四川轻化工大学学报（自然科学版）2024，Vol.37Issue(3)：51-58,8.DOI:10.11863/j.suse.2024.03.07
基于改进扩展移相的双向DC-DC变换器控制策略
Control Strategy for Bidirectional DC-DC Converter Based on Improved Extended Phase Shift
摘要
Abstract
To achieve bidirectional control of the active power of the system and keep the stability of the DC bus voltage on the secondary side at the same time,the disturbances of the Power Electronic Transformer(PET)secondary bus that could affect the performance of other ports of PET is minimized.The operating mode and backflow power of the Dual-Active-Bridge(DAB)bidirectional DC-DC converter under the improved Extended Phase Shift(EPS)control is analyzed and the control point for zero reflux power region within the control region is designed.With the aim of system power balance,a power balance control strategy is investigated,which introduces the inverter power into the DAB converter to reduce the voltage fluctuation on the DAB secondary side.Under the improved extended phase shift control,when the system load power changes from 0 kW to 15 kW,the maximum variation of the secondary bus voltage is approximately 30 V,within a steady-state transition time of about 10 ms.When the system load power changes from 15 kW to 10 kW,the secondary bus voltage remains essentially unchanged.In the event of a sudden change in the primary bus voltage,there is no obvious fluctuation observed in the secondary bus voltage.关键词
双有源桥/电力电子变压器/扩展移相/功率平衡/零回流区域Key words
dual-active-bridge/power electronic transformer/extended phase shift/power balance/zero reflux power region分类
信息技术与安全科学引用本文复制引用
戴前程,张春,罗苏明,李浩宇..基于改进扩展移相的双向DC-DC变换器控制策略[J].四川轻化工大学学报（自然科学版）,2024,37(3):51-58,8.基金项目
安徽省高校自然科学研究重大项目(KJ2015ZD06) （KJ2015ZD06）
安徽省大学生创新创业训练计划项目(S202210363200) （S202210363200）
