Hybrid Modular Multilevel Rectifier: A New High-Efficient High-Performance Rectifier Topology for HVDC Power Delivery
Hybrid Modular Multilevel Rectifier: A New High-Efficient High-Performance Rectifier Topology for HVDC Power Delivery
复制标题
DOI：
10.1109/tpel.2021.3051959
复制
发表时间：
2021-01
影响因子：
6.7
通讯作者：
Jian Liu;D. Dong;Di Zhang
中科院分区：
文献类型：
--
作者：
Jian Liu;D. Dong;Di Zhang
这封信提出了一种新的三相整流器拓扑结构，即混合模块化多电平整流器（HMMR）中或高压AC-DC功率转换应用。与模块化多电平变换器（MMC）相比，高达50%的IGBT和包括电容器的子模块（SM）可以被简单高效的高压工频二极管堆取代。HMMR可以保持MMC的关键优势，如模块化，可靠性和出色的谐波性能，同时显着降低功耗，成本和体积。与基于晶闸管的线路换向换流器（LCC）整流器不同，HMMR可以在不同的电网条件下运行，甚至可以提供无功功率支持，使其成为点对点中压和高压电力输送的整流器单元的强有力候选者。仿真和实验结果验证了该变换器的可行性。
This letter presents a novel three-phase rectifier topology, namely hybrid modular multilevel rectifier (HMMR) for medium or high voltage ac–dc power conversion applications. Compared with modular multilevel converter (MMC), up to 50% of the IGBTs and submodules (SMs) including capacitors can be replaced by simple high-efficient high-voltage line-frequency diode stacks. HMMR can keep the key benefits of MMC, such as modularity, reliability, and excellent harmonic performance, while significantly reducing the power losses, costs, and volume. Unlike the thyristor-based line-commutated converter (LCC) rectifier, HMMR can operate under different grid conditions and can even provide reactive power support, making it a strong candidate of rectifier unit for point-to-point MV and HV power delivery. The feasibility of proposed converter is verified by the simulation as well as experimental results.