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含虚拟惯性与阻尼控制的变速风电机组综合PSS控制器

, PP. 159-169

Keywords: 风力发电,虚拟惯量,频率响应,功率振荡,阻尼

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Abstract:

大规模风电场接入电网将削弱系统的惯性和阻尼特性,不利于电网安全运行。本文首先分析变速风电机组的传统功率控制,根据虚拟转动惯量与转速调节及电网频率变化的关系,提出适用于变速风电机组的虚拟惯性控制策略,解决高风电渗透率区域电网惯性不足的问题。其次,通过分析所提虚拟惯性控制对系统阻尼特性的影响,发现该控制方法对功率振荡具有抑制作用,实现了惯性控制与阻尼控制在有功环节上的有机结合。为进一步增强风电机组的阻尼能力,提出无功阻尼控制与虚拟惯性控制相结合的综合控制方案,从而完善风电场对系统的支持能力。最后,通过对含变速风电机组区域电网的仿真分析,验证在所提控制方案下风电机组不仅能够快速对电网提供频率支持,并且具备阻尼系统功率振荡的能力。

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