摘要
制氢变换器的效率和输出纹波等指标在氢能应用中至关重要。多相交错并联Buck变换器(MPIBC)输出纹波的减小需要以增加并联支路、开关频率和滤波电感为代价,这将导致成本和损耗的提高。为此该文提出多相堆叠交错并联Buck变换器(MPSIBC),MPSIBC在MPIBC基础上增加纹波补偿并联支路。补偿支路采用具有补偿特性的PWM控制,输出交流电流与MPIBC输出电流纹波波形互补。MPSIBC利用输出补偿思想使得变换器输出纹波的消除不依赖开关频率等因素。该文从理论上对MPSIBC拓扑和纹波补偿原理进行了分析,并通过PSIM仿真和实验进行了验证,结果表明MPSIBC具有显著纹波抑制效果的同时可有效降低开关频率和滤波电感。
Efficiency and output ripple of hydrogen generation converters are critical metrics in hydrogen energy applications.Multi-phase interleaved Buck converter(MPIBC)suppresses the output ripple by increasing parallel branches,adopting the higher switching frequency,and adding filter inductance.However,that will lead to an increment in both costs and losses.To solve this deficiency,adding a ripple compensating shunt branch to MPIBC,a new topology,multi-phase stacked interleaved Buck converter(MPSIBC),is proposed in this paper.PWM control with the compensation characteristic is adopted in the compensation branch,in which the output AC current is complementary to the ripple of the MPIBC output current.The idea of output compensation is used to eliminate the output ripple of the converter without dependence on other factors,such as switching frequency.Based on the theoretical analysis of MPSIBC topology and the principle of ripple compensation,simulation on PSIM and physical experiments are established accordingly.Both the simulation and experimental results prove the ripple suppression capability of the proposed MPSIBC,with the reduction of the switching frequency and the inductance of the filters.By adding a capacitor to one of the branches in MPIBC,the function of that branch changes from the original power flow to ripple compensation.This paper refers to the branch as a ripple compensation branch,where the capacitor acts as a voltage divider and a DC blocker.The MPSIBC proposed in this paper is MPIBC with the ripple compensation branch,and its topology and control strategy is first described in detail.Different pulse width modulation signals control the ripple compensation branch and other branches in MPSIBC.The control result is that the compensation branch provides a path for the converter output ripple,thus preventing the ripple from output to the load.The parameter calculations for the converter are then illustrated.The switching frequency and inductance are chosen for continuous conduction mode,and the capacitan
作者
张理
韩民晓
范溢文
Zhang Li;Han Minxiao;Fan Yiwen(School of Electrical and Electronic Engineering North China Electric Power University,Beijing 102206 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2023年第2期485-495,共11页
Transactions of China Electrotechnical Society
基金
国家科技部重点研发资助项目(2018YFB0904700)。
关键词
制氢变换器
堆叠交错并联Buck
输出纹波
效率
Hydrogen generation converters
multi-phase stacked interleaved Buck
output ripple
efficiency
