https://gmd.mste.illinois.edu/taxonomy/term/34 en https://gmd.mste.illinois.edu/node/66 <span>The Impact of Magnetic Field Temporal Sampling on Modeled Surface Electric Fields</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/1" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">admin</span></span> <span>Thu, 11/15/2018 - 16:56</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2018-11/swe20772-fig-0001-m.png" width="500" height="243" alt="a graph showing the distribution of impedance tensors across the contiguous United States" typeof="foaf:Image" /></div> <div><p>Matthew Grawe, Jonathan Makela, Mark Butala, and Farzad Kamalabadi published an article in the October 2018 issue of <em>Space Weather</em> which explores the influence of magnetometer sampling rate on modeled peak electric fields. They discovered that a one-minute magnetometer data cadence can lead to a significant underestimation of the peak electric field, especially in certain regions of the US during strong geomagnetic storms.</p> <p><a href="https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018SW001896">Read the full article on the AGU Publications website</a>.</p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Thu, 15 Nov 2018 22:56:00 +0000 admin 66 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/55 <span>A Comparison of Peak Electric Fields and GICs in the Pacific Northwest Using 1-D and 3-D Conductivity Authors J. L. Gannon, A. B. Birc</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/1" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">admin</span></span> <span>Mon, 12/04/2017 - 17:09</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-12/A%20Comparison%20of%20Peak%20Electric%20Fields_1.PNG" width="640" height="345" alt="electric field maps showing V/km with gradations of color" typeof="foaf:Image" /></div> <div><p>Gannon, Birchfield, Shetye, and Overbye published an article in the November 2017 issue of <em>Space Weather</em> investigating the fidelity of a one-dimensional model measuring the geomagnetically induced currents in a Pacific Northwest system. By comparing a 1-D model to a 3-D model, they explore specific limits of the traditional 1-D modeling system.</p> <p><a href="http://onlinelibrary.wiley.com/doi/10.1002/2017SW001677/full">Read the full article on the AGU Publications website</a>.</p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Mon, 04 Dec 2017 23:09:36 +0000 admin 55 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/54 <span>Incorporating the geomagnetic disturbance models into the existing power system test cases</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/1" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">admin</span></span> <span>Mon, 12/04/2017 - 16:04</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-12/Incorporating%20the%20geomagnetic%20disturbance%20models.png" width="529" height="408" alt="the geographic layout of a system graphed on X and Y axes" typeof="foaf:Image" /></div> <div><p>Kazerooni and Overbye presented a paper at the 2017 IEEE Power and Energy Conference at Illinois proposing a framework to generate the parameters necessary to use public test cases for GMD studies. Identifying the geographic coordinates of substations as vital but missing parameters, they present two graph drawing algorithms that allow these coordinates to be determined through a generated geographic layout. They then evaluate the effectiveness of their proposed framework.</p> <p><a href="http://ieeexplore.ieee.org/abstract/document/7935749/">Read the full article on IEEE Xplore</a>.</p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Mon, 04 Dec 2017 22:04:16 +0000 admin 54 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/53 <span>Mitigation of Geomagnetically Induced Currents Using Corrective Line Switching</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/1" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">admin</span></span> <span>Mon, 12/04/2017 - 15:51</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-12/Mitigation%20of%20Geomagnetically%20Induced%20Currents.PNG" width="521" height="362" alt="graph of reactive power loss vs number of opened lines using the proposed line switching algorithm" typeof="foaf:Image" /></div> <div><p>Kazerooni, Zhu, and Overbye published a paper in the September 2017 issue of <em>IEEE Transactions on Power Systems </em>investigating a line switching strategy to mitigate geomagnetically induced currents in large-scale power systems. They describe an algorithm used to find an optimal switching strategy for specific outcomes, model its effect, and analyze its computational complexity in large system implementations.</p> <p><a href="http://ieeexplore.ieee.org/document/8048485/">Read the full article on IEEE Xplore</a>.</p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Mon, 04 Dec 2017 21:51:36 +0000 admin 53 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/52 <span>Modeling Geomagnetically Induced Currents From Magnetometer Measurements: Spatial Scale Assessed With Reference Measurements</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/1" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">admin</span></span> <span>Mon, 12/04/2017 - 15:30</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-12/Modeling%20Geomagnetically%20Induced%20Currents.png" width="1064" height="870" alt="a map of current measurement and survey sites used in the study" typeof="foaf:Image" /></div> <div><p>Butala, Kazerooni, Makela, Kamalabadi, JGannon, Zhu, and Overbye published an article in the October 2017 issue of <em>Space Weather</em> exploring the fidelity of a model mapping geomagnetic disturbance measurements to geomagnetically induced currents. They compare data from their model to reference measurements provided by the American Transmission Company during three GMD intervals.</p> <p><a href="http://onlinelibrary.wiley.com/doi/10.1002/2017SW001602/full">Read the full article on the AGU Publications website</a>.</p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Mon, 04 Dec 2017 21:30:12 +0000 admin 52 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/48 <span>GEM Summer Workshop 2017 Presentations</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/16" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">richrds2</span></span> <span>Tue, 07/25/2017 - 09:10</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-07/mag2.gif" width="346" height="154" alt="GEM Summer Workshop 2017 Presentations" typeof="foaf:Image" /></div> <div><p>The Geospace Environment Modeling (GEM) program is a National Science Foundation (NSF) Division of Atmospheric Sciences initiative to coordinate and focus research on the near-earth portion of geospace from the lower ionosphere to where the earth system interacts with the solar wind.