Study on Distribution Characteristics of Power Frequency Exceeding Standard Electric Field of Transmission Lines

With the continuous expansion of ultra-high voltage lines in China, the design of transmission lines is carried out according to the standard, and the standard does not consider the influence of distorted electric field of buildings, resulting in frequent power frequency electric field exceeding the standard. At present, the way of demolition or erection of shielded wires is mostly used for optimization in engineering construction, but the key factors and improvement methods that cause the electric field to exceed the standard in practical engineering problems are not clear, and the effect of electric field optimization is not good. Based on the above research background, this paper studies the influencing factors of electric field intensity distribution characteristics in the vicinity of buildings around transmission lines, establishes a digital model of electric field of transmission lines, analyzes the distortion law of power frequency electric field by buildings, and puts forward the mechanism of power frequency electric field exceeding the standard of transmission lines to support the design of ultra-high voltage transmission lines.