CN220324923U - System for implementing load transfer by using spare cable - Google Patents
System for implementing load transfer by using spare cable Download PDFInfo
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- CN220324923U CN220324923U CN202321642494.4U CN202321642494U CN220324923U CN 220324923 U CN220324923 U CN 220324923U CN 202321642494 U CN202321642494 U CN 202321642494U CN 220324923 U CN220324923 U CN 220324923U
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- 238000012546 transfer Methods 0.000 title claims abstract description 47
- 239000012212 insulator Substances 0.000 claims abstract description 18
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 7
- 230000003449 preventive effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a system for implementing load transfer by using a standby cable, which is characterized in that: the system comprises a power cable, an indoor cable terminal, an outdoor cable terminal, a cable lead, an insulator, a wiring terminal, an insulating jumper wire and an overhead wire; the indoor cable terminal of cubical switchboard connection, indoor cable terminal is connected to outdoor cable terminal through power cable, and outdoor cable terminal connects on outdoor circuit shaft tower's overhead line through the cable lead wire, reaches user side high voltage cabinet of intaking through the user cable. The utility model can conveniently and rapidly transfer the power load under the conditions of lowest cost and shortest construction time, thereby being capable of rapidly implementing the upgrading and reconstruction work of the switch cabinet and simultaneously ensuring the safe operation of electric equipment.
Description
Technical Field
The utility model relates to the field of power transportation, in particular to a system for implementing load transfer by using a standby cable.
Background
The utility model relates to a method for transferring load by utilizing a dead II feeder cabinet and a spare cable thereof, and simultaneously utilizing the advantage of the same-pole erection of a II line and a I line to transfer load at an empty line of a 1# tower of a feed line by utilizing the original spare cable of the II line and the I line lap joint method.
Disclosure of Invention
The utility model aims to: the utility model aims to provide the electric load transfer device which can conveniently and rapidly transfer the electric load under the conditions of lowest cost and shortest construction time, so that the upgrading and reconstruction work of the switch cabinet can be rapidly implemented, and meanwhile, the safe operation of electric equipment is ensured.
The technical scheme is as follows: a system for performing load transfer using a backup cable, the system comprising a power cable, an indoor cable termination, an outdoor cable termination and cable lead, an insulator, a terminal block, an insulated jumper wire, and an overhead wire;
the indoor cable terminal of cubical switchboard connection, indoor cable terminal is connected to outdoor cable terminal through power cable, and outdoor cable terminal connects on outdoor circuit shaft tower's overhead line through the cable lead wire, reaches user side high voltage cabinet of intaking through the user cable.
Further, one end of the power cable is connected to the lower end of the high-voltage switch cabinet, the other end of the power cable is connected to an overhead line of the outdoor line tower, and power of the high-voltage switch cabinet is sent to the overhead line of the outdoor line tower through the power cable until the power is sent to a user side.
Further, the indoor cable terminal is connected to the lower end of the high-voltage switch cabinet and is a wire outlet end of the feeder cabinet. The indoor cable terminal, the outdoor cable terminal and the lead wires are terminals at two ends of the power cable, the indoor cable terminal is connected in the high-voltage switch cabinet and is connected to the overhead line through the power cable, the outdoor cable terminal and the lead wires;
further, the insulator is an insulating support column used for connecting wires on the line tower, the bottom end of the insulator is fixed on the tower cross arm and plays a role of insulating and supporting wires, and the upper end of the insulator is a terminal used for connecting the overhead wire and the cable lead.
Further, the wiring terminal is a fixed point for connecting the upper end of the insulator with the overhead wire, and is used for butting the overhead wire with the cable lead and fixing the wire and the cable lead of the overhead wire.
Furthermore, the insulating jumper is a connecting wire connected with two overhead lines of the power transmission line on the tower, and is used for temporary connection during load transfer. The I-type line and the II-type line are two lines erected on the same rod, the load transfer of the I-type line is to transfer the II-type cabinet and the withdrawn spare cable by using an insulating jumper wire, and then the name of the II-type cabinet is changed into the name of the I-type cabinet.
