Performances of an Interleaved High Step-Up Converter with Different Soft-Switching Snubbers for PV Energy Conversion Applications

Table 2

Preliminary comparisons among the different high step-up converters for the PV power system.

Items for comparison	The proposed boost converter with single-capacitor snubber	The proposed boost converter with boost type snubber	The boost converter proposed in [25]	The high step-up converter proposed in [27]
Key component counts
Active switch	2	5	4	4
Passive switch	2	5	4	2
Magnetic core	2	6	4	3
Resonant/output capacitor	2	3	6	3
Seft-switching features
Main switches	Turn on hard switching; turn off ZVT	Turn on ZVS; turn off hard switching	Turn on ZVS; turn off hard switching	Turn on ZVS; turn off hard switching
Auxiliary switches		Turn on ZVS; turn off hard switching	Turn on ZVS; turn off hard switching	Turn on ZVS; turn off hard switching
Cost	Lower	High	Middle	Low
Duty ratio limitation	𝐷<0.5	𝐷<0.5	𝐷>0.5	𝐷>0.5
Turns ratio of transformer	20	20	2.5	2.125
Control complexity	Middle (86%)	High (90%)	Higher (94.4%)	Highest (96%)
Conversion efficiency under full load condition	Simplicity	Complexity	Complexity	Complexity
Power level application	Middle power level	High power level	Lower power level	Low power level