采用STATCOM与SEDC的多机系统次同步谐振抑制措施Study on Damping Scheme of Subsynchronous Resonance in a Multi-Machine System by Combination of SEDC With STATCOM
孙彦龙;班连庚;宋瑞华;项祖涛;杜宁;
摘要(Abstract):
并列同型的多台汽轮机组通过带串补线路送出时可能发生次同步谐振(subsynchronous resonance,SSR)。出力不均衡时,各机组轴系扭振行为不一致,在幅值和相位上均有差别。以双机系统为例,对并列多机系统发生SSR时各机组轴系扭振行为的差异进行了研究。时域仿真结果表明,将各机组发电机转速均取作输入信号时,仅采用静止同步补偿器(static var compensator,STATCOM)便可抑制所有机组的轴系扭振,但是抑制速度缓慢;以网侧STATCOM为主、机侧附加励磁阻尼控制(supplementary excitation damping,SEDC)为辅的联合SSR抑制措施可以结合SEDC和STATCOM各自作为SSR抑制措施的优点,快速有效地抑制多机系统SSR。
关键词(KeyWords): 多机系统;次同步谐振;附加励磁阻尼控制器;静止同步补偿器
基金项目(Foundation): 国家863高技术研究发展计划重大项目(2011AA05A119);; 国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012)~~
作者(Author): 孙彦龙;班连庚;宋瑞华;项祖涛;杜宁;
Email:
DOI: 10.13335/j.1000-3673.pst.2013.05.029
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