Cause Diagnosis of Lightning Damage in Transmission Corridor Based on Parameter Normalization Model
摘要
Transmission lines have different risks of lightning accidents due to the differences of route topography, line structure, lightning activity intensity and other factors. It is of great significance to study the causes of lightning damage of transmission lines for the safe operation of power grid. Therefore, this paper first establishes parameter reference intervals based on the statistical results of multi-source data and refers to national standards, and then forms a parameter normalization model as the basis for subsequent research. Then, an analysis method of the cause of lightning damage based on parameter state is proposed. A 220 kV line and a typical tower are analyzed. It is found that the ground flash density is the biggest cause of lightning damage, accounting for 27.9%, and the pole tower of the line may have a serious risk of lightning damage.