Modeling Geomagnetically Induced Currents From Magnetometer Measurements: Spatial Scale Assessed With Reference Measurements
Modeling Geomagnetically Induced Currents From Magnetometer Measurements: Spatial Scale Assessed With Reference Measurements
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DOI：
10.1002/2017sw001602
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
M. Butala;M. Kazerooni;J. Makela;F. Kamalabadi;J. Gannon;Hao Zhu;T. Overbye
中科院分区：
文献类型：
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作者：
M. Butala;M. Kazerooni;J. Makela;F. Kamalabadi;J. Gannon;Hao Zhu;T. Overbye
太阳能驱动的扰动会产生地磁感应电流（GIC），这可能导致电网不稳定，在最极端的情况下，甚至会导致故障。磁力计提供了地磁扰动（GMD）对表面磁场的影响的直接测量，并且可以从电网拓扑结构和工程参数确定GIC响应。本文认为这一系列的模型：通过电磁传递函数将表面磁场扰动转化为感应表面电场，然后使用PowerWorld模拟器模拟现实的电网拓扑结构，将感应表面电场转化为GIC。比较由美国传输公司提供的Transformer中性点电流参考测量。研究了三个GMD间隔，Kp指数在2013年10月2日达到8−，2013年6月1日达到7，2013年10月9日达到6−。最后，建模测量GIC的相关性进行了分析，作为磁力计GIC传感器距离的函数。结果表明，在三个研究的GMD间隔的建模保真度是强烈依赖于两个磁强计变电站Transformer基线距离和GMD强度。
Solar‐driven disturbances generate geomagnetically induced currents (GICs) that can result in power grid instability and, in the most extreme cases, even failure. Magnetometers provide direct measurements of the geomagnetic disturbance (GMD) effect on the surface magnetic field and GIC response can be determined from the power grid topology and engineering parameters. This paper considers this chain of models: transforming surface magnetic field disturbance to induced surface electric field through an electromagnetic transfer function and, then, induced surface electric field to GIC using the PowerWorld simulator to model a realistic power grid topology. Comparisons are made to transformer neutral current reference measurements provided by the American Transmission Company. Three GMD intervals are studied, with the Kp index reaching 8− on 2 October 2013, 7 on 1 June 2013, and 6− on 9 October 2013. Ultimately, modeled to measured GIC correlations are analyzed as a function of magnetometer to GIC sensor distance. Results indicate that modeling fidelity during the three studied GMD intervals is strongly dependent on both magnetometer to substation transformer baseline distance and GMD intensity.