Cable diagnostics methods for determining degradation caused by renewable energy productionKiitam, Ivar; Taklaja, Paul; Niitsoo, Jaan; Hyvonen, Petri2015 IEEE 5th International Conference on Power Engineering, Energy and Electrical Drives (POWERENG) : proceedings : May 11-13, 2015, Riga, Latvia2015 / p. 220-224 : ill