High-voltage heavy harmonic compensation cabinet

Abstract

The utility model discloses a high-voltage heavy harmonic compensation cabinet, which comprises a cabinet body and an upper-stage closing circuit arranged outside the cabinet body, and the upper-stage closing circuit is used for realizing the on-off of an upper-stage loop; the power distribution cabinet further comprises a monitoring circuit arranged in the cabinet body, and the monitoring circuit is used for protecting the cabinet body. The utility model belongs to the technical field of high-voltage heavy harmonic compensation, and particularly relates to a high-voltage heavy harmonic compensation cabinet.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage retuning and compensation, and in particular relates to a high-voltage retuning and compensation cabinet. Background Art

[0002] When the compensation capacity of a 10kV high-voltage resonant compensation cabinet is large, the size of the corresponding capacitors and reactors becomes larger and cannot be fully installed in the high-voltage cabinet. According to the operating environment conditions, the reactor is generally installed outside the cabinet (overlapping installation behind the cabinet) and extended to the primary busbar. To ensure safety, fences are installed on both sides of the high-voltage cabinet and around the reactor for protection and isolation to prevent people and small animals from entering and causing accidents.

[0003] At present, the maintenance access door of the reactor of this type of product is only protected by a simple padlock and is manually controlled by maintenance personnel, which may inevitably lead to electric shock accidents due to misoperation. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing equipment is only simply protected by a padlock and is manually controlled by maintenance personnel, and electric shock accidents caused by misoperation are unavoidable.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a high-voltage retuning compensation cabinet, including a cabinet body, and an upper-level closing circuit arranged outside the cabinet body, and the upper-level closing circuit is used to realize the opening and closing of the upper-level circuit; it also includes a monitoring circuit arranged in the cabinet body, and the monitoring circuit is used to protect the cabinet body.

[0006] Furthermore, the upper closing circuit includes a travel switch 1, an auxiliary switch and a travel switch 2, and the travel switch 1, the auxiliary switch and the travel switch 2 are connected in series to form a closed-loop branch 1.

[0007] Furthermore, the monitoring circuit includes an AC micro-breaker 2P, a travel switch three and an online monitoring device, and the AC micro-breaker 2P, the travel switch three and the online monitoring device are connected in series to form a closed-loop branch two.

[0008] Furthermore, one end of the travel switch 1 is connected to the auxiliary switch through a wire, and the other end is connected to the upper original power supply through a wire. One end of the travel switch 2 is connected to the auxiliary switch through a wire, and the other end is connected to the zero potential end of the upper power supply through a wire.

[0009] Furthermore, the travel switch three is fixedly connected to the cabinet door switch position, the online monitoring device is fixedly connected to the cabinet door switch position, and the travel switch three and the online monitoring device are connected via a wire.

[0010] Furthermore, an AC power source is connected between the AC micro-breakers 2P.

[0011] After adopting the above structure, the utility model has the following beneficial effects:

[0012] The dual linkage protection of the superior closing circuit (the switch at the main busbar incoming end of the compensation cabinet) and the monitoring device of this cabinet implements rigid procedural protection measures to avoid electric shock accidents caused by maintenance personnel's misoperation, providing a strong guarantee for the safety of high-voltage power distribution and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] Figure 1 It is a schematic diagram of the overall structure proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the upper closing circuit proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the monitoring circuit proposed by the utility model.

[0017] In the attached drawings: 1. cabinet, 2. upper closing circuit, 3. monitoring circuit, 1SQ, travel switch 1, QS, auxiliary switch, SQZ, travel switch 2, JDn, AC micro-breaker 2P, nSQ, travel switch 3, CM, online monitoring device. DETAILED DESCRIPTION

[0018] like Figure 1-2 -3 shows a high-voltage retuning compensation cabinet, which includes a cabinet body 1, and an upper closing circuit 2 arranged outside the cabinet body 1, and the upper closing circuit 2 is used to realize the opening and closing of the upper circuit; it also includes a monitoring circuit 3 arranged in the cabinet body 1, and the monitoring circuit 3 is used to protect the cabinet body 1.

