Study of an Innovative Energy Storage SystemUsing New Secondary Battery Modules

本研究的目的是建立以最新锂离子电池模块与模块化多电平级联转换器相结合为特征的下一代环保型电池储能系统的核心技术。设计、建造和测试了额定电压为200V、功率为10kW、功率为20kWh的三相实验系统，验证和验证了蓄电池储能系统的工作原理和稳定性能。因此，线路(电源)电流的总谐波失真(THD)值完全符合日本的谐波准则。此外，通过计算机仿真，验证了所谓的“电压凹陷”在各种电压凹陷条件下的稳定渡越能力。

The aim of this research is to establish the core technology of the next-generation environment-friendly battery energy storage system that is characterized by combing the latest Li-ion battery modules with a modular multilevel cascade converter. The three-phase experimental system rated at 200 V, 10 kW, and 20 kWh was designed, constructed, and tested to confirm and justify the operating principles and stable performance of the battery energy storage system. As a result, a total harmonic distortion (THD) value of the line (supply) current complies completely with the Japanese harmonic guidelines. In addition, stable ride-through capability of the so-called “voltage sag” was confirmed by computer simulation under various voltage sag conditions.