双馈异步风力发电机并网运行中几个热点问题_贺益康.pdf

32 27 Vol.32 No.27 Sep.25, 2012 2012 9 25 Proceedings of the CSEE ©2012 Chin.Soc.for Elec.Eng. 1 0258-8013 (2012) 27-0001-15 TM 315 A 470·40 1 2 (1 310027 2 430074) Several Hot-spot Issues Associated With the Grid-connected Operations of Wind-turbine Driven Doubly Fed Induction Generators 1 2 HE Yikang , HU Jiabing (1. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang Province, China; 2. College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, China) ABSTRACT: Although the installation capacity of wind turbines in our country has become the number one in the world, but there are a number of unpredictable problems, which Crowbar might become the key issues in the grid-connected operation owing to lack of long-period operation experience. To meet the grid-code requirements, it is necessary to deeply discuss the indispensable control strategy and protection measure for the –– grid-fault ride-through operation. This paper, taking aim at the Doubly-Fed Induction-Generator (DFIG), makes a thorough 0 summarization and investigation on some hot-spot issues in the grid-connected operation, especially under the grid-fault condition, which include low voltage ride through (LVRT),