Analysis of Electromagnetic Force on Rotor End Windings of a 300 MW Variable-Speed Generator Motor for Pumped Storage

Table 1

Specification of the analysis model.

Item	Specification	Unit
Rated apparent output	333.3	MVA
Rated voltage	15.75	kV
Rated power factor	0.9
Rated frequency	50	Hz
Rated speed	428.6	r/min
Speed range	±5	%
Number of poles	14
Flywheel moment	5700	t⋅m^2
Stator core outer diameter	6830	mm
Stator core inner diameter	5640	mm
Air-gap width	20	mm
Number of stator slots	357
Number of rotor slots	231
Stator winding pitch	22
Rotor winding pitch	14