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电网技术  2011 

呼辽±500kV直流工程送端系统次同步振荡仿真分析

, PP. 106-111

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Abstract:

基于实时数字仿真系统建立了呼辽±500kV直流工程次同步振荡问题研究的仿真模型。利用复转矩系数法,得到了部分运行方式下各机组的机械阻尼特性。阻尼特性表明,孤岛方式下,呼辽直流引发送端机组次同步振荡的风险较小,但交直流运行方式下,随着固定串补配置量的增加,机组发生次同步振荡的风险增加,可控串补可以在一定程度上降低次同步振荡的风险。时域仿真法得到的结论与复转矩系数法一致。为彻底解决送端机组次同步振荡问题,指出需进一步研究抑制次同步振荡的措施。

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