CN104377062A - Charging switch used for improving output efficiency of impulse voltage generator - Google Patents

Abstract

The invention provides a charging switch for improving the output efficiency of an impulse voltage generator, which includes a fixed support and rotating conductive rods arranged at equal intervals on the dynamic insulating rod, and the fixed support is installed on each stage of the impulse voltage generator to charge The fixed electrode is set on the pillar flange at the end; the contact electrode is set on the end of the rotating conductive rod far away from the rotating motor and the fixed support; if the contact electrode is connected to the fixed electrode, the charging voltage of each level of the impulse voltage generator is equal, eliminating the traditional impact The charging of the voltage generator is uneven; if the contact electrode is disconnected from the fixed electrode, the impulse voltage generator is disconnected at all levels, which eliminates the energy loss of the traditional impulse voltage generator charging resistor during the discharge process. Compared with the prior art, the charging switch provided by the present invention for improving the output efficiency of the impulse voltage generator can effectively realize the switching of the charging and discharging circuit topology of the impulse voltage generator, and achieve the purpose of outputting the high-efficiency long-wavefront operation impulse voltage.

Description

A Charging Switch Used to Improve the Output Efficiency of Impulse Voltage Generator

technical field

The invention relates to a charging switch, in particular to a charging switch for improving the output efficiency of an impulse voltage generator.

Background technique

The operating impact dielectric strength is the main basis for determining the size of the air gap in EHV/UHV power transmission and transformation projects. Due to the improvement of the voltage level of the transmission line and the increase of the line length, the line operation overvoltage front time is also gradually lengthened. For example, the operation overvoltage front time of the 1000kV UHV AC project is mostly 1000μs-2500μs.

The impulse voltage generator is a key test device for studying the insulation strength of the air gap. The efficiency of the operating impulse voltage generated by the existing equipment decreases sharply as the wave front time increases. In order to overcome the problem that the existing extra-large impulse voltage generator cannot generate the impulse voltage with a wave front time of more than 1500 microseconds and the efficiency is not enough, it is necessary to use a charging switch mechanism to consume energy on the charging resistor during the impulse voltage output process to improve the output. efficiency.

When a traditional impulse voltage generator generates a long-wavefront operating impulse voltage, the energy stored in the capacitor will be consumed by the charging resistor, resulting in low output voltage efficiency. In order to improve the output efficiency, it is necessary to adopt a charging switch structure to disconnect the charging resistor during the waveform formation. Therefore, it is necessary to provide a charging switch with simple structure, reliable opening and closing, and capable of safely and effectively switching the circuit topology of the charging and discharging stages of the impulse voltage generator.

Contents of the invention

In order to meet the needs of the prior art, the present invention provides a charging switch for improving the output efficiency of the impulse voltage generator, the charging switch includes N fixed supports, and is arranged on the power insulating rod at equal intervals from bottom to top N rotating conductive rods, the rotating conductive rods are all arranged on a plane, and N is at least 20; the fixed support is installed on the pillar flange of the charging end of each stage of the impulse voltage generator, fixed electrodes are provided;

The rotating conductive rod at the bottom end of the dynamic insulating rod is connected to the rotating motor; the second to N rotating conductive rods of the dynamic insulating rod are sequentially arranged between the fixed support and the dynamic insulating rod; The end of the rotating conductive rod away from the rotating motor and the end away from the fixed support are provided with contact electrodes;

After the rotating motor rotates, if the rotating conductive rod connected to the rotating motor drives the power insulating rod to move upwards, and is connected to the fixed electrode through the contact electrode, N rotating conductive rods form a series branch to realize the charging path of the impulse voltage generator; If the rotating conductive rod connected with the rotating motor drives the dynamic insulating rod to move downward, the contact electrode is disconnected from the fixed electrode, and the circuit is disconnected when the impulse voltage generator discharges.

Preferably, a guide rod is provided between the fixed support on the upper side of the rotating conductive rod at the uppermost end of the dynamic insulating rod and the dynamic insulating rod, the distance between the guide rod and the rotating conductive rod, and the number of N rotating conductive rods the same distance between

The guide rod and the rotating conductive rod are arranged on a plane;

Preferably, the fixed support is provided with a fixed electrode, which is used to connect with the contact electrode of the rotating conductive rod at the uppermost end of the dynamic insulating rod when the dynamic insulating rod moves upward;

Preferably, a guide rail is provided at the uppermost end of the dynamic insulating rod; when the dynamic insulating rod moves up and down, the guide rod slides in the guide rail;

Preferably, the guide track is an insulated arc track;

Preferably, when the contact electrode is disconnected from the fixed electrode, the rotating motor is adjusted to rotate 90° counterclockwise, and the rotating conductive rod connected to the rotating motor rotates from a horizontal position to a vertical position, thereby driving the dynamic insulating rod to move upward , the contact electrode of each rotating conductive rod is connected to the fixed electrode of the rotating conductive rod on its upper side to form a series branch;

Preferably, when the contact electrode is connected to the fixed electrode, the transmission electrode is adjusted to rotate clockwise by 90°, and the rotating conductive rod connected to the rotating motor rotates from a vertical position to a horizontal position, thereby driving the power insulating rod to move downward , the contact electrode of each rotating conductive rod is disconnected from the fixed electrode of the rotating conductive rod on its upper side, so as to realize the disconnection when the impulse voltage generator discharges.

