浙江电力2025，Vol.44Issue(7)：82-92,11.DOI:10.19585/j.zjdl.202507009
考虑电容电压纹波抑制的MMC最优降损控制策略
An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression
摘要
Abstract
Existing capacitor voltage ripple suppression methods primarily rely on second-harmonic circulating cur-rent injection(SHCCI).However,these methods often increase valve losses in modular multilevel converters(MMCs),degrading operational efficiency and reliability.To address this challenge,this paper first analyzes the capacitor voltage ripple characteristics of MMCs under optimal SHCCI and reveals the additional converter valve losses incurred by ripple suppression.For medium-and low-voltage MMCs employing carrier phase shift pulse width modulation(CPS-PWM),a loss-reduction control strategy is proposed that explicitly considers capacitor voltage ripple suppression.Based on the optimization objectives and constraints of capacitor voltage ripple and valve loss,the bridge arm current is optimally controlled to eliminate the valve loss increment induced by ripple suppression while maintaining ripple suppression performance.Finally,a comparative analysis under multiple operating condi-tions is performed in MATLAB/Simulink to validate the accuracy of the valve loss characteristic analysis and the ef-fectiveness of the proposed control strategy.关键词
模块化多电平换流器/电容电压纹波抑制/二倍频环流/降损控制策略Key words
MMC/capacitor voltage ripple suppression/SHCCI/loss-reduction control strategy引用本文复制引用
方东平,丘扬,崔金栋,费立松,唐芳杰,赵建成..考虑电容电压纹波抑制的MMC最优降损控制策略[J].浙江电力,2025,44(7):82-92,11.基金项目
吉林省科技发展项目(242735XM0103119704) （242735XM0103119704）
浙江大有集团有限公司科技项目(DY2023-23) （DY2023-23）
