CAJ | 학술논문

随着风力发电机组容量的迅猛发展,低电压穿越能力成为风力发电机并网运行的必要条件。对于直驱式永磁同步风力发电机而言,可以通过在不同的位置加入撬棒（Crowbar）保护电路来增强其低电压穿越能力。笔者总结了各种Crowbar保护电路的特点和适用环境,并对其控制方法进行了说明,分析了各种保护电路的优缺点。分析结果表明直流环节Crowbar保护电路的实用性和稳定性较好,是目前风力发电机组主要采用的低电压穿越方法。
수착풍력발전궤조용량적신맹발전,저전압천월능력성위풍력발전궤병망운행적필요조건。대우직구식영자동보풍력발전궤이언,가이통과재불동적위치가입효봉（Crowbar）보호전로래증강기저전압천월능력。필자총결료각충Crowbar보호전로적특점화괄용배경,병대기공제방법진행료설명,분석료각충보호전로적우결점。분석결과표명직류배절Crowbar보호전로적실용성화은정성교호,시목전풍력발전궤조주요채용적저전압천월방법。
With the rapid development of wind power generator capacity, power grid requires wind turbine generation system has ability to accomplish low voltage ride through （LVRT）. Direct-driven permanent magnet synchronous generator （PMSG） for wind power system can add Crowbar protection circuits in different places to accomplish LVRT. This paper summarizes the characteristics and applica- tions of different Crowbar protection circuits, explains the control methods, and analyses the advanta- ges and disadvantages of all kinds of protection circuits. The analysis results show that DC side Crow- bar protection circuit has high reliability and industrial applicability. Therefore this scheme applies in most wind power generation system.