Stability Comparison Between Grid-forming and Grid-following Based Wind Farms Integrated MMC-HVDC  

作　　者：Rongcai Pan Dong Liu Shan Liu Jie Yang Longze Kou Guangfu Tang 

机构地区：[1]China Electric Power Research Institute,Beijing 100192,China,and he is also with the State Key Laboratory of Advanced Power Transmission Technology and Beijing Key Laboratory of DC Grid Technology&Simulation,Beijing 102209,China [2]State Key Laboratory of Advanced Power Transmission Technology and Beijing Key Laboratory of DC Grid Technology&Simulation,Beijing 102209,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2023年第4期1341-1355,共15页现代电力系统与清洁能源学报（英文）

基　　金：supported by National Key R&D Program of China(No.2020YFB1506600)。

摘　　要：Grid-forming(GFM)control based high-voltage DC(HVDC)systems and renewable energy sources(RESs)provide support for enhancing the stability of power systems.However,the interaction and coordination of frequency support between the GFM-based modular multilevel converter based HVDC(MMC-HVDC)and grid-following(GFL)based RESs or GFM-based RESs have not been fully investigated,which are examined in this study.First,the detailed AC-and DC-side impedances of GFM-based MMC-HVDC are analyzed.The impedance characteristics of GFL-and GFM-based wind turbines are next analyzed.Then,the influences of GFL-and GFM-based wind farms(WFs)on the DC-and AC-side stabilities of WF-integrated MMC-HVDC systems are compared and evaluated.The results show that the GFM-based wind turbine performs better than the GFL-based wind turbine.Accordingly,to support a receiving-end AC system,the corresponding frequency supporting strategies are proposed based on the GFM control for WF-integrated MMC-HVDC systems.The GFM-based WF outperforms the GFL-based WF in terms of stability and response time.Simulations in PSCAD/EMTDC demonstrate the DC-and AC-side stability issues and seamless grid support from the RESs,i.e.,WFs,to the receiving-end AC system.

关 键 词：Renewable energy source(RES) modular multilevel converter(MMC) wind farm grid-forming(GFM) highvoltage direct current 

分 类 号：TM614[电气工程—电力系统及自动化] TM712