Compared with the closest prior art, the excellent effect of the present invention is:

1. The charging switch for improving the output efficiency of the impulse voltage generator provided by the present invention is simple to implement, reliable to open and close, and can realize high voltage, long stroke, and multiple switch linkage opening and closing above 20 levels, which can be realized safely and effectively The switching of the circuit topology of the charging and discharging stages of the impulse voltage generator achieves the purpose of outputting high-efficiency long wavefront operation impulse voltage;

2. The charging resistance between the two stages of the traditional impulse voltage generator causes the charging voltage of each level to be inconsistent during charging, resulting in uneven charging; when discharging, part of the energy is consumed from the charging resistor, reducing the discharge efficiency. The charging switch provided by the invention can replace the charging resistor, does not change the charging voltage of each stage of the impulse voltage generator during charging, and can cut off the branch circuit during discharging without consuming energy.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Figure 1: A schematic diagram of disconnection of a charging switch for improving the output efficiency of an impulse voltage generator in an embodiment of the present invention;

Figure 2: A schematic diagram of a charging switch closure for improving the output efficiency of an impulse voltage generator in an embodiment of the present invention;

Among them, 1-rotating motor; 2-fixed electrode; 3-fixed support; 4-rotating conductive rod; 5-contact electrode; 6-power insulating rod; 7-guiding rod; 8-guiding track.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The invention provides a charging switch for improving the output efficiency of the impulse voltage generator. When the impulse voltage generator is charging, the switch is closed, and the charging resistor is connected to realize the smooth charging of circuit units above 20 levels; when the impulse voltage generator discharges At this time, the charging resistor is disconnected to eliminate part of the energy stored in the capacitor from being consumed by the charging resistor and improve the output efficiency.

As shown in Figures 1 and 2, a charging switch for improving the output efficiency of the impulse voltage generator in this embodiment includes N fixed supports 3, and N rotating supports 3 arranged at equal intervals from bottom to top on the power insulating rod. The conductive rods 4, the rotating conductive rods 4 are all arranged on a plane, and N is at least 20; the fixed support 3 is installed on the pillar flange of the charging end of each stage of the impulse voltage generator, and the fixed support 3 is provided with a fixed electrode 2;

The rotating conductive rod 4 at the bottom of the power insulating rod 6 is connected to the rotating motor 1, and the rotating motor 1 is insulated from the rotating conductive rod 4, and is not connected to the circuit of the impulse voltage generator; the second to the N Two rotating conductive rods 4 are sequentially arranged between the fixed support 3 and the power insulating rod 6; one end of the rotating conductive rod 4 away from the rotating motor 1 and one end far away from the fixed support 3 are provided with a contact electrode 5 .

After the rotating electrical machine 1 rotates, as shown in Figure 2, if the rotating conductive rod 4 connected to the rotating electrical machine 1 drives the dynamic insulating rod 6 to move upward, and is connected to the fixed electrode 2 through the contact electrode 5, N rotating conductive rods 4 form a series branch , so as to realize the path for charging when the impulse voltage generator is charged; as shown in Figure 1, if the rotating conductive rod 4 connected to the rotating electrical machine 1 drives the power insulating rod 6 to move downward, the contact electrode 5 is disconnected from the fixed electrode 2, so as to When the discharge of the impulse voltage generator is realized, the circuit is disconnected for discharge.

1. Guide rod

A guide rod 7 is arranged between the fixed support 3 on the upper side of the rotating conductive rod 4 at the uppermost end of the dynamic insulating rod 6 and the dynamic insulating rod 6, the distance between the guiding rod 7 and the rotating conductive rod 4, and the distance between the N rotating conductive rods 4 The spacing between them is the same; the guide rod 7 and the rotating conductive rod 4 are arranged on a plane.

The fixed support 3 is provided with a fixed electrode 2 for connecting with the contact electrode 5 of the rotating conductive rod 4 at the uppermost end of the dynamic insulating rod 6 when the dynamic insulating rod 6 moves upward.

The uppermost end of the power insulation rod 6 is provided with a guide rail 8; when the power insulation rod 6 moves up or down, the guide rod 7 slides in the guide rail 8, and the guide rail is an insulating arc track.

