新疆2020年规划电网地磁感应电流的分布规律及敏感性分析
发布时间：2018-09-05 10:54
【摘要】：地磁扰动会在高压电网中诱发地磁感应电流(geomagnetically induced currents,GIC)。在相同感应地电场的作用下,高电压等级输电线路的GIC较大,准确计算超高压电网的GIC具有重要意义。以我国新疆2020年规划电网为例,只考虑750k V电压等级,建立了电网的GIC计算模型,分析了均匀地电场作用下规划电网中GIC的分布规律和方向敏感性,计算并分析了电网电阻参数对GIC的影响。利用2004年11月7日至8日的磁暴监测数据,评估了强磁暴作用下电网的GIC水平。计算结果表明,电网拓扑结构、感应地电场方向及电网参数对线路及变电站GIC影响较大,在1V/km的均匀场作用下,且末、布尔津等变电站会出现超过200A的GIC,个别线路GIC超过300A。输电线路电阻变化对GIC影响程度远大于变压器绕组电阻和接地电阻的影响程度。GIC与磁暴期间磁场变化率具有时间一致性,与所选事件强度相当的磁暴作用下,变电站和线路GIC最高可达96A和184A。
[Abstract]:Geomagnetic disturbances can induce geomagnetic induced currents (geomagnetically induced currents,GIC) in high voltage power grids. Under the same inductive geoelectric field, the GIC of transmission lines with high voltage level is larger, so it is of great significance to calculate the GIC of EHV power grid accurately. Taking the planning power grid of Xinjiang in 2020 as an example, considering only 750 kV voltage level, the GIC calculation model of the power network is established, and the distribution law and direction sensitivity of GIC in the planning power network under the action of uniform geoelectric field are analyzed. The influence of grid resistance parameters on GIC is calculated and analyzed. Based on the geomagnetic storm monitoring data from November 7 to 8, 2004, the GIC level of power grid under the action of strong magnetic storm is evaluated. The results show that the topology, the direction of induced geoelectric field and the network parameters have great influence on the GIC of the lines and substations. Under the action of the uniform field of 1V/km, at the same time, some GIC, lines with GIC exceeding 300A will appear in the Bojin substations. The influence of transmission line resistance on GIC is much greater than that of transformer winding resistance and grounding resistance. Substation and line GIC up to 96A and 184A.
【作者单位】： 西安科技大学电气与控制工程学院;国网新疆电力设计院;
【基金】：国家重点研发计划项目(2016 YFC 0800100)~~
【分类号】：TM72
本文编号：2224052
[Abstract]:Geomagnetic disturbances can induce geomagnetic induced currents (geomagnetically induced currents,GIC) in high voltage power grids. Under the same inductive geoelectric field, the GIC of transmission lines with high voltage level is larger, so it is of great significance to calculate the GIC of EHV power grid accurately. Taking the planning power grid of Xinjiang in 2020 as an example, considering only 750 kV voltage level, the GIC calculation model of the power network is established, and the distribution law and direction sensitivity of GIC in the planning power network under the action of uniform geoelectric field are analyzed. The influence of grid resistance parameters on GIC is calculated and analyzed. Based on the geomagnetic storm monitoring data from November 7 to 8, 2004, the GIC level of power grid under the action of strong magnetic storm is evaluated. The results show that the topology, the direction of induced geoelectric field and the network parameters have great influence on the GIC of the lines and substations. Under the action of the uniform field of 1V/km, at the same time, some GIC, lines with GIC exceeding 300A will appear in the Bojin substations. The influence of transmission line resistance on GIC is much greater than that of transformer winding resistance and grounding resistance. Substation and line GIC up to 96A and 184A.
【作者单位】： 西安科技大学电气与控制工程学院;国网新疆电力设计院;
【基金】：国家重点研发计划项目(2016 YFC 0800100)~~
【分类号】：TM72
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