摘要
Z源变换器具有单级升压、降压、无死区、电压畸变小、可靠性高等优点,在电动汽车领域具有广阔的前景。提出一种基于Z源变换器的电动汽车超级电容-电池混合储能系统。该结构将储能与驱动系统相融合,减少了电池功率变换器,降低了损耗与成本。详细分析通过Z源变换器实现混合储能系统不同模式下功率分配的运行机理。此基础上提出功率分频协调控制策略以提高混合储能系统的响应速度并实现各模式的无缝切换。最后,为了避免短时尺度冲击电流对电池的影响,设计电池瞬态峰值电流估计方法。仿真与实验结果验证了所提出的混合储能系统及控制策略的有效性。
The Z-source converter features stepping up/down in single stage,none dead-time andhigh reliability,which attaches great significance to electric vehicles(EV).An ultra capacitor-batteryhybrid energy storage system(HESS)for electric vehicles is proposed based on bi-directional Z-sourcetopology.The HESS is incorporated in the traction inverter system,and the DC-DC converter for thebattery is omitted.The steady operation principles for power distribution in HESS modes are analyzed.A frequency dividing coordinated control is then employed to enhance the system dynamic responseand the seamless switching.Estimation methods for the battery peak current are also investigated,toavoid the impacts of short-time inrush current on battery.Finally,the steady performance and transientresponse are verified by simulation and experimental results.
作者
胡斯登
梁梓鹏
范栋琦
周晶
何湘宁
Hu Sideng;Liang Zipeng;Fan Dongqi;Zhou Jing;He Xiangning(College of Electrical Engineering Zhejiang University Hangzhou 310027 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2017年第8期247-255,共9页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51407159)
台达环境与教育基金会<电力电子科教发展计划>(DREG2016011)资助项目
关键词
Z源变换器
电动汽车
混合储能
频率协调控制
Z-source converter
electric vehicle
hybrid energy storage
frequency dividing coordinated control
