一种用于并联组合直流变换器的均流策略  

A Current-sharing Strategy in Input-parallel Output-parallel DC/DC Converter

作　　者：韩军[1] 

机构地区：[1]国网新疆电力公司疆南供电公司,新疆图木舒克844000

出　　处：《电力电子技术》2017年第4期114-117,共4页Power Electronics

摘　　要：为了解决组合直流变换器中由于各相模块参数不匹配所导致的电流不均衡问题、提出了一种用于两相输入并联输出并联(IPOP)组合直流变换器的均流策略。该策略利用数字控制技术,测算两相参数不匹配度并对之进行补偿,在不使用电流传感器的情况下,实现两相模块间均流。IPOP组合直流变换器的基本模块选用双有源桥(DAB)DC/DC变换器。搭建了两相IPOP组合直流变换器的仿真模型和实验样机,仿真和实验结果表明,采用提出的均流策略可实现两相模块间的理想均流,验证了所提控制策略的有效性。In order to solve the existing problem of current imbalance caused by parameter mismatches among phases, a novel current-sharing strategy for two-phase input-parallel output-parallel （IPOP） DC/DC converter is introduced.By using digital control technology, this strategy can estimate the parameter mismatch between phases then compensate it, thus achieving current sharing without extra current sensors.A dual active bridge （DAB） DC/DC converter is chosen as the basic module.Simulation model and experimental prototype of a two-phase /POP DC/DC converter are built, simulation and experimental results indicate that with the proposed strategy, current sharing is achieved ideally, and the effectively of the proposed strategy is verified.

关 键 词：变换器 均流策略 双有源桥 

分 类 号：TM46[电气工程—电器]