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


Volume 4 Issue 2 October - December 2010

Research Paper

High Power Factor Based Novel Design of Sodium Lamps

Sankar S* , G. Gokula Krishnan **
*, ** Senior Lecturer, Department of EEE, Panimalar Institute of Technology, Tamil Nadu, India.
S. Sankar and G. Gokula Krishnan (2010). High Power Factor Based Novel Design Of Sodium Lamps. i-manager’s Journal on Electrical Engineering, 4(2), 1-6. https://doi.org/10.26634/jee.4.2.1270

Abstract

In recent years many authors [1-4] are working to obtain single stage HPF electronic ballast for fluorescent and HID lamps to obtain cost reduction and to comply with international standard requirements. Usually to obtain HPF in electronic ballast for high pressure sodium lamps a Power Factor Preregulator (PFP) is used between the mains and the electronic ballast. In this paper will be reported the study and implementation of two single stage High Power Factor (HPF) electronic ballasts for high pressure sodium (HPS) lamps using a LCC filter, one using a half-bridge inverter and the second one using a full-bridge inverter. The main idea in this work is to compare two simple electronic ballasts topologies with HPF for HPS lamps working with a 220 VRMS mains voltage. Design criteria, simulation and experimental results will be also presented for a full bridge inverter in the final paper.

Research Paper

Fuzzy Logic Power Oscillations Damping (FLPOD) Controller for UPFC to Enhance the Transient Stability of Multi Machine Power System

Prabhakar Reddy* , Sanker Ram**
* Research scholar, Department of Electrical and Electronics Engineering, JNT University, Hyderabad.
** Professor, Department of Electrical and Electronics Engineering, JNT University, Hyderabad College of Engineering, Hyderabad.
I. Prabhakar Reddy and B.V. Sanker Ram (2010). Fuzzy Logic Power Oscillations Damping (FLPOD) Controller for UPFC to Enhance the transient Stability of Multi Machine Power System. i-manager’s Journal on Electrical Engineering, 4(2), 7-12. https://doi.org/10.26634/jee.4.2.1271

Abstract

The Unified Power Flow Controller (UPFC) is one of the key Flexible AC Transmission System (FACTS) controller used to control active and reactive power flow in a transmission line and regulate the bus voltage within specified limits at which UPFC is connected. The Proportional and Integral (PI) controller of UPFC is not enough to damp power oscillations because of slow response of PI controller. This paper presents Fuzzy Logic Power Oscillation Damping (FLPOD) controller along with PI controller to improve the performance of UPFC in damping of power oscillations. The UPFC with the proposed controller effectively damps power oscillations after clearing fault in the power system. The UPFC with proposed controller is tested on Western System Coordinating Council (WSCC) — 9 Bus system through simulation by using SIMULINK.

Research Paper

Enhancement of Energy Efficiency in Squirrel Cage Induction Motors Using DCR Technology

S. Manoharan* , N. Devarajan**, M. Deivasahayam***, G. Ranganathan****
* Professor, Department of EIE, Karpagam College of Engineering,Coimbatore.
** Associate Professor, GCT, Coimbatore.
*** J.M.D., Mehala Machines India Ltd., Coimbatore.
**** Consultant Engineer, Coimbatore.
S. Manoharan, N. Devarajan, M. Deivasahayam and G. Ranganathan (2010). Fuzzy Logic Power Oscillations Damping (FLPOD) Controller for UPFC to Enhance the transient Stability of Multi Machine Power System. i-manager’s Journal on Electrical Engineering, 4(2), 13-19. https://doi.org/10.26634/jee.4.2.1272

Abstract

In today's power production and utilization scenario, various types of problems are faced such as Depletion of fossil fuel sources, Increase in fuel cost, Deterioration of ecological balance due to carbon emission, Transmission and Distribution losses, Higher energy consumption due to poor efficiency drives and increased demand due to development taking place in many areas of the world which were hitherto undeveloped / under developed. Many of these problems can be addressed by adopting suitable technology resulting in energy saving. 'Energy conservation through Energy Efficiency' is the need of the hour and attempting to achieve this by developing higher efficiency motors with Die-cast Copper Rotor Motor (DCR) Technology. This paper covers the author's experiences so far and provides details of efficiency improvements, Energy saving potential ,case studies in the existing Die-cast Aluminium rotor motor (DAR) with the proposed DCR motor, especially in the industrial and agricultural sectors. This paper also includes some of the general Policy approaches for encouraging electrical energy efficiency.