[0019] like Figure 2 As shown, the upper closing circuit 2 includes a travel switch 1SQ, an auxiliary switch QS and a travel switch 2SQZ, which are connected in series to form a closed-loop branch 1.

[0020] like Figure 3 As shown, the monitoring circuit 3 includes an AC micro-breaker 2PJDn, a travel switch 3 nSQ and an online monitoring device CM, and the AC micro-breaker 2PJDn, the travel switch 3 nSQ and the online monitoring device CM are connected in series to form a closed-loop branch 2.

[0021] Among them, one end of the travel switch 1SQ is connected to the auxiliary switch QS through a wire, and the other end is connected to the upper original power supply through a wire, one end of the travel switch 2SQZ is connected to the auxiliary switch QS through a wire, and the other end is connected to the zero potential end of the upper power supply through a wire, the travel switch 3nSQ is fixedly connected to the cabinet door switch position, the online monitoring device CM is fixedly connected to the cabinet door switch position, the travel switch 3nSQ is connected to the online monitoring device CM through a wire, and an AC power supply is connected between the AC micro-breaker 2PJDn.

[0022] During specific use, a travel switch 3nSQ is installed at an appropriate position in the cabinet door frame, and the cabinet door switch position is converted into an electrical signal (one open and one closed) through the travel switch 3nSQ. The normally closed contact is connected in series to the online monitoring device CM of this cabinet, and the normally open contact is connected in series to the superior closing circuit 2. Only when all cabinet doors and fence doors are closed, and the online monitoring device CM of this cabinet also receives the cabinet door signal at the same time, and its internal logical operation and protection function are turned on, the superior closing circuit 2 is closed and energized, and the high-voltage re-tuning compensation cabinet can be closed and put into operation. If the compensation circuit has overvoltage, overcurrent and other faults, the online monitoring device CM will immediately disconnect the compensation circuit through the AC micro-breaker 2PJDn to form a safe and reliable interlocking system, which meets the safe operation and personnel protection of the high-voltage cabinet of this typical scheme (KCCC).

[0023] Although the embodiments of the utility model have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. In short, if those skilled in the art are inspired by them and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the scope of protection of the utility model.

Claims

1. A high voltage retuning compensation cabinet, characterized in that: It includes a cabinet body, and an upper closing circuit arranged outside the cabinet body, wherein the upper closing circuit is used to realize the on-off of the upper circuit; and also includes a monitoring circuit arranged inside the cabinet body, wherein the monitoring circuit is used to protect the cabinet body.

2. A high voltage retuning compensation cabinet according to claim 1, characterized in that: The upper closing circuit comprises a travel switch 1, an auxiliary switch and a travel switch 2, and the travel switch 1, the auxiliary switch and the travel switch 2 are connected in series to form a closed-loop branch 1.

3. A high voltage retuning compensation cabinet according to claim 2, characterized in that: One end of the travel switch 1 is connected to the auxiliary switch through a wire, and the other end is connected to the upper original power supply through a wire. One end of the travel switch 2 is connected to the auxiliary switch through a wire, and the other end is connected to the zero potential end of the upper power supply through a wire.

4. A high voltage retuning compensation cabinet according to claim 1, characterized in that: The monitoring circuit includes an AC micro-breaker 2P, a travel switch 3 and an online monitoring device, and the AC micro-breaker 2P, the travel switch 3 and the online monitoring device are connected in series to form a closed-loop branch 2.

5. A high voltage retuning compensation cabinet according to claim 4, characterized in that: The travel switch three is fixedly connected to the cabinet door switch position, the online monitoring device is fixedly connected to the cabinet door switch position, and the travel switch three is connected to the online monitoring device through a wire.

6. A high voltage retuning compensation cabinet according to claim 4, characterized in that: An AC power source is connected between the AC micro-breakers 2P.

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