Abstract

The control of renewable energy sources is more complicated when used as hybrid energy systems. Power electronic circuits are used to convert and store the electrical energy generated from renewable energy sources. However, the high frequency switching in these power electronic circuits complicates the control of the systems. Advanced control methods are required to control such complex systems. In this study, a hybrid energy system was devised and implemented experimentally to first convert the solar and wind energy to electrical energy and, then to store and use it through a common bus voltage. The study focused on buck–boost converters' parallel connection and deviations from the common bus voltage level were taken into account. The converter system's control was tested with FLC as the best solution, and the results obtained from simulation and experiments were compared. The experimental setup was controlled with a fast and real-time digital signal processor (DSP). Current and voltage measurement circuits, MOSFET drivers, and parallel-connected buck–boost converters were realized experimentally. The simulations and experimental results were suitable for various solar and wind conditions. This hybrid system was also tested at low solar radiation and at low wind speeds to stabilize common bus voltage and energy harvesting.

摘要

当用作混合能源系统时，可再生能源的控制更加复杂。电力电子电路用于转换和存储可再生能源产生的电能。然而，这些电力电子电路中的高频开关使系统控制复杂化。需要先进的控制方法来控制如此复杂的系统。在这项研究中，混合能源系统被设计和实验实施，首先将太阳能和风能转换为电能，然后通过公共总线电压存储和使用它。该研究侧重于降压-升压转换器的并联连接以及与公共母线电压电平的偏差被考虑在内。变流器系统的控制以 FLC 作为最佳解决方案进行了测试，并将模拟和实验的结果进行了比较。实验装置由快速实时数字信号处理器 (DSP) 控制。电流和电压测量电路、MOSFET 驱动器和并联降压-升压转换器是通过实验实现的。模拟和实验结果适用于各种太阳能和风力条件。该混合系统还在低太阳辐射和低风速下进行了测试，以稳定公共总线电压和能量收集。模拟和实验结果适用于各种太阳能和风力条件。该混合系统还在低太阳辐射和低风速下进行了测试，以稳定公共总线电压和能量收集。模拟和实验结果适用于各种太阳能和风力条件。该混合系统还在低太阳辐射和低风速下进行了测试，以稳定公共总线电压和能量收集。