High step‐up interleaved DC‐DC converter for photovoltaic systems

Abstract

This study proposes a new interleaved high step‐up topology based on cross‐coupled inductors and voltage multiplier cells (VMCs). Two series capacitors in VMC are employed to raise voltage gain and diminish peak voltage across switches. Thus, low voltage MOSFETs with low on‐resistance (Rdsfalse(onfalse)) can be used in the proposed converter. Due to the presence of the leakage inductors in coupled inductors, the falling rate of the output diodes current is controlled and the diode recovery current problem at turn‐off can be mitigated. In addition, switches are turned on under ZCS conditions which results in efficiency improvement. Using two‐phase topology reduces input current ripple and shares power losses between each phase. The converter is analyzed and its operation is investigated using detailed comparisons. Finally, to confirm the performance of the proposed converter, a 30 V input voltage to 400 V output voltage prototype with the rated power of 220 W is implemented and tested in the laboratory.

Presenting of the Magnetic Coupling-Based Transformer-Less High Step-Up DC-DC Converter for Renewable Energy Applications

“…However, the input ripple of the proposed converter is high and also it cannot be used for high power applications. Reference [29] introduced a high step-up interleaved DC-DC structure with a wide voltage conversion ratio.…”

Ultra high step‐up soft‐switching DC/DC converter using coupled inductor and interleaved technique

“…According to Table 1 and Figure 7, the proposed converter has the following advantages: As shown in Figure 7(a), the voltage gain of the proposed converter is higher than the converters presented in refs. [17],[18],[20], [22], [23], [24] and [26]. The converters presented in refs.…”

“…By observing Figure 7(b), it can be said that the voltage stress of power switches in the proposed converter is lower than the converters presented in refs. [17], [18], [20], [22], [23], [24] and [26]. The converters presented in refs.…”

A novel high‐efficient step‐up converter with continuous input current, common ground, and minimum stress on semiconductors

“…However, besides the mentioned converters, the proposed converter has a comparable efficiency value of over 97% in theoretical calculation. On the other hand, the suggested topology in reference FIGURE 6 The comparison between ideal and non-ideal voltage gain for 100 W output power [26] provides 92.79% efficiency, which makes it useless in higher power values. Moreover, the efficiency of the [28] is 93.36% which is the worst one behind [26].…”

“…The windings turn ratio in transformer-based converters increases the voltage gain regardless of the duty cycle percentage [6,7]. Such converters provide the isolation of the sensitive loads and input source.…”