电力系统保护与控制2026，Vol.54Issue(15)：48-59,12.DOI:10.19783/j.cnki.pspc.260044
非对称级联H桥逆变器通用倍频调制与功率均衡方案推广
Generalized frequency-doubling modulation and power balancing scheme for asymmetric cascaded H-bridge inverters
摘要
Abstract
Asymmetric cascaded H-bridge inverters adopting hybrid carrier level-shifted or phase-shifted modulation cannot simultaneously achieve excellent harmonic performance and solve power imbalance issues.To address this limitation,a generalized improved hybrid frequency-doubling modulation and power balancing control scheme is proposed for a class of asymmetric cascaded H-bridge inverters with input voltage ratios of 1:1:…:1:k:k:…:k.The proposed modulation scheme achieves output power balance in the low-voltage H-bridge by re-arranging the spatial positions of the triangular carrier wave and combining phase-shifting techniques.The output voltage waveform of the high-voltage H-bridge is dynamically controlled based on the level-rotating and shifting strategy,ensuring power balancing among individual units in a single high-voltage H-bridge configuration and among same-voltage units in multiple high-voltage H-bridge configurations.The proposed modulation scheme not only doubles the average equivalent switching frequency of the inverter,but also achieves power balancing without inducing power backflow.Moreover,a unified generalized modulation model is established for this class of expandable H-bridge structures.Simulation and experimental results verify the accuracy,feasibility,and generalizability of the proposed scheme.关键词
非对称级联H桥逆变器/改进型混合倍频调制/功率均衡/功率倒灌/谐波特性/通用推广Key words
asymmetric cascaded H-bridge inverter/improved hybrid frequency doubling modulation/power balancing/power backflow/harmonic characteristic/general applicability引用本文复制引用
胡文华,周金锋,唐小兵,张鹏健,陈翔..非对称级联H桥逆变器通用倍频调制与功率均衡方案推广[J].电力系统保护与控制,2026,54(15):48-59,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.52367020). 国家自然科学基金项目资助(52367020) （No.52367020）
江西省自然科学基金重点项目资助(20232ACB204024) （20232ACB204024）
