Arrangement structure for quick input of standby high-voltage reactor

Abstract

The utility model provides an arrangement structure for quick switching of a standby high-voltage reactor, which relates to the technical field of high-voltage power transmission and transformation, realizes quick removal of a fault phase and switching of a standby phase for use through switching operation of a double-fracture isolating switch, and comprises a three-phase outgoing line, the device comprises a main phase high-voltage reactor, three high-voltage reactors, a standby phase high-voltage reactor, three double-fracture isolation switches and a secondary wiring conversion box. A first wiring terminal of each double-break isolating switch is connected with the corresponding phase high-voltage reactor, a second wiring terminal of each double-break isolating switch is connected with the standby phase high-voltage reactor through a tubular bus, and a middle wiring terminal of each double-break isolating switch is connected to a corresponding phase outgoing line in parallel. When a certain phase of high-voltage reactor breaks down, isolation of a fault phase and input of a standby phase can be rapidly achieved through switching operation of the double-break isolation switch, the fault phase does not need to be dismantled, the standby phase does not need to be installed at the position of the fault phase, replacement time is saved, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power transmission and transformation technology, and in particular to an arrangement structure for the rapid deployment of a backup high-voltage reactor. Background Technology

[0002] In existing high-voltage power transmission and transformation technologies, high-voltage reactors are generally required to be installed on the outgoing side of substations with voltage levels of 500 kV and above. However, high-voltage reactors in the lines all have a certain failure rate, and the downtime of high-voltage reactor failures is generally long. In conventional designs, a spare phase high-voltage reactor is usually set up. In traditional designs, the spare phase high-voltage reactor needs to be replaced with the conventional phase via the track. However, after replacement, a primary conductor connection and secondary circuit debugging are still required, resulting in a long replacement time, generally 3-5 days. If the materials are not available during the replacement process, the replacement time will be even longer, causing the line to be unable to operate for a long time.

[0003] Therefore, it is necessary to improve the existing switching method for backup high-voltage reactors, and on the basis of ensuring safety, to increase the switching speed and reduce the replacement time as much as possible. Utility Model Content

[0004] This utility model provides an arrangement structure for the rapid deployment of a backup high-voltage reactor. Through the switching operation of a double-break disconnector, the faulty phase is quickly disconnected and the backup phase is put into use, reducing replacement time.

[0005] To achieve the above objectives, this utility model discloses an arrangement structure for the rapid deployment of a standby high-voltage reactor, comprising three-phase outgoing lines, namely phase A, phase B, and phase C, a high-voltage reactor group, and a secondary wiring conversion box. The phase A, phase B, and phase C lines are electrically connected to the first, second, and third high-voltage reactors in the high-voltage reactor group, respectively. Its characteristic is that:

[0006] It also includes a spare phase high-voltage reactor and three double-break disconnect switches;

[0007] The standby phase high-voltage reactor, the first high-voltage reactor, the second high-voltage reactor, and the third high-voltage reactor are connected in parallel.

[0008] Each of the aforementioned double-break disconnect switches includes a first terminal block, an intermediate terminal block, a second terminal block, a first switch, and a second switch;

[0009] Each of the aforementioned double-break disconnect switches is electrically connected to the A-phase line, B-phase line, and C-phase line respectively. The first terminal of each of the aforementioned double-break disconnect switches is electrically connected to the first high-voltage reactor, the second high-voltage reactor, and the third high-voltage reactor respectively. The second terminal is electrically connected to the spare phase high-voltage reactor. The intermediate terminal is connected in parallel with the corresponding phase outgoing line.

[0010] The secondary wiring conversion box is electrically connected to the standby phase high-voltage reactor, the first high-voltage reactor, the second high-voltage reactor, and the third high-voltage reactor, respectively.

[0011] Furthermore, the standby phase high-voltage reactor is electrically connected to the second terminals of three double-break disconnect switches via a tubular busbar.

[0012] Furthermore, it also includes a neutral point reactor, which is electrically connected to the first high-voltage reactor, the second high-voltage reactor, the third high-voltage reactor and the standby phase high-voltage reactor via a tubular busbar.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) This utility model patent can realize the rapid withdrawal of the faulty phase and the rapid commissioning of the spare phase. It does not require the removal of the faulty phase. The spare phase is installed at the location of the faulty phase, saving replacement time and reducing replacement costs.

[0015] (2) This utility model does not change the original layout of the substation, and the energized distance between equipment can be easily met.

