Optimisation Of Electrically Conductive Concrete Module Grounding

Power as one of the basic resources of the national economy and people’s livelihood and has the important significance on the sustainable development of society and people’s daily life. With the increasing of the scale of power grid construction in China, the construction of the transmission line density is becoming more and more big and the grid accidents is more and more frequent. Zhangjiakou power networks as the Hebei north hub, which have an important responsibility to bear the Beijing-Tianjin region transport electricity and ensure the safety of power supply. However, due to the restriction of such factors as geographical environment, the grounding device form, and line tripping accidents have occurred much, and the main reason is that the grounding resistance is too large, serious corrosion of grounding network. In order to effectively reduce the tower grounding resistance and improve the corrosion resistance and durability of grounding network, the conductive concrete ground net is becoming the research focus, and compared with the original metal grounding network, which can effectively improve the service life of grounding network and has practical significance for the improvement of grounding systems located in optimization.This paper presented the further optimization design of module grounding network of the conductive concrete, and analyzed the existing transmission line tower grounding resistance and grounding type, and the preparation of different shapes of conductive concrete grounding module, measuring the grounding resistance of different grounding type, grounding module of the shape and type of conductive concrete is optimized, as conductive concrete ground net in popularization and application of transmission line tower grounding engineering foundation.The results show that the conductive grounding modules can effectively reduce the grounding resistance. With the increase of conductive concrete grounding modules in parallel number, the grounding area increased and the grounding resistance decreased. Laying the spacing, the greater the module utilization coefficient, the greater the effect of discharge, and considering the module utilization coefficient and the resistance reduction requirements, module arrangement spacing appropriate should choose 20 ~ 50 cm. Under the same diffuser area, cylindrical diffuser of conductive concrete grounding modules effect is better than square diffuser effect of module, circular grounding type and straight line type grounding effect than Hollow Square and square of implementing effect is good.