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Dual surface sliding mode controller for photovoltaic systems enhanced by a ripple domain search maximum power point tracking algorithm for fast changing environmental conditions

机译:用于光伏系统的双表面滑模控制器,通过快速搜索环境条件的纹波域搜索最大功率点跟踪算法进行了增强

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摘要

In this research, a dual surface sliding mode controller is proposed and implemented to increase robustness and speed of boost converter, its asymptotic response is proved in the presence of disturbances. In addition, a filtered mapping pulse width modulation technique is developed to attenuate the chattering problem caused by finite frequency switching. Ripple domain search (RDS), a precise maximum power point tracking (MPPT) algorithm, is suggested to find the maximum power point (MPP) in photovoltaics. RDS uses the inherent ripple problem of the converter as a tool for finding MPP. By combining the proposed fast controller and the RDS algorithm, a fast and robust MPPT technique is obtained, which is simple to implement, eliminates the need for initial parameter tuning and is free from oscillations. Moreover, the proposed controlling method and MPPT algorithm are tested using Mitsubishi Electric MF170W module and their efficiency is compared with conventional methods (including & ) in fast irradiation changing conditions. The proposed method harvests a 6% higher power than & and constant voltage. Compared with incremental conductance 24% more power is harvested. Finally, the practicality of the controller and algorithm was experimentally validated with a prototype system using a 5 W Evergreen module.
机译:在这项研究中,提出并实现了一种双表面滑模控制器,以提高升压转换器的鲁棒性和速度,并在存在干扰的情况下证明了其渐近响应。另外,开发了一种滤波映射的脉宽调制技术,以减轻由有限频率切换引起的颤动问题。建议使用波纹域搜索(RDS),一种精确的最大功率点跟踪(MPPT)算法,以找到光伏电池的最大功率点(MPP)。 RDS使用转换器固有的纹波问题作为查找MPP的工具。通过将所提出的快速控制器和RDS算法相结合,可以获得一种快速且强大的MPPT技术,该技术易于实现,无需进行初始参数调整,并且没有振荡。此外,使用三菱电机MF170W模块测试了所提出的控制方法和MPPT算法,并在快速变化的辐射条件下将其效率与常规方法(包括&)进行了比较。所提出的方法比&和恒定电压可获得6%的功率。与增加的电导相比,可收集到的功率多了24%。最后,控制器和算法的实用性已通过使用5 W Evergreen模块的原型系统进行了实验验证。

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