摘要
针对构网型静止无功发生器(SVG)采用虚拟阻抗与虚拟导纳控制时的异同,基于谐波状态空间方法建立SVG阻抗模型,分析其小信号稳定性,并通过仿真平台完成扫频验证。通过推导内环传递函数分析两种控制的相似等效条件,同时从小信号稳定性方面分析两种控制下构网型SVG的阻抗差异,以及对不同电网强度的适应性。最后,基于稳定性分析结果设计虚拟阻抗和虚拟导纳的取值。基于两种控制的差异,进一步对虚拟阻抗控制进行优化,提高虚拟阻抗控制在强电网下的稳定性。最后,基于RTLAB平台搭建硬件在环实验,验证本文理论分析和优化方法有效性。
This paper conducts a comparative study on virtual impedance and virtual admittance control strategies for grid⁃forming static var generators(SVGs).An SVG impedance model is established using the harmonic state⁃space(HSS)method to analyze small⁃signal stability,with frequency scanning validation implemented through a simulation platform.By deriving the inner⁃loop transfer functions,similar equivalence conditions between the two control strategies are identified.The impedance differences of grid⁃forming SVGs under both control methods are systematically investigated from a small⁃signal stability perspective,along with their adaptability to varying grid strength conditions.Based on the stability analysis results,parameter design principles for virtual impedance and admittance are proposed.Furthermore,leveraging the fundamental differences between the two strategies,the virtu⁃al impedance control method is optimized to enhance its stability in strong grid scenarios.Finally,a hardware⁃in⁃the⁃loop(HIL)experiment is conducted on the RT⁃LAB platform to validate the effectiveness of the theoretical a⁃nalysis and optimization method proposed in this study.
作者
张东晖
隋岩君
胡晓虎
王耀函
郇政林
熊小玲
赵成勇
ZHANG Donghui;SUI Yanjun;HU Xiaohu;WANG Yaohan;HUAN Zhenglin;XIONG Xiaoling;ZHAO Chengyong(State Grid Jibei Zhangjiakou Wind-Solar-Storage-Transmission New Energy Co.,Ltd.,Zhangjiakou 075000,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Beijing 102206,China;Electric Power Research Institute of State Grid Jibei Electric Power Co.,Ltd.,Beijing 100045,China)
出处
《电工电能新技术》
北大核心
2025年第11期97-108,共12页
Advanced Technology of Electrical Engineering and Energy
基金
国网冀北电力有限公司科技项目(B3018K24006A)。
