跟网型和构网型变流器动态交互特性分析
Dynamic Interaction Control Characteristic Analysis of Grid-following and Grid-forming Inverters
阮亮 1王杨 1肖先勇 1王海风 1徐群伟 2贾楚蕴3
作者信息
- 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
- 折叠
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.
Abstract
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Key words
grid-following control/grid-forming control/hybrid systems/control loop interaction引用本文复制引用
基金项目
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)
出版年
2024
NETL
NSTL
万方数据