[IEEE PICA'99 - Power Industry Computer Applications Conference - Santa Clara, CA, USA (16-21 May 1999)] Proceedings of the 21st International Conference on Power Industry Computer Applications. Connecting Utilities. PICA 99. To the Millennium and Beyond (Cat. No.99CH36351) - Optimal phase arrangement of distribution transformers connected to a primary feeder for system unbalance improvement and loss reduction using a genetic algorithm