WO2018110845A1 - Construction method for uninterruptible power distribution without bypass cable intermediate connection points using individually openable single-phase multi-branch switchgear for construction - Google Patents

Abstract

The present invention relates to a construction method for a uninterruptible power distribution for a bypass cable, and more particularly to a construction method for uninterruptible power distribution without a bypass cable intermediate connection point by using an individually openable single-phase multi-branch switchgear for construction, wherein the method allows the switchgear for construction to be directly connected to an uninterruptable transformer device and branch line without using an intermediate connection member and branch connection member of the bypass cable, thus allowing the omission of a switchgear for construction installed in a branch-line pole, by using an individually openable single-phase multi-branch switchgear for construction having a structure of a single phase input and three outputs to allow the switchgear for construction directly connected to the uninterruptable transformer device and branch line when operating each of the A phases of three extra-high voltage phases. The construction method can be easily applied in a complicated downtown area and improve the convenience and stability of operations, such as by preventing a voltage drop generated in a temporary connection point, by preventing traffic congestion, and danger to pedestrians passing through.

Description

Uninterruptible power distribution method without bypass cable intermediate connection points using individual switchgear single-phase multi-branch construction switch

The present invention relates to a bypass cable uninterruptible power distribution method, and more specifically, by using a bypass cable installed on the ground or pole during the replacement and relocation of the distribution lines connected to each pole and the change of the transition site. In case of uninterrupted work by sequential disconnection connection, it is solved the problem that site application is very limited in the place where there are many unstable connection points and excessive equipment input and the work area such as traffic obstacle or the city where there are many transformers. In the uninterruptible power distribution method without bypass cable intermediate connection point using individual switchable single-phase multi-branch construction switchgear that minimizes the equipment and eliminates the intermediate connection point of bypass cable and improves the voltage drop. It is about.

In response to the surge in electric power demand, electric power facilities have been expanded in response. As the demand for electric quality of electric power users increases, the momentary power failure is also subject to civil complaints. Increasingly, uninterrupted construction methods are being performed in which the construction is performed without disconnecting the power for high quality power supply during power distribution construction.

The conventional high voltage distribution line uses a temporary transmission method using a bypass cable, which is one of the uninterrupted electric methods, but it uses the intermediate connection material every 50m by using the high voltage three phase by using a construction switch and a three phase bypass cable. If there is a transformer in the work section, branch from the branch connection material at each installation point of the transformer and supply it to each uninterruptible transformer device.If there is a branch line, the branch line is supplied using the branch connection material to supply a branch line. Work has been done at about 200 ~ 300m, but there are many unstable temporary connection places such as voltage drop, and it takes a lot of work time according to the side work such as laying three-phase bypass cable on the ground temporarily and then dismantling it after completion. In order to compensate, the patent registration 10-1122499 is used as' wire wire mechanism and bypass cable Uninterrupted Power Distribution Act was registered.

The patent method is a conventional method of installing a special high-pressure three-phase bypass cable as shown in Figure 1, the installation of the temporary cable for the temporary transmission only 20 phase of the special high-pressure three-phase ground or column on the sequential The present invention relates to an uninterruptible power distribution method for replacing, relocating, and changing the transition of single-phase or extra-high voltage three-phase distribution lines by separate connection.

This is because the intermediate connecting member 910 and the construction switch 400 for connecting the bypass cable 20 which is 50 m in the working section are installed at both sides of the working section, and the branch connection member 920 is provided in the branch connecting member 920. Branching and installing breaker for construction (400) and supplying to branch line (60) branch line, there are many temporary connection points, which causes voltage drop by 3% per connection point, reducing the allowable capacity of bypass cable and reducing load capacity of distribution line. Work area is very limited,

In addition, transformers 30, 30 'and 30 "are installed at every electric pole in the work zone in the urban downtown area with many customers, so that the uninterruptible transformer unit 50 is expensive due to road traffic obstacles. There is a problem that can not be installed every time the application of the method is very limited.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Korean Patent Application No. 10-1122499.

