储能换流器VSG低电压穿越控制研究  

Research on VSG of Power Conversion System Based on Low Voltage Ride Through

作　　者：冯晓静 殷振峰 何凯琳 杨沛豪 FENG Xiao-jing;YIN Zhen-feng;HE Kai-lin;YANG Pei-hao(School of Information Engineering,Henan Agricultural Vocational College,Zhengzhou 451400,China;China Energy Construction Group Northwest Electric Power Test and Research Institute Co.,Ltd.,Xi'an 710054,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;Xi'an Thermal Power Research Institute Co.,Ltd.,Xi'an 710054,China)

机构地区：[1]河南农业职业学院信息工程学院,河南郑州451400 [2]中国能源建设集团西北电力试验研究院有限公司,陕西西安710054 [3]西安交通大学电气工程学院,陕西西安710049 [4]西安热工研究院有限公司,陕西西安710054

出　　处：《电力电子技术》2025年第2期64-67,共4页Power Electronics

基　　金：国家重点研发计划"973"项目(2022YFB24052-00);陕西省自然科学基础研究计划(2024JC-YBMS-419)。

摘　　要：为了使储能换流器(PCS)具备与同步发电机相同的旋转、励磁特性,采用虚拟同步机(VSG)控制策略,为了实现功率解耦,有功、无功电流独立控制,在VSG电压矢量计算环节引入虚拟阻抗,针对传统VSG不具备低电压穿越(LVRT)能力,无法抑制LVRT全过程稳态、暂态过流冲击,提出一种在电压跌落和电压恢复阶段加入不同虚拟阻抗的储能VSG控制方法。实验结果表明:将虚拟阻抗引入VSG控制系统,可以抑制LVRT全过程储能VSG输出过流,实现LVRT期间储能VSG控制系统对电压暂态支撑。In order to enable the power conversion system(PCS)to have the same rotation and excitation characteris-tics as a synchronous generator,a virtual synchronous generation(VSG)control strategy is adopted.In order to achieve power decoupling and independent control of active and reactive currents,virtual impedance is introduced in the VSG voltage vector calculation stage.In view of the fact that the traditional VSG does not have low voltage ride through(LVRT)capability and cannot suppress steady-state and transient overcurrent impacts throughout the entire LVRT pr-ocess,a control method for energy storage VSG with different virtual impedances added in the voltage drop and volt-age recovery stages is proposed.The experimental results show that introducing virtual impedance into the VSG control system can suppress the output overcurrent of the energy storage VSG throughout the LVRT process and achieve volt-age transient support of the energy storage VSG control system during LVRT.

关 键 词：储能换流器 虚拟同步机 低电压穿越能力 

分 类 号：TM46[电气工程—电器]