变电站接地网对附近建筑物接地网和直埋金属管道的阻性耦合分析

利用矩量法定量地分析了变电站接地网对附近建筑物接地网和地下直埋金属管道的阻性耦合，获得了建筑物及管道在不同距离不同位置情况下的阻性耦合影响曲线。研究表明：当变电站接地网与建筑物接地网的尺寸一定时，前者地电位随二者之间的距离的增加而升高；当变电站接地网与建筑物接地网之间的距离一定时，二者的电位随建筑物接地网的尺寸的增大而减小；当有管道时，情况与上相似，但当管道垂直于变电站接地网放置时，其对变电站接地网电位的影响很小。在此研究基础上，提出了相应的防护措施，可为城市变电站接地网设计和城市规划提供一定的理论依据。

RESISTANCE COUPLING OF GROUNDING GRID IN SUBSTATION WITH ROUNDING GRID OF NEARBY BUILDINGS AND UNDERGROUNDED METAL PIPELINES

Based on the method of moment, the resistance coupling of grounding grid in substation with that of nearby buildings and underground metal pipelines is quantitatively analyzed and the influence curves of resistance coupling under the different distance and different position of the buildings and pipelines are obtained. The results of the research show that in case of the size of grounding grid in substation and that of the building are invariable, the potential of the former will rise along with the increment of the distance between the substation and the building; and the potentials of both grounding grid will decrease along with the enlargement of the size of grounding grid of the building. When there are underground pipelines, the situation will be similar. But when the pipelines are arranged perpendicularly to the grounding grid of the substation, the potential of the grounding grid of the substation will be slightly affected. On the basis of this research the corresponding protection measures are put forward.