固态变压器中隔离双向DC/DC变换器扩展移相下虚拟电流控制策略
SOLID-STATE TRANSFORMER IN ISOLATED BIDIRECTIONAL DC/DC CONVERTER EXTENDED UNDER PHASE SHIFT VIRTUAL CURRENT CONTROL STRATEGY
郑征 1靳婷婷 1陶海军 1黄涛2
作者信息
- 1. 河南理工大学电气工程与自动化学院,焦作 454000
- 2. 都灵理工大学能源系,都灵 10129
- 折叠
摘要
该文以固态变压器后级隔离双向DC/DC变换器为重点研究对象,提出一种扩展移相下虚拟电流控制策略.通过分析后级变换器在扩展移相传输功率下相移量关系以获得最小电流应力最优解来提高变换器的传输效率,减少器件损耗.同时通过虚拟电流控制思想在线估算传输功率来提高系统动态响应性能,减少电流传感器使用.最后,对该文所提出的扩展移相下虚拟电流控制与扩展移相控制进行实验对比分析,验证了扩展移相下虚拟电流控制策略具有降低电流应力,显著提高变换器的动态响应的优点.
Abstract
In this paper,a virtual current control strategy under extended phase shift is proposed,which focuses on the isolated bidirectional DC/DC converter of solid-state transformer.By analyzing the phase shift relationship of the post-stage converter under the extended phase shift transmission power,the optimal solution of the minimum current stress is obtained to improve the transmission efficiency of the converter and reduce the device loss.At the same time,the virtual current control idea is used to estimate the transmission power online to improve the dynamic response performance of the system and reduce the use of current sensors.Finally,the experimental comparison between the virtual current control and the extended phase shift control under the extended phase shift is carried out.It is verified that the virtual current control strategy under the extended phase shift has the advantages of reducing the current stress and significantly improving the dynamic response of the converter.
关键词
固态变压器/能源互联网/隔离双向DC/DC变换器/电流应力/扩展移相下虚拟电流控制Key words
solid state transformer/energy internet/isolated bidirectional DC/DC converter/current stress/virtual current control with extended phase shift引用本文复制引用
基金项目
国家自然科学基金(61703144)
河南省科技攻关计划项目(192102210228)
出版年
2024
NETL
NSTL
维普
万方数据