基于模态控制的附加阻尼控制器的设计  

Design of Modal-Based Supplementary Subsynchronous Damping Controller

作　　者：李伟[1] 肖湘宁[1] 郑蕤[1] 张丹[1] 殷威扬[2] 李亚男[2] 蒋维勇[2] 

机构地区：[1]电力系统保护与动态监控教育部重点实验室(华北电力大学),北京市昌平区102206 [2]北京网联直流工程技术有限公司,北京市东城区100005

出　　处：《电网技术》2010年第10期76-81,共6页Power System Technology

基　　金：国家电网公司重点科技项目(KH0954)

摘　　要：使用换流器的开关函数分析了HVDC交直流侧次同步电气量相互传递的关系,从次同步频率层面深入阐述了由HVDC控制系统引起系统次同步振荡(subsynchronous oscillations,SSO)的机制。基于时域仿真的复转矩系数法详细地研究了交直流电力系统次同步阻尼特性,并对次同步阻尼控制器(supplementary subsynchronous damping controller,SSDC)抑制SSO的原理进行了重点论述,提出了基于模态控制的SSDC的设计方法。针对国内一个实际次同步振荡问题设计了SSDC,通过时域仿真验证了该SSDC原理的正确性和抑制SSO的有效性。The inter-transmission of subsynchronous electrical parameters between AC and DC sides of HVDC power transmission system is analyzed by switching functions of converter, and in term of subsynchronous frequency the mechanism of subsynchronous oscillations （SSO） in power grid caused by the control system of HVDC system is expounded. By use of complex torque coefficients in time-domain simulation the subsynchronous damping characteristic of AC/DC power grid is researched in detail, and the principle of suppression SSO by supplementary subsynchronous damping controller （SSDC） is emphatically discussed, then the design approach for the design of modal control-based SSDC is proposed. In allusion to an actual SSO occurred in a certain power grid in China, a modal control-based SSDC is designed. The correctness of the principle applied in the design of modal control-based SSDC and its effectiveness in suppressing SSO are verified by time-domain simulation.

关 键 词：次同步振荡 附加阻尼控制器 模态控制 呼辽直流输电系统 

分 类 号：TM71[电气工程—电力系统及自动化]