</p> <p>The purpose of the GEM program is to support basic research into the dynamical and structural properties of geospace, leading to the construction of a global geospace general circulation (GGCM) model with predictive capability. The GGCM effort is now being treated as a separate campaign. The strategy for achieving GEM goals is to undertake a series of campaigns, in both theory and observational modes, each focusing on particular aspects of the geospace environment.</p> <p>The following research was presented during the 2017 GEM Summer Workshop: </p> <ul><li><span><span><span><span>Zhonghua Xu et al., A conjugate TCV event study with multiple points observations on Jan 19, 2013 GEM Summer Workshop 2017, Portsmouth, VA</span></span></span></span></li> <li><span><span><span><span>Dong Lin et. al., Electromagnetic Particle-in-cell Simulation of Electron-Ion Hybrid Instability, GEM Summer Workshop 2017, Portsmouth, VA</span></span></span></span></li> <li><span><span><span><span>Taikara</span></span></span><span><span><span> Peek et. al., Ultra Low Frequency Wave Activity During the St. Patrick's Day Events, GEM Summer Workshop 2017, Portsmouth, VA</span></span></span></span></li> </ul><p><a href="http://www.cpe.vt.edu/gem/index.html">Click here to learn more about the conference</a></p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Tue, 25 Jul 2017 14:10:40 +0000 richrds2 48 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/46 <span>Wavelet-Based ULF Pulsation Index for Studying Conjugate ULF Pulsation at High Latitudes and Its Applications to Space Weather</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/16" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">richrds2</span></span> <span>Tue, 07/25/2017 - 08:49</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-07/Screen%20Shot%202017-07-25%20at%208.48.53%20AM.png" width="485" height="410" alt="Wavelet-Based ULF Pulsation Index for Studying Conjugate ULF Pulsation at High Latitudes and Its Applications to Space Weather" typeof="foaf:Image" /></div> <div><p>Zhonghua XU, M D Hartinger, C R Clauer, H Kim, D R Weimer, and K Deshpande presented their findings at the AGU Fall Meeting in 2016 related to the wavelet-based ULF Pulsation Index. A wavelet-based index is described in this study and applied to present geomagnetic Ultra Low Frequency (ULF) pulsations observed in Antarctica and their magnetically conjugate locations in West Greenland. They discussed how the wavelet indices can be used to monitor geomagnetic pulsations in both hemispheres simultaneously. The wavelet analysis shows valuable information for GIC- related studies, including the spectrum, correlation, and magnitude of the geomagnetic pulsations.</p> <p><a href="https://vtechworks.lib.vt.edu/handle/10919/77539">Read more about their presentation here</a></p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Tue, 25 Jul 2017 13:49:11 +0000 richrds2 46 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/45 <span>Power Network Topology Control for Mitigating the Effects of Geomagnetically Induced Currents</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/16" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">richrds2</span></span> <span>Tue, 07/25/2017 - 08:37</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-07/powernetworkTopology.gif" width="442" height="227" alt="Power network topology control for mitigating the effects of geomagnetically induced currents" typeof="foaf:Image" /></div> <div><p>Klauber and Zhu published a paper in Signals, Systems and Computer for the 5oth Asilomar Conference in 2016. They consider the problem of designing operational Geomagnetically Induced Current (GIC) mitigation strategies by switching transmission lines. This topology control approach could relieve the power network from temporarily high level of GIC flows, without significantly affecting the security of grid operations.</p> <p><a href="http://ieeexplore.ieee.org/document/7869049">Read the full article on the IEEE Website</a></p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Tue, 25 Jul 2017 13:37:00 +0000 richrds2 45 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/44 <span>Transmission System Geomagnetically Induced Current Model Validation</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/16" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">richrds2</span></span> <span>Tue, 07/25/2017 - 08:22</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-07/Webp.net-resizeimage.gif" width="878" height="570" alt="Transmission System Geomagnetically Induced Current Model Validation" typeof="foaf:Image" /></div> <div><p>Kazerooni, Zhu, Overbye, and D. A. Wojtczak published a paper in the May 2017 <em>IEE Transactions on Power Systems</em> journal about transmission system Geomagnetically Induced Current (GIC) model validation. This paper focuses on validating the model which relates the GICs to their deriving electric field. A novel validation framework is proposed with the advantage of considering the system uncertainties and network information availability.</p> <p><a href="http://ieeexplore.ieee.org/document/7527645/">Read the full article on the IEEE Website</a></p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Tue, 25 Jul 2017 13:22:27 +0000 richrds2 44 at https://gmd.mste.illinois.edu https://gmd.mste.illinois.edu/node/43 <span>Statistical Considerations in the Creation of Realistic Synthetic Power Grids for Geomagnetic Disturbance Studies</span> <span><span lang="" about="https://gmd.mste.illinois.edu/user/16" typeof="schema:Person" property="schema:name" datatype="" xml:lang="">richrds2</span></span> <span>Fri, 07/21/2017 - 10:15</span> <div> <img src="https://gmd.mste.illinois.edu/sites/default/files/2017-07/research5.PNG" width="1341" height="561" alt="Statistical Considerations in the Creation of Realistic Synthetic Power Grids for Geomagnetic Disturbance Studies" typeof="foaf:Image" /></div> <div><p>Birchfield, Gegner, Xu, Shetye, and Overbye published research on the statistical considerations of creating realistic synthetic power grids for geomagnetic disturbance studies. Their paper presents a process to generate synthetic power<br /> system test cases, focusing on building cases appropriate for GMD studies. </p> <p><a href="http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7515182">Read the full article on the IEEE website.</a></p> <p> </p></div> <div> <div>Categories</div> <div> <div><a href="https://gmd.mste.illinois.edu/taxonomy/term/34" hreflang="en">geomagnetically induced currents</a></div> </div> </div> Fri, 21 Jul 2017 15:15:40 +0000 richrds2 43 at https://gmd.mste.illinois.edu