Energy-saving running method suitable for OPGW (optical fiber composite overhead ground wire) cable of 220kV electric transmission line

A technology for transmission lines and operation methods, applied in the installation of optical fibers/cables, etc., can solve the problems of small resistance, power loss, and frequent broken strand faults in the outer layer of the optical cable, so as to achieve small power loss, reduce the probability of lightning strikes, The effect of reducing the difference in electrical performance of the system

Inactive Publication Date: 2014-08-06
陈彦焰 +15
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Problems solved by technology

[0003] 1. A closed loop is formed between the ground wire and the earth. Under the action of the induced electromotive force, an induced current will be generated on the ground wire, resulting in a certain power loss
[0004] 2. Due to the different operation modes of the OPGW optical ca

Method used

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  • Energy-saving running method suitable for OPGW (optical fiber composite overhead ground wire) cable of 220kV electric transmission line
  • Energy-saving running method suitable for OPGW (optical fiber composite overhead ground wire) cable of 220kV electric transmission line

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Embodiment Construction

[0013] refer to Figure 1-2 In the present invention, the OPGW optical cable 1 is insulated from the straight tower through the ground wire insulator in the unit of the disk, and the connection point of each disk is used as the grounding point 2 to be grounded, and the whole line of the OPGW optical cable 1 is kept continuous. Transpose the OPGW optical cable 1 and the ground wire 3 on the tower 4, and fix the OPGW optical cable 1 with the OPGW optical cable insulation down-lead clamp at the transposition, so that the OPGW optical cable 1 and the tower head are kept insulated. Line 3 is directly grounded.

[0014] The grounding point 2 of the OPGW optical cable 1 of the present invention is selected at the joint of the optical cable, and the transposition point between the OPGW optical cable 1 and the ground wire 3 should be selected on any tension tower 4 other than the joint of the optical cable, and the insulating type optical cable is used to lead down the clamp The OPGW ...

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Abstract

The invention provides an energy-saving running method suitable for an OPGW (optical fiber composite overhead ground wire) cable of a 220kV electric transmission line, and relates to the technical field of high-tension transmission lines. By using the scheme, the OPGW cable is insulated from a tangent tower through a ground wire insulator by using a plate as a unit; connection points of plates serve as grounding points during grounding; the whole OPGW cable runs through continuously; the position of the OPGW and the position of a ground wire are changed on an optional tension support between the two grounding points; the OPGW cable is fixed by using an OPGW cable insulating downlead at a position changing site, so that the OPGW cable is insulated from a support head; and ground wires are directly grounded at a short-circuit high-current section of an exit of a transformer substation. Because induced electromotive force is greatly reduced, only weak induced current exists, electric energy loss is small, difference between the system electric performance of the shunt ground wires and the system electric performance of the OPGW cable due to the grounding frequency is reduced, and the probability of lightning stroke on the OPGW cable is reduced to a certain degree, running conditions of the cable are improved, and the annular cost of the OPGW cable is minimum within the life cycle.

Description

Technical field: [0001] The invention relates to the technical field of high-voltage transmission lines, in particular to an energy-saving operation method for OPGW optical cables of 220kV transmission lines. Background technique: [0002] my country's 220kV transmission lines are all designed with double ground wires. When the transmission lines are in normal operation, the OPGW optical cables are all grounded tower by tower. In this case, there will be the following disadvantages: [0003] 1. A closed loop is formed between the ground wire and the earth. Under the action of the induced electromotive force, an induced current will be generated on the ground wire, resulting in a certain amount of power loss. [0004] 2. Due to the difference in the operation mode of the OPGW optical cable and the ordinary ground wire, the grounding resistance on the OPGW side is small. When a lightning strike occurs, the lightning current always chooses the OPGW side to enter the ground, res...

Claims

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Application Information

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IPC IPC(8): G02B6/48
Inventor 陈彦焰王力董江戎李卫国李涛陈曦鸣谢涛钟成元兰佳于永洋刘大平刘西民罗正帮张浩胡祖伟邹本为
Owner 陈彦焰
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