Nuclear power unit re-power supply device and maintenance system

Abstract

The utility model provides a nuclear power unit re-power supply device and a maintenance system, and relates to the technical field of nuclear power operation, and the device comprises an upstream switchboard unit which supplies power to two columns of parallel maintenance switchboards; the first end of the re-power supply branch line is electrically connected with the upstream switchboard unit, and the second end of the re-power supply branch line sequentially passes through all the columns of power distribution room units and supplies power to all the columns of power distribution room units. According to the utility model, one repower supply special disc cabinet is arranged in each power distribution room, so that nearly hundreds of meters of cables can be reduced for each repower supply, and the implementation difficulty of the repower supply is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power operation, in particular to a nuclear power unit repowering device and a maintenance system. Background Art

[0002] A nuclear power plant is a basic power generation unit consisting of a reactor and its supporting steam turbine generator set, as well as the systems and facilities required to maintain their normal operation and ensure safety.

[0003] Existing nuclear power plants are usually arranged in three independent plant buildings. However, due to the long distance between the plant buildings, it is necessary to pull hundreds of meters of cables when resupplying the power, which makes it difficult to resupply the power during the overhaul. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the utility model is to provide a nuclear power unit repowering device and maintenance system, which is used to solve the problem in the prior art that the repowering process is difficult to implement because the various plant buildings of the nuclear power units are arranged independently of each other and the repowering requires pulling hundreds of meters of cables.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a nuclear power unit repowering device, including: an upstream distribution board unit, which supplies power to two columns of parallel maintenance distribution boards; a repower supply branch line, the first end of which is electrically connected to the upstream distribution board unit, and a distribution room unit, the second end of which passes through each column of distribution room units in turn and supplies power to each column of distribution room units.

[0006] In one embodiment of the utility model, the upstream distribution panel unit includes: an upstream distribution panel, a main distribution line, and a branch line. The upstream distribution panel is electrically connected to the first end of the main distribution line, the first ends of several branch lines and the first ends of the re-supply branches are respectively electrically connected to the second end of the main distribution line, and the second end of the branch line is electrically connected to the corresponding two rows of parallel maintenance distribution panels.

[0007] In one embodiment of the present invention, the upstream switchboard is a LKZ (low voltage AC power system) switchboard.

[0008] In one embodiment of the present invention, the power distribution room unit comprises: a power distribution room; and a resupply panel device, the resupply panel device is arranged in the power distribution room, and the resupply panel device is electrically connected to the resupply branch line.

[0009] In one embodiment of the present invention, the repowering disk device includes: a repowering disk; and a repowering wire, wherein a first end of the repowering wire is electrically connected to the repowering disk, and a second end of the repowering wire is electrically connected to the repowering branch line.

[0010] In one embodiment of the present invention, the repowering panel device further includes: an on-site repowering box, and a plurality of on-site repowering boxes are electrically connected to the repowering panel via power supply lines to repower the emergency equipment corresponding to the power distribution room.

[0011] In one embodiment of the present invention, a power distribution room is provided with a cable hole, and the resupply wiring passes through the cable hole to be electrically connected to the resupply branch line.

[0012] In one embodiment of the present invention, the resupply wiring and the resupply branch line are connected via an embedded component.

[0013] In one embodiment of the present invention, a plurality of power distribution room units are arranged independently of each other.

[0014] The utility model also provides a nuclear power unit maintenance system, comprising the aforementioned nuclear power unit repowering device.

[0015] Beneficial effects of the utility model: The utility model proposes a repower supply device and maintenance system for a nuclear power unit. The repower supply device and maintenance system repower two parallel maintenance switchboards by using the upstream switchboard unit, and at the same time, repower the repower supply switchboards in each switchroom by using the repower supply branch line connected to the upstream switchboard unit at one end to be arranged in sequence through each switchroom. This ensures that when a switchroom in a certain row needs to be repowered in the future, it is not necessary to draw power from the switchroom in the adjacent row, and repower can be performed from the switchroom in the certain row, thereby effectively reducing the length of the repower cable and further reducing the difficulty of implementing repowering. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the structure of the nuclear power unit repower supply device.

[0017] Component number description

[0018] Upstream switchboard unit 1; two parallel maintenance switchboards 2; resupply branch line 3; switch room unit 4; upstream switchboard 11; main distribution line 12; branch line 13; switch room 41; resupply switchboard device 42; resupply switchboard 421; resupply wiring 422; local resupply box 423. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0021] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0022] See also Figure 1 The utility model provides a repower supply device for a nuclear power unit, comprising: an upstream switchboard unit 1, the upstream switchboard unit 1 supplies power to two parallel maintenance switchboards 2; a repower supply branch line 3, the first end of the repower supply branch line 3 is electrically connected to the upstream switchboard unit 1, and a distribution room unit 4, the second end of the repower supply branch line 3 passes through each column of distribution room units 4 in sequence and supplies power to each column of distribution room units 4.

