电力系统自动化2017，Vol.41Issue(4)：136-142,7.DOI:10.7500/AEPS20160706009
基于谐波线性化的模块化多电平换流器阻抗建模
Harmonic Linearization Based Impedance Modeling of Modular Multilevel Converters
摘要
Abstract
The small-signal impedance modeling of modular multilevel converters (MMCs) is the key for the resonance and stability analysis of MMC-based power systems.MMC is a converter system featuring multi-frequency,nonlinearity and periodically time-varying operation trajectory due to its complex internal dynamics.Hence,traditional small-signal methods cannot be directly applied to MMC.The AC-side small-signal impedance of MMC is modeled by the harmonic linearization method,which has taken into consideration the harmonic circulating current and capacitor voltage steady-state ripples.Furthermore,the influence of the circulating current control on the AC-side impedance of MMC is analyzed.A detailed timedomain simulation model of a three-phase MMC is built by using MATLAB/Simulink and the analytical models are validated by simulation results.关键词
模块化多电平换流器/阻抗/谐振/环流/谐波线性化Key words
modular multilevel converter (MMC)/impedance/resonance/circulating current/harmonic linearization引用本文复制引用
吕敬,蔡旭..基于谐波线性化的模块化多电平换流器阻抗建模[J].电力系统自动化,2017,41(4):136-142,7.基金项目
国家重点研发计划资助项目(2016YFB0900901) （2016YFB0900901）
上海市科委科研计划资助项目(16DZ1203402).This work is supported by National Key Research and Development Program of China (No.2016YFB0900901). （16DZ1203402）
