4Cirrineione M, Pueei M, Cirrineione G,et al. A New Adaptive Integration Methodology for Estimating Flux in Induction Machine Drives [J]. IEEE Transactions on Industry Applications,2004, 19(1): 25-34.
5Habetler T G, Profumo F, Griva G,et al. Stator Resistance Tuning in a Stator-flux Field-oriented Drive Using an Instantaneous Hybrid Flux Estimator[J]. IEEE Trans. on Power Electronics,1998, 13(1): 125-133.
6HU J, WU B. New Integration Algorithms for Estimating Motor Flux Over a Wide Speed Range [J]. IEEE Transactions on Power Electronics, 1998, 13(5): 969-977.
7Muller S, Deicke M, et al. Doubly fed induction generator system for wind turbines[J]. IEEE Industry Application Magazine, 2002, 8(3): 26-33.
8Idsoe Nass B, et al. Methods for reduction of voltage unbalance in weak grids connected to wind plants[C]. IEEE Wordshop on Wind Power and the Impacts on Power System, 17-18 June 2002, Norway.
9Guan Chyun Hsieh, James C Hung. Phase locked loop techniques-a survey[J]. IEEE Transactions on Industrial Electronics, 1996, 43(6): 609-615.
10Zhan Changjiang, Fitaer C, Ramachandaramurthy V K, et al. Software phase-locked loop applied to dynamic voltage restorer (DVR)[C]. IEEE Power Engineering Society Winter Meeting, 2001, 3: 1033- 1038.