The present invention has been made to solve the above problems, in the branching of the multi-circuit A phase of the high-pressure three-phase, using a single-stage single-stage multi-stage construction switchgear having a single-phase input and three output structure However, it is possible to open and close each branch at the time of output, so that it is possible to work up to three transformer lines with one uninterruptible transformer device in three transformer lines in the work section without removing the temporary connection point in the middle of the work section trunk. In addition, at the same time it is an object of the present invention to provide an uninterruptible power distribution method without a bypass cable intermediate connection point using individual switchgear single-phase multi-branch construction switchgear that can work even up to three branch lines.

As a specific means for achieving the above object, the individual open-ended single-phase multi-branch construction switchgear consisting of a multi-circuit output unit having each switch branched from one input unit to the start section and end pole of the work section in the high-voltage distribution line Respectively install the bypass process, uninterruptible work process, and demolition process,

If there is a branch line between the start and end pole of the work section of the distribution line,

Bypass process,

The terminal cable is placed on the input of the individual switchgear single-phase multi-branch construction switchgear and A high voltage distribution line A, and a bypass cable is installed on the ground to the switch of any one of the multi-circuit outputs of the two switchgear-type single-phase multi-branch construction switchgear. Each of them is branched from one switch to the other end of the individual switchgear for single-stage multi-stage construction switchgear, and is placed on the branch A.

Uninterruptible work process,

After separating the A-phase jumper wires on both sides of the distribution line work section and the branch line to secure the working section in the diagonal state, complete the work in the oblique state, and then connect the A-phase jumper wires of the completed distribution line bypass, respectively. After opening the individual switchgear single-phase multi-branch construction switchgear installed sequentially, disconnect the terminal cables connected to the distribution line of the start and end poles of the work section and the distribution lines of the branch line, and perform uninterrupted A phase work.

Dismantling process,

Remove the installed bypass cable, individual switchable single-phase multi-branch construction switchgear, and terminal cable.

When working with distribution lines of more than one phase,

It can be achieved by repeating the bypass process and the uninterruptible work process by separating and connecting the electricity of different phases sequentially using the individual switchgear single-phase multi-branch construction switchgear, terminal cable, and the installed bypass cable. It can be.

As described above, the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear according to the present invention is an individual switch-type single-phase multi-branch that can be selectively opened and closed at the time of outputting in the A phase of the special high pressure three phases. By using the construction switch, it eliminates the intermediate connection in the middle of the bypass section of the work section and installs the construction switch by connecting it to the uninterruptible transformer device and the branch line directly from the individual switching type single-phase multi-branch construction switch without using the bypass cable branch connection material. It is possible to reduce the location, miniaturize the construction switch, and simplify the work process.In particular, by eliminating the temporary connection point in the middle of the work section, it prevents the voltage drop generated at the temporary connection point and increases the allowable capacity of the bypass cable to increase the heavy load. It has the effect of expanding the working range with a furnace, When there are a large number of transformers in the business area, one transformer can supply three transformers, so it is easy to apply the construction method in the downtown downtown area, and it is convenient for operation and stability by preventing traffic obstacles and pedestrian traffic hazards. You can get an improved effect.

1 is a state diagram of an uninterruptible power distribution method using a conventional wire transfer mechanism and a bypass cable.

Figure 2 is a ground-phase construction state of the A-phase bypass cable with a branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual open-close single-phase multi-branch construction switchgear of the present invention.

Figure 3 is a ground-phase construction state of the B-phase bypass cable grounding construction with a branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual open-close single-phase multi-branch construction switchgear of the present invention.

Figure 4 is a ground-phase construction state of the C-phase bypass cable grounding construction with a branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual open-close single-phase multi-branch construction switchgear of the present invention.

Figure 5 is a simplified circuit diagram of the individual open and close single-phase multi-branch construction switchgear of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual open and close single-phase multi-branch construction switch.

Figure 6 is another embodiment of the bypass cable column laid construction state having a branching line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear.