2. Working process of charging switch:

(1) The impulse voltage generator is charged, and the charging switch is turned from open to closed;

When the rotating motor rotates counterclockwise to drive the rotating conductive rod to rotate to 90°, the contact electrode at the end of the rotating conductive rod touches the fixed electrode, as shown in Figure 2, the switch is connected. At the same time, the rotating conductive rod drives the power insulating rod to move upwards, and the power insulating rod transmits the action of the first-stage rotating conductive rod to the upper rotating conductive rods to realize multi-stage linkage of switches.

Specifically: when the contact electrode 5 is disconnected from the fixed electrode 2 at this time, adjust the rotating motor 1 to rotate counterclockwise 90°, and the rotating conductive rod 4 connected to the rotating motor 1 rotates from a horizontal position to a vertical position, thereby driving the power insulating rod 6 moves upward, and the contact electrode 5 of each rotating conductive rod 4 is connected with the fixed electrode 2 of the rotating conductive rod 4 on the upper side to form a series branch, as shown in FIG. 2 .

(2) The impulse voltage generator discharges, and the charging switch changes from closed to open;

When the rotating motor rotates clockwise to drive the rotating conductive rod to rotate to 0°, the contact electrode at the end of the rotating conductive rod is separated from the fixed electrode and moves to a horizontal position. Driven by the rotating conductive rod, the dynamic insulating rod moves downward, and at the same time drives the rotating conductive rod of the upper level to rotate, the contact electrodes of each level are separated from the fixed electrodes, and the multi-stage linkage of the switch is separated.

Specifically: when the contact electrode 5 is connected to the fixed electrode 2 at this time, adjust the transmission electrode 1 to rotate clockwise by 90°, and the rotating conductive rod 4 connected to the rotating motor 1 rotates from a vertical position to a horizontal position, thereby driving the power insulating rod 6 Moving downward, the contact electrode 5 of each rotating conductive rod 4 is disconnected from the fixed electrode 2 of the rotating conductive rod 4 on its upper side, so as to realize the discharge of the impulse voltage generator.

Finally, it should be noted that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Claims (7)

1. one kind for improving the charge switch of impulse voltage generator delivery efficiency, it is characterized in that, described charge switch comprises N number of hold-down support, and the N number of rotary conductive bar be set in qually spaced in from the bottom to top on kinetic insulation bar, described rotary conductive bar is all arranged in one plane, and N is at least 20; Described hold-down support is arranged on the pillar flange of described impulse voltage generator every grade charging end, and hold-down support is provided with fixed electrode;

Described kinetic insulation bar rotary conductive bar is bottom connected with electric rotating machine; Described kinetic insulation bar from the bottom to top the 2nd be successively set between described hold-down support and kinetic insulation bar to N number of rotary conductive bar; Away from one end of electric rotating machine in described rotary conductive bar, and be provided with contact electrode away from one end of hold-down support;

Described electric rotating machine if the rotary conductive bar be connected with electric rotating machine drives kinetic insulation bar to move up, is connected with fixed electrode by contact electrode after rotating, and N number of rotary conductive bar forms series arm, realizes path when impulse voltage generator charges; If the rotary conductive bar be connected with electric rotating machine drives kinetic insulation bar to move down, contact electrode and fixed electrode disconnect, and realize open circuit when impulse voltage generator discharges.

2. charge switch as claimed in claim 1, it is characterized in that, a guide post is provided with between hold-down support on the upside of described kinetic insulation bar rotary conductive bar topmost and kinetic insulation bar, the spacing of described guide post and described rotary conductive bar, and spacing between N number of rotary conductive bar is identical;

Described guide post and rotary conductive bar are arranged in one plane.

3. charge switch as claimed in claim 2, is characterized in that, described hold-down support is provided with fixed electrode, for being connected with the contact electrode of kinetic insulation bar rotary conductive bar topmost when kinetic insulation bar moves up.

4. charge switch as claimed in claim 2, it is characterized in that, the top of described kinetic insulation bar is provided with a guide rail; When kinetic insulation bar moves up and moves down, guide post slides in described guide rail.

5. charge switch as claimed in claim 4, is characterized in that, described guide rail is the arc track of insulation.

6. charge switch as claimed in claim 1, it is characterized in that, when described contact electrode and fixed electrode disconnect, adjust described electric rotating machine and be rotated counterclockwise 90 °, the rotary conductive bar be connected with electric rotating machine rotates to be vertical position by horizontal level, thus driving kinetic insulation bar to move up, the fixed electrode of the contact electrode of each rotary conductive bar and the rotary conductive bar on the upside of it is connected to form series arm.

7. charge switch as claimed in claim 1, it is characterized in that, when described contact electrode is connected with fixed electrode, adjust described transmission electrode and turn clockwise 90 °, the rotary conductive bar be connected with electric rotating machine rotates to be horizontal level by vertical position, thus driving kinetic insulation bar to move down, the fixed electrode of the contact electrode of each rotary conductive bar and the rotary conductive bar on the upside of it disconnects, and realizes open circuit when impulse voltage generator discharges.