Sectional-insulation single-point grounding operating method for OPGW optical cable
A segmented insulation and single-point grounding technology, which is applied in the direction of optical fiber/cable installation, fiber mechanical structure, etc., can solve problems such as energy loss of OPGW optical cable, achieve the effect of reducing induced current loss and huge economic benefits
Active Publication Date: 2011-07-20
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
Because of its communication function, the OPGW optical cable has been grounded tower by tower, so that a loop is formed between the OPGW optical cable and the ground, and there is a long-term energy loss in the OPGW optical cable.
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[0029] The operating method of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0030] The principle of the operating method of the present invention is as attached figure 1 As shown, the OPGW optical cable includes several coil length sections. In one coil length section of the OPGW, only one base tower 3 is directly connected and grounded to the OPGW optical cable 1 through a common pre-twisted wire clamp, that is, the grounding point a shown in the figure, The rest of the towers 3 are connected to the OPGW optical cable 1 through the suspension insulator 4 . In this way, only one point is grounded in a long section of the OPGW, and the rest of the points are all insulated from the ground, and the induced current generated by the wire on the OPGW optical cable 1 cannot form a loop, thereby avoiding the circulation loss.
[0031] In the above scheme, the two adjacent long sections of the disk should also be insu...
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The invention discloses a sectional-insulation single-point grounding operating method for an optical fiber composite overhead ground wire (OPGW) optical cable. In the method, the OPGW optical cable is divided into a plurality of long plate sections; a plurality of poles and towers are arranged in each long plate section of the OPGW optical cable; a basic pole and tower among the poles and towers is connected with the OPGW optical cable and is grounded through a pre-twisted wire clip; the remaining poles and towers are connected with the OPGW optical cable through suspension insulators; every two adjacent long plate sections are connected on a connection tower; two OPGW optical cables to be connected positioned on the two sides of the connection tower are respectively suspended on a ground wire cross arm of the connection tower through strain insulator strings; and the two OPGW optical cables are led to the cross section of the tower body of the connection tower through leading-down wire clips and are respectively connected into a connection box on the tower body of the connection tower for connecting. The method improves a conventional operating mode that an OPGW is grounded tower by tower on a transmission line, greatly reduces induced current loss, brings great economic benefits to an electric power system, and has a positive significance for constructing an energy-saving and environmentally-friendly transmission line.
Description
technical field [0001] The invention belongs to the field of high-voltage transmission lines, and in particular relates to an operation method for section-insulated single-point grounding of an OPGW optical cable. Background technique [0002] At present, most of my country's high-voltage and ultra-high-voltage transmission lines use OPGW (Optical Fiber Composite Overhead Ground Wire, full name "Optical Fiber Composite Overhead Ground Wire") and ordinary ground wires to protect transmission lines. Ordinary ground wires usually adopt the operation mode of segmented insulation single-point grounding single-point grounding single-point grounding. In order to protect its communication function, the optical fiber cannot be disconnected, so the operation mode of tower-by-tower grounding has always been used. This tower-by-tower grounding operation mode is realized through the interconnection of steel strands to ordinary towers. [0003] Under normal operating conditions, an elect...
Claims
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Login to View More IPC IPC(8): G02B6/48G02B6/44
Inventor 莫娟刘蕊段舒宁
Owner CHINA ELECTRIC POWER RES INST