固定框架功率调节用于控制连接到电网的三相模块化多层转换器,在不平衡电压下具有低波
1Department of Electrical Engineering, Mazandaran University of Science and Technology, Babol, Iran. e.akbari@ustmb.ac.ir.
Scientific reports
|February 18, 2025
概括
本研究介绍了电网中模块化多层转换器 (MMC) 的新控制策略. 该方法通过减轻电压总波扭曲 (THD) 来提高电能质量和功率系数,即使电网电压不平衡,也可以.
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:
- 电子电力转换器对电网至关重要,提高了能源质量,并使双向能源传输成为可能.
- 与传统转换器相比,模块化多层转换器 (MMC) 提供了诸如低波元件和降低过要求等优势.
- 在电网干扰下保持正弦波形和有效的功率控制仍然是一个挑战.
研究的目的:
- 为连接到电网的三相MMC引入基于固定参考框架的控制策略.
- 为了证明MMC在不平衡的电网电压条件下保持输出正弦形波形的能力.
- 消除对同步框架转换和相锁循环 (PLL) 的需求.
主要方法:
- 使用传统的PI控制器来跟踪即时的功率元件,并有意进行双电网频率振荡.
- 在三相模块化多层转换器 (MMC) 上实施控制策略.
- 在MATLAB/Simulink中执行模拟以验证拟议的方法.
主要成果:
- 拟议的策略有效地减轻了电压总波扭曲 (THD),改善了主动和反应功率控制.
- 尽管电网电压条件不平衡,但MMC转换器保持了正弦输出波形.
- 该方法避免了PLL和同步框架转换的需要,简化了控制系统.
结论:
- 固定参考框架控制策略对于连接到电网的MMC是有效的,提高了电力质量和控制.
- 使用这种策略的MMC转换器,与传统的两级和三级电压源转换器 (VSC) 相比,具有显著的优势.
- 拟议的方法为需要高质量的电力转换的电网应用提供了强大的和高效的解决方案.
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