Figure 7 is another embodiment of the bypass cable ground installation construction state having two branch poles in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear.

8 is a ground cable construction state of the bypass cable having a transformer line and a branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear of the present invention.

Figure 9 is another embodiment of the bypass cable ground laying construction state having a transformer line and a branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear.

Figure 10 is a ground cable installation state of the bypass cable having three transformer lines and one branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear of the present invention.

11 is another embodiment of the bypass cable pole laying construction state having three transformer lines and one branch line in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear according to the present invention .

12 is another embodiment of the bypass cable ground laying construction state having two transformer lines and two branch lines in the work section of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switch .

[Description of the code]

20: bypass cable 21, 21 ': terminal cable

22: uninterruptible transformer device connection cable

30, 30 ', 30 ": Transformer 31, 31', 31": Transformer secondary line

35, 35 ', 35 ": COS

40, 40 ': Individual switchgear single phase multi-branch construction switchgear

41 input unit 43 multi-circuit output unit

43a, 43a ', 43a ": switch 50: uninterruptible transformer device

60, 60 ': Quarterly 70: Neutral

80: low voltage wire 81: low voltage bypass cable

400: construction switchgear

910: intermediate connecting member 920: branch connecting member

The terms or words used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention, and do not represent all of the technical idea of the present invention, which can be replaced at the time of the present application It should be understood that there may be various equivalents and variations.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the uninterruptible power distribution method without the bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear.

Example 1

As shown in FIG. 2, when there is a branch column 60 between the start section and the end section of the work section of the distribution line,

First, perform the bypass process

Only the phase A (1) of the three phases of extra-high pressure separates the bypass cable (20) on the ground without an intermediate connection point, and opens and closes the single-stage multi-phase construction switchgear (40) separately on the standing poles (starting pole and ending pole) on both sides of the work section. After installing each of them bypass the A phase (1) by using the terminal cable (21), if there is a branch line (60) in the work zone, the individual open and close type single-phase multi-branch construction switchgear 40 installed in the standing column Branch of A phase (1) with a terminal cable (21 ') and the branch line (60), which is connected to the branch line A phase and then inspected, and the individual open-ended single-phase multi-branch switchgear 40 sequentially Connect by bypass.

Then, perform an uninterruptible work process,

By separating the jumper wires at the start and the end of the work section of the phase A (1) where the extra high pressure was bypassed, the entire phase A (1) in the working period was secured in a diagonal working condition. After completing the alteration or replacement of the main pole, the wire twisted line and the long wire work, and bypassing the jumper wire of the A phase (1), when the uninterrupted work is completed, the individual open / close single phase multi-branch construction switchgear 40 is opened sequentially, and the work is performed. A phase (1) uninterruptible work is completed by separating the standing column and the branch column 60 bypass cable 20 and the terminal cable 21 and 21 'at both ends of the section.

Thereafter, when the B phase (2) of the three phases work as shown in Figure 3 after connecting the terminal cable 21 of the already installed bypass cable (20) from the standing column on both sides of the work section to the B phase (2) In the work section, connect the branch line 60 terminal terminal cable 21 'to the branch line B phase (2) and inspect it, and then connect the individual switch-type single-phase multi-branch construction switch 40 sequentially and bypass it. .

Subsequently, the jumper wires at the start and end of the work section of the phase B of the B phase (2) where the extra high pressure was bypassed are separated, and the entire B phase (2) in the working section is moved to a safe working space in a diagonal state. After completing the alteration or replacement of the pole, wire stranding and long wire work, bypassing the jumper wire of the B phase (2), and after the uninterruptible work is completed, the individual open / close single phase multi-branch construction switchgear 40 is opened sequentially. In addition, by separating the standing column and branch column (60) bypass cable 20 and the terminal cable (21) (21 ') at both ends of the work section, the B phase (1) uninterrupted work is completed.

