连接到电网的光伏系统的输出反控制基于一个具有功率平滑能力的多层飞行电容器逆变器
Younes El Khlifi1, Abdelmounime El Magri1, Rachid Lajouad1
1EEIS Lab, ENSET Mohammedia, Hassan II University of Casablanca, Morocco.
ISA transactions
|February 20, 2024
概括
本研究介绍了一种新的无传感器控制,用于使用多层飞行电容逆变器连接到电网的光伏系统. 控制器通过平滑功率波动和管理电压来提高电网稳定性,这对于可再生能源集成至关重要.
科学领域:
- 电气工程 电气工程
- 可再生能源系统可再生能源系统
- 电力电子 电力电子 电力电子
背景情况:
- 大规模的可再生能源整合减少了电网惯性和电压支.
- 有临时存储的逆变器可以减轻电力短缺和波动.
- 现有的控制方法可能无法充分解决与电网连接的光伏系统的稳定性挑战.
研究的目的:
- 为单相联网光伏 (PV) 系统提出一种新的无传感器控制策略.
- 为了提高功率平滑和电网稳定性,使用多层飞行电容逆变器 (MFCI).
- 在不同的气候条件下增强最大功率点跟踪 (MPPT) 并确保功率因子校正和电压平衡.
主要方法:
- 一种无传感器控制方法,用于使用MFCI的单相联网光伏系统.
- 一个双级联循环控制器:MPPT的外部循环,使用Lyapunov理论的模型预测控制 (MPC) 进行功率因子校正和电压平衡的内部循环.
- 将卡尔曼式高增益观察器与MPC集成在一起,以准确地估计飞行电容器电压.
- 开发用于电流管理的参考信号生成算法.
主要成果:
- 拟议的控制器有效地平滑光伏系统的输出功率.
- 使用集成观察器,可以准确估计飞行电容器的电压.
- 控制器在各种电网运行条件下表现出强大的性能.
- 在 MATLAB/Simulink 上的模拟结果证实了控制器的有效性和稳定性.
结论:
- 开发的无传感器控制策略提高了联网光伏系统的稳定性和性能.
- 与拟议的控制相结合,MFCI有效地解决了现代电网中的低惯性和电压支持问题.
- 控制器提供了一种可靠的解决方案,用于管理电力流量,并改善可再生能源的电网整合.
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