The four projects involved are the 21.6MW Dreen Guajiru and the 30MW Dreen Cutia, GE Jangada and Maria Helena in the northeast state of Rio Grande do Norte.
Copel was seeking permission to extend the start of commercial operations from January 2013 to January 2018.
Aneel director José Jurhosa Jr says the regulator will consider fines for failing to meet deadlines.
Copel's lawyer claimed construction did not start because the wind farm did not sell power in recent auctions or in the free market.
