Research On Wind Protection And Lightning Protection Strategy In Power Distribution System Operation

The distribution network of l0 kV and below has the characteristics of wide distribution,multiple equipments,and long lines,which brings great difficulties to the maintenance of distribution network systems of 10 kV and below.The area where the author works is a region prone to natural disasters.Typhoons and lightning strikes often cause faults in the distribution network,which leads to large-scale power outages;this not only affects the stability of the power supply,but also brings to the maintenance personnel of the distribution system below 10 kV.A lot of work load.In order to reduce the occurrence of electric shock accidents in 10 kV and below distribution networks and improve their windproof capabilities,the author analyzes the factors affecting lightning accidents and typhoon accidents in the region,starting with the factors affecting the windproof and lightning protection capabilities of the line,analyzing the relevant calculations and finding impacts.Further analysis of the larger-scale parameters,combined with geographical features and meteorological characteristics of the region,proposes effective measures to improve wind protection and lightning protection for distribution network systems of 10 kV and below.The specific research content is as follows:The first chapter introduces the background of this research,and summarizes the research status quo of the relevant technologies of the lightning protection and windproof research of the distribution network,and discusses windproof and lightning protection in combination with the current lightning faults of 10 kV and below distribution networks and the hazards of strong wind failures.Measures the significance of the study.The second chapter focuses on the analysis of the characteristics and types of lightning strike failures and gale faults in distribution operations,and recognizes the causes of lightning failures and high wind failures.It also analyzes the stability,safety,and reliability of power supply systems for gale and lightning strikes.Influence,resolve the danger of failure.The third chapter analyzes the windproof capacity and the thunder and thunderbolt ability of distribution lines with 10 kV and below based on the local conditions.Through the wind load calculation and analysis method to understand the factors influencing the windproof capacity of the line,the factors affecting the lightning protection capability of the line are known through the calculation and analysis of overvoltage.Fully understand the direction of wind and lightning protection and lay the foundation for effective measures.The fourth chapter puts forward measures for wind and lightning protection for lines of 10 kV and below on the basis of the previous text.Considering multiple aspects and multiple angles,the existing lines will be improved and the new construction line will be optimized to improve the windproof and lightning protection capabilities of the line and reduce the high wind failure.Lightning strikes occur.At the same time,combined with a representative 10 kV and below distribution system,a small-scale feasibility test was conducted to verify the effectiveness of wind and lightning protection measures,laying the foundation for future research.The fifth chapte selects representative distribution systems under 10 kV to carry out a small-scale feasibility test to verify the effect of the implementation of wind and lightning protection measures.At the same time,a new trial scheme of wind and lightning protection is proposed,and the actual pilot application of the two schemes in Guangdong power grid is analyzed.