After the C phase (3) of the three phases work as shown in Fig. 4 by connecting the terminal cable 21 of the already installed bypass cable 20 from the standing column on both sides of the work section to the C phase (3) In the work section, connect the branch cable (60) winning terminal cable (21 ') to the branch line C phase (3), and then inspect it, and then connect the individual switchgear type single-phase multi-branch construction switch 40 in order to bypass the connection. .

Subsequently, the jumper wires at the start and end of the work section of the C phase (3) where the extra high pressure was bypassed were separated and the jumper wires of the C phase (3) in the work section were moved to a safe working space in a diagonal state. After completing the alteration or replacement of the pole, wire stranding and long wire work, bypassing the jumper wire of the C phase (3), and after the uninterruptible work is completed, the individual open / close single-phase multi-branch construction switchgear 40 is opened sequentially. In addition, by separating the standing column and branch column (60) bypass cable 20 and the terminal cable (21) (21 ') at both ends of the work section, the B phase (1) uninterrupted work is completed.

Then, the demolition process is performed,

Bypass cable 20 and the terminal cable 21, 21 'of the end of the work section of the bypass cable 20 to separate the terminal cable (21) (21') of the C phase (3) uninterrupted work is completed Individually open and close single-phase multi-branch construction switchgear 40 and the like can be safely removed and finish uninterrupted work.

On the other hand, each of the individual opening and closing type single-phase multi-branch construction switchgear 40, as shown in Figure 5 is formed on one side of the input unit 41 of one line, the other side of each switch 43a (43a ') individually The multi-circuit output section 43 branched into a plurality of lines to be operated is constituted.

Thus, for example, both sides of the phase A (1) is connected to the input unit 41 of the individually openable single-phase multi-branch construction switch 40, respectively, the bypass cable 20 is any of the secondary side multi-circuit output unit 43 It may be connected to one switch 43a, 43a ', 43a ".

In addition, the other switch 43a, 43a ', 43a "of the multi-circuit output part 43 of the other individual open / close single phase multi-branch construction switch 40 does not use an individual open / close single phase multi-branch construction switch. It is possible to connect to the branch column 60 using the cable 21 'or the uninterruptible transformer device 50 using the uninterruptible transformer device connecting cable 22 described below.

On the other hand, the selection of the phase for the connection of the multi-circuit output portion 43 of the individual open and close single-phase multi-branch construction switchgear 40 configured as described above is not limited, but can be connected through any one of three phases, each phase switch ( It will be appreciated that the configuration is made outputable by the operations 43a) 43a 'and 43a ".

Example 2

As shown in FIG. 6, when the bypass cable cannot be laid on the ground and laid on the column, and there is a branch column 60 in the work section,

First, the bypass process

If the bypass cable cannot be installed on the ground due to road crossings or road traffic obstacles in the work zone, only the A-phase (1) of the special high-pressure three phases separates the bypass cable (20) in the vicinity of the neutral wire (70) without intermediate connection points. After installing the individual switchgear single-phase multi-branch construction switchgear 40 in each winning column (starting pole and end pole) in the work section, and bypassing the A phase (1) using the terminal cable (21) In the case where there is a dividing line 60 in the work section, the special high pressure of the A phase 1 is branched to the terminal cable 21 'by the individual opening-and-closing single-phase multi-branch construction switchgear 40 installed in the winning line. ), Connect to the branch line A phase, and then check and connect bypass by inserting the individual switch-type single-phase multi-branch construction switch 40 in sequence.

Then, perform an uninterruptible work process,

By separating the jumper wires at the start and the end of the work section of the phase A (1) where the extra high pressure was bypassed, the entire phase A (1) in the working period was secured in a diagonal working condition. After completing the alteration or replacement of the main pole, the wire twisted line and the long wire work, and bypassing the jumper wire of the A phase (1), when the uninterrupted work is completed, the individual open / close single phase multi-branch construction switchgear 40 is opened sequentially, and the work is performed. A phase (1) uninterruptible work is completed by separating the standing column and the branch column 60 bypass cable 20 and the terminal cable 21 and 21 'at both ends of the section.

