i-manager's Journal on Electrical Engineering (JEE)


Volume 8 Issue 4 April - June 2015

Research Paper

Transient Analysis of High-Phase Induction Machines

M. Rizwan Khan* , Islam Khan**
* Associate Professor, Department of Electrical Engineering, Aligarh Muslim University, Aligarh, India
** Assistant Professor, ACN College of Engineering and Management Studies, Aligarh, India.
Khan, M. R., and Khan, I. (2015). Transient Analysis of High-Phase Induction Machines. i-manager’s Journal on Electrical Engineering, 8(4), 1-6. https://doi.org/10.26634/jee.8.4.3375

Abstract

In this work, an attempt is made to provide a detailed analysis on the different performance indices of a three phase and high phase induction motor in the SIMULINK environment. There may be two types of configurations possible. The first configuration is made by adding externally a number of identical windings in the already existing three phase induction motor, and the second configuration, in which the same machine is wound for different phase numbers. The relevant changes in the motor, is reported in this paper. Simulations for the second case has been carried out and the results from the simulations show that high phases (3, 5, 7) have better performance characteristics such as speed, torque, current etc. as compared to three-phase counterpart machine. The findings are verified by experimentation.

Research Paper

Bearing Fault Detection in PWM Inverter Fed Induction Motor Drives by Transformative Techniques

Khadim Moin Siddiqui* , Kuldeep Sahay**, V. K. Giri***
* Research Scholar, Department of Electrical Engineering, Institute of Engineering & Technology, Lucknow, India.
** Professor, Department of Electrical Engineering, An Autonomous Constituent Institute of Uttar Pradesh Technical University, Lucknow, India.
*** Professor, Department of Electrical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, India.
Siddiqui, K. M., Sahay, K., and Giri, V. K. (2015). Transient Analysis of High-Phase Induction Machines. i-manager’s Journal on Electrical Engineering, 8(4), 7-18. https://doi.org/10.26634/jee.8.4.3376

Abstract

Nowadays, the Squirrel Cage Induction Motor(SCIM) fed with PWM (Pulse Width Modulated) inverter is being extensively used in the industries to achieve variable speed for many applications. It provides greater advantages on cost and energy efficiency for varying speed applications as compared to other available industrial solutions. These kinds of drives are recently gathering enormous interest in the multi-megawatt industrial drive applications. In this paper, the bearing fault of the SCIM has been diagnosed in the transient condition as well as steady state conditions by advanced Digital Signal Processing(DSP) transformative techniques. The bearing fault has been diagnosed in the steady state condition by Fast Fourier Transform (FFT) algorithm and in the transient condition by time domain as well as wavelet transform. The results obtained by all three transformative techniques has been compared and it has been concluded that the wavelet transform is most suitable technique for early fault detection purpose. As a result, an early diagnosis of bearing fault is possible by wavelet transform and damage can be averted. Thus, industries can save money using this approach.

Research Paper

SYMLET Wavelet Transform Applied to Inspect Power Quality Disturbance-Generated Signals

Anand Deshmukh* , Shekhappa G. Ankaliki **
* Assistant Professor, Department of Electrical and Electronics Engineering, SDM College of Engineering, Dharwad.
** Professor and PG Coordinator, Department of Electrical and Electronics Engineering, SDM College of Engineering, Dharwad.
Deshmukh, A., and Ankaliki, S. G. (2015). SYMLET Wavelet Transform Applied to Inspect Power Quality Disturbance-Generated Signals. i-manager’s Journal on Electrical Engineering, 8(4), 19-25. https://doi.org/10.26634/jee.8.4.3377

Abstract

Power quality analysis is a classical problem in Electrical Engineering, since the electrical signal contains transients' disturbances, that can be caused for diverse reasons: Switching of electrical motors, capacitor banks, etc. For improving the power quality knowledge, it is necessary to analyze efficiently the different disturbances. The objective is to identify the transients in real time, to be corrected immediately. One of the most important issues in power quality problems is, how to detect and classify disturbance waveforms automatically in an efficient manner. Automatic disturbance recognition can be carried out with the help of a wavelet transform. The approach proposed in this paper is robust in detecting and localizing a wide range of power disturbances such as fast voltage fluctuations, short and long duration voltage variations, transients, noise and harmonic distortion.

Research Paper

Impact of Demand-Side Management on Power System Reliability

E. M. Saied* , S. Soliman**, S. A. Mahmoud***, H. M. Gad-Alla****
* Faculty of Engineering, Shoubra- Benha University, Egypt.
**_***_***** Hot Laboratories Center, Atomic Energy Authority, Egypt.
**** Egyptian Electricity Holding Company, Egypt.
Saied, E. M., Soliman, S., Rihan, Y., Mahmoud, S. A., and Gad-Alla, H. M. (2015). Impact of Demand-Side Management on Power System Reliability. i-manager’s Journal on Electrical Engineering, 8(4), 26-33. https://doi.org/10.26634/jee.8.4.3378

Abstract

The goal of this paper is to determine the impact of Demand Side Management (DSM) programs on the power system load curve and on the power system reliability. DSM program includes the methods: Valley Filling Method, Energy Conservation Method, Peak Clipping Method, Load Shifting Method and Load Building Method. Different DSM programs were applied on the Egyptian Electricity Power System to determine the effect of DSM programs (only four methods) on maximum annual day load profile and the resultant curve was used to determine the effect of DSM on the total system cost and planning reserve margin by using Model for Energy Supply Strategy Alternatives and their General Environmental Impacts (MESSAGE) program.

Review Paper

Review and Study of Different Topologiesin Sepic Converter

Kamal Singh* , Kuldeep Sahay**
* Assistant Professor, Department of Electrical Engineering, Radha Govind Engineering College Meerut.
** Professor, Department of Electrical Engineering, Institute of Engineering & Technology, Lucknow.
Singh, K., and Sahay, K., (2015). Review and Study of Different Topologies in Sepic Converter. i-manager’s Journal on Electrical Engineering, 8(4), 34-43. https://doi.org/10.26634/jee.8.4.3379

Abstract

This paper presents different topologies applied to the Single ended primary inductor converter (SEPIC) to obtain high static gain, and an overview of different types of converters. Nowadays, there is requirement of high efficiency in Dc-Dc converters for better performance of appliances. Hence, so many techniques are developed in order to increase the static gain of DC-DC converters for high efficiency and also high power solutions. New alternatives in SEPIC converter have been proposed for high and very high step-up ratio applications, which are based on new topologies known as modified SEPIC converters. These modifications give high static gain in comparison with the existing SEPIC converter and other classical converters.