Further, the system is utilized to transfer the line load of the I-type switch cabinet, and the I-type switch cabinet is stopped; the method comprises the steps of checking and confirming a cable which is withdrawn from a primary cable trench of a transformer substation before a power failure of a second section bus of the transformer substation, distinguishing whether a spare cable of a II line is damaged, judging and confirming the withdrawn primary cable of the II line, then conducting a preventive electrical test of the power cable, conducting power failure on an I line after the cable test is qualified, conducting load transfer work, disconnecting and fixing a cable head of the I line and an overhead line at a 1# tower of the line which is erected with the I line and the II line, keeping a safe distance, then adopting an insulated wire as a jumper wire to overlap the outdoor cable head of the II line with the overhead line of the I line of the same rod, and recovering the load of the I line by the power supply of the II line to a two-way operation mode of a user.
Further, the primary cable up-flow method is used for preventing misjudgment of the spare cable.
The beneficial effects are that: the implementation effect of the utility model is as follows: the load of the I feeder line is transferred to the II line to supply power, so that the I feeder line user is not influenced by power failure installation and debugging during upgrading transformation of the switch cabinet, and the single loop or important load line operates normally. The practical value of the utility model: and the power utilization of single power supply users and important loads is facilitated. The operation safety of the user equipment is ensured. The method provides favorable conditions for the transformation of the high-voltage switch cabinet, has a certain practical value, and solves the problems of difficult load transfer and the like of project transformation. The method for implementing load transfer by using the standby cable has the advantages of simple structure, convenient wiring, economy and practicability.
The utility model has the advantages that: the main difficulty coefficient and the complexity of the utility model are how to transfer the power load by adopting a method without adding extra cost, so as to reduce the line power supply risk. The utility model uses the advantage of standby cable, uses insulated wire to connect and transfer load on the tower line, which can be popularized to the load transfer work of other same-pole erection project reconstruction, to ensure the operation safety of user equipment.
Drawings
FIG. 1 is a diagram of an embodiment of the present utility model;
fig. 2 is a circuit diagram of the operation of the power supply system of the present utility model.
Detailed Description
The technical scheme of the utility model is further described in detail below with reference to the examples and the attached drawings.
The utility model discloses a load transfer system implemented by using a standby cable, which comprises the following steps: 1. the cable comprises a power cable, an indoor cable terminal, an outdoor cable terminal, a lead, an insulator, a wiring terminal, an insulating jumper wire and an overhead wire.
One end of the power cable is connected to the lower end of the high-voltage switch cabinet, and the other end of the power cable is connected to an overhead line of the outdoor line tower, so that the power of the high-voltage switch cabinet is sent to the overhead line of the outdoor line tower through the power cable until the power is sent to a user side; providing reliable power supply for users.
The cable terminal is divided into an indoor terminal and an outdoor terminal, the indoor cable terminal is connected to the lower end of the high-voltage switch cabinet and is an outgoing line end of the feeder cabinet, the outdoor cable terminal is connected to an overhead line of an outdoor line pole tower through a cable lead, namely, the 10kV high-voltage switch cabinet, the indoor cable terminal, the power cable, the outdoor cable terminal, the lead, the overhead line, the user cable, the user side high-voltage incoming line cabinet, and the power cable is intermediate equipment connected to the high-voltage switch cabinet and the overhead line.
The insulator is an insulating support column used for connecting wires on the line tower, the bottom end of the insulator is fixed on the tower cross arm to play a role of insulating and supporting wires, and the upper end of the insulator is a terminal used for connecting the overhead wire and the cable lead.
The wiring terminal of the insulator is a fixed point for connecting the upper end of the insulator with the overhead wire, and is used for butting the overhead wire with the cable lead and fixing the wire and the cable lead of the overhead wire.
