POLYTECH Peter the Great St Petersburg Polytechnic University
POLYTECH Peter the Great St. Petersburg Polytechnic University An analytical method for evaluation of solar storm impact on power system operation O. Sokolova*, Prof. N. Korovkin, Prof. V. Popov Step I GIC calculation • GIC distribution modeling in given network with certain electrojet conditions using voltage node method. Step II Contingency analysis • Estimation of installed power system equipment vulnerability as a function of calculated GIC levels. Step III Small-signal stability analysis • Determination of reactive power growth as a function of transformer’s type [1] and rated reactive power margin calculation. Step IV Control algorithms analysis • Relay protection algorithm efficiency verification due to instrument transformer failure to operate. Step V Mitigation assessment • Determination of optimum or nearly optimum control actions using analytical dependences between power state and control parameters [2]. Step VI Topological analysis • Determination of topological schemes which correspond to minimum or nearly minimum GIC risk and ensure electricity supply requirements. Step VII Mitigation • Sector-wide basis analysis of utility response to financial, technological and social services interruption. coordination *E-mail: olga. sokolova@gmx. ch Research goal: to develop an analytical method for evaluation of solar storm impact on power grid operation in order to design better policies for reliable and high quality power supply. Figure 1. 118 bus IEEE test scheme. Reference [1] X. Dong, Y. Liu, J. Kappenman, “Comparative analysis of exciting current harmonics and reactive power consumption from GIC saturated transformers”, Proc. IEEE PES 2001 Winter Meeting, Columbus, OH, USA, Jan. 2001 pp. 318 -322 [2] O. Sokolova et all. “Optimization principles of the emergency actions in the postemergency state of the megapolis power systems”, Power Technology and Engineering, Springer, 2011 vol. 45
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