南方电网技术2024，Vol.18Issue(5)：102-111,10.DOI:10.13648/j.cnki.issn1674-0629.2024.05.010
电压控制对构网型变换器频率响应特性影响分析
Analysis of the Impact of Voltage Control on the Frequency Response Characteristics of Grid-Forming Converter
摘要
Abstract
The virtual synchronous generator section of a grid-forming converter is the most important factor affecting its frequency dynamics,but the frequency of the internal voltage within a grid-forming converter does not only include the frequency of the virtual synchronous generator.To address this point of view,a research approach is proposed to characterize the effect of voltage control in influencing the frequency dynamics of grid-forming converter.Firstly,analogous to the frequency analysis method of the synchronous generator,the concept of the internal voltage of the grid-forming converter is proposed,and the frequency of the converter are characterized by the frequency of the internal voltage.Then the effect of the AC voltage control on the frequency dynamics in response to the active power perturbation within the electromechanical time scale is analyzed through the method of the motion equation modeling,and the influence trends of the voltage control parameter on the active power and the frequency response capability of the grid-forming converter are analyzed.It is found that larger voltage control proportional and integration parameters deteriorate the system frequency dynamics,but the response performance of the converter is mainly determined by the virtual synchronous generator.The simulations in MATLAB/Simulink with a 3-machine 9-node system and a real-world regional grid system verify the effectiveness of the method respectively.关键词
构网型变换器/虚拟同步机/交流电压控制/运动方程/频率响应/有功功率支撑Key words
grid-forming converter/virtual synchronous generator/AC voltage control/motion equation/frequency response/ac-tive power provision分类
动力与电气工程引用本文复制引用
黄伟,翟苏巍,路学刚,刘彦军,方一凡,何维,朱东海..电压控制对构网型变换器频率响应特性影响分析[J].南方电网技术,2024,18(5):102-111,10.基金项目
国家自然科学基金资助项目(52277180) （52277180）
中国南方电网有限责任公司创新项目(YNKJXM2022036). Supported by the National Natural Science Foundation of China(52277180) （YNKJXM2022036）
the Innovation Project of China Southern Grid Co.,Ltd.(YNKJXM2022036). （YNKJXM2022036）
