the second shift path 211; 212 to open or close. The first switching path 111; 112 is electrically parallel to the second switching path 211; 212 arranged with the resistor. For example, the resistance of the second switching path 211; 212 in the closed state amount to 450 Ω and the resistance of the first switching path 111; 112 in the closed state in the range of about a few 10 μΩ.

The second drive 240 can be controlled so that it opens or closes in time before the first drive 140. When closing the outdoor high-voltage circuit breaker 100 thus first the second drive 240 is actuated, the second switching path 211; 212 connects with the resistor. Thus, for example, a connected overhead line can be supplied with voltage. By the resistance of the second switching path 211; In 212, the reflection of the voltage wave is completed accordingly and the overhead line can be charged accordingly to 100%. Typically, this happens after an influence time of 10 msec to 15 msec. After this influence time of 10 msec and 15 msec, the first switching path 111; 112 closed, so that now the current mainly via this first switching path 111; 112 flows. Likewise, it may be desired that, for example, when connecting a transformer by the outdoor high-voltage circuit breaker 100, the resistance of the second switching path 211; 212 should serve as a current limiter. It is advantageous, for example, that the second drive 240 closes in time 100 msec up to several hundred msec before the first drive 140. This period is sufficient to limit the current in the transformer. The current flow through the resistance of the second switching path 211; 212 must be limited in time to protect the resistor from overload. Therefore, the second drive 240 should close in time before the first drive 140 that the resistance of the second switching path 211; 212 is protected against overload and does not overheat. This period of time varies with the functionality to be implemented by the resistor.

The temporal closing or opening of the first drive 140 and the second drive 240 can be done by a mechanical or by an electrical coupling of these two drives. For example, a control of the first drive 140 and the second drive 240 make this electrical coupling. Likewise, mechanical couplings are also conceivable which ensure that the second drive 240 closes in time before the first drive 140.

The outdoor high voltage circuit breaker 100 may be mechanically constructed so that the second switching path 211; 212 parallel to the first switching path 111; 112 is arranged. This is illustrated, for example, in FIGS. 2 and 3. A consumer would at the respective outer ends of the first switching path 111; 112 and the second switching path 211; 212 be electrically connected. For example, in the illustration of FIGS. 2 and 3, this is left and right. The outdoor high-voltage circuit breaker 100 may be constructed according to Figure 2 so that the first switching path 111; 112 perpendicular to the first shift rod 120 runs. The first shift rod 120 may, for example, run within a support column 151, but also a course outside the support pillar 151 is conceivable. The second switching path 211; 212 may also be perpendicular to the second

Shift rod 220 may be arranged. It is also possible that the second shift rod 220 extends within the support column 151 or outside of the support column 151th

According to FIG. 1, the first shift rod 120 can run parallel to the second shift rod 220. The resistor is according to the illustrated embodiment in series with the second switching path 211; 212 arranged.

Alternatively, it is possible that the first switching path 111; 112 electrically in series with the second switching path 211; 212 is arranged with the resistor and the resistor is electrically parallel to the second switching path 211; 212th

In such an alternative embodiment of the outdoor high-voltage circuit breaker 100 according to the invention, the second drive 240 closes after the first drive 140 in terms of time. The second drive 240 can close in time 10 msec to 15 msec after the first drive 140. Likewise, the second drive 240 can close time 100 msec up to several 100 msec after the first drive 140.

On-resistance to outdoor high voltage circuit breakers 100 are normally used only at high operating voltages, which require correspondingly long Stützersäulen. In the design of these pillars with composite insulators, they offer a large freedom in the interior due to the required mechanical strength compared to porcelain insulators. In this free space, a ne further, the on-resistance assigned second

Shift rod 220 is arranged with corresponding guide elements. In addition, a further second drive 240 assigned to the on-resistance is provided on the switch base. The two drives 140; 240 are mechanically or electrically coupled, whereby the on-resistance of the second switching path 211; 212 is protected against overload. The contact time of the on-resistance can be varied up to this overload protection by time control of the two drives 140, 240.

By the separate switching of the second switching path 211; 212 and the first switching path 111; 112, the contact time of the resistance of the second switching path 211; 212 of the Schaltaufgäbe be adapted. In the case of a transformer circuit breaker, for example, this can be the switching on of the transformer or the connected overhead line. To avoid and reduce overvoltages when switching on long uncoupling lines, contact times of 10 msec to 15 msec usually suffice. For effective damping of transformer-inrush currents, however, exposure times of 100 msec to several hundred msec are required. By dividing the switching movement to two systems, the moving masses are reduced. As a result, lighter shift rails 120; 220 and smaller drives 140; 240 can be used.

Claims

claims

An outdoor high voltage circuit breaker (100) comprising a first switching path (111; 112), a first shift rail (120), a first transmission (130) and a first drive (140), the first drive (140) controlling the first shift rail (110). 120) drives and this via the first gear (130), the first switching path (111, 112) opens or closes,

characterized in that the outdoor high voltage circuit breaker (100) further comprises a second switching path (211; 212) having a resistor, a second shift rail (220), a second transmission (230), and a second drive (240), the second one Drive (240) drives the second shift rod (220) and this via the second transmission (230), the second switching path (211; 212) opens or closes

Outdoor high-voltage circuit breaker (100) according to claim 1, wherein the first switching path (111; 112) electrically parallel to the second switching path (211;

is arranged with the resistor.

Outdoor high-voltage circuit breaker (100) according to claim 1 or 2, wherein the second drive (240) opens or closes in time before the first drive (140).

Outdoor high-voltage circuit breaker (100) according to claim 3, wherein the second drive (240) time 10 msec to 15 msec before the first drive (140) closes.

Outdoor high-voltage circuit breaker (100) according to claim 3, wherein the second drive (240) time 100 msec to several 100 msec before the first drive (140) closes. Outdoor high voltage circuit breaker (100) according to one of the preceding claims, wherein the second drive (240) closes in time before the first drive (140) that the resistance of the second switching path (211; 212) is protected from overload.

Outdoor high-voltage circuit breaker (100) according to one of claims 3 to 6, wherein by a mechanical or by an electrical coupling of the second drive (240) opens or closes in time before the first drive (140).

Outdoor high-voltage circuit breaker (100) according to egg nem of the preceding claims, wherein the second switching path (211; 212) is arranged parallel to the first switching path (111; 112).

Outdoor high voltage circuit breaker (100) according to egg nem of the preceding claims, wherein the first switching path (111; 112) at right angles to the first switching rod (120) and the second switching path (211; 212) rechtwink lig to the second switching rod (220) are.

Outdoor high-voltage circuit breaker (100) according to one of the preceding claims, wherein the first shift rod (120) runs parallel to the second shift rod (220) ver.

An outdoor high voltage circuit breaker (100) according to claim 1, wherein the first switching path (111; 112) is electrically connected in series with the second switching path (211; 212) with the resistor and the resistor is electrically parallel to the second switching path (211; 212 12. The outdoor high voltage circuit breaker (100) of claim 11, wherein the second drive (240) is timed after the first drive (140) opens or closes.

13. Outdoor high voltage circuit breaker (100) according to claim 12, wherein the second drive (240) closes in time 10 msec to 15 msec after the first drive (140).

14. An outdoor high voltage circuit breaker (100) according to claim 12, wherein the second drive (240) closes in time from 100 msec to several 100 msec after the first drive (140).