풍력발전시스템용 회전자 계통연계형 이중여자 권선형 유도발전기의 설계 및 특성해석

Abstract

This paper proposes a grid-connected to a rotor type DFIG (Doubly-Fed Induction Generator) that rotor winding is connected to the grid instead of stator winding. The stator size and weight of the proposed grid-connected to a rotor type DFIG can be reduced because the proposed type can use rotor core efficiently, although the conventional grid-connected to the stator type DFIG cannot utilize core around rotating shaft as flux path. In order to verify the size and weight reduction of the proposed type, the loading distribution method (LDM) is utilized. As a design result, the stator outer diameter and weight of the proposed type was decreased by 11.3 % and 14.1 % respectively. The equivalent circuit analysis also performed to verity the design result and to analysis characteristics of DFIG.