一种多电平功率解耦电路优化设计方法及控制策略研究
Study on Optimal Design and Control for a Multilevel Active Power Decoupling Circuit
张飞力 1张军明1
作者信息
摘要
单相高功率因素变换器电路包括AC/DC和DC/AC电路,会在直流母线上产生二倍频(2ω)电流分量,需庞大的直流母线电容来减小低频纹波.传统的两电平主动功率解耦电路可有效吸收二倍频电流分量,但电路中电感体积依然较大,提出了一种多电平有源解耦电路的优化设计方法,在满足预期损耗的前提下实现体积最小化.基于飞跨电容多电平拓扑,提出了一种降低谐波含量和平衡飞跨电容电压的控制策略,搭建了单相飞跨电容七电平半桥仿真电路,并对所提优化设计方法和控制策略进行了仿真验证.
Abstract
In single-phase high power-factor applications,including AC/DC and DC/AC converters,there can be generated high double line frequency current ripple in the DC bus,and large capacitance are required to absorb this low-frequency ripple.Though conventional two-level active power decoupling(APD)circuit can effectively absorb this ripple,the inductor size is still large.This paper proposes an optimal design method for multi-level APD circuit,which can mini-mize volume with a given power loss expectation.Based on flying-capacitor multilevel(FCML)topology,a control strate-gy that can limit harmonic content and balance voltage of flying-capacitors is proposed.A 7-L half-bridge circuit are simu-lated to verify the proposed design method and the control strategy.
关键词
飞跨电容多电平变换器/主动功率解耦/低频纹波Key words
FCML converter/active power decoupling/low-frequency ripple引用本文复制引用
出版年
2024
NETL
NSTL
万方数据