Bu Feifei

A novel 6/3-phase dual stator-winding induction generator system applied in wind power generation

The usual dual-stator winding induction generator (DWIG) is composed of three-phase power windings and three-phase control windings, named as 3/3-phase DWIG. The power winding has only three phases, and also connects to a rectifier load, which results in larger harmonic magnetomotive force (MMF) in the generator. In order to overcome these problems, the power winding of 3/3-phase DWIG is converted from three phases to six phases. A novel 6/3-phase DWIG with six-phase power windings and three-phase control windings is proposed. The six-phase power windings of it are divided into two Y windings shifted by 30° electrical angle. In this paper, the control technology of this novel 6/3-phase DWIG system operating on variable speeds is studied. Based on the control winding flux oriented scheme, for a 600 V/18 kW 6/3-phase DWIG system running at variable speeds, a series of simulations and experiments are researched. The results demonstrate that the system has the good performance over a wide speed range of 500~1000 rpm, and it is suitable for the application of wind power generation.

A novel dual stator-winding induction generator system applied in wind power generation

This paper presents a novel usage of 6/3-phase dual stator-winding induction generator (DWIG) with a static excitation power controller (SEC) as a wind power generator. This generator is composed of a standard squirrel-cage rotor and two sets of winding housed in the stator slots. One is referred to as the 6-phase power winding, and the other is defined as the 3-phase control winding. On the basis of the instantaneous power theory, the control mechanism of DWIG wind power system is analysed, and the control winding flux orientation control strategy is obtained consequently. The simulation and experimental results from a prototype of 18 kW 6/3-phase DWIG wind power system are presented to verify the correctness and feasibility of control strategy, and a desirable performance is implemented.