摘要
针对背靠背直流异步联网工程中存在的次同步振荡(SSO)现象,对基于常规直流(LCC_HVDC)的次同步阻尼控制器(LCC_SSDC)和基于柔性直流(VSC_HVDC)的次同步阻尼控制器(VSC_SSDC)的协同抑制问题进行了研究。首先针对待研究输电系统,从电磁转矩矢量合成方面分析了SSDC抑制次同步振荡的机理。然后分别设计了LCC_SSDC和VSC_SSDC的结构并整定了其参数。最后在PSCAD/EMTDC上搭建电磁暂态仿真模型,仿真结果验证了结论的正确性和所设计SSDC的有效性。
Aiming at the sub-synchronous oscillation（SSO） of the back to back DC asynchronous networking project, the coordinated restraint of sub-synchronous oscillation damping controller（SSDC） based on conventional DC and flexible DC is researched. Firstly, the mechanization of SSDC on restraining SSO is analyzed from the point of electromagnetic torque vector synthesis. Then, structures of LCC_SSDC and VSC_SSDC are designed and parameters are tuned. Finally, the simulation model is built on PSCAD/EMTDC, and the results verify the correctness of conclusion and the effectiveness of SSDC.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2016年第20期113-118,共6页
Power System Protection and Control
关键词
常规直流输电
柔性直流输电
次同步振荡
次同步阻尼控制器
LCC based DC transmission system
VSC based DC transmission system
sub-synchronous oscillation
sub-synchronous oscillation damping controller
