一种应用于LCC高压直流输电的级联H桥混合型有源滤波器  

A Cascaded H-bridge Hybrid Active Power Filter Applied to LCC-HVDC

作　　者：李双健 杜夏冰 贾秀芳 季一鸣 赵成勇 史善哲 LI Shuangjian;DU Xiabing;JIA Xiufang;JI Yiming;ZHAO Chengyong;SHI Shanzhe(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources(North China Electric Power University),Changping District,Beijing 102206,China;State Grid Economic and Technological Research Institute Co.,Ltd.,Changping District,Beijing 102209,China;State Grid Hebei Electric Power Supply Co.,Ltd.,Shijiazhuang 050021,Hebei Province,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]国网经济技术研究院有限公司,北京市昌平区102209 [3]国网河北省电力有限公司,河北省石家庄市050021

出　　处：《电网技术》2021年第4期1409-1416,共8页Power System Technology

摘　　要：针对传统无源滤波器占地面积大、容易与交流系统阻抗引发谐振等缺陷,提出一种适应于LCC-HVDC系统交流侧滤波的级联H桥混合型有源滤波器及控制策略,该混合型有源滤波器采用12/24次单调谐滤波器与基于级联H桥的有源滤波器直接串联的方案。然后,提出了电流控制器基于准比例谐振控制,兼顾滤波和动态无功补偿的协同控制策略。最后,基于电网阻抗和滤波器阻抗进行了系统稳定性分析,根据奈奎斯特稳定判据确定了避免系统发生谐振的控制延时范围。理论分析与仿真结果表明,该滤波器滤波效果良好,能够有效减少传统无源滤波器的占地面积,在控制延时范围内系统能够稳定运行。Due to the disadvantages of traditional passive power filters, such as large footprint and easy resonance with AC system impedance, this paper proposes a hybrid active power filter(HAPF) based on cascaded H-bridge and its control strategy for the AC side of LCC-HVDC system. The HAPF is composed of passive power filter and active power filter connected in series directly, where the passive power filter is 12 th-and 24 th-order single-tuned filter, and the active power filter is based on cascaded H-bridge. Then, a cooperative control strategy that takes into account both filtering and dynamic reactive power compensation is proposed, in which the current controller is based on quasi-proportional resonant controller. Finally, the stability of the system is analyzed based on the grid impedance and the filter impedance, and the control delay range to avoid the parallel resonance of the system is determined according to the Nyquist stability criterion. Theoretical analysis and simulation results show that the HAPF has good performance in filtering, can reduce the land requirement of the traditional passive filter significantly, and the system can operate stably within the control delay range.

关 键 词：LCC高压直流输电 混合型有源滤波器 无源滤波器 设备占地 系统稳定 

分 类 号：TM721[电气工程—电力系统及自动化]