Single-phase installation structure of parallel gap of 10kV distribution line and test method thereof

A technology for distribution lines and installation structures, applied in the direction of testing dielectric strength, measuring electricity, measuring devices, etc., can solve the problems of two-phase or three-phase short circuit of lines, high lightning strike trip rate of distribution lines, and achieve induction lightning trip rate. The effect of reducing and reducing the induction lightning trip rate, induction lightning resistance and counterattack lightning resistance level improvement
CN110445082AActive Publication Date: 2019-11-12CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2019-11-12

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Abstract

The invention discloses a single-phase installation structure of a parallel gap of a 10kV distribution line and a test method thereof. The structure comprises: in a 10kV distribution line, the parallel gap is only installed in one phase of the return line of the same base pole tower, the two parallel gaps of the left and right adjacent base pole towers are installed in the other two phases among the three phases respectively, and every three adjacent base pole towers are provided with a group of three parallel gaps. The method comprises simulating a single-phase installation structure in whichthe parallel gap is installed in a 10kV distribution line in simulation software, and obtaining an inductive lightning strike trip-out rate and a direct lightning strike counterattack trip-out rate of the 10kV distribution line of the single-phase installation structure of the parallel gap under an inductive lightning strike and a direct lightning strike. The single-phase installation structure can further improve the lightning withstand level of the 10kV distribution line, reduces its inductive lightning strike trip-out rate and improves the operational reliability of a distribution networkon the basis of protecting distribution equipment such as insulators.
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Description

technical field

[0001] The invention relates to the field of lightning protection of 10kV power distribution lines, in particular to a single-phase installation structure of parallel gaps of 10kV power distribution lines and a testing method thereof. Background technique

[0002] The network structure of the 10kV distribution network is complex, there are few lightning protection measures, the level of lightning resistance is low, and the lightning strike failure rate of the distribution network under lightning overvoltage is high. Effective measures need to be taken to reduce the lightning strike failure rate and lightning damage loss of the distribution network. In the 10kV distribution line, the lightning protection measures include installing line arresters and using insulators with parallel gaps. Installing parallel gaps in 10kV distribution network is an economical and effective lightning protection measure. The gap discharge voltage is lower than the flashover voltage...

Claims

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