High Step-Up DC–DC Converter for AC Photovoltaic Module Application
Ponugoti Sri Lakshmi1, Kande Dayakar2, Dola Sanjay S3

1Ponugoti Srilakshmi, Department of Electrical & Electronics Engineering, JNTU Anantapur University, Geethanjali Institute of Science & Technology, SPSR Nellore India.
2Asst. Prof. Kande Dayakar, Department of Electrical & Electronics Engineering, JNTU Anantapur University, Geethanjali Institute of Science & Technology, SPSR Nellore  India.
3Prof. Dola Sanjay S, Department of Electronics & Communication Engineering, Atmakur Engineering College, Atmakur India.
Manuscript received on 10 December 2014 | Revised Manuscript received on 20 December 2014 | Manuscript Published on 30 December 2014 | PP: 6-12 | Volume-4 Issue-7, December 2014 | Retrieval Number: F1856114614/14©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: Photovoltaic (PV) power-generation market of ac PV module has shown obvious growth. However, a high voltage gain converter is essential for the module’s grid connection through a dc–ac inverter. This paper proposes a converter that employs a floating active switch to isolate energy from the PV panel when the ac-module is OFF; this particular design protects installers and users from electrical hazards. Without extreme duty ratios and the numerous turns-ratios of a coupled inductor, this converter achieves a high step-up voltage-conversion ratio; the leakage inductor energy of the coupled inductor is efficiently recycled to the load. These features explain the module’s high-efficiency performance. The detailed operating principles and steady-state analyses of continuous, discontinuous modes are described. A 15V input voltage, 200V output voltage, 100W output power proto type circuit of the proposed converter has been implemented; its maximum efficiency is up to 95.3% and full-load efficiency is 92.3%.
Keywords: AC Module, Coupled Inductor, High Step-Up Volt Age Gain, Single Switch.

Scope of the Article: Application of WSN in IoT