The dual induction generator for renewable energy conversion systems. Experimental results, problems and solutions

The paper concerns a dual (double) split-wound three-phase stator windings induction generator having the same poles number (split-wound). The separate stator windings have distinct functions — excitation and, respectively, electric energy generation, that assures the physical decoupling of the excitation and of the load and their control simplification, There was considered [1] 90 electrical degrees space displacement between the excitation and the load windings — orthogonality, that assures the mutual magnetic decoupling of the two windings. The paper presents, mainly, experimental results on load modes of operation, as well as on the problem of windings current harmonics due to the presence of different types rectifiers [3][4] at generator ends.