[0023] It is not difficult to find from the above content that in the process of re-powering the nuclear power unit during the overhaul by using two parallel maintenance switchboards 2, the upstream switchboard unit 1 is connected to the two parallel maintenance switchboards 2, so as to realize the re-powering during the overhaul of the two parallel maintenance switchboards 2. At the same time, while the upstream switchboard unit 1 is used as an introduced power source to provide power to the two parallel maintenance switchboards 2, the upstream switchboard unit 1 is also connected to the re-powering branch line 3. In order to realize the use of the power provided by the upstream switchboard unit 1 to power each distribution room unit 4, it can be realized that while the upstream switchboard unit 1 provides power for the two parallel maintenance, it can also provide power for each column of distribution room units 4 during the overhaul. Moreover, since the distance between each column of distribution room units 4 is relatively far, by using the re-powering branch line 3 to reach each column of distribution room units 4 in turn, when each column room needs to be re-powered in the future, it is not necessary to take power from its adjacent room, and re-power can be performed from the room of the current column. The length of cables used for repowering can be effectively saved, thereby reducing the difficulty of implementing repowering.

[0024] like Figure 1 As shown, the upstream distribution board unit 1 includes: an upstream distribution board 11, a main distribution line 12, and a branch line 13. The upstream distribution board 11 is electrically connected to the first end of the main distribution line 12, the first ends of several branch lines 13 and the first ends of the re-supply branch lines 3 are respectively electrically connected to the second end of the main distribution line 12, and the second ends of the branch lines 13 are electrically connected to the corresponding two columns of parallel maintenance distribution boards 2.

[0025] In one embodiment of the utility model, when the upstream switchboard unit 1 is used as a power supply to provide power to two parallel maintenance switchboards 2 and the re-supply branch line 3 respectively, the upstream switchboard 11 is used as a power input power source. The power is transmitted to the branch line 13 corresponding to each of the two parallel maintenance switchboards 2 through the distribution main line 12, and finally the two parallel maintenance switchboards 2 are supplied with power, thereby ensuring the re-supply of the two parallel maintenance switchboards 2 during the overhaul. Similarly, the power is transmitted to the re-supply branch line 3 through the upstream switchboard 11 through the distribution main line 12, and the power distribution room units 4 of each column are supplied with power through the re-supply branch line 3, thereby ensuring the re-supply of the power distribution room units 4 of each column during the overhaul, thereby effectively reducing the difficulty of re-supplying the nuclear power unit during the overhaul.

[0026] Preferably, the upstream switchboard 11 is a LKZ (low voltage AC power system) switchboard. In this embodiment, when the upstream switchboard 11 is used to provide power to the two parallel maintenance switchboards 2 and the re-supply branch line 3, the upstream switchboard 11 can be powered by the 9LGI switchboard (public and plant area 6.6KV switchboard system) to the 1LKZ switchboard (AA plant low voltage AC power 380V system), and then the 1LKZ switchboard further supplies power to the two parallel maintenance switchboards 2 and the re-supply branch line 3 through the distribution main line 12.

[0027] Furthermore, the power distribution room unit 4 includes: a power distribution room 41 ; and a resupply panel device 42 . The resupply panel device 42 is disposed in the power distribution room 41 , and the resupply panel device 42 is electrically connected to the resupply branch line 3 .

[0028] In one embodiment of the utility model, when the power distribution room unit 4 supplies power, it supplies power to the repowering panel device 42 in the power distribution room 41 through the repowering branch line 3. Thus, the repowering panel device 42 in each power distribution room 41 is powered, and when the rooms in this row need to be repowered in the future, it is not necessary to take power from the adjacent rooms, but only to supply power through the repowering panel device 42 in the power distribution room 41 in this row.

[0029] Furthermore, the repowering disk device 42 includes: a repowering disk 421; and a repowering wiring 422, wherein a first end of the repowering wiring 422 is electrically connected to the repowering disk 421, and a second end of the repowering wiring 422 is electrically connected to the repowering branch line 3.

[0030] In one embodiment of the utility model, when the repowering panel device 42 repowers the emergency equipment in the room that needs repowering, the repowering panel 421 is connected to the repowering branch line 3 of the power transmission by using the repowering wiring 422, so as to realize repowering of the repowering panel 421 in each row of the distribution room 41 to repower the emergency equipment in the room.

[0031] Specifically, the repowering panel device 42 further includes: an on-site repowering box 423, and a plurality of on-site repowering boxes 423 are electrically connected to the repowering panel 421 through power lines to repower the emergency equipment corresponding to the power distribution room 41. In this embodiment, the on-site repowering box 423 is a safety device to ensure the safe and reliable operation of the nuclear power plant, and is necessary for safe shutdown of the reactor, complete shell isolation, core cooling, and heat removal from the containment and the reactor.