Thereafter, as described above, the B phase 2 and the C phase 3 of the three phases may be performed by repeatedly performing the removal process and the uninterruptible work process.

 Example 3

In the case where there are a plurality of branches 60 in the working section as shown in Figure 7, as shown in Figure 1 to Figures 2 to 7, as shown in Figure 1 to perform the special high pressure phase A to C phase, the individual installed in the column Open / closed single-phase multi-branch construction switchgear 40 branched the special high pressure of phase A (1) to terminal cable (21 '), and each terminal cable (21') on each branch line (60) is connected to the branch line. In the process, the PIPASS process, the uninterruptible work process, and the demolition process can be performed.

Example 4

Referring to FIG. 5, when there is a transformer column and a branch column 60 between the start and end poles of the work section of the distribution line, as shown in FIG. 8,

First, perform the bypass process

Only the phase A (1) of the three phases of extra-high pressure separates the bypass cable (20) on the ground without an intermediate connection point, and opens and closes the single-stage multi-phase construction switchgear (40) separately on the standing poles (starting pole and ending pole) on both sides of the work section. By connecting each of the phase A (1) by using the terminal cable (21), if there is a transformer (30) in the work zone, the individual open-type single-phase multi-branch construction switchgear 40 in the uninterruptible transformer device connection cable Branch to (22) to branch off the special high voltage of phase A (1) and connect to the uninterruptible transformer device (50) .The secondary low voltage of the uninterruptible transformer device (50) is connected to the low voltage distribution line (A phase) by the low voltage bypass cable (81). Branch line (60) work is connected to the branch line (60) distribution line by branching to the terminal cable (21 ') from the individual opening-and-closing single-phase multi-branch construction switchgear (40) closest to the site conditions on site conditions Opening and closing single phase multi-branch construction switchgear 40 When the mouth is connected to the bypass.

Then, perform an uninterruptible work process,

Remove the transformer secondary lowering line 31 of the transformer 30 from the transformer column, open the transformer COS 35, and separate the jumper wires of the starting and ending poles and the branch poles 60 in the work section. (1) Secure the entire work area in a diagonal state to complete the alteration or replacement of conductors, wire stranding, and long wire work, and connect the jumper wires of phase A (1) to bypass the newly established wire A phase (1) transformer The COS (35) of (30) is inputted to connect the transformer secondary lowering line to the low voltage line (80), separate the low pressure bypass cable (81) on the low voltage line (80), and open and close the single-stage single-phase multi-branch construction switchgear (40). A) (1) uninterrupted work is completed by sequentially opening) and separating the standing column and the branch column (60) terminal cable (21 ') of both ends of the work section of the bypass cable (20).

In addition, as shown in FIG. 9, the terminal cable 21 ′ connected to the branch column 60 may branch from the uninterruptible transformer device 50 and be prized as the branch column 60. It is to do the uninterrupted work by connecting the terminal cable 21 'of the branch column 60 by branching at the convenient and safe side of the standing column individual open / close single-phase multi-branch construction switchgear 40 or the uninterruptible transformer device 50.

Thereafter, phase B (2) and phase C (3) of the three phases are already installed at the time of work bypass cable (20), individual switchgear single-phase multi-branch construction switchgear 40, and terminal cable (21) (21 ') and By using the uninterruptible transformer device 50, the connecting cable 22, and the low voltage bypass cable 81, the bypass process and the uninterruptible work process are repeatedly performed and the uninterruptible work is completed. , The step of dismantling the individual switchgear single-phase multi-branch construction switchgear 40, the terminal cable (21) (21 '), the uninterruptible transformer device (50), the connecting cable (22), the low voltage bypass cable (81) Just do

Example 5

As shown in Fig. 10, when there are three transformer lines and one branch line in the work section,

As shown in FIG. 10, first, a bypass process is performed.

