垂直接地极对发电厂、变电所地网接地电阻的影响分析

Directly and very hang to the power plant, change the electricity to connect the influence and the analysis of a ground of electric resistance a net.

垂直接地极对发电厂、变电所接地电阻的影响并不是随着垂直接地极数量的增多呈下降趋 势,多根垂直接地体之间因屏蔽作用而不能发挥有效的降阻作用。接地网外缘装设垂直接地极、且垂直 接地极之间的间距大于其长度的2倍时,对整个接地网才有降阻作用。同时,在主变压器、避雷针、避雷 器下面的集中接地装置装设垂直接地极可以加强冲击电流的扩散。

Directly and very hang to the power plant, change a ground of electric resistance that electricity connect of influence is not along with directly and very hang the quantity increase to present to descend the trend, having another the root to hang directly of the body can't develop to decline the function of block effectively because of shield the function. Directly and very connect a ground of net exterior to equip to hang, and directly and very hang its of be apart from big in its length of 200%, to whole connect a ground of net to just decline the function of block . At the same time, the concentration that is under the main transformer, lightning rod, lightning arrester connects the proliferation that a ground of device equip to hang and directly and very can strengthen to pound at the electric current.