Danilo Laban 1, 2, Per Norrlund 1, 3, Urban Lundin 1
1 Division of Electricity, Department of Electrical Engineering, Uppsala University, Sweden
2 Fortum Sverige AB
Box 3030, SE-169 03 Solna, Sweden
3 Vattenfall AB
Älvkarleby Laboratory, 814 26 Älvkarleby, Sweden
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