The insulated jumper wire is used for temporary wiring in load transfer, and is a main innovation point of the utility model, and is a connecting wire connected with a cable lead on a line tower and an overhead line of a power transmission line by utilizing the advantage of the same-pole erection of two lines.
The overhead line is a power line which is transmitted in a long distance, as shown in fig. 1, and the terminal of the overhead line and the lead wire of the power cable are connected to the binding post of the insulator on the tower; the other end of the overhead line is connected to the user side. If the 10kV second section is required to be transformed and replaced with the I-type feeder cabinet for load transfer, the two sides of the feeder power cable of the I-type high-voltage switch cabinet are withdrawn from a power supply system in a protective way, see fig. 1, the circuit is recovered after the switch cabinet is transformed conveniently, the withdrawn cable is fixed with safety measures and kept at a sufficient safety distance, then an insulated wire which is prepared in advance is used as a jumper wire, an overhead wire of the I-type circuit which is required to be load transferred is bridged to a spare cable of the II-type circuit by the insulated jumper wire to run, namely the load of the I-type circuit which is required to be transferred is connected to the spare cable of the II-type circuit in parallel to run, namely the load on the 10kV second section is transferred to a 10kV first section bus to run.
And upgrading and reforming a high-voltage switch cabinet of a certain transformer substation. The construction of the 10kV first-stage and second-stage switch cabinets can be carried out in a sectional and staged mode, and before replacement, load transfer is carried out on a single-loop power supply or important load circuit, as shown in fig. 2, the 10kV first-stage switch cabinet is transformed, and cables of the single-loop power supply or important load switch cabinet can be drawn back to the 10kV second-stage corresponding switch cabinet to be temporarily connected in parallel for operation; when the 10kV two-section switch cabinet is transformed, the switch cabinet needing load transfer is high in cost, time and labor are wasted because the outgoing cable is not long enough, the original method needs to temporarily lay a cable of more than ten meters and butt joint with the cable needing load transfer, and an intermediate joint and a terminal head are manufactured between the two cables to realize load transfer.
The utility model uses the favorable condition that the I line and the II line are two lines erected on the same pole, uses the standby cable withdrawn from the II line to transfer the load, and adopts a technical means to judge the primary cable by a power cable fault searching method when searching the cable; after the cable is found out, a preventive test is carried out on the cable, the load transfer can be carried out on the cable after the qualification of the cable is confirmed, and then the load of a butt joint I-shaped line is carried out on a line tower by adopting a jumper wire method. The specific implementation process is that firstly, the load of the I-type cabinet line is transferred, the I-type switch cabinet is stopped, and the load transfer can influence the power supply operation mode of a user. The double-loop power supply is changed into single-loop power supply, so as to reduce the risk caused by a user operation mode, reduce the construction time of load transfer, carefully check and confirm the withdrawn cable in the primary cable trench of the transformer substation before the power failure of the second-section bus of the transformer substation, distinguish whether the spare cable of the No. II line is damaged, in order to avoid the personal and equipment safety problems, a novel method is adopted for preventing misjudgment of the spare cable, a primary cable current rising method is adopted, the primary cable withdrawn from the No. II line is judged and confirmed, then a power cable preventive electric test is carried out, the power failure of the No. I line is carried out after the cable test is qualified, the load transfer work is carried out on the No. I line, the cable head of the No. I line and the overhead line are detached and fixed at the position of the No. 1 pole tower of the line which is erected with the No. II line, the safety distance is kept enough, the line is recovered after the switch cabinet is conveniently reconstructed, then the outdoor cable head of the No. II line is lapped with the overhead line of the same pole I line by adopting an insulated wire as a jumper, the load of the No. II line is recovered by the No. line, and the user operation mode is ensured. The method for implementing load transfer by using the standby cable has the advantages of simple structure, convenient wiring, economy and practicability.
