High-voltage parallel capacitor device

Abstract

The utility model belongs to the field of high-voltage transmission equipment, and particularly relates to a high-voltage parallel capacitor device which comprises a capacitor bank and a discharge coil which are stacked up and down, the front end face of the capacitor bank is a plane where a capacitor unit wiring terminal is located, and the discharge coil is arranged on the left side or the right side of the capacitor bank. The discharge coil comprises a body, an inlet wire binding post and an outlet wire binding post, the bottom end of the inlet wire binding post and the bottom end of the outlet wire binding post are connected with the body, and the top end of the inlet wire binding post and the top end of the outlet wire binding post are provided with an inlet wire sleeve and an outlet wire sleeve respectively. The body is arranged close to the front end face of the capacitor bank, so that the wire inlet binding post and the wire outlet binding post protrude out of the outer side of the front end face of the capacitor bank, the wire inlet binding post points to the front upper portion, and the wire outlet binding post points to the front lower portion. The device has the advantages of being simple in structure, high in space utilization rate, good in stability and easy to maintain.

Description

Technical Field

[0001] The utility model belongs to the field of high - voltage power transmission equipment, and particularly relates to a high - voltage shunt capacitor device. Background Art

[0002] In today's complex and efficient power transmission system, the stable operation of shunt capacitor devices is crucial. The structure of a high - voltage shunt capacitor device generally includes multiple stacked capacitor banks and discharge coils. The capacitor bank is composed of multiple juxtaposed vertically or horizontally placed capacitor units and is fixed within a capacitor framework. The wiring terminals of the capacitor units within the same capacitor bank are arranged in the same direction (forward). The connection terminals of the discharge coil are electrically connected to the wiring terminals of the upper and lower capacitor banks (capacitor units). Its function is to discharge the capacitor to achieve the purpose of protecting equipment and ensuring the safe operation of personnel. Since the high - voltage shunt capacitor device is in a high - voltage environment, the position setting of the discharge coil must consider the safety clearance between its own connection terminals and between capacitor banks. See Figure 3 , in the prior - art high - voltage shunt capacitor device, the discharge coil is usually installed beside the capacitor bank and fixed to one side of the capacitor framework 5 through a connection seat 6. The connection terminals of the discharge coil are arranged upward. To ensure the safety clearance, the connection wires (conductive bands) between the connection terminals of the discharge coil and the upper and lower capacitor banks (capacitor unit connection terminals) need to be specially deployed. A guiding mounting frame 7 is used to guide in the vertical and horizontal directions to increase the distance from the capacitor bank. The guiding mounting frame 7 is fixed to the capacitor framework 5 and the discharge - coil connection seat 6 through insulators. The existing installation method of the discharge coil has complex wiring. The guiding mounting frame 7 increases the volume and weight of the entire device, raises the center of gravity of the entire device, and is easily affected by external factors (such as vibration, inclination, etc.), resulting in reduced stability. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a high - voltage shunt capacitor device with a simple structure and good stability to overcome the problems existing in the prior art.

[0004] The technical solutions for achieving the above - mentioned purpose include the following content.

[0005] A high-voltage shunt capacitor device includes a capacitor bank and a discharge coil stacked up and down. The capacitor bank is installed in a capacitor frame. The front end face of the capacitor bank is the surface where the capacitor unit connection terminals are located. The discharge coil is arranged on the left or right side of the capacitor bank and is installed on the outside of the capacitor frame through a connection seat. A unit bushing is provided on the capacitor unit connection terminal. The discharge coil includes a body, an incoming line connection terminal, and an outgoing line connection terminal. The bottom ends of the incoming line connection terminal and the outgoing line connection terminal are connected to the body. Inlet bushings and outlet bushings are respectively provided at the top ends of the incoming line connection terminal and the outgoing line connection terminal. Different from the prior art, the body is arranged close to the front end face of the capacitor bank, so that the incoming line connection terminal and the outgoing line connection terminal protrude outside the front end face of the capacitor bank. The incoming line connection terminal points forward and upward, and the outgoing line connection terminal points forward and downward. During use, the safety clearances between the inlet and outlet bushings and the capacitor unit bushings are met.

