Lightning stroke test source with composite fiber overhead earth wire

Abstract

The present invention relates to power system and communication technology, and adopts continuous current 'C' scheme. The circuit includes voltage regulating thyristor circuit, main transformer, voltage grade change over switch, diode rectifier circuit, LC filter circuit, sync power source, control circuit, current limiting change over switch, program setting unit, etc. It has voltage regulation comprising primary thyristor and secondary rectifier, lightning period controlled through blocking and unblocking, sync power source for isolating triphase power supply and step-down to form pulse in the control circuit, and delay protection in the AC side within 4 sec. The present invention has simple test scheme, simple circuit, relax requirement of ignition loop and low cost.

Description

technical field [0001] The invention relates to the technical field of electric power system communication, in particular to a lightning strike test source for special electric power optical fiber composite overhead ground wire (OPGW). Background technique [0002] Optical fiber composite overhead ground wire (OPGW) not only has various advantages of optical fiber communication, but also plays the role of ground wire in power transmission lines. Among power optical cables, optical fiber composite overhead ground wire (OPGW) is highly trusted by users for its advanced manufacturing technology and high reliability. [0003] The overhead ground wire installed on the upper part of the overhead transmission line can be used as a lightning conductor to protect the wire from lightning damage, so it is more susceptible to lightning strikes. Some strands of overhead ground wires struck by lightning may break, which requires improving the lightning resistance level of overhead ground...

AI Technical Summary

Problems solved by technology

This test scheme uses high voltage, large current, and long time, so the transformer and rectifier used as power supply are very expensive, which increases the cost of the test

[0026] Before 2003, due to the reason of the test equipment, the qualified OPGW lightning shock resistance simulation test could not be carried out in China. When domestic products need to do this test, usually the samples can only be sent to foreign countries, and the high test fee will be paid by foreign countries. Laboratory to complete the project test

[0027] After the newness search of electric power science and technology by the Guodian Information Center, the online retrieval of relevant databases and related websites at home and abroad, and the manual retrieval of the latest relevant periodicals in the collection of the Guodian Information Center, through comparison and analysis, it is concluded that the general implementation method abroad is to use High voltage shock source plus high voltage and high current, or high voltage shock source plus low voltage and high current, the OPGW lightning strike test source with the characteristics of the present invention has not been reported at home and abroad

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