基于新型混合多电平变换器的车载供电系统  

Vehicle Power Supply System Based on a Novel Hybrid Multi-level Converter

作　　者：武国梁 WU Guo-liang(China Railway Construction Electrification Bureau Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]中国铁建电气化局集团有限公司,北京100043

出　　处：《电力电子技术》2024年第4期68-71,共4页Power Electronics

基　　金：国家重点研发计划(2021YFB2600400)

摘　　要：采用蓄电池和超级电容的储能单元是车载供电-驱动系统中的重要部分。此处提出了一种新型的混合级联型多电平充放电电路拓扑结构,储能单元的连接方式不再是传统的直接串并联,而是由每个桥臂单独控制储能单元后进行级联。将传统的均压电路和充放电控制电路合并为一个电路。由于每个储能单元是独立控制的,所以能够实时实现电压均衡,既能保护储能单元,也能提高储能单元的利用率。该电路拓扑输出为多电平电压,可以减小逆变器输出的电压变化率对电机绝缘的影响,并且谐波含量少,提高控制性能。分析了电路拓扑控制策略,并以铅酸蓄电池为例进行了实验,实验结果验证了该新型储能系统拓扑的合理性和优越性。Power storage unit composed of batteries and super-capacitors is an important part of the vehicle powered drive system.A novel hybrid cascaded multi-level charge and discharge circuit topological structure is proposed,the connection mode of power storage units is no longer the traditional direct series and parallel,but each bridge arm separately controls the power storage units and then cascades them.The traditional voltage balancing circuit and charge and discharge control circuit are combined into one circuit.Since each power storage unit is controlled separately,the voltage balance can be realized on-time,it can not only protect the power storage unit,but also improve the utilization rate of the power storage unit.The circuit topology output is multi-level voltage,which can reduce the influence of inverter output voltage change rate on the motor insulation,and harmonic content is less,the control performance is improved.The circuit topology control strategy is analyzed,and lead-acid battery is taken as an example,the experimental results verify the rationality and superiority of the novel power storage system topology.

关 键 词：多电平变换器 车载供电-驱动 储能单元 

分 类 号：TM46[电气工程—电器]