Three-Phase Winding Design for Large Hydro-Generators

High-voltage stator windings for large salient-pole synchronous machines in hydro power applications are designed based on manufacturing, maintenance, cost and electromagnetic performance issues. This paper discusses various aspects for designing standard three-phase windings and in particular presents a novel method for minimizing the number of external connections in wave winding application. A special section is dedicated to unbalanced winding parallel circuits due to coil bypass for quick repair in the case of bar or coil failures.