跟网型和构网型变流器动态交互特性分析  

Dynamic Interaction Control Characteristic Analysis of Gridfollowing and Grid-forming Inverters

作　　者：阮亮 王杨 肖先勇[1] 王海风 徐群伟 贾楚蕴 RUAN Liang;WANG Yang;XIAO Xianyong;WANG Haifeng;XU Qunwei;JIA Chuyun(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,China;State Grid Chengdu Power Supply Company,Chengdu 610095,China)

机构地区：[1]四川大学电气工程学院,四川成都610065 [2]国网浙江省电力有限公司电力科学研究院,浙江杭州310014 [3]国网成都供电公司,四川成都610095

出　　处：《智慧电力》2024年第7期103-110,共8页Smart Power

基　　金：国家自然科学基金资助项目(52177104);国网浙江省电力有限公司科技项目(B311DS23000L)。

摘　　要：构网型和跟网型变流器2种控制模式具有显著差异,互联场景下系统的稳定机理尚未得到有效揭示。为此,分析了2种变流器内部控制回路的交互机理,旨在揭示互联系统的动态特性。首先,分析了变流器内部控制回路和外部阻抗特性的关系,将整体阻抗分解为环路的等效子阻抗。然后,通过灵敏度分析,定位了不同场景下影响系统稳定性的关键控制回路。基于主导回路分析,研究了关键控制回路间的交互机理。最后,通过时域仿真验证了结果的准确性。There are significant differences between the control modes of the grid-following converter and the grid-forming converter.The system stability mechanism in the interconnected scenario has not been effectively revealed.The interaction mechanism between the internal control loops in the hybrid system is analyzed to reavel the dynamic characteristic of interconnected.Firstly,the relationship between the internal control loop and the external impedance characteristics of the converter is analyzed,and the overall impedance is decomposed into the equivalent sub-impedance of the loop.Then,through sensitivity analysis,the key control loops that affect the stability of the system in different scenarios are located.Based on the analysis of the dominant loop,the interaction mechanism between the key control loops is studied.Finally,the accuracy of the results is verified through time-domain simulation.

关 键 词：跟网型控制 构网型控制 互联系统 控制回路交互 

分 类 号：TM712[电气工程—电力系统及自动化]