[0006] Further, the body is cylindrical, and the bottom ends of the incoming line connection terminal and the outgoing line connection terminal are connected to the side surface of the body.

[0007] Further, two back-to-back capacitor banks are provided on each layer.

[0008] Further, the capacitor banks of each two layers are installed in the same capacitor frame in an equipotential manner.

[0009] Further, it includes two such capacitor frames stacked up and down, and the two capacitor frames are connected by insulators.

[0010] In the high-voltage shunt capacitor device of the present utility model, since the incoming line connection terminal (A end) and the outgoing line connection terminal (X end) of the discharge coil protrude outside the front end face of the capacitor bank and face the same side as the capacitor unit connection terminals, and the incoming line connection terminal (A end) points forward and upward, and the outgoing line connection terminal (X end) points forward and downward, the positions and directions of the incoming line connection terminal (A end) and the outgoing line connection terminal (X end) ensure their own safety clearances and the safety clearances from the capacitor bank. When making cable connections, the inlet bushing can be directly connected to the unit bushing (or incoming line bus) of the upper-layer capacitor bank by a crimping terminal (copper nose), and the outlet bushing can be directly connected to the connection terminal (or outgoing line bus) of the lower-layer capacitor bank by a crimping terminal (copper nose), without additionally installing a guiding frame to guide the connecting wires.

[0011] The high-voltage shunt capacitor device of the present utility model has the following advantages. First, it has a simple structure and is easy to install. Compared with the prior art, the present utility model omits the wire guiding frame. When connecting the wires, the wiring terminals of the discharge coil and the capacitor wiring terminals are directly connected by crimping terminals (copper noses), which simplifies the installation steps and improves the work efficiency. Second, it is light in weight and small in size, which is beneficial to improving the stability of the whole device. Third, it has a low cost and is easy to maintain. The wire guiding frame of the existing structure increases the weight, as well as the manufacturing and installation costs. The redundant structure also leads to an increase in the failure rate. The high-voltage shunt capacitor device of the present utility model corrects the aforementioned disadvantages. Fourth, compared with the prior art, it improves the compactness and rationality of the overall layout and increases the space occupancy rate. Description of the Drawings

[0012] Figure 1 Schematic diagram of the partial structure of the high-voltage shunt capacitor device for the embodiment;

[0013] Figure 2 is Figure 1 Enlarged view of part A in

[0014] Figure 3 Schematic diagram of the partial structure of the high-voltage shunt capacitor device of the prior art.

[0015] In the figure, 1. Capacitor bank; 2. Discharge coil; 2-1. Incoming line terminal; 2-2. Outgoing line terminal; 3. Insulator; 4. Crimping terminal; 5. Capacitor frame; 6. Connection seat; 7. Guiding mounting frame. Detailed Embodiment

[0016] The present utility model will be specifically described below in conjunction with the embodiments.

