Design and implementation of an ultra‐high voltage DC‐DC converter based on coupled inductor with continuous input current for clean energy applications

Abstract

A single-switch ultra-high voltage DC-DC converter is proposed in this paper. In the introduced structure, a voltage multiplier cell (VMC) and three-winding coupled inductor (CL) are integrated to obtain an ultra-large voltage gain. The input current ripple of the presented configuration is very low due to utilizing an inductor in the input part of the converter which is a very important factor in clean energy applications. The CL leakage inductance energy is successfully recovered, and the main power switch voltage stress is clamped because of using a passive clamp circuit. Therefore, a switch with low os-state resistance can be applied, which declines the conduction losses as well as the cost of the suggested topology. Moreover, the common ground between the input and output of the proposed configuration makes it suitable for many applications such as photovoltaic systems. Some important merits include ultra-high voltage gain, operating in low duty cycles, reduced voltage stress of semiconductors, continuous input current, and high efficiency, which make the introduced converter very suitable for clean energy applications. The operation principle, steady-state analysis, design considerations, and theoretical efficiency analysis of the suggested converter are discussed completely in the paper. Also, the superiority of the proposed converter over recently suggested similar most important DC-DC converters is demonstrated in the comparison study. Finally, the performance and theoretical analysis of the converter are validated with the experimental results at an output voltage of 450 V and an output power of 250 W. K E Y W O R D S continuous input current, coupled inductor, DC-DC converter, high voltage gain, single switch, voltage multiplier cell 1 | INTRODUCTION In recent years, the generation of electricity power mostly belongs to fossil fuels. Nevertheless, searching for alternative clean energy resources like wind energies and solar is remarkably becoming a hot research topic among researchers. The consumption of fossil fuels has several disadvantages that can be overcome by the renewable energy sources

Analytical tuning of 2‐DOF smith predictor control scheme for DC‐DC boost converter: A process control perspective

“…Moreover, in most of the processes using boost converter, it is possible to effectively use theorems proved in this paper to obtain (i) gains of PID controllers and (ii) parameters λ , ζ , based on circuit parameters for, better response than the basic heuristically tuned PID without set point filter. One of the interpretation of 2‐DOF‐1‐TP is that it not only provides an additional tuning parameter in the controller, it also enhances the bandwidth of the close loop system, see Figure 7 1–17 …”

“…The presence of an RHP zero in mathematical model (2) poses serious difficulties in design of control law for boost converter. These difficulties continue in any other power electronics systems of which boost converter is an integral part, namely, interleaved boost converter, or renewable energy conversions 4,8–12 . In nutshell, among all power electronics converter, the task of designing a control law to regulate the output voltage for boost converter is the most difficult task as compared to other power converters of which boost converter doesn't constitutes a part.…”

“…These difficulties continue in any other power electronics systems of which boost converter is an integral part, namely, interleaved boost converter, or renewable energy conversions. 4,[8][9][10][11][12] In nutshell, among all power electronics converter, the task of designing a control law to regulate the output voltage for boost converter is the most difficult task as compared to other power converters of which boost converter doesn't constitutes a part. More precisely, an RHP zero is equivalent to a pole in terms of phase shift but behaves as a zero when the magnitude is considered.…”

A High-Gain Multiphase Interleaved Differential Capacitor Clamped Boost Converter

“…However, this approach suffers from huge voltage spikes caused by the transformer's leakage inductance, resulting in power loss in the switch. Thus, non-isolated BDCs [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] are chosen over isolated BDCs due to their various advantages, such as their higher efficiency, greater reliability, and lower component count, which leads to a smaller size and lower overall cost [5,6]. In general, a high duty cycle is used to achieve high gain in transformerless converters.…”

“…Furthermore, the reliability of the switches is harmed as a result of the high voltage stress caused by the high duty ratio. To address these concerns, other converter topologies have been proposed in the literature, including coupled inductors in typical boost topologies [11][12][13][14], cascading converters [15] and interleaved topologies [9,10,16,17] to alleviate voltage spikes. Coupled inductor (CI)based topologies have received the most attention as they can achieve high conversion gains due to their compactness and high power density in both charging and discharging modes [18][19][20][21][22].…”