In summary, the standby cable is used for carrying out load transfer, the advantage of the same-pole erection is adopted, the problem of load transfer of upgrading and reconstruction of the switch cabinet is solved, and a load transfer wiring loop is perfected, so that the cost in the aspects of load transfer construction, materials and the like of a 10kV two-section original method is solved, meanwhile, the construction cost of the reconstruction of the switch cabinet is reduced, and the advantage is provided for safe and reliable operation of a power supply system.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (8)
1. A system for performing load transfer using a backup cable, characterized by: the system comprises a power cable, an indoor cable terminal, an outdoor cable terminal, a cable lead, an insulator, a wiring terminal, an insulating jumper wire and an overhead wire;
the indoor cable terminal of cubical switchboard connection, indoor cable terminal is connected to outdoor cable terminal through power cable, and outdoor cable terminal connects on outdoor circuit shaft tower's overhead line through the cable lead wire, reaches user side high voltage cabinet of intaking through the user cable.
2. A system for performing load transfer using a backup cable according to claim 1, wherein: one end of the power cable is connected to the lower end of the high-voltage switch cabinet, the other end of the power cable is connected to an overhead line of the outdoor line tower, and the power of the high-voltage switch cabinet is sent to the overhead line of the outdoor line tower through the power cable until the power is sent to a user side.
3. A system for performing load transfer using a backup cable according to claim 1, wherein: the indoor cable terminal is connected to the lower end of the high-voltage switch cabinet and is an outlet terminal of the feeder cabinet.
4. A system for performing load transfer using a backup cable according to claim 1, wherein: the insulator is an insulating support column used for connecting wires on the line tower, the bottom end of the insulator is fixed on the tower cross arm to play a role of insulating and supporting wires, and the upper end of the insulator is a terminal used for connecting an overhead wire and a cable lead.
5. A system for performing load transfer using a backup cable according to claim 1, wherein: the wiring terminal is a fixed point for connecting the upper end of the insulator with the overhead wire and is used for butting the overhead wire with the cable lead and fixing the wire and the cable lead of the overhead wire.
6. A system for performing load transfer using a backup cable according to claim 1, wherein: the insulated jumper is a connecting wire connected with two overhead lines of the power transmission line on the tower and is used for temporary wiring in load transfer.
7. A system for performing load transfer using a backup cable according to claim 1, wherein: the system is utilized to transfer the line load of the I-type switch cabinet, and the I-type switch cabinet is stopped; the method comprises the steps of checking and confirming a cable which is withdrawn from a primary cable trench of a transformer substation before a power failure of a second section bus of the transformer substation, distinguishing whether a spare cable of a II line is damaged, judging and confirming the withdrawn primary cable of the II line, then conducting a preventive electrical test of the power cable, conducting power failure on an I line after the cable test is qualified, conducting load transfer work, disconnecting and fixing a cable head of the I line and an overhead line at a 1# tower of the line which is erected with the I line and the II line, keeping a safe distance, then adopting an insulated wire as a jumper wire to overlap the outdoor cable head of the II line with the overhead line of the I line of the same rod, and recovering the load of the I line by the power supply of the II line to a two-way operation mode of a user.
8. A system for performing load transfer using a backup cable according to claim 7, wherein: the primary cable up-flow method is used for preventing misjudgment of the spare cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321642494.4U CN220324923U (en) | 2023-06-27 | 2023-06-27 | System for implementing load transfer by using spare cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321642494.4U CN220324923U (en) | 2023-06-27 | 2023-06-27 | System for implementing load transfer by using spare cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220324923U true CN220324923U (en) | 2024-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321642494.4U Active CN220324923U (en) | 2023-06-27 | 2023-06-27 | System for implementing load transfer by using spare cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220324923U (en) |
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2023
- 2023-06-27 CN CN202321642494.4U patent/CN220324923U/en active Active
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