双电压向量模型预测控制用于连接到电网的级联H桥多级逆变器,具有固定的开关频率
Jingang Han1, Liang Liu1, Wenqi E1
1Institute of Electric Drives and Control Systems, Shanghai Maritime University, Shanghai, 201306, China.
ISA transactions
|August 30, 2023
概括
一个新的双电压向量模型预测控制 (DVV-MPC) 算法修复了级联H桥 (CHB) 多级逆变器的开关频率. 这项创新简化了输出波器的设计,并提高了与电网连接的应用程序的控制性能.
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:
- 模型预测控制 (MPC) 提供了先进的动态,非线性和多目标控制,但由于不固定的开关频率,它受到分散的波谱的影响,使输出波器设计复杂化.
- 级联H桥 (CHB) 多级逆变器对于电源应用至关重要,但高效和稳定的控制仍然是一个挑战.
研究的目的:
- 为连接到电网的CHB多级逆变器提供一种新的双电压向量模型预测控制 (DVV-MPC) 算法.
- 通过实现固定的切换频率来应对分散的波谱的挑战.
- 为了提高整体控制性能和简化CHB逆变器的过器设计.
主要方法:
- 在单个开关周期内使用两个相邻的电压向量实现DVV-MPC算法.
- 尽量减少额外的成本函数来确定相关电压水平的工作周期.
- 应用相邻区域预测和时间延迟补偿方法来减少计算负担和延迟.
主要成果:
- 拟议的 DVV-MPC 算法成功实现了 CHB 逆变器的固定切换频率.
- 通过对单相7级CHB逆变器的模拟和实验,在动态和稳定状态性能方面都有明显的优势.
- 由于可预测的波频谱,简化了输出波器设计.
结论:
- DVV-MPC战略有效地将MPC的优势与CHB逆变器固定开关频率的优势相结合.
- 该方法适用于带有"n"电池的级联逆变器,并提供了改进的控制和更容易的过器实现.
- 验证了与电网连接的应用程序的有效性,为更高效的功率转换系统铺平了道路.
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