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首页> 外文期刊>Renewable Power Generation, IET >Design of a robust H∞H??? current controller for grid-connected photovoltaic systems based on cascaded multilevel inverter
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Design of a robust H∞H??? current controller for grid-connected photovoltaic systems based on cascaded multilevel inverter

机译：设计一个强大的h∞h???基于级联多级逆变器的电网连接光伏系统电流控制器

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摘要

This work proposes a design method for robust state feedback H-infinity grid current controller applied to single-phase grid-connected photovoltaic (PV) systems. The proposed method achieved high system reliability even dealing with grid distorted voltages and other power quality issues. The robustness of the H-infinity controller was verified in the face of parametric uncertainties at the first-order output filter, and also a satisfactory disturbance rejection performance was achieved. The proposed design is based on linear matrix inequalities associated with constraints involving H-infinity optimisation and a pole placement analysis on the continuous-time domain. A discrete-time analysis is also presented in order to indicate the simplicity of its implementation by a microcontroller or similar devices. Based on the presented results and in order to validate the proposed controller, its robust performance was compared with two linear and well-known control methods: a classical PI controller, in terms of robustness; and a robust H-infinity resonant controller, regarding the power quality at the connection point with the grid-utility. Although the conclusions were listed regarding a low voltage PV grid-interactive multilevel power converter, the proposed H-infinity control design (and its concepts) can be applied to a great variety of renewable energy resources systems.
机译：这项工作提出了一种用于施加到单相网连接光伏（PV）系统的鲁棒状态反馈H-Infinity网格电流控制器的设计方法。拟议的方法实现了高系统可靠性，即使处理网格扭曲的电压和其他电力质量问题。在一阶输出滤波器的参数不确定性面前验证了H-Infinity控制器的鲁棒性，并且还实现了令人满意的扰动抑制性能。所提出的设计基于与涉及H-Infinity优化的约束相关的线性矩阵不等式以及在连续时域上的极点分析。还呈现了离散时间分析，以指示通过微控制器或类似设备实现其实现的简单性。根据所提出的结果，为了验证所提出的控制器，将其强大的性能与两个线性和众所周知的控制方法进行比较：既有稳健性的经典PI控制器;和一个强大的H-Infinity谐振控制器，有关连接点的电源质量，具有网格实用程序。虽然关于低压PV电网交互式多级电力转换器的结论，但是提出的H-Infinity控制设计（及其概念）可以应用于各种可再生能源资源系统。

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