摘要
为深入研究变电站内工频电场在有无考虑站内建筑物情况时的分布情况,以500 kV变电站为例,在CDEGS软件环境下对变电站内电气设备和建筑物进行建模并进行工频电场分布的仿真计算。通过仿真结果与实测结果的对比,验证了所建模型的正确性。接着分析了变电站内有建筑物时的工频电场分布情况。结果表明500 kV变电站的工频电场强度较大值主要集中在导线交叉与靠近开关场外侧导线附近,站内的建筑物使其周围的工频电场发生较大畸变,随着建筑物高度的增加、离开关场越近,其畸变越严重。并进一步提出将变电站设备基座整体升高1.2 m可有效降低站内工频电场强度。
In order to study the distribution of power-frequency electric field in substation with/without considering the buildings inside, taking a 500 kV substation as the example, we established a model of its electrical equipment and buildings using CDEGS and calculated the power-frequency electric field. Comparison between the simulation results and the measured data proves the established model to be valid. Then we analyzed the distribution of power-frequency electric field in a substation by taking buildings inside into consideration. It is obtained that the stronger parts of the electric field mainly locate under the crossing wire and the wires nearby the outside of switching yard. The existence of the building distorts the power-frequency electric field significantly： the taller the buildings are and the closer to the switch yard they are, the greater the distortion is. Consequently, we proposed that increasing the base height of all the devices in substation by 1.2 m could effectively restrain the power-frequency electric field in substation within the safety limit.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第1期294-299,共6页
High Voltage Engineering
基金
国家自然科学基金(51277189)
国家"111"创新引智计划项目(B08036)
中央高校基本科研业务费专项资金(CDJXS12151108)~~
关键词
500KV变电站
CDEGS软件
工频电场
站内建筑
畸变电场:电场改善
500 kV substation
software CDEGS
power-frequency electric field
building in substation
distortion of electric field
electric field improvement
