双馈风电机组中Crowbar保护综述  

Overview of Crowbar Protection for Doubly-fed Wind Turbine Generating System

作　　者：魏丽丽[1] 晁勤[1] 袁铁江[1] 

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《四川电力技术》2013年第1期12-15,69,共5页Sichuan Electric Power Technology

基　　金：新疆科技支疆项目(201091204);新疆高技术支撑计划项目(201132116)

摘　　要：电网要求风电机组具有一定的低电压穿越能力(LVRT),特别是双馈式风机(DFIG)在电网的广泛应用,研究DFIG的LVRT尤为重要。主要讲述了采用Crowbar保护电路提高DFIG的LVRT,包括转子侧Crowbar保护和直流侧Crowbar保护,并对Crowbar保护电阻大小的合理选择做了简要分析,以及对Crowbar电路投切时间的选择做了详细说明,在此基础上选择Crowbar保护可以大大提高风机的LVRT功能。A certain low voltage ride through capability （LVRT） of wind turbine is required by power grid, in particular, the doubly - fed wind turbine （DFIG） is widely used in the grid, so studying LVRT of DFIG is particularly important. The crow-bar protection circuit is adopted to improve LVRT of DFIG, including the crowbar protection of rotor side and the crowbar pro-tection of DC side. How to select the reasonable size of crowbar protective resistor is analyzed briefly, and the selection of switching time for crowbar circuit is described in detail, so on this basis, selecting the crowbar protection can greatly improve the function of LVRT.

关 键 词：低电压穿越 转子侧Crowbar保护 直流侧Crowbar保护 保护电阻 投切时间 

分 类 号：TM772[电气工程—电力系统及自动化]