Analysis And Application Of Lightning Protection Technical Measures To Overhead Transmission Line In Zibo Area

Zibo power grid is to realize the power grid power to east, north and south to contact one of the important hub, its running situation of power grid security and stability in Shandong and even the whole country has a critical influence. In recent years Zibo area caused by lightning line tripping accidents there are more and more, has seriously affected the normal operation of power system, need analysis and corresponding improving measures are put forward.This article actual operation of overhead transmission line will be in Zibo power grid as an example, through to the Zibo power grid transmission line lightning fault data analysis summary in recent years, combined with the principle of transmission line lightning tripping and the region of transmission line lightning protection technology has been adopted measures and wiring insulation configuration, operating system summary and evaluation of the effect of protection, analyses the reason of lightning line tripping, find out the Zibo grid problems of overhead transmission line lightning protection, and through the ATP-EMTP software modeling and simulation, analyses the tower grounding resistance, insulation coordination and line lightning arrester lightning resisting level of on line tower, the influence of lightning trip-out rate, put forward the corresponding control scheme.(1) in transmission line lightning disturbance risk assessment work, clear line Louis area and tower, and provide the basis for line lightning protection governance;(2) the lightning location system of integrated GIS and application, fast analysis of lightning trip-out, finding problems of line lightning protection;(3) promoting line differential lightning protection design and transformation, to ensure that the line tower lightning resisting level;(4) the improvement of the operation maintenance and management, reduce the equipment operation aging or failure caused by lightning tripping accident, establishing and perfecting the equipment parameter of the transmission line and the technical data, strengthening supervision and management;(5) through the use of lightning protection drag-reducing lightning resisting level of new technology to improve the transmission line tower.In Zibo area 110 kV, 220 kV overhead transmission line lightning protection emphasis respectively put forward the corresponding control measures, including: using drag-reducing new technology, improve the insulation level of line tower, reduce the wire protection Angle, the use of line lightning arrester, lightning rod, erect coupling ground wire and the unbalanced insulation, etc., to reduce ray pollution accidents.