The Research On Lighting Protection Of 10kV Transmission Lines

10kV distribution line complexity of structure, wide distribution and low levels of insulation.Studies have shown that Lightning stroke trip rate occupies a fairly large Proportion of all trip rate on 10 k V distribution Lines.It Serious harm the sate of distribution network, reduce the reliability of power supply,it brings huge losses to industrial and agricultural production, and brings inconvenience to people’s daily lives. Therefore, the study of the 10 kV distribution line lightning protection measures to reduce the rate of lightning trip effectively, can greatly reduce the distribution line failures, and reduce the frequency of the power grid accident.This article Aim at lightning trip of 10 k V distribution line, research shows that the lightning induced voltage are the main cause of flashover on distribution line. The generation mechanism of lightning indueed voltages on distribution line is studied in this paper,it calculation the lightning indueed voltages,and analysis the ham of lightning induced voltage.Base on the 10 kV distribution line to the actual situation of ZhaoQing,this paper Analysis of its lightning protection measures.such as Enhanced distribution line insulation level to reduced the line insulation flashover probability, install lightning arrester, Commissioning of auto-reclosure, reduce the grounding resistance. Considering the actual situations of 10 kV distribution lines in ZhaoQing, According to the site investigation, we evaluation Zhaoqing 10 k V distribution network lines lightning disaster situation, Confirm the lightning blind, install a special lightning rod(No halo lightning rod) in the blind spot.It can improve the electromagnetic environment around the distribution line,can lead the lighting to an open space outside the line, can provide an effective channel for the lightning.reduce the lightning disaster to an acceptable level from the source, to achieve effective protection of distribution lines. Finally, according to the research, This paper studies "double ground network" lightning protection scheme of distribution transformer in Zhao Qing;points out its disadvantages,and analyze the advantages of "three point one land", Proposed that change the "double ground network" to "three point one" wiring mode.