Fryze reactive power of trams in effective stochastic recuperation processes Oleh Bondar, Mikola Kostin, Andrei Mukha, Olha Sheikina and Svitlana Levytska MATEC Web Conf., 294 (2019) 01006 Published online: 16 October 2019 DOI: 10.1051/matecconf/201929401006