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远距离大型DFIG风电场的混合型HVDC建模及控制

, PP. 124-131

Keywords: 风电场,高压直流输电,混合型高压直流,双馈感应发电机

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Abstract:

针对远距离大型双馈感应发电机(DFIG)风电场,提出了一种混合型高压直流(HybridHVDC)输电方式并给了出其控制策略。在该方案中,HVDC整流侧采用基于晶闸管的相控换流器(LCC),并以STATCOM作为电压支撑为DFIG提供励磁和整流器换向电压;逆变侧采用基于全控器件的电流源型逆变器(CSI),从而达到对电网提供独立无功支撑的目的。文章首先建立了DFIG风电场及混合型HVDC并网系统的动态数学模型,然后针对其中的STATCOM子系统、整流器子系统和逆变器子系统给出了相应的控制器设计方法。经Matlab/Simulink仿真验证,该系统能够顺利完成黑启动,具有精确的功率跟踪和快速的功率响应能力,还能够向电网提供独立的无功支撑。

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