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电网技术  2010 

抑制次同步振荡的可控串补附加阻尼控制

, PP. 65-70

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Abstract:

可控串补(ThyristorControlledSeriesCompensator,TCSC)对次同步振荡(SubsynchronousOscillation,SSO)的阻尼特性受到多种因素的影响,其相关的研究也结论不一。就仅依靠TCSC自身来自然抑制SSO而言,其效果更待进一步的研究以及实际运行的考验。因此有必要从主动抑制的方向出发,研究TCSC的次同步附加阻尼控制。本文基于机电扭振互作用的机理,对抑制SSO的原理进行分析,进而提出一种基于相位补偿原理的TCSC次同步附加阻尼控制方法,该方法物理概念简洁清晰。针对某一实际串补系统,基于动态相量法对其建模,通过小干扰稳定分析,比较TCSC附加阻尼控制加入前后的模态阻尼比。结果表明在该控制下,系统阻尼增强,各模态扭振频率下均呈正阻尼。时域仿真也验证了控制的有效性。

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