Isolated hybrid power systems (HPSs) with coordinated control of renewable energy sources (RESs) and energy storage devices (ESDs) with appropriate control techniques are studied in this paper for load frequency stabilization. The solar thermal power generation and photovoltaic systems are used as the primary source of generation in the designed test systems. The ESDs used are double-layer capacitor (DLC), ultra-capacitor (UC) and compressed air energy storage as per the designed test system to effectively supply insufficient energy of power generation in a short time. In the designed test system, it is assumed that UC transfers energy to the load side during adequate insolation. Whenever the same may not meet the load demand, DLC provides power to meet the remaining load demand. In one of the designed test systems, load frequency characteristics of the HPS model are carried out with high-voltage direct current link feeding to isolated load. The contribution of this work is the hybridization of RESs with ESDs with appropriate controller and applied control strategy. In the studied system, a proportional-integral-derivative controller is employed and its parameters are tuned by a nature-inspired moth flame optimization technique. The system dynamic performance with different operating conditions is carried out. Both the qualitative and the quantitative aspects show better performance of HPS models under study using the proposed technique.

中文翻译：

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使用储能装置的太阳能热-光伏混合可再生能源发电的频率稳定

本文研究了采用适当控制技术对可再生能源 (RES) 和储能设备 (ESD) 进行协调控制的隔离式混合电源系统 (HPS)，以实现负载频率稳定。在设计的测试系统中，太阳能热发电和光伏系统被用作主要的发电来源。根据设计的测试系统使用的ESD是双层电容器（DLC）、超级电容器（UC）和压缩空气储能，以在短时间内有效供应不足的发电能量。在设计的测试系统中，假设 UC 在足够的日照期间将能量转移到负载侧。每当同样可能无法满足负载需求时，DLC 提供电力以满足剩余的负载需求。在设计的测试系统之一中，HPS 模型的负载频率特性是在高压直流链路馈入隔离负载的情况下进行的。这项工作的贡献是将 RES 与 ESD 与适当的控制器和应用的控制策略相结合。在所研究的系统中，采用比例积分微分控制器，其参数通过受自然启发的飞蛾火焰优化技术进行调整。进行了不同工况下的系统动态性能。使用所提出的技术，定性和定量方面都显示出正在研究的 HPS 模型的更好性能。在所研究的系统中，采用比例积分微分控制器，其参数通过受自然启发的飞蛾火焰优化技术进行调整。进行了不同工况下的系统动态性能。使用所提出的技术，定性和定量方面都显示出正在研究的 HPS 模型的更好性能。在所研究的系统中，采用比例积分微分控制器，其参数通过受自然启发的飞蛾火焰优化技术进行调整。进行了不同工况下的系统动态性能。使用所提出的技术，定性和定量方面都显示出所研究的 HPS 模型具有更好的性能。