摘要
为推算水平排列同塔四回线路跨越建筑物时所需的安全距离,以500kV同塔四回线路为例,采用CDEGS软件仿真计算线路跨越、邻近不同高度建筑物时建筑物顶部和阳台处的工频电场畸变情况,并以此推算了导线水平排列同塔四回线路跨越建筑物的最小垂直安全距离和最小水平安全距离。结果表明,建筑物附近的畸变电场成为制约输电线路与建筑物安全距离的关键因素;现有规程推荐的线路与建筑物的安全距离已不再适用于同塔四回线路跨越民房的情况;建筑物与线路间所需的安全距离由线路电压等级、建筑物高度、杆塔结构等因素共同决定。最后,给出110kV、220kV、500kV同塔四回线路以及220kV/110kV、500kV/220kV混压同塔四回线路跨越建筑时所需的安全距离,其计算方法与结果可为输电线路与建筑物交叉跨越提供工程参考。
To calculate the secure distance of quadruple-circuit transmission lines on the same tower with horizontal arrangements passing over buildings, power-frequency electric field distortion on the roof and the balcony is calculat- ed and analyzed with CDEGS when 500kV quadruple-circuit transmission lines pass over the building. And the secure distance between conductors and building is proposed based on distorted electric field, including minimum vertical secure distance and minimum horizontal secure distance. The results show that distorted electric field is the most important constraint factor for determining secure distance between transmission lines and buildings; the secure distance recommended by existing regulations cannot satisfy the requirements of quadruple-circuit transmission lines cross the buildings; the secure distance is decided by the factors such as line voltages, height of the buildings and tower structures. In the end, the secure distance of 110kV, 220 kV quadruple-circuit transmission lines and 220 0 kV/ll0 kV, 500 kV/220 kV mixed-voltage quadruple-circuit transmission lines across buildings is also calculated. The conclusion provides reference to design transmission lines crossing buildings for the practical engineering.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第8期1884-1892,共9页
High Voltage Engineering
关键词
同塔四回线路
水平排列
建筑物
畸变电场
安全距离
CDEGS
quadruple-circuit transmission line on the same tower
horizontal arrangements
building
distorted electric field
secure distance
CDEGS
