2Van der Broeck H W,etc. Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vector[J]. Proc IEEE IAS Annu. Meeting,Denver,CO,1986:244- 251.
6Nian Heng,Liu Jiao,Zhou Peng,He Yikang. Improved Control Strategy of an Active Crowbar for Directly-driven PM Wind Generation System under Grid Voltage Dips[J].International Conference on Electrical Machines and Systems,2008,(01):2294-2298.