High-gain DC-DC converter demand increases rapidly when integrating low voltage renewable energy sources (RES), but the converter’s switch and output diode experience voltage stress equal to the converter output voltage. And to improve the reliability of RES, a hybrid source combination structure is suggested in the literature. To integrate such a hybrid energy source, a single-switch dual-input high-gain capability with reduced voltage-stress (SDHRV) converter is adapted by connecting the parts of two standard boost converter and diode capacitor pair. The SDHRV steady-state converter’s operation is explained by using equivalent circuits and mathematical expressions. In addition to the steady-state performance, a state space average mathematical model is constructed to examine the dynamic performance of SDHRV converter. The advantages of the SDHRV converter are highlighted in the comparison section over other high-gain converters. Finally to validate the SDHRV converter performance simulation results are included.

This survey presents an exhaustive view of the implementation of Active Disturbance Rejection Control (ADRC) across the renewable energy system components. ADRC stands out as a formidable control strategy, adept at navigating uncertainties and perturbations without the necessity for system modeling. This feature makes it particularly suitable for renewable energy systems, which are often subject to highly variable environmental conditions and inherent system nonlinearities. The survey covers the implementation of ADRC in wind energy systems, including turbine control for optimal power capture and grid integration for stable energy output. It also examines its application in solar photovoltaic systems with a particular emphasis on maximum power point extraction and inverter control to enhance efficiency and electricity quality. Furthermore, the use of ADRC in hydropower systems for regulating turbine and generator operations is discussed, highlighting its role in maintaining stable power output amidst fluctuating water flow. Additionally, the survey explores the integration of ADRC in hybrid systems, where it manages power distribution among different sources such as solar, battery storage, and wind to optimize overall performance. The advantages of ADRC, such as its adaptability, real-time disturbance rejection, and simplified implementation, are emphasized across these applications. In conclusion, the survey underscores the effectiveness of ADRC in enhancing the stability, reliability, and efficiency of renewable energy systems, positioning it as a crucial control strategy for advancing sustainable energy solutions.

Power generation is shifting towards renewable energy sources (RES) to reduce pollution and uncertainties regarding fossil fuels. Direct integrating to the load is not recommended due to the low voltage produced by these RES. A conventional boost converter is employed to connect the RES to the loads. The performance of these systems is subpar due to the converter’s low voltage gain, and they rely on transformers to enhance the voltage on the AC side, resulting in poor efficiency and a large size of the overall system. By enhancing the voltage gain on the DC side, high-gain power converters are employed as a DC-DC converter to solve the aforementioned issue and eliminate the need for additional transformers in the system. Also, to improve the reliability of RES, a dual-input high-gain quasi (DIHGQ) z-source power converter is recommended in this study to integrate RES. The converter’s operation is examined by using the theoretical waveforms and mathematical equations. The suggested converter’s analytical performance is verified using the MATLAB/Simulink platforms. Along with the steady-state performance, a state space average mathematical model is developed to analyze its dynamic performance. The merits of the DIHGQ converter are demonstrated by comparison with traditional high-gain topologies. The comparison demonstrates that the suggested DIHGQ is one of the options for integrating RES.

This article explores cutting-edge power conversion topologies:$2LC_{m}\ -\ Y$converters with diode capacitor stacking (DCS). The proposed topologies$(2LC_{m}-Y-{D}CS$configurations) achieve high voltage gain through the combination of traditional XY family converter topologies$(2LC_{m}-L, 2LC_{m}-2L,2LC_{m}-2LC, \text{and}2LC_{m}-2L{C}_{m}$) with DCS characteristics. The resulting topologies prove advantageous in applications requiring low to high-voltage conversion, making them well-suited for renewable energy systems such as photovoltaic systems, fuel-cell systems, electric vehicles, HVDC systems, and DC drives. What's more, the incorporation of a stack of capacitors stacking enhances the suitability of the proposed topologies for multilevel inverter based utility grids (MLI). The operating theory of the$2LC_{m}-2LC_{m}-DC{S}$configurations is thoroughly explained, accompanied by a comprehensive analysis of the voltage gain of converters. A comparative analysis of the voltage gain for similar topologies is conducted. Finally, simulation results validate the effectiveness of the research work, confirming its viability in practical applications.

This article presents a breakthrough contribution to the field of fuel-cell vehicular systems-an innovative hybrid switched-reactive (HSR) converter designed to improve voltage gain. The proposed configuration and operational principles are thoroughly discussed, accompanied by an analysis of its non-ideal model. A comprehensive comparison with other non-isolated converters reveals the distinct benefits. Notably, the converter achieves improved voltage gain without employing a transformer, coupled-inductor, or voltage multiplier circuit, resulting in reduced stresses on key components. The practicality of the design is validated through the simulation verification of a 500 W converter, affirming its exceptional performance. This research marks a significant step towards advancing energy efficiency in fuel-cell vehicular systems, with far-reaching implications for sustainable transportation.

Integration of low voltage DC sources with a load/DC microgrid is realized using a high gain DC-DC converter. Research attempts are made to develop a high gain DC-DC converter with an improved efficiency at reduced cost and size. In this paper, two new topologies with multistage extendable feature are introduced. These topologies utilize a switch-diode-inductor-capacitor (SDLC) network. The first topology uses ten components including two semiconductor switches. The second topology is derived by adding a diode and a capacitor additionally to the first topology. Hence, the voltage gain is improved and the component stress is reduced. Hence, the efficiency is improved. The proposed converters use a fewer components for extending the stage. Theoretical analysis of the presented converters is done for both continuous and discontinuous modes of operation. A laboratory prototype of 380 V, 50 kHz, 200 W, is fabricated, tested in the lab to validate the theory proposed. Continuous input current with lesser ripple, reduced switch stress, high voltage gain and n-stage structure are the attractional features of the proposed converters.