High-voltage capacitor fling-cut switch

Abstract

A high-voltage capacitor fling-cut switch relates to the field of fling-cut switches, mainly solves the problem of how to simplify the structure of the fling-cut switch and ensure the stable operation of a power grid, and comprises a base and a plurality of vacuum contactors, a plurality of operating mechanisms corresponding to the vacuum contactors one by one are arranged in the base, and the vacuum contactors are arranged on the base. The top end of the vacuum contactor is an input end, a plurality of voltage transformers corresponding to the operating mechanisms are arranged on the base, the input end is connected with one end of each voltage transformer through a conductive part, the other ends of every two adjacent voltage transformers are connected through a conductive part, and the voltage transformers are used for providing power for the operating mechanisms. And the operating mechanism can control the on-off of the vacuum contactor. The input end of the vacuum contactor is externally connected with the voltage transformer, and the voltage transformer supplies power to the operating mechanism, so that the control structure of the fling-cut switch is simplified, and stable operation of a power grid is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switching switch, relates to a high voltage capacitor switching switch. BACKGROUND

[0002] The high voltage capacitor switching switch is the core component of the reactive power compensation device in the power system, and its performance directly influences the power quality and the operation stability of the power grid, and the switching switch is mainly used for controlling the input and removal of the shunt capacitor to balance the system reactive power and improve the power factor. The vacuum contactor has become the preferred executing element of the high voltage capacitor switching switch due to the advantages of strong arc extinguishing capacity, long service life and frequent operation, and in the prior art, the operating mechanism for driving the vacuum contactor to act needs independent working power supply, and the traditional solution usually adopts a common control power module for the whole switch cabinet, centrally supplies power to each operating mechanism through complex internal wiring, or separately configures a small control transformer as a dedicated power supply for each vacuum contact unit, but due to the use of the common power module, the power supply circuit and a large number of internal connecting cables need to be additionally designed, which not only increases the occupied area, but also produces multiple fault points due to the complex wiring and other reasons, and the above scheme excessively depends on the external auxiliary power supply, and when the auxiliary power supply fails or a control transformer fails, the switching switch cannot work normally, resulting in failure and affecting the stable operation of the power grid. SUMMARY

[0003] The utility model discloses to solve the technical problem of how to simplify the structure of the switching switch and ensure the stable operation of the power grid.

[0004] The utility model discloses to solve the technical problem of how to simplify the structure of the switching switch and ensure the stable operation of the power grid.

[0005] The scheme is based on the existing switching switch, and a voltage transformer is additionally arranged on the base, the voltage transformer is connected in parallel with the vacuum contactor, power supply is provided for the operating mechanism, the power supply structure of the switching switch is simplified, the stability of the power grid is improved, and specifically, the voltage transformer is connected to the input end of the vacuum contactor, the voltage transformer is connected to the operating mechanism below the vacuum contactor, when the input end of the vacuum contactor is connected to high-voltage electricity, the voltage transformer connected in parallel with the vacuum contactor is entered through the conductive part, and a low-voltage signal is output to the operating mechanism, so that the operating mechanism is controlled to drive, and the two adjacent voltage transformers are connected through the conductive part, forming a power supply chain, simplifying the power management of the switching switch, and improving the stability of the power grid.

[0006] In the high-voltage capacitor switching switch, the vacuum contactor comprises an insulating cylinder and an arc extinguishing chamber located in the insulating cylinder, the top end of the arc extinguishing chamber penetrates through the insulating cylinder to form an input end, and the arc extinguishing chamber is electrically connected with an output end on the insulating cylinder.

[0007] In the high-voltage capacitor switching switch, the arc extinguishing chamber and the operating mechanism are connected through an insulating pull rod, and a plurality of cooling fins are arranged on the insulating pull rod. By arranging the cooling fins on the insulating pull rod, heat accumulation at the insulating pull rod is avoided.

[0008] In the high-voltage capacitor switching switch, a conductive clamp is fixed on the input end, and the conductive clamp is connected with the voltage transformer through a connecting row.

[0009] In the high-voltage capacitor switching switch, the two adjacent voltage transformers are connected through a connecting aluminum row.