Phase A of the special high pressure three phases Bypass cable (20) is installed on the ground without intermediate connection points, and the individual opening and closing type single phase multi-branch construction switchgear (40) is installed on the winning end of the work section. After the bypass connection, if there are three transformers 30, 30 ', 30 "in the work section, the A-phase (1) of the individual open / close single-phase multi-branch construction switchgear 40 installed at the winning end of the work section is installed. Branch the extra high pressure to install the individual open / close type single phase multi-branch construction switchgear 40 'in front of the uninterruptible transformer device 50, and branch the branched A phase (1) into 3 extra high voltage lines and connect it to the uninterruptible transformer device 50. Secondary connection of the uninterruptible transformer device 50 so that the three single-phase transformers of the uninterruptible transformer device 50 can be operated separately, and using the low voltage bypass cable 81, the transformers 30, 30 'and 30 " The low voltage wires 80, 80 'and 80' 'of A phase, respectively, and the branch column 60 is connected to both ends of the work section. Although the individual high-voltage single-phase multi-branch construction switchgear 40 or the uninterruptible transformer device 50 installed in the branch can be branched from the high-voltage A phase, but FIG. 10 is branched from the uninterruptible transformer device 50 to the terminal cable (60). 21 ') is connected to the A-phase branch line, and after inspection, the individual switchgear single-phase multi-branch construction switchgear 40 is sequentially input.

Then, perform an uninterruptible work process,

When the temporary transmission is completed, disconnect the transformer secondary lowering lines 31, 31 ', 31 "of the A-phase transformers 30, 30', 30", and A-phase transformers 30, 30 ', 30 ". After opening the COS (35) (35 ') (35 ") of"), remove the jumper wires of the standing column and the branch column (60) at both ends of the work section, and secure the whole work section A phase (1) in a diagonal state. After securing the space and completing the alteration or replacement of the pole in the working section in the diagonal state and the wire stranding and the long wire work, and by-passing the jumper wire of the A phase (1), the newly established or replacement wire A phase transformer (30) (30 COS 35, 35 ', 35 "of "' 30 " are introduced, and the transformer secondary down line of transformer transformer 30, 30 ', 30 " (80 '') and then disconnect the low voltage bypass cable (81) from the low voltage line (80) (80 ') (80' '), and open and close single-phase multi-branch construction switchgear 40 (40') separately Open and separate the bypass cable 20 and the terminal cable 21 and 21 'of the winning column and the branch column 60 at both ends of the work section. Phase A (1) Uninterrupted work is completed.

Afterwards, phase B (2) and phase C (3) of the three phases are already installed at the time of work, the individual switchgear single-phase multi-branch construction switchgear 40 (40 '), and the terminal cable (21) ( 21 '), the uninterruptible transformer device 50, the connecting cable 22, and the low voltage bypass cable 81 are used to repeat the bypass process and the uninterruptible work process and the uninterrupted work is completed. 20, individual switchgear single phase multi-branch construction switchgear 40, 40 ', terminal cable 21, 21', uninterruptible transformer device 50, connecting cable 22, low voltage bypass What is necessary is just to perform the process of demolishing the cable 81.

Example 6

As shown in FIG. 11, when there are three transformer lines and one branch line in the working section, and the bypass cable 20 is not installed on the ground, the case is laid on the column.

If it is impossible to lay the bypass cable 20 on the ground due to road crossing, river crossing, or road traffic obstacles, the bypass cable 20 may be located near the neutral line 70 or the low voltage line 80 without an intermediate connection point. It is installed on the columnar, and the individual opening and closing single-phase multi-branch construction switchgear 40 is also installed on the column, both ends of the work section, and the uninterruptible work in the same manner as described in FIG.

