Robust control of DC-DC boost converters for solar systems

Yeqin Wang, B. Ren, Qing-Chang Zhong
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引用次数: 7

Abstract

It is very challenging to control a DC-DC boost converter, due to its non-minimum phase phenomenon, model uncertainties (e.g., the parasitics), and external disturbances (e.g., input voltage change or load change). In this paper, a uncertainty and disturbance estimator (UDE)-based current-mode control (CMC) is proposed to address these problems. A new voltage dynamics is developed to avoid the non-minimum phase phenomenon. Then the UDE algorithm is adopted for both voltage-loop control design and current-loop control design to deal with model uncertainties, external disturbances, and the inductor current estimation error. Furthermore, a new control framework based on this UDE-based CMC is proposed for the grid integration of solar systems with voltage protection. Experimental results are provided to demonstrate the effectiveness and robustness of the proposed strategies.
太阳能系统DC-DC升压变换器的鲁棒控制
由于其非最小相位现象、模型不确定性(如寄生)和外部干扰(如输入电压变化或负载变化),DC-DC升压变换器的控制非常具有挑战性。本文提出了一种基于不确定性和干扰估计(UDE)的电流模式控制(CMC)来解决这些问题。为了避免非最小相位现象,提出了一种新的电压动力学方法。然后采用UDE算法进行电压环控制设计和电流环控制设计,以处理模型不确定性、外部干扰和电感电流估计误差。在此基础上,提出了一种新的电压保护太阳能系统并网控制框架。实验结果证明了所提策略的有效性和鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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