[0017] See Figure 1 and Figure 2, An embodiment provides a shunt capacitor device suitable for outdoor 66 kV, which includes two capacitor frames 5 stacked up and down and connected by insulators 3. Upper and lower layers of capacitor banks 1 are installed equipotentially inside the capacitor frames 5. Each layer of the capacitor bank consists of two back-to-back capacitor banks. The capacitor units inside the capacitor bank 1 are arranged vertically, and the wiring terminals of the capacitor units are all arranged outside the front end face of the capacitor bank 1. The ends of the wiring terminals of the capacitor units are unit bushings. A connection seat 6 for installing a discharge coil 2 is provided on the left outer side of the capacitor frame 5. A discharge coil 2 is fixed at each of the front and rear ends of the connection seat 6. The discharge coil 2 includes a cylindrical body and an incoming line connection post 2-1 and an outgoing line connection post 2-2 installed on the body. The cylindrical body is arranged in the left-right direction. The incoming line connection post 2-1 and the outgoing line connection post 2-2 protrude outside the front end face of the capacitor bank 1, and the incoming line connection post 2-1 points forward and upward, and the outgoing line connection post 2-2 points forward and downward. Incoming line bushings and outgoing line bushings are respectively provided at the tops of the incoming line connection post 2-1 and the outgoing line connection post 2-2. During use, the incoming and outgoing line bushings and the unit bushings of the capacitor units satisfy the safety clearance. The incoming line bushing on the incoming line connection post 2-1 (A end) of the discharge coil 2 on the outer side of the upper capacitor frame 5 uses a crimping terminal 4 (copper nose) and is directly connected to the upper incoming line bus to achieve electrical connection. The outgoing line bushing on the outgoing line connection post 2-2 (X end) of the discharge coil 2 uses a crimping terminal 4 (copper nose) and is directly connected to the lower capacitor unit bushing to achieve electrical connection. The incoming line bushing on the incoming line connection post 2-1 (A end) of the discharge coil 2 on the outer side of the lower capacitor frame 5 uses a crimping terminal 4 (copper nose) and is directly connected to the upper capacitor unit bushing to achieve electrical connection. The outgoing line bushing on the outgoing line connection post 2-2 (X end) of the discharge coil 2 uses a crimping terminal 4 (copper nose) and is directly connected to the lower outgoing line bus to achieve electrical connection.

[0018] The incoming and outgoing line connection posts on the discharge coil 2 of the high-voltage shunt capacitor device of this embodiment protrude outside the plane (front end face) where the capacitor bank connection posts are located, and point forward and upward and forward and downward respectively, ensuring its own safety clearance and the safety clearance from the capacitor bank 1. When making electrical connections, it is only necessary to directly connect the wires to the bushings, and there is no need to additionally set up a guiding installation frame 7 to guide the wires. Therefore, compared with the prior art (see Figure 3 ), it has the advantages of a simple structure and easy installation. The whole device is smaller in volume and lighter in weight, and can effectively improve the stability of the high-voltage shunt capacitor device.

Claims

1. A high-voltage parallel capacitor device, comprising a capacitor bank and a discharge coil stacked up and down, the capacitor bank is installed in a capacitor frame, the front end face of the capacitor bank is the face where the capacitor unit terminal is located, the discharge coil is arranged on the left or right side of the capacitor bank and is installed on the outside of the capacitor frame through a connecting seat, the capacitor unit terminal is provided with a unit bushing, the discharge coil comprises a body, an incoming wire terminal and an outgoing wire terminal, the bottom ends of the incoming wire terminal and the outgoing wire terminal are connected to the body, and the top ends of the incoming wire terminal and the outgoing wire terminal are provided with an incoming wire bushing and an outgoing wire bushing respectively, characterized in that, The main body is arranged near the front end face of the capacitor group so that the incoming wire terminal and the outgoing wire terminal protrude outside the front end face of the capacitor group, the incoming wire terminal points to the front and upward, and the outgoing wire terminal points to the front and downward. When in use, the incoming and outgoing wire bushings meet the safety clearance with the capacitor unit bushing.

2. The high voltage parallel capacitor device according to claim 1, characterized in that: The body is in a cylindrical shape, and the bottom ends of the incoming wiring post and the outgoing wiring post are connected to the side surface of the body.

3. The high voltage parallel capacitor device according to claim 1, characterized in that: Each layer has two back-to-back capacitor banks.

4. The high voltage parallel capacitor device according to claim 1, characterized in that: The capacitor banks of every two layers are installed in the same capacitor frame with equipotential.

5. The high voltage parallel capacitor device according to claim 4, characterized in that: It comprises two capacitor frames stacked up and down, and the two capacitor frames are connected via an insulator.

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