Electrical Engineering

Trends in

www.stmjournals.com STM JOURNALSScientific Technical Medical

Ÿ Voltage and Power Quality Control in Wind Power Application by Dynamic

Compensation

Ÿ Discrete Hidden Markov Model based Face Recognition System Introducing

Sustainability of Uneven Lighting Distortion

(TEE)Jan - April 2014

ISSN: 2321-4260

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Electrical Engineering Department college of Engineering, King

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Ashok S Department of Electrical Engineering,

National Institute of Technology, Calicut, India.

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in-Charge, Centre for Industrial Electronics & Robotics, Dept. of Electrical Engg.

National Institute of Tech., Rourkela, India.

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College & Research Center, Jaipur, India.

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STM JOURNALS

1. Voltage and Power Quality Control in Wind Power Application by Dynamic Compensation R. Manikandan, S.P. Rajkumar 1

2. Discrete Hidden Markov Model based Face Recognition System Introducing Sustainability of Uneven Lighting Distortion Md. Rabiul Islam and Rizoan Toufiq 9

ContentsTrends in Electrical Engineering

TEE(2014) © STM Journals 2014. All Rights Reserved

Trends in Electrical Engineering ISSN: 2321-4260

Volume 4, Issue 1

www.stmjournals.com

Discrete Hidden Markov Model based Face Recognition

System Introducing Sustainability of Uneven Lighting

Distortion

Md. Rabiul Islam* and Rizoan Toufiq Department of Computer Science & Engineering,

Rajshahi University of Engineering & Technology,

Rajshahi-6204, Bangladesh

Abstract The aim of this work is to enhance the performance of appearance based face recognition

system to remove the uneven lighting effect which is generally occurred in natural

environment. Active Shape Model has been used to detect the facial shape and contrast based edge detection technique has been applied to reduce the uneven lighting problem.

Linear Discriminant Analysis has been used to reduce the dimension of the facial feature vector. Discrete Hidden Markov Model has used for learning and testing model for

create template for each human face and recognize those pattern. Extended Yale face

database has used to measure the performance of the proposed face recognition system with the existence of various uneven lighting effects. Experimental results and

performance analysis show superiority of the proposed system with different variations of

light with the rate of change of azimuth and elevation.

Keywords: Face Recognition, Uneven Lighting Effect, Appearance based feature,

Linear Discriminant Analysis, Discrete Hidden Markov Model

TEE(2014)© STM Journals 2014. All Rights Reserved

Trends in Electrical Engineering ISSN: 2321-4260

Volume 4, Issue 1

www.stmjournals.com

Voltage and Power Quality Control in Wind Power

Application by Dynamic Compensation

R. Manikandan*, S.P. Rajkumar

Department of EEE, Sri Ramakrishna Engineering College, Coimbatore, India

Abstract Power quality problem is a critical problem in a power system. Most of the pollution problems created in power system is due to the nonlinear nature of loads. Due to large

amount of non-linear equipment, impact and fluctuating loads (such as locomotive, arc-

furnace, welding equipment, etc.); wind power as a rule, does not contribute to voltage

regulation in grids. Also wind power very often is a source of voltage sag or swell. The

power systems are often considered weak in that they possess relatively low short-circuit ratio, compared to a grid. Network voltage control becomes a challenging task as a

result. The loads are also sensitive to short-duration disturbances in the form of voltage

sags or swells. The use of STATCOM in improving voltage quality of isolating power systems is considered. The compensators are used to mitigate the effects of momentary

voltage sags/swells.

Keywords: Sag, STATCOM, Power quality