[0010] In the high-voltage capacitor switching switch, the operating mechanism is directly connected with the vacuum contactor, and the voltage transformer is sequentially arranged before and after the vacuum contactor.

[0011] In the high-voltage capacitor switching switch, a rubber pad is arranged between the insulating cylinder and the base. By arranging the rubber pad between the insulating cylinder and the base, the influence of frequent on-off of the operating mechanism on the base is reduced.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1、the application is based on the existing through operating mechanism drive vacuum contactor frequent on-off to realize reactive power compensation, through the parallel connection of the voltage transformer on the vacuum contactor, the input end of the vacuum contactor can output low voltage signal to the operating mechanism after being connected to high-voltage electricity, and the operating mechanism is provided with power supply, so that the arc extinguishing chamber in the vacuum contactor can be driven to move up and down, the frequent on-off of the vacuum contactor is completed, the power supply structure is simplified, and the use efficiency is improved. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the high-voltage switching switch;

[0015] Figure 2 This is a cross-sectional schematic diagram of the main view of this high-voltage switching switch;

[0016] Figure 3 This is a cross-sectional view of the right side of this high-voltage switching switch;

[0017] In the diagram, 1 is the base; 1a is the operating mechanism; 2 is the vacuum contactor; 2a is the arc-extinguishing chamber; 2b is the input terminal; 2c is the insulating pull rod; 2c1 is the heat sink; 2d is the insulating cylinder; 2e is the output terminal; 3 is the voltage transformer; 4 is the conductive component; 4a is the conductive clamp; 4b is the connecting bar; 4c is the connecting aluminum bar; and 5 is the rubber pad. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 and Figure 3 As shown, a high-voltage capacitor switching switch includes a base 1, a vacuum contactor 2, and a voltage transformer 3. The vacuum contactor 2 and the voltage transformer 3 are located above the base 1 and are arranged sequentially. The voltage transformer 3 and the vacuum contactor 2 are connected by a conductive element 4, which includes a conductive clip 4a, a connecting bar 4b, and a connecting aluminum bar 4c. The vacuum contactor 2 has an input terminal 2b located at the top and an output terminal 2e located on the side. There are two vacuum contactors 2 and two voltage transformers 3. One end of the voltage transformer 3 is connected to the input terminal 2b of the vacuum contactor 2 through the connecting bar 4b, and the other end of the voltage transformer 3 is connected to another voltage transformer 3 through the connecting aluminum bar 4c.

[0020] like Figure 2 and Figure 3 As shown, the hollow contactor of this application includes an insulating cylinder 2d and an arc-extinguishing chamber 2a. The top of the arc-extinguishing chamber 2a passes through an insulating rod 2c to form an input end 2b. The input end 2b is connected to the connecting bar 4b through a conductive clamp 4a. An operating mechanism 1a is also provided in the base 1. One end of the operating mechanism 1a extends upward and is connected to the arc-extinguishing chamber 2a through the insulating rod 2c. Several heat sinks 2c1 are provided on the insulating rod 2c. The voltage transformer 3 is connected to the operating mechanism 1a through a wire. The specific structure of the operating mechanism 1a is common knowledge to those skilled in the art and will not be described in detail here.

[0021] It is worth mentioning that the base 1 and the insulating cylinder 2d are provided with rubber pads 5, and one end of the operating mechanism 1a penetrates through the rubber pads 5 and is connected with the insulating pull rod 2c.

