研究三级双活桥直流-直流转换器模型预测控制策略的研究
Junrui Wang1, Lu Tan2, Jin Li2
1School of Electrical Information Engineering, North Minzu University, Yinchuan, China. jr09110111@163.com.
Scientific reports
|March 28, 2025
概括
一个新的模型预测控制策略使三级双活桥 (DAB) DC-DC转换器中的零电压切换 (ZVS) 成为可能. 这种方法增强了动态响应,并减少了切换损失,即使在负载变化下.
科学领域:
- 电气工程 电气工程
- 电力电子 电力电子 电力电子
- 控制系统 控制系统
背景情况:
- 中点三级双活跃桥 (DAB) DC-DC转换器对于高效的功率转换至关重要.
- 实现零电压开关 (ZVS) 对于最小化开关损失和提高转换器效率至关重要.
- 现有的控制策略可能会在快速动态响应和在不同的负载条件下维持ZVS方面扎.
研究的目的:
- 提出一种模型预测控制 (MPC) 策略,用于在三级DAB直流-直流转换器中实现零电压切换 (ZVS).
- 分析开关传导模式,并推导单相位移 (SPS) 调制下的所有开关的ZVS条件.
- 为了提高动态响应并减少三级DAB转换器的切换损失.
主要方法:
- 在三级DAB转换器的不同切换模式中分析电感器电流工作条件.
- 在单相变换 (SPS) 调制下所有开关的零电压开启范围的导出.
- 建立每个模式的空间状态方程,并实施使用成本函数快速响应的离散预测控制策略.
主要成果:
- 拟议的MPC战略成功实现了三级DAB转换器中所有切换元件的零电压切换 (ZVS).
- 模拟结果表明,在负载突变条件下,输出电压的快速稳定.
- 该策略有效地减少了切换损失,并提高了系统的动态响应能力.
结论:
- 开发的模型预测控制策略对于实现三级DAB直流-直流转换器中ZVS是有效的.
- 该战略在动态性能和功率效率方面提供了显著的改进.
- 这种方法为需要快速过渡响应和低开关损失的应用提供了强大的解决方案.
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