Research On Differential Lightning Protection Of Transmission Lines In Anhui

Lightning is a frequently occurring natural disaster.With the increasing scale of power transmission and transformation equipment,lightning strike has become a high-risk factor affecting its safe and stable operation.Lightning trip times in various regions of China generally reach about 40% of the total trip times.Lightning protection has always been one of the focuses of power workers.The terrain of Anhui is complex,high in the southwest and low in the northeast.The landform is different from north to south,complex and diverse.The Yangtze River and the Huaihe River run across the province,dividing the whole province into three natural regions: the Huaibei plain,the Jianghuai hills and the southern Anhui mountains.To the north of the Huaihe River,it is a part of the North China Plain;Between the Yangtze River and Huaihe River,there are towering mountains in the west,rolling hills in the East,and winding mountains and hills;The two sides of the Yangtze River are low and flat,with rivers and lakes crisscrossing.The areas along the Yangtze River are rich in mineral resources.The mountainous areas in southern Anhui are mainly mountainous and hilly,and lightning activities are frequent,which has seriously affected the safe operation of Anhui power grid and the reliability of power supply.The data shows that lightning trip accounts for a large proportion of the total number of line trips in recent years,and has a rising trend.It is imperative to study the application of lightning protection measures for transmission lines.Through the combination of field operation and theoretical research,explore the effectiveness of different lightning protection measures.In this paper,firstly,the lightning stroke characteristics of transmission lines are calculated and analyzed in detail,and the effective information is extracted from the data,focusing on the calculation methods of shielding and counterattack lightning of transmission lines.The data obtained in this paper are obtained through official channels,with high authenticity and reference.The software mainly used in this research is the Anhui power grid lightning intelligent detection system,which extracts lightning data,extracts the coordinate parameters of the target area,and draws the lightning density distribution map.Through data comparison and judgment,the basic data of differentiated lightning protection of transmission lines are obtained,and then the actual tower operation data of AC transmission lines in specific areas are selected for lightning protection verification.The analysis of current lightning protection facilities and use effects in Anhui Province,the regional differentiated lightning protection recommendations in Anhui and the differentiated lightning protection transformation plan of transmission lines are carried out.Through the above data collection,simulation research and theoretical analysis,we can provide a scientific and guiding basis for the operation and maintenance of transmission lines and fault analysis.We can also analyze the lightning protection design of transmission lines in Anhui from the macro and micro perspectives,and apply this process to the differentiated lightning protection design of other regions or specific lines in a modular manner,so as to achieve lean transmission line design,operation and maintenance,and improve the economy,It has high application value.