山东电网磁暴灾害风险及研究进展

Magnetic Storm Disaster Risk and Research Progress of Shandong Power Grid

针对山东电网"西电东送"的格局及半岛环海的地形特征,分析了山东电网的磁暴灾害风险。结合2015年山东电网500 k V主网架,选取典型磁暴感应出的地面电场数值,使用MATLAB仿真软件计算了最大运行方式下变电站的GIC水平。计算结果表明,连接线路数少、位于电网末端或拐角、连接有长线路的变电站容易诱发较大的GIC,其绝对平均值最高可达25.7 A,成为危险点变电站。结合磁暴灾害对省域规模电网的影响,综述了山东电网磁暴灾害的研究进展,并提出了进一步研究"海岸效应"影响机理和构建GIC监测平台的建议。

This paper anaylizes magnetic storm risk of Shandong power grid based on the pattern oi West-to-East Power Diversion and topographic feature of peninsula surrounded by sea.Combining 500kV main frame of Shandong power grid in 2015,it selects the ground electric field value sensed by typical magnetic storm and uses simulation software MATLAB to calculate GIC level of a substation under maximum operation mode.The calculation result indicates that a substation which is connected to less lines and long lines and located at the end or corner of power grid tends to trigger bigger GIC.Since the maximum average absolute value can be up to 25.7A, it becomes a substation at dangerous point.Combining impact of magnetic storm on provincial power grid,it summarizes magnetic storm research progress of Shandong power grid,and brings forward impact mechanism of further researching Coastal Effect and suggestions of building GIC monitoring platform.