摘要
为解决传统锁相环(Phase-locked loop,PLL)控制在弱电网和高功率输出条件下响应迟缓、稳定性不足的问题,针对基于虚拟感应电机(Virtual induction machine,VIM)控制的风电并网运行新技术展开分析。VIM控制通过模拟感应电机的自同步特性,实现了无PLL的自同步功能,提升了系统的动态响应速度和鲁棒性。通过构建状态空间模型并利用模态分析,定量对比了VIM控制与PLL控制在风电并网系统中的性能,结果显示VIM控制的主导模态阻尼比高于PLL控制,动态响应更快。此外,通过分析短路比和有功出力对稳定性的影响,验证了VIM控制在弱电网和高功率输出条件下的优越鲁棒性,并通过参数优化进一步提升了系统性能。研究表明,VIM控制为风电并网系统在弱电网和高出力场景提供了更稳定、可靠的方案。
To address the issues of slow response and insufficient stability of traditional phase-locked loop(PLL)control under weak grid and high power output conditions,a new technology is investigated for wind power grid-connected operation based on virtual induction machine(VIM)control.VIM control achieves self-synchronization without PLL by emulating the self-synchronizing characteristics of induction machines,thereby enhancing the system’s dynamic response speed and robustness.By constructing a state-space model and employing modal analysis,the performances of VIM control and PLL control in wind power grid-connected systems are quantitatively compared.The results show that VIM control exhibits a higher dominant modal damping ratio and a faster dynamic response compared to PLL control.Furthermore,by analyzing the effects of short-circuit ratio and active power output on stability,the superior robustness of VIM control under weak grid and high active power output conditions is verified.Additionally,parameter optimization further enhances the system performance.The study demonstrates that VIM control provides a more stable and reliable solution for wind power grid-connected systems in weak grid and high output scenarios.
作者
杨冬晨
周泓宇
韦善阳
李鸿彪
姚伟
YANG Dongchen;ZHOU Hongyu;WEI Shanyang;LI Hongbiao;YAO Wei(National Key Laboratory of Strong Electromagnetic Technology,Huazhong University of Science and Technology,Wuhan 430074;Shanghai KeiLiang Information Technology Co.,Ltd.,Shanghai 201103)
出处
《电气工程学报》
北大核心
2025年第4期330-342,共13页
Journal of Electrical Engineering
基金
国家自然科学基金资助项目(U22B20111,523B2074)。
关键词
虚拟感应电机
风电并网
锁相环
小信号分析
参与因子分析
Virtual induction machine
wind power grid integration
phase-locked loop
small-signal analysis
participation factor analysis
