直流附加阻尼控制抑制电力系统次同步振荡  

The Supplementary Damping HVDC Control Suppressing the Subsynchronous Oscillations in Power Systems

作　　者：李伟 韩伟强 肖湘宁[2] 

机构地区：[1]南方电网科学研究院,广州510080 [2]华北电力大学,北京102206

出　　处：《南方电网技术》2013年第2期26-30,共5页Southern Power System Technology

摘　　要：建立交直流电力系统从发电机转速到电气转矩的传递函数结构框图,分离出HVDC与发电机组产生扭振相互作用的负阻尼通道,解析地求解了SSDC需要补偿的由HVDC换流器组及其电流闭环控制共同引起的滞后相位,并给出了SSDC输入信号的次同步频率量的转换方法。针对国内某实际工程设计了宽通道的SSDC,并以时域仿真验证了所设计的SSDC控制策略的正确性和有效性。Establishing the generator speed-torque transfer path of an AC/DC system, and isolating out the negative damping path leading to the torsional interaction between the generator and HVDC system, this paper resolves the SSDC phase compensation that is for improving the retarding phase due to HVDC converters along with its closed loop current control system, and gives a transform method for the subsynchronous ffequence of SSDC input signal. An SSDC with wideband pass is developed for a practical power plant, and the correctness and validity of the SSDC control are proved with time domain electromagnetic simulation results.

关 键 词：扭振相互作用 高压直流 电力系统次同步振荡 附加阻尼控制器 

分 类 号：TM712[电气工程—电力系统及自动化] TM743