Example 7

As shown in FIG. 12, when there are two transformer lines and two branch lines in a work section

As shown in Fig. 12, only the A-phase bypass cable 20 of the three phases of the high pressure is installed on the ground without an intermediate connection point, and the individual opening and closing type single phase multi-branch construction switchgear 40 is installed on both sides of the work section. If there are two transformers 30 and 30 'in the work section after bypassing the A phase (1), the A phase (1) in the individual open / close single phase multi-branch construction switchgear 40 installed at the winning end of the work section. Branch of A phase is divided into special high voltage two lines and connected to the uninterruptible transformer device (50) by installing an individual switchable single-phase multi-branch construction switchgear (40 ') in front of the uninterruptible transformer device (50). Secondary connection of the uninterruptible transformer device 50 so that two internal single-phase transformers can be operated separately, and the low voltage line 80 of the transformer 30, 30 'using the low voltage bypass cable 81. Each of the (80 ') A phases,

Branch lines 60 and 60 'can branch off the special high-pressure A phase from the individual open / close single phase multi-branch construction switchgear 40 or the uninterruptible transformer device 50 installed at both ends of the work section, but FIG. By bypassing the terminal cable (21 ') to the branch line (60) (60') A phase branch line, and after inspection, the bypass process of inputting the individual open-ended single-phase multi-branch construction switch 40 in sequence To perform.

Thereafter, the transformer secondary lowering lines 31 and 31 'of the A-phase transformer 30 and 30' are separated, and the work section is opened after opening the COS 35 and 35 'of the transformer 30 and 30'. By separating the jumper wires of the standing column and the branch column (60) (60 ') at both ends, securing the entire work zone A phase (1) as a safe working space in a diagonal state. And after completing the long-wire work and the work is completed by bypassing the jumper wire of the phase A (1), the new or replacement wire A phase transformer (30) (30 ') COS (35) (35') After connecting the transformer secondary lowering line (31) (31 ') to the low voltage line (80) (80'), disconnect the low voltage bypass cable (81) from the low voltage line (80) (80 '), and open / close single-phase multi-branch construction. Opening the switchgear 40 and 40 'sequentially, and separating the standing column and branch column 60 and 60' bypass cables 20 and the terminal cable 21 and 21 'at both ends of the work section. (1) Complete the uninterrupted work process.

Afterwards, phase B (2) and phase C (3) of the three phases are already installed at the time of work, the individual switchgear single-phase multi-branch construction switchgear 40 (40 '), and the terminal cable (21) ( 21 '), the uninterruptible transformer device 50, the connecting cable 22, and the low voltage bypass cable 81 are used to repeat the bypass process and the uninterruptible work process and the uninterrupted work is completed. 20, individual switchgear single phase multi-branch construction switchgear 40, 40 ', terminal cable 21, 21', uninterruptible transformer device 50, connecting cable 22, low voltage bypass What is necessary is just to perform the process of demolishing the cable 81.

Claims (4)

