Abstract
Photovoltaic system is
considered as the targeted solution for recent energy crises. Since this system is recyclable and has
a long lifetime, it is distributed throughout the earth and mainly they are pollution free. To transmit power from PV to load ,
high efficiency interface i s essential. In this paper, we proposed a high step up interleaved boost converter with two stage
switched capacitor and coupled inductor. MPPT controller also used to increase the efficiency of photovoltaic power
generation system. This method produces a high step up voltage gain with reduced duty ratio, compared to other
techniques the voltage stress on the switch is greatly reduced, which also reduces the ripples and the conduction loss. Two
stage switched capacitors not only extend the voltage gain, but also effectively use the coupled inductor. The passive clamp
circuit makes main switches to turn off under zero voltage switching and the zero current switching is turned on due to
inductor inherent leakage. Since the current falling rate is controlled by leakage inductance, diode reverse recovery problem
is alleviated and efficiency is improved.
Keywords
MPPT, PV cell, High step up converter, Low voltage stress, Coupled inductor.
Citation
V. THIRUMURUGAN, S. MANOHARAN, Optimized interleaved boost converter with high step up voltage gain for photovoltaic applications, Optoelectronics and Advanced Materials - Rapid Communications, 9, 5-6, May-June 2015, pp.613-618 (2015).
Submitted at: March 7, 2015
Accepted at: May 7, 2015