中国电机工程学报2024，Vol.44Issue(15)：6035-6046,中插16,13.DOI:10.13334/j.0258-8013.pcsee.230024
锁相环主导下变流器振荡问题的阻抗分析方法:标称性与鲁棒性
Impedance Analysis Method of Oscillation Issues in Converter Caused by Phase-locked Loop:Nominal Performance and Robustness
摘要
Abstract
There are many impedance-based methods for analyzing oscillation of a grid-connected converter system(GCS)via dq frame,sequence frame and polar frame,which can be transformed into each other and are equivalent in assessing the stability of the system.However,the discrepancy and adaptation of these methods have not been discussed theoretically.Therefore,the impedance models of GCS are established in above three kinds of coordinates respectively.Then,the mathematical and physical characteristics of them are analyzed.Next,the decoupling of impedance models in different frames is analyzed,and the differences of the impedance criteria in stability analysis and mechanism interpretation are given.Furthermore,the sub-synchronous oscillation caused by the phase-locked loop considering the converter's four quadrant operation scenario are illustrated.The existence of open-loop transfer function right-half-plane poles and its sensitivity to uncertain parameters are analyzed,focusing on the nominal performance and robustness of the impedance criteria.On this basis,the adaptation of several impedance criteria of GCS is analyzed.Theoretical analysis and simulations confirm the validity of the proposed conclusion.关键词
阻抗判据/新能源/功率因数/鲁棒性/标称性Key words
impedance-based stability criterion/renewable energy/power factor/robustness/nominal performance分类
信息技术与安全科学引用本文复制引用
艾力西尔·亚尔买买提,辛焕海,宫泽旭,马富艺龙,袁辉..锁相环主导下变流器振荡问题的阻抗分析方法:标称性与鲁棒性[J].中国电机工程学报,2024,44(15):6035-6046,中插16,13.基金项目
国家自然科学基金项目(U2166204,U22B6008,52207140). Project Supported by National Natural Science Foundation of China(U2166204,U22B6008,52207140). （U2166204,U22B6008,52207140）
