某变电站220kV出线档导线不同步风摆时相间距离过近的处理措施

Measures against Close Phase Distance of 220kV Outgoing Line of a Substation under Asynchrony Windy Pendulum Condition

通过对某变电站配套送出的220 kV线路出线档三相导线静止和不同步风摆状态下的相间距离进行计算,三相导线在静止状态下相间距离满足设计规范要求。在不同步风摆情况下,三相导线的最小相间距离均不满足设计规范中工频和操作过电压工况下间隙的要求。通过在三相导线间加装相间间隔棒,解决了在不同步风摆情况下导线相间距离不满足规范要求的问题。

By calculating the phase distance of 220kV outgoing line of a substation under the stationary andasynchrony windy pendulum condition, the phase distance under the stationary condition is found meeting the design requirements, whereas that under the asynchrony windy pendulum condition fails to meet the design requirements on power frequency voltage and switching overvoltage clearance, and the problem is solved by setting thephase spacer between and among three phases.