扩大混合级联式H桥逆变器的运行范围,具有电容器电压平衡能力
Abhilash Tirupathi1, Jonathan Pribadi1, Min-Seok Kim1
1Department of Electrical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea.
Sensors (Basel, Switzerland)
|February 10, 2024
概括
三相混合级联H桥 (HCHB) 逆变器的新控制方案扩展了工作电压范围. 它有效地使用独立的偏移电压来管理电容电压漂移,提高了整个应用程序的逆变器性能.
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:
- 三相混合级联H桥 (HCHB) 逆变器由于电容器电压漂移而面临运行范围的限制.
- 电容器电压的不稳定性阻碍了HCHB逆变器在各种电压水平和操作条件中的应用.
- 现有的控制方案往往需要进行结构修改或添加组件来解决这些局限性.
研究的目的:
- 提出一个通用的控制方案,以扩大高联频逆变器的操作电压范围.
- 开发一种新的平衡控制策略,以减轻电容电压漂移.
- 提高高频逆变器的稳定性和适用性,而不会改变它们的基本结构.
主要方法:
- 引入了一个通用的控制方案,扩大了三相高频逆变器的运行范围.
- 使用两个独立的偏移电压实现了一种新的平衡控制策略.
- 这种方法同时控制直流连接和飞行电容,调整共同的参考电压到同一集群中最近的水平.
主要成果:
- 拟议的控制方案有效地扩大了HCHB逆变器的运行范围,而无需进行结构变化.
- 新型平衡控制器在各种调制指数和功率因子下成功调节直流连接和飞行电容器电压.
- 模拟和实验结果验证了该技术在减轻电容器电压漂移方面的有效性.
结论:
- 一般化的控制方案提供了一个强大的解决方案,以提高HCHB逆变器的性能和适用性.
- 独立的偏移电压注入有效地解决了电容电压漂移问题,这是高联频逆变器运行中的一个关键挑战.
- 这种方法提供了一种多功能和高效的方法,可以在各种电压水平上扩展HCHB逆变器的功能.
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