An innovative interleaved high step‐up direct current–direct current converter with switched‐inductor/capacitor–diode units for hydrogen fuel cell power system

Using interfacing converters with a high boost factor and high efficiency is essential for utilizing the solar cells energy since these energy sources produce low voltage levels. Although employing a high‐frequency transformer or coupled inductors in such converters results in high gain, these elements increase the weight, volume, and cost and affect the efficiency. This article presents a new topology for DC‐DC converter with a high voltage gain to overcome the mentioned problems. The converter provides a higher voltage gain than conventional structures while it includes only one power switch. The switch is connected to the ground; thus, a simple control circuit is required. Besides, the proposed structure has a low output voltage ripple. In this paper, the operating modes of the proposed topology, the influence of parasitic elements on the boost factor, and the efficiency have been described in detail. These item has been examined by experimental verifications. A 500‐W laboratory prototype confirms the proposed topology. Results demonstrate that the topology produces high efficiency and voltage gain.

Section: Introductionmentioning

confidence: 99%

A new step‐up DC‐DC converter with high gain for photovoltaic applications

Yavari

Salemnia

Javadi

2022

Unstable behavior analysis and stabilization of double‐loop proportional‐integral control H‐bridge inverter with inductive impedance load

Xie

Shen

et al. 2021

Summary With the rapid development of renewable energy, inverters have been widely used in the distributed power system. For the safety of the distributed power system, the stable operation of the inverter is vital. Hence, this paper detects slow‐scale instability fast‐scale instability and in the double‐loop proportional‐integral (PI) control single‐phase full H‐bridge inverter with inductive impedance load by the discrete‐mapping model firstly. Next, the mechanism of the mechanism slow‐scale and fast‐scale behaviors are explained by state‐space average model and Filippov method, respectively. Then, passive damping method and sine wave compensation techniques are extended to the system to suppress the nonlinear behaviors. Finally, the PLECS simulation and experiments are utilized to verify the correctness of the investigations.

A high step‐up DC/DC converter with capacitor‐clamped double‐switch structure for proton exchange membrane fuel cell application

Zhou,

Qi,

Bai

et al. 2024

SummaryDue to the low output voltage and soft output characteristics of proton exchange membrane fuel cell (PEMFC), DC/DC converter with high voltage gain has become a key part for safe and stable operation. In this paper, a novel high step‐up DC/DC converter with switched‐inductor (SI), switched‐capacitor (SC), and a capacitor‐clamped double‐switch structure is proposed, which can obtain high voltage gain with lower duty cycle and low voltage stress on switches and diodes. Switches run in an interleaving mode to reduce the inductor current ripple. The detailed analysis of the converter, device parameter design, comparation with other converters, and double closed‐loop controller design are presented, respectively. Finally, a 100‐W, 15‐V/100‐V experimental prototype is built to demonstrate the effectiveness of the proposed converter and controller.