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Fuzzy-predictive direct power control implementation of a grid connected photovoltaic system, associated with an active power filter

机译：与有源电力滤波器相关的并网光伏系统的模糊预测直接功率控制实现

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摘要

The present paper proposes a real time implementation of an optimal operation of a double stage grid connected photovoltaic system, associated with a shunt active power filter. On the photovoltaic side, a fuzzy logic based maximum power point taking control is proposed to track permanently the optimum point through an adequate tuning of a boost converter regardless the solar irradiance variations; whereas, on the grid side, a model predictive direct power control is applied, to ensure both supplying a part of the load demand with the extracted photovoltaic power, and a compensation of undesirable harmonic contents of the grid current, under a unity power factor operation. The implementation of the control strategies is conducted on a small scale photovoltaic system, controlled via a dSPACE 1104 single card. The obtained experimental results show on one hand, that the proposed Fuzzy logic based maximum power taking point technique provides fast and high performances under different irradiance levels while compared with a sliding mode control, and ensures 1.57% more in efficiency. On the other hand, the predictive power control ensures a flexible settlement of active power amounts exchanges with the grid, under a unity power functioning. Furthermore, the grid current presents a sinusoidal shape with a tolerable total harmonic distortion coefficient 4.71%. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文提出了与并联有源功率滤波器相关的双级并网光伏系统最佳运行的实时实现。在光伏方面，提出了基于模糊逻辑的最大功率点获取控制，以通过对升压转换器进行适当的调整来永久跟踪最佳点，而与太阳辐照度的变化无关。而在电网侧，则采用模型预测直接功率控制，以确保在单位功率因数操作下既向部分负载需求提供提取的光伏功率，又能补偿电网电流的不良谐波含量。控制策略的实施在通过dSPACE 1104单卡控制的小型光伏系统上进行。获得的实验结果一方面表明，所提出的基于模糊逻辑的最大功率获取点技术与滑模控制相比，在不同的辐照水平下提供了快速和高性能，并确保了1.57％的效率。另一方面，在统一功率功能下，预测功率控制可确保灵活解决与电网交换的有功功率量。此外，电网电流呈现正弦曲线形状，可容忍的总谐波失真系数为4.71％。 （C）2016 Elsevier Ltd.保留所有权利。

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