[0016] (3) The equipment used in this utility model is all conventional equipment, without any special equipment, and the layout is easy to realize. Attached Figure Description

[0017] Figure 1 This is a wiring diagram of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0019] Please see Figure 1 A rapid deployment arrangement for backup high-voltage reactors includes three-phase outgoing lines, namely phase A, phase B, and phase C; a high-voltage reactor group 1 and a secondary wiring conversion box (not shown in the figure); phase A, phase B, and phase C are electrically connected to the first high-voltage reactor 11, the second high-voltage reactor 12, and the third high-voltage reactor 13 in the high-voltage reactor group 1, respectively. Its characteristic is that:

[0020] It also includes a spare phase high-voltage reactor 14 and three double-break disconnect switches 21, 22 and 23;

[0021] The standby high-voltage reactor 14, the first high-voltage reactor 11, the second high-voltage reactor 12, and the third high-voltage reactor 13 are connected in parallel.

[0022] Each of the aforementioned double-break disconnect switches 21, 22, and 23 includes a first terminal block 31, an intermediate terminal block 32, a second terminal block 33, a first switch 34, and a second switch 35;

[0023] Each of the double-break disconnect switches 21, 22, and 23 is respectively connected to the A-phase line, B-phase line, and C-phase line. The first terminal 31 of each of the double-break disconnect switches 21, 22, and 23 is electrically connected to the first high-voltage reactor 11, the second high-voltage reactor 12, and the third high-voltage reactor 13, respectively. The second terminal 33 is electrically connected to the spare phase high-voltage reactor 14. The intermediate terminal 32 is connected in parallel with the corresponding phase outgoing line.

[0024] The secondary wiring conversion box is electrically connected to the standby phase high-voltage reactor 14, the first high-voltage reactor 11, the second high-voltage reactor 12 and the third high-voltage reactor 13 respectively.

[0025] During normal operation, the first switch 34 of each double-break disconnector switch 21, 22, and 23 on the three-phase line is in the closed state, while the second switch 35 on the standby phase side is in the open state. When a fault occurs in one phase, the first switch 34 on the faulty phase side is opened, and the second switch 35 of the double-break disconnector switch is closed. At the same time, the signal in the secondary wiring conversion box is transmitted to the back-end system, and the relevant secondary signal of the standby phase high-voltage reactor 14 is used to replace the signal of the faulty phase, quickly isolating the faulty phase and putting the standby phase into use to achieve the protection function.

[0026] Specifically, the standby phase high-voltage reactor 14 is electrically connected to the second terminal 33 of three double-break disconnect switches 21, 22, and 23 via a tubular busbar, enabling rapid activation of the standby phase without altering the original substation layout and without requiring power outages for replacement.

[0027] Specifically, it also includes a neutral point reactor 4, which is electrically connected to the first high-voltage reactor 11, the second high-voltage reactor 12, the third high-voltage reactor 13 and the standby phase high-voltage reactor 14 via a tubular busbar, thereby reducing the impact of fault current on system stability and preventing maloperation of protection devices.

[0028] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A standby high-voltage reactor quick-put-in arrangement, comprising three-phase outgoing line, respectively A-phase line, B-phase line, C-phase line, high-voltage reactor group (1) and secondary wiring conversion box, the A-phase line, B-phase line, C-phase line are respectively connected with the first high-voltage reactor (11), the second high-voltage reactor (12), the third high-voltage reactor (13) in the high-voltage reactor group (1), characterized in that: it further comprises a standby phase high-voltage reactor (14) and three double-break disconnectors (21, 22, 23); The standby phase high-voltage reactor (14), the first high-voltage reactor (11), the second high-voltage reactor (12), and the third high-voltage reactor (13) are connected in parallel with each other; Each of the double-break disconnectors (21, 22, 23) comprises a first wiring terminal (31), an intermediate wiring terminal (32), a second wiring terminal (33), a first switch (34) and a second switch (35); Each of the double-break disconnectors (21, 22, 23) is connected to the A-phase line, B-phase line, C-phase line respectively, the first wiring terminal (31) of each of the double-break disconnectors (21, 22, 23) is connected to the first high-voltage reactor (11), the second high-voltage reactor (12), and the third high-voltage reactor (13) respectively, the second wiring terminal (33) is connected to the standby phase high-voltage reactor (14), and the intermediate wiring terminal (32) is connected in parallel with the corresponding phase outgoing line; The secondary wiring conversion box is connected to the standby phase high-voltage reactor (14), the first high-voltage reactor (11), the second high-voltage reactor (12), and the third high-voltage reactor (13) respectively. The standby phase high-voltage reactor (14) is connected to the second wiring terminal (33) of the three double-break disconnectors (21, 22, 23) through a tubular bus.

2. An arrangement for fast switching in of a backup high voltage reactor according to claim 1, characterized in that: It further comprises a neutral-point reactor (4), which is connected to the first high-voltage reactor (11), the second high-voltage reactor (12), the third high-voltage reactor (13), and the standby phase high-voltage reactor (14) through a tubular bus.

3. An arrangement for fast switching in of a backup high voltage reactor according to claim 1, characterized in that: ​

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