电力系统自动化Issue(1)：104-108,120,6.DOI:10.7500/AEPS201212174
一种适用于模块化多电平换流器的新型环流控制器
A Novel Circulating Current Controller for Modular Multilevel Converter
摘要
Abstract
The system losses and working performance of the modular multilevel converter(MMC) are directly affected by the harmonics in the circulating current.The inherent relation between the AC-side current,the leg current and the circulating current is first directly derived,which reveals that there always exists double-frequency harmonics whether under balanced or unbalanced grid conditions.Then,a novel circulating controller based on proportional-integral-resonant (PIR) control is proposed for effectively suppressing the harmonics in the circulating current,without the double-frequency negative-sequence transformation and the phase decoupling control.A MMC-HVDC simulation of a two-station model containing the PIR is created based on PSCAD/EMTDC.Simulation results have verified the availability of the control strategy when compared to the results from the circulating controller under double fundamental-line frequency negative sequence rotational frame.关键词
模块化多电平换流器/环流/二倍频谐波/比例-积分-谐振(PIR)Key words
modular multilevel converter (MMC)/circulating current/double-frequency harmonics/proportional-integral-resonant(PIR)引用本文复制引用
阎发友,汤广福,贺之渊,孔明,马巍巍..一种适用于模块化多电平换流器的新型环流控制器[J].电力系统自动化,2014,(1):104-108,120,6.基金项目
国家自然科学基金资助项目(51177154)。 （51177154）
