Calculation of geomagnetically induced currents (GIC) in a high-voltage electric power transmission system and estimation of effects of overhead shield wires on GIC modelling |
| |
| Institution: | 1. Geomagnetic Laboratory, Natural Resources Canada, 7 Observatory Crescent, Ottawa, Ont., Canada K1A 0Y3;2. Finnish Meteorological Institute, Space Research Unit, P.O. Box 503, FIN-00101 Helsinki, Finland;1. Dipartimento di Chimica, Materiali e Ingegneria Chimica, “G. Natta”, Politecnico di Milano, Via Luigi Mancinelli 7, 20131 Milan, Italy;2. APCE, Associazione per la Protezione dalle Corrosioni Elettrolitiche, Via Maastricht 1, 20097 San Donato Milanese, Italy;1. Polar Geophysical Institute, Apatity, Russia;2. Northern Energetic Research Center, Kola Science Centre RAS, Apatity, Russia;1. School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai, Weihai, Shandong 264209, China;2. Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong 264209, China |
| |
| Abstract: | Geomagnetically induced currents (GIC) flowing in ground-based technological networks, such as electric power transmission grids, are the ground end of the space weather chain originating from the Sun. GIC constitute a possible source of problems to the system. Matrix formulas enabling the calculation of GIC in a power grid have been presented before. In this paper, we summarise the formulas and also express them in an alternative form that includes the (geo)voltages driving GIC during a space weather event more explicitly. An issue usually ignored in GIC modelling is the effect of overhead shield wires protecting a power grid and generally earthed at the towers. By numerical examples, it is shown in this paper that such neglect causes an insignificant error in comparison with other inaccuracies involved in GIC modelling and is thus really acceptable in practice. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
