Notice of Violation of IEEE Publication PrinciplesA cascaded high step-up dc-dc converter for micro-grid

Notice of Violation of IEEE Publication Principles

"A Cascaded High Step-up DC-DC Converter for Micro-grid,"
by R. Kameswara Rao, B. Satya Vara Prasad, K. Bapayya Naidu,
in the Proceedings of the 2012 World Congress on Information and Communication Technologies (WICT), October 2012, pp.394-399

After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE\´s Publication Principles.

This paper contains substantial copied text and figures from the papers cited below. The original text was copied without attribution (including appropriate references to the original author(s) and/or paper title) and without permission.

Due to the nature of this violation, reasonable effort should be made to remove all past references to this paper, and future references should be made to the following article:

"Novel High Step-Up DC-DC Converter for Fuel Cell Energy Conversion System"
by Shih-Kuen Changchien; Tsorng-Juu Liang; Jiann-Fuh Chen; Lung-Sheng Yang
in the IEEE Transactions on Industrial Electronics, vol.57, no.6, June 2010, pp.2007-2017

"A Cascaded High Step-Up DC-DC Converter With Single Switch for Microsource Applications,"
by Shih-Ming Chen; Tsorng-Juu Liang; Lung-Sheng Yang; Jiann-Fuh Chen Power
in the IEEE Transactions on Electronics, vol.26, no.4, pp.1146-1153, April 2011

A high-efficiency dc-dc converter with high voltage gain and reduced switch stress is proposed. Generally speaking, the utilization of a coupled inductor is useful for raising the step-up ratio of the conventional boost converter. However, the switch surge voltage may be caused by the leakage inductor so that it will result in the requirement of high-voltage-rated devices. This paper proposes a new high step-up dc-dc converter designed especially for regulating the dc interface between various micro-sources and a dc-ac inverter - o electricity grid. The figuration of the proposed converter is a quadratic boost converter with the coupled inductor in the second boost converter. The converter achieves high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switch. Additionally, the energy stored in the leakage inductor of the coupled inductor can be recycled to the output capacitor. The operating principles and steady-state analysis of continuous-conduction mode and boundary-conduction mode are discussed in detail. The simulation circuit is developed by using the MATLAB/SIMULINK modeling and the concerned characteristics are analysed.