It consists of a multi-circuit output section 43 having respective switches 43a, 43a ', 43a "branched from one input section 41 to three at each start and end section of the high-voltage distribution line. Individually open and close single-phase multi-branch construction switchgear 40 is installed to perform the bypass process, uninterruptible work process, and demolition process, If there is a branch column 60 between the start pole and the end pole of the work section of the distribution line, Bypass process, The terminal cable 21 is placed on the input 41 of the individual open / close single phase multi-branch construction switchgear 40 and the A high voltage distribution line A phase (1), and the bypass cable 20 is laid on the ground to separately open / close single phase on both sides. It is connected to one of the switches 43a, 43a 'and 43a "of the multi-circuit output section 43 of the multi-branch construction switch 40, respectively, the other of the individual open-ended single-phase multi-branch construction switch 40 Branching from the switch 43a, 43a 'and 43a "to the terminal cable 21' and standing on the branch line 60 A, and bypassing the individual switch-type single-phase multi-branch construction switch 40 in turn Connect, Uninterruptible work process, After disconnecting the A-phase jumper wires on both sides of the distribution line and the branch line to secure the working line in the diagonal state, and completing the uninterrupted work in the diagonal state, the bypass of the completed distribution line A phase (1) jumper line is bypassed. After connecting and opening the installed individually open and close single-phase multi-branch construction switchgear 40 in sequence, the terminal cable (21) (21 ') connected to the distribution line of the start and end pole of the work section and the distribution line of the branch line (60). ) To separate phase A (1) uninterrupted work, Dismantling process, Dismantle the installed bypass cable 20, individual open / close single phase multi-branch construction switchgear 40, and terminal cables 21, 21 ', When working with distribution lines of more than one phase, When the phase A (1) work, the individual switchgear type single-phase multi-branch construction switchgear 40, the terminal cable (21) (21 ') and the installed bypass cable (20) are used to sequentially The uninterruptible power distribution method without the intermediate connection point of the bypass cable using the individual switchgear single-phase multi-branch construction switchgear, which is performed by repeatedly connecting the bypass process and the uninterruptible work process. The method of claim 1, If there is a transformer pole and branch pole 60 between the start pole and the end pole of the work section of the distribution line, Bypass process, The terminal cable 21 is placed on the input 41 of the individual open / close single phase multi-branch construction switchgear 40 and the A high voltage distribution line A phase (1), and the bypass cable 20 is laid on the ground to separately open / close single phase on both sides. It is connected to any one of the switches 43a, 43a 'and 43a "of the multi-branch construction switch 40, and the work section transformer main work is a switch 43a of the individually openable single-phase multi-branch construction switch 40 ( 43a ') (43a ") branched from the uninterruptible transformer device connecting cable 22 to the uninterruptible transformer device 50, and the secondary low voltage of the uninterruptible transformer device 50 to the low voltage bypass cable 81. It connects to the low-voltage distribution line A phase, and the branch column 60 work is branched by the terminal cable 21 'and won as the branch column 60, and the individual switch-type single-phase multi-branch construction switch 40 is sequentially supplied. Connect pass, Uninterruptible work process, Disconnect the transformer secondary lowering line 31 of the transformer 30 from the transformer column, open the transformer COS 35, and separate the jumper wires of the starting and ending poles and the branch poles 60 in the work section. After the uninterrupted work is completed in the diagonal state, the jumper wire of phase A (1) of the completed distribution line is bypassed, and the transformer COS (35) is put into the high voltage distribution line where the work is completed, and the transformer of the transformer After opening the single-phase multi-branch construction switchgear 40 in a state in which the secondary lowering line 31 is connected to the low voltage line 80, the distribution line of the start and end poles of the work section and the distribution line of the branch pole 60. Disconnect the terminal cable (21) (21 ') connected to the low voltage bypass cable 81 connected to the secondary of the uninterruptible transformer device (50) from the low-voltage distribution line to perform the uninterrupted work of phase A (1) , Dismantling process, The installed bypass cable 20, the individual switchgear type single-phase multi-branch construction switchgear 40, the terminal cables 21 and 21 ', the uninterruptible transformer 50, the connecting cable 22 and the low voltage Remove the pedestal cable (81), When working with distribution lines of more than one phase, In the case of the A phase (1) operation, the individual switchgear type single phase multi-branch construction switchgear 40, the terminal cables 21 and 21 ', the installed bypass cable 20, the uninterruptible transformer device 50, By using the connection cable 22 and the low-voltage bypass cable 81 to separate the sequential electricity of the other phase and repeat the bypass process and the uninterruptible work process, In the bypass process, The branch stock 60 operation is branched to the terminal cable 21 'from another one of the switches 43a, 43a', 43a "of the individual open / close single-phase multi-branch construction switch 40 to the branch 60. An uninterruptible power distribution method without an intermediate connection point of a bypass cable using individual switchgear type single-phase multi-branch construction switchgear. The method of claim 2, In the bypass process, Branch cable 60 operation is a bypass cable intermediate connection point using the individual switchgear single-phase multi-branch construction switchgear, characterized in that branching from the uninterruptible transformer device 50 to the terminal cable (21 ') and prized as a branch cable (60). Uninterruptible power distribution method. The method according to claim 1 or 2, In the bypass process, In case of difficult work of laying the bypass cable 20 on the ground due to road traffic obstacle and pedestrian danger, Uninterruptible power distribution method without bypass cable intermediate connection points using individual open / close single-phase multi-branch construction switchgear (40) and bypass cable (20) to complete uninterrupted work.

Images