电力系统保护与控制2025，Vol.53Issue(14)：69-79,11.DOI:10.19783/j.cnki.pspc.240856
高渗透率下计及并网逆变器动态性能的新型锁相环设计方法及鲁棒性分析
Design method and robustness analysis of a novel phase-locked loop considering the dynamic performance of grid-connected inverters under high penetration
摘要
Abstract
To address the issue of system stability and dynamic performance degradation caused by the coupling between the output impedance of grid-connected inverters and grid impedance under high renewable energy penetration,a novel phase-locked loop(PLL)design method is proposed based on feedforward compensation from the perspective of optimizing PLL control structure.First,the output impedance model of the grid-connected inverter considering the influence of the PLL is established.Based on this model,the characteristics of traditional PLL and inertia-based PLL are analyzed.The results reveal that both types exhibit deteriorated dynamic and steady-state performance under weak grid conditions when subjected to grid disturbances.To solve the aforementioned issue,a small-signal model for the novel PLL structure based on feedforward compensation is derived through appropriate pole-zero placement of the closed-loop system.A parameter design method is provided,and a detailed analysis of the system's performance is conducted.The analysis indicates that the proposed novel PLL enhances system robustness while providing additional inertia and damping,effectively addressing the system stability and dynamic performance degradation issue caused by PLL under weak grid conditions.Finally,the effectiveness of the proposed novel PLL design is validated through hardware-in-the-loop(HIL)experiments using RT-LAB.关键词
高渗透率/并网逆变器/新型锁相环/零极点配置/鲁棒性Key words
high penetration/grid-connected inverter/novel phase locked loop/zero-pole configuration/robustness引用本文复制引用
屈克庆,高畅,许跃成,赵晋斌,毛玲,曾志伟..高渗透率下计及并网逆变器动态性能的新型锁相环设计方法及鲁棒性分析[J].电力系统保护与控制,2025,53(14):69-79,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.52177184). 国家自然科学基金项目资助(52177184) （No.52177184）
