Exploration of Compact Grounding Resistance Reduction of Distribution Line Towers Under Limited Construction Area Conditions

Distribution line tower grounding resistance can be applied to new lines or has been put into operation distribution line lightning protection maintenance, and distribution line good grounding conditions is also installed overhead ground or line lightning arrester premise. Therefore, the current distribution tower grounding resistance is to improve the line lightning performance of the most direct, most economical and most effective means. This paper first establishes a natural grounding dissipation model of distribution line tower pile base, calculates and analyzes the soil resistivity, tower depth and other factors on the influence of the pile base dissipation characteristics of the law; and then for the existing multi-tower distribution lines faced with the same tower of poor lightning performance and grounding resistance can be used for the construction of the construction of the area is insufficient and so on, put forward the flexible grounding module based on the tower of the compact grounding resistance reduction strategy, calculates and analyzes the flexible grounding module of the Calculation analysis of the flexible grounding module layout and soil conditions and other factors on the compact grounding dissipation characteristics of the law; calculations show that: the use of compact grounding grid strategy can effectively reduce the tower grounding impedance, grounding module should be used in a vertical arrangement, the increase in the number of groups of grounding modules on the effect of resistance reduction shows a trend of saturation.