Solar activity and transformer failures in the Greek national electric grid

Journal of Space Weather and Space Climate

Ioannis Panayiotis Zois¹ 

[1] Testing Research and Standards Centre, Public Power Corporation,9 Leontariou street,GR 153 51, Kantza, Pallini, Athens, Attica,Greece

关键词: aeronomy;    non-linear phenomena;    technological system;    solar activity;    geomagnetically induced currents (GIC);   

Others  :  800668
DOI  :  doi:10.1051/swsc/2013055

 received in 2012-08-03, accepted in 2013-10-27,  发布年份 2013

【 摘 要 】

Aims: We study both the short term and long term effects of solar activity on the large transformers (150 kV and 400 kV) of the Greek national electric grid. Methods: We use data analysis and various statistical methods and models. Results: Contrary to common belief in PPC Greece, we see that there are considerable both short term (immediate) and long term effects of solar activity onto large transformers in a mid-latitude country like Greece. Our results can be summarised as follows:For the short term effects: During 1989–2010 there were 43 “stormy days” (namely days with for example Ap ≥ 100) and we had 19 failures occurring during a stormy day plus or minus 3 days and 51 failures occurring during a stormy day plus or minus 7 days. All these failures can be directly related to Geomagnetically Induced Currents (GICs). Explicit cases are briefly presented.

【 授权许可】

   
© I.P. Zois, Published by EDP Sciences 2013

【 图 表 】

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