[0032] Furthermore, the power distribution room 41 is provided with a cable hole, and the re-power supply wiring 422 passes through the cable hole to be electrically connected to the re-power supply branch line 3. In this embodiment, by opening a cable hole in each row of power distribution rooms 41, the other end of the re-power supply wiring 422 connected to the re-power supply plate 421 passes through the cable hole to be connected to the re-power supply branch line 3, thereby realizing the re-power supply of each row of power distribution rooms 41 through the re-power supply branch line 3.

[0033] Furthermore, the repowering wiring 422 is connected to the repowering branch line 3 through an embedded part. In this embodiment, when the repowering wiring 422 is connected to the repowering branch line 3, the repowering wiring 422 and the repowering branch line 3 can be connected by using an embedded part to realize the embedded setting after the embedded part is installed.

[0034] Furthermore, several power distribution room units 4 are arranged independently of each other. In this embodiment, in a nuclear power unit, the power distribution room unit 4 can be composed of three rows of plant buildings and are independently arranged. The repower supply branch line 3 is passed through each power distribution room unit 4 in sequence to repower, which can effectively reduce the length of the repower supply cable.

[0035] The utility model also provides a nuclear power unit maintenance system, comprising the aforementioned nuclear power unit repowering device.

[0036] In summary, the utility model uses the upstream switchboard unit 1 to re-supply the two parallel maintenance switchboards 2, and uses the re-supply branch line 3 connected to the upstream switchboard unit 1 at one end to be arranged through each switch room 41 in sequence, so as to realize re-supply of the re-supply panel 421 in each switch room 41. It is realized that when a switch room 41 of a certain column needs to be re-supplyed in the future, it is not necessary to draw power from the switch room of the adjacent column, and re-supply can be performed from the switch room of the certain column, thereby effectively reducing the length of the re-supply cable, and further reducing the difficulty of implementing re-supply. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A nuclear power unit repowering device, characterized in that: include: An upstream switchboard unit (1), the upstream switchboard unit (1) supplies power to two parallel maintenance switchboards (2); a re-supply branch line (3), a first end of the re-supply branch line (3) being electrically connected to the upstream switchboard unit (1), and The power distribution room unit (4), the second end of the repower supply branch line (3) passes through each column of the power distribution room unit (4) in sequence, and supplies power to each column of the power distribution room unit (4).

2. The nuclear power unit repowering device according to claim 1, characterized in that: The upstream switchboard unit (1) comprises: an upstream switchboard (11), a main distribution line (12), and a branch line (13); the upstream switchboard (11) is electrically connected to a first end of the main distribution line (12); the first ends of a plurality of branch lines (13) and the first end of the resupply branch line (3) are respectively electrically connected to a second end of the main distribution line (12); and the second end of the branch line (13) is electrically connected to the corresponding two rows of parallel maintenance switchboards (2).

3. The nuclear power unit repowering device according to claim 2, characterized in that: The upstream switchboard (11) is an LKZ switchboard.

4. The nuclear power unit repowering device according to claim 1, characterized in that: The power distribution room unit (4) comprises: Power distribution room (41); and A re-supply panel device (42), wherein the re-supply panel device (42) is arranged in the power distribution room (41), and the re-supply panel device (42) is electrically connected to the re-supply branch line (3).

5. The nuclear power unit repower supply device according to claim 4, characterized in that: The repowering disk device (42) comprises: Re-supplying the power panel (421); and A re-supply wiring (422), wherein a first end of the re-supply wiring (422) is electrically connected to the re-supply disk (421), and a second end of the re-supply wiring (422) is electrically connected to the re-supply branch line (3).

6. The nuclear power unit repower supply device according to claim 5, characterized in that: The repowering panel device (42) further comprises: an on-site repowering box (423); a plurality of the on-site repowering boxes (423) are electrically connected to the repowering panel (421) via power supply lines to repower the emergency equipment corresponding to the power distribution room (41).

7. The nuclear power unit repowering device according to claim 5, characterized in that: The power distribution room (41) is provided with a cable hole, and the repower supply wiring (422) passes through the cable hole to be electrically connected to the repower supply branch line (3).

8. The nuclear power unit repowering device according to claim 7, characterized in that: The repower supply wiring (422) and the repower supply branch line (3) are connected via embedded components.

9. The nuclear power unit repowering device according to claim 1, characterized in that: The plurality of power distribution room units (4) are arranged independently of each other.

10. A nuclear power unit maintenance system, characterized in that: It comprises the nuclear power unit repowering device as described in any one of claims 1-9.

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