[0022] In summary, as a device that needs to be frequently turned on and off to realize reactive power compensation, since the switching switch is mainly realized by the frequent on-off of the vacuum contactor 2, on the basis of the existing high-voltage switching switch, a voltage transformer 3 is connected in parallel at the input end 2b of the vacuum contactor 2 to provide power supply for the operating mechanism 1a, so that the vacuum contactor 2 can be driven to realize on-off. Specifically, the voltage transformer 3 is connected in parallel at the input end 2b of the vacuum contactor 2, so that the high-voltage power input into the vacuum contactor 2 is grounded through the voltage transformer 3, and a low-voltage power signal is output to the operating mechanism 1a, so as to supply power to the operating mechanism 1a, so that the operating mechanism 1a can drive the arc-extinguishing chamber 2a in the vacuum contactor 2 to move up and down through the insulating pull rod 2c, thereby realizing the on-off of the vacuum contactor 2. Compared with the prior art of supplying power to the operating mechanism 1a by an external power supply, the present application does not need to additionally increase the external power supply for the operating mechanism 1a, and does not need to redesign a control circuit for controlling the power-on time of the operating mechanism 1a, thereby simplifying the structure of the switching switch. By arranging the conducting clamp 4a on the vacuum contactor 2 and connecting the voltage transformer 3 through the connecting row 4b, a branch for supplying power to the operating mechanism 1a is formed, thereby improving the reliability of the switching switch and ensuring the normal use of the switching switch.

[0023] In addition, two vacuum contactors 2 are adopted in the present application to provide redundancy backup for the use of the switching switch, and on this basis, the operating mechanism 1a corresponding to the vacuum contactor 2 is arranged in the base 1, and the connecting row 4b is arranged at the input end 2b of the two vacuum contactors 2 for connecting the voltage transformer 3 corresponding to the operating mechanism 1a, so as to ensure that the operating mechanism 1a can control the on-off of the vacuum contactor 2 in time, and the two voltage transformers 3 are connected through the aluminum connecting row.

[0024] It is worth mentioning that the base 1 and the insulating cylinder 2d are provided with rubber pads 5, and one end of the operating mechanism 1a penetrates through the rubber pads 5 and is connected with the insulating pull rod 2c.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0026] Although the terms such as 1, base; 1a, operating mechanism; 2, vacuum contactor; 2a, arc extinguishing chamber; 2b, input end; 2c, insulated pull rod; 2c1, cooling fin; 2d, insulated cylinder; 2e, output end; 3, voltage transformer; 4, electrically conductive part; 4a, electrically conductive clamp; 4b, coupling row; 4c, connected aluminum row; 5, rubber pad are used more in this article, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A high-voltage capacitor switching switch, comprising a base (1) and two vacuum contactors (2), two operating mechanisms (1a) corresponding to the vacuum contactors (2) are arranged in the base (1), and the top end of the vacuum contactors (2) is an input end (2b), characterized in that, The base (1) is provided with two voltage transformers (3) corresponding to the operating mechanism (1a), the input end (2b) is connected with one end of the voltage transformer (3) through the conductive part (4), the other ends of the two voltage transformers (3) are connected through the conductive part (4), and the voltage transformer (3) is used for providing power supply for the operating mechanism (1a), so that the operating mechanism (1a) can control the on-off of the vacuum contactor (2).

2. A high voltage capacitor switching switch according to claim 1, characterized in that, The vacuum contactor (2) comprises an insulation cylinder (2d) and an arc extinguishing chamber (2a) in the insulation cylinder (2d), the arc extinguishing chamber (2a) is provided with an input end (2b) formed by penetrating the insulation cylinder (2d), and the arc extinguishing chamber (2a) is electrically connected with an output end (2e) on the insulation cylinder (2d).

3. A high voltage capacitor switching switch according to claim 2, characterized in that The arc extinguishing chamber (2a) is connected with the operating mechanism (1a) through the insulation pull rod (2c), and the insulation pull rod (2c) is provided with a plurality of cooling fins (2c1).

4. A high voltage capacitor switching switch according to claim 2, characterized in that, The input end (2b) is fixedly provided with a conductive clamp (4a), and the conductive clamp (4a) is connected with the voltage transformer (3) through a connecting row (4b).

5. A high voltage capacitor switching switch according to claim 4, characterized in that The two adjacent voltage transformers (3) are connected through a connecting aluminum row (4c).

6. A high voltage capacitor-switch according to any of claims 2-5, characterized in that The operating mechanism (1a) is directly connected with the vacuum contactor (2), and the voltage transformer (3) is sequentially arranged in front of and behind the vacuum contactor (2).

7. A high voltage capacitor switching switch according to claim 6, characterized in that The insulation cylinder (2d) is provided with a rubber pad (5) between the base (1).

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