A Novel Bidirectional Three-Level LCL-T Resonant Converter Applied to Onboard ESHS Based on Quasi-Constant-Current
A Novel Bidirectional Three-Level LCL-T Resonant Converter Applied to Onboard ESHS Based on Quasi-Constant-Current
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DOI：
10.1109/tte.2023.3298507
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发表时间：
2024-06
影响因子：
7
通讯作者：
Zhongyi Zhang;Xiangyang Dai;Wei You;Xiaosen Xiao;Zhiwei Kang;Tao Jin
中科院分区：
文献类型：
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作者：
Zhongyi Zhang;Xiangyang Dai;Wei You;Xiaosen Xiao;Zhiwei Kang;Tao Jin
为了向车载储能混合动力系统(ESHS)普及恒流充电，以及对更高电压和更大电流的要求。将电感-电容-电感-T型结构(LCL-T)谐振与三电平级联中点钳位有源电桥(3L-CNPC)相结合，提出了一种适用于车载EHS的准恒流(QCC)双向三电平电感-电容-电感-T型结构(LCL-T)谐振转换器。3L-CNPC的每个子NPC臂可以单独工作，也可以与耦合变压器串联工作，采用耦合变压器设计不同的调制方法来控制谐振器模块(RTM)的输入电压，该模块可以建立一次和两次QCC模式。而通过对RTM参数的对称设计，实现了双向统一功率传输的特性，使得LCL-T谐振QCC输出开环配置仅依赖于${f}_{mathm{n}}$和${q}$。此外，在无功控制和实现开关零电压切换的情况下，设计了一种获得满足QCC给定判断准则的运行频率的QCC方法。最后，仿真和样机实验都证明了所提出的转换器在每种模式下几乎都实现了QCC输出。
For the popularization of constant-current charging to onboard energy storage hybrid systems (ESHS) and requirements of higher voltage and higher current. A novel bidirectional three-level inductor-capacitor-inductor-T type structure (LCL-T) resonant converter applied to onboard ESHS based on quasi-constant-current (QCC) is proposed by combining the LCL-T resonance with the three-level cascaded neutral-point clamped active bridges (3L-CNPC). Each sub-NPC-arm of 3L-CNPC can work solely or in tandem with a coupling transformer, which is adopted to design different modulation methods to control the input voltage of the resonant tank module (RTM) that can establish once and double QCC modes. While a characteristic of unified power transmission in two-way is achieved by a symmetrical design of the RTM parameters that can access an LCL-T resonant QCC output open-loop configuration only depended on ${f} _{\mathrm {n}}$ and ${Q}$ . Besides, an approach to QCC for getting operating frequency ${f} _{\mathrm {s}}$ that meets the restricted given judgment criteria of QCC is designed under reactive power control and realizing ZVS of switches. At last, the simulations and prototype experiments both prove that the proposed converter almost implements the QCC output within judgment criteria in each mode.