直驱风电机组低电压穿越保护方案综述.pdfVIP

直驱风电机组的低电压穿越保护方案综述 电工电气 (20 2 No.6) 综 述 直驱风电机组的低电压穿越保护方案综述 杨玉新，刘观起，杜宝星 (华北电力大学 电气与电子工程学院，河北 保定 071003) 摘 要：对使用全功率变流器的永磁直驱风电系统的低电压穿越保护方案进行了研究，分析了定子侧、 直流侧、电网侧不同的Crowbar保护方案以及静止无功补偿、浆距角、叶尖速比三种控制策略，介绍了工 作原理及各自的优缺点。对比结果表明，采用Crowbar保护电路具有更好的市场竞争力和应用前景；故障 时网侧变流器运行在静止无功补偿模式是直驱电机固有的优势，具有优良的无功补偿性能，而浆距角及叶 尖速比的调节也对机组的穿越功能有一定的辅助作用。 关键词：风力发电；低电压穿越；Crowbar保护方案；控制策略 中图分类号：TM315 文献标识码：A 文章编号：1007-3175(2012)06-0001-04 Overview of Low-Voltage Ride-Through Protection Plan for Direct-Drive Wind Turbine YANG Yu-xin, LIU Guan-qi, DU Bao-xing College of Electrical and Electronic Engineering, North China Electric Power University, Baoding 07 003, China （ ） Abstract: This paper studied low-voltage ride-through protection plan of permanent magnetic direct-drive wind power system using full-power converter, analyzing different Crowbar protection plans at stator side, at direct current side and at power network side, and three kinds control strategies of static var compensation, propeller pitch angle and blade tip speed ratio. Introduction was made to the working principles and advantages and disadvantages of each plan and strategy. Comparison result shows that adopting Crowbar protec- tion circuit is with better market competitiveness and application prospect; converter operating in static var compensation mode at pow- er network side is the inherent advantage of direct-drive motor at fault time with fine var compensation performance, and the regulation of propeller pitch angle and blade tip speed ratio is also with certain accessorial function for ride-through function of wind generator set. Key words: wind power gener