基于DSIM仿真的多端口电力电子变压器损耗分析

Loss analyses of multi-port power electronic transformers based on DSIM simulations

多端口电力电子变压器正成为新一代电网的关键设备,但其损耗建模和解算非常困难。DSIM软件适用于复杂结构电力电子变换器仿真解算,尤其是电力电子变压器。针对多端口电力电子变压器,该文进行了比较全面的损耗分析,并且例证了DSIM软件在复杂电力电子变换器系统损耗分析方面的有效性。建立了电力电子变压器损耗模型,通过仿真和实验验证了所提出的模型的准确性和有效性。结果表明:单台电力电子变压器具有最优效率点;对于两台电力电子变压器集群运行,轻载时只运行单台电力电子变压器效率最优,重载时两台电力电子变压器同时运行效率最优。该文对损耗模型的分析,可以为电力电子变压器运行效率优化提供参考。

Multi-port power electronic transformers(PET)are key parts of modern power grids,but their losses are difficult to model.DSIM simulations are useful for complex power electronic converters,especially PET simulations.This study analyzed the losses in a multi-port PET which showed the effectiveness of DSIM software for analyzing complex power electronic converter systems.This paper described the PET loss model which was then validated by simulations and experiments.The results show the optimum efficiency operating point of a single PET.When two PETs are available,one PET in operation is the most efficient for light loads and two PETs in operation are the most efficient for heavy loads.This loss model analysis provides a reference for optimizing the efficiency of PET operations.