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电网技术  2011 

伊冯/呼辽交直流系统的次同步振荡阻尼特性分析

, PP. 41-46

Keywords: 测试信号法,交直流系统,高压直流输电,可控串联补偿,次同步振荡

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Abstract:

建立了基于伊冯/呼辽交直流系统的电磁暂态模型,采用基于时域仿真实现的复转矩系数法——测试信号法,对机组施加了一系列不同频率的测试信号。计算了不同连接方式下机组在次同步频率范围内的电气阻尼特性,并考察了可控串联补偿装置对该阻尼特性的影响。最后结合时域仿真法验证了测试信号法分析结果的有效性。理论分析和仿真结果表明,在交直流系统中采用联网运行带可控串补的方式,有利于抑制高压直流输电系统和交流输电线路中串补装置引起的次同步振荡问题。

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