College of Engineering, Pune

About: College of Engineering, Pune is a based out in . It is known for research contribution in the topics: Computer science & Sliding mode control. The organization has 4264 authors who have published 3492 publications receiving 19371 citations. The organization is also known as: COEP.

Modeling of wind energy system with MPPT control for DC microgrid

Abstract: The paper proposes wind energy conversion system modeling with the help of MATLAB Simulink for dc microgrid application. For tracking maximum power available in wind energy, MPPT (Maximum Power Point Tracking) technique is used. The proposed system contains the wind energy conversion model, 3-ph diode bridge rectifier model, MPPT controller and DC-DC converter (Buck converter) model. The DC-DC converter model (buck converter) permits the output of MPPT controller i.e. duty cycle to make adjustment in input voltage of converter for tracking maximum power point from wind generator. The major advantages of the designed system are circuit simplicity as well as simple control algorithm for supplying power to dc microgrid. By making comparison to the system without MPPT control, system with MPPT control gives greater output power.

Dynamic modeling and simulation of a PEM fuel cell: MATLAB and LabVIEW modeling approach

Abstract: The polymer electrolyte membrane fuel cell (PEMFC) has emerged as a promising fuel cell technology for a varied range of stationary as well as transportation applications This paper presents a dynamic model of a PEMFC system which can be used for further development of a control system for the same The proposed model incorporates various dynamic operating conditions like changes in load current, pressures of input reactant gases and the cell operating temperature The model has been implemented in MATLAB as well as a simulation has been verified in LabVIEW The simulation has been designed to be very user-friendly and conveniently alter the various dynamic conditions and observe the responses For the purpose of validating the model, a comparison has been made by using experimental data from the PEM fuel cell testing The presented dynamic model can thus be useful in testing various control strategies and designing a controller for the fuel cell system

Secure authentication for online voting system

Abstract: The secure online voting system is the need of today's era. We propose a new secure authentication for online voting system by using biometric feature and steganography. Voter is asked to enter a password at the time of registration. Password is converted into secret message using timestamp and hashing. This secret message is stored in image using steganography. In this model, a person can also vote from outside of his/her allocated electorate or from his/her chosen location.

Image scrambling methods for digital image encryption

Abstract: Information security is main concern at present. Image scrambling is one of the way to encrypt the digital image data. This paper present novel image scrambling method using Non-Commutative wavelet transform and Poker Shuffle transform. Due to suitability of Non-commutative Wavelet transform for image scrambling application over conventional Wavelet transform and non-linearity and non-analytic computation characteristics of Poker Shuffling increases the performance of proposed methodology. The proposed method compared with different existing image scrambling algorithm on the ground of image encryption.

A Buck-Boost topology based hybrid converter for standalone nanogrid applications

Abstract: This paper proposes a novel hybrid converter derived from a conventional Buck Boost DC-DC Converter. The principle of Augmented Sinusoidal Pulse Width Modulation (ASPWM) is used to derive the hybrid topology. It provides both AC and DC voltages using a single DC source as input. As a result of ASPWM switching, the voltage across the Buck-Boost stage inductor will contain a line frequency component, which can be extracted by a frequency selective network. The DC voltage gain for buck-boost converter with ASPWM has been derived and it is shown that buck-boost converter acts as a boost converter for all ranges of DC offset under ASPWM switching. The circuit has been extensively simulated in MATLAB/Simulink for various load conditions. The proposed circuit will have applications in standalone nanogrids where the loads will essentially be AC as well as DC.