Research Paper

An Adaptive Distance Relay Setting For EHV Power Transmission Lines Using Fourier Transform

P. V. Prasad*
* Professor, Department of EEE, Chaitanya Bharathi Institute of Technology, Hyderabad, A.P.
** Associate Professor, Department of Electrical and Electronics Engineering, UCE, JNTUK, Kakinada, A.P, India
P. Venkata Prasad and S. Sivanagaraju (2010). An Adaptive Distance Relay Setting For EHV Power Transmission Lines using Fourier Transform. i-manager’s Journal on Electrical Engineering, 4(2), 20-27. https://doi.org/10.26634/jee.4.2.1273

Abstract

This paper presents accurate calculation of apparent impedance of transmission lines by distance protection scheme.The apparent impedance equation, considering the transmission line capacitance by utilizing a double p model for a line is derived. The apparent impedance without and with considering the line capacitance is compared by considering the fault resistance. The quadrilateral characteristic of distance relay is compared in both the cases. Simulink model design and adaptive setting for a distance protection with consideration of transmission line capacitance is also investigated using Fourier transform. A 400 kV transmission line with 300km long is used in this study.

Research Paper

Simulation of Multiple Output AC/DC Converter

T. Saravanan* , Rama Reddy**
* Research Scholar, Sathyabama University, Chennai.
** Professor, Jerusalem Engineering College, Chennai, India.
T. Sarvanan and S. Ramareddy (2010). Simulation of Multiple Output Ac/Dc Converter. i-manager’s Journal on Electrical Engineering, 4(2), 28-34. https://doi.org/10.26634/jee.4.2.1274

Abstract

This paper deals with simulation of open loop and closed loop controlled multiple output AC to DC converter using Matlab simulink. The multiple outputs AC to DC converter are capable of giving 12V and 5V DC. This conversion has advantages like reduced transformer size and reduced filter size. The results of closed loop system are presented.

Research Paper

Automatic Generation Control of Interconnected Power System with Static Synchronous Series Compensator (SSSC) Unit Considering Governor Dead–Band and GRC

C.H. Vinothsna* , Ch. SaiBabu**
* Lecturer, JNTUA College of Engineering, Anantapur
** Professor, Department of EEE, University College of Engineering, Kakinada.
*** Associate Professor, Department of EEE, University College of Engineering, Kakinada.
CH. Vinothsna, CH. Sai Babu and S. Sivanagaraju (2010). Automatic Generation Control Of Interconnected Power System With Static Synchronous Series Compensator (Sssc) Unit Considering Governor Dead –Band And Grc. i-manager’s Journal on Electrical Engineering, 4(2), 35-42. https://doi.org/10.26634/jee.4.2.1275

Abstract

The analysis of Automatic Generation Control (AGC) of a two area interconnected power system considering Static Synchronous Series Compensator (SSSC) in series with the tie-line is presented. This paper proposes a new application of one of the sophisticated FACTS (Flexible AC Transmission Systems) devices, i.e. Static Synchronous Series Compensator (SSSC) to stabilize the frequency of oscillations in an interconnected power system. The SSSC located in series with the tie line between any interconnected areas is applicable to stabilize the area frequency of oscillations by high-speed control of tie-line power through the interconnection. The mathematical model of SSSC is derived from its characteristics of power flow control. The idea based on a dynamic control of tie-line power is applied to stabilize the frequency oscillations of inter area mode. Simulation study exhibits the significant effects of the proposed control.

Research Paper

Analysis of Induction Motor Efficiency Enhancement

Sankar S*
Senior Lecturer. Department of Electrical & Electronics Engineering, Panimalar Institute of Technology, Tamil Nadu, India.
S. Sankar (2010). Analysis Of Induction Motor Efficiency Enhancement. i-manager’s Journal on Electrical Engineering, 4(2), 43-46. https://doi.org/10.26634/jee.4.2.1276

Abstract

This paper deals with the possibility of the efficiency improvement for the three-phase, low voltage, squirrel cage motor, using copper for the rotor cage. The analyze was made for single speed, three-phase squirrel cage induction motors with the rated power between 0.55 and 45 kW; 2,4,6 and 8 poles. Both the materials costs increase and the saved energy during the machine life were considered.

Research Paper

Modeling Of Smoothing Reactor for HVDC Transmission System

L. Devi* , Ch. SaiBabu**
* Associate Professor,Intell Engineering College, Anantapur
** Professor, Department of EEE, J.N.T.U.College of Engineering, Kakinada.
*** Associate Professor, Department of EEE, J.N.T.U.College of Engineering, Kakinada
L. Devi, C.H. Sai Babu and S. Siva Nagaraju (2010). Modeling of Smoothing Reactor for HVDC Transmission System. i-manager’s Journal on Electrical Engineering, 4(2), 47-54. https://doi.org/10.26634/jee.4.2.1277

Abstract

The HVDC transmission system is becoming ever more complex, further, demand for reliable supply of electricity is growing, increasing the need for a higher level of system reliability. A probable solution might be to incorporate controllable power components within the system. One such important is smoothing reactor or DC reactor. In this paper the effect of failure rate and repair time on expected capacity level or power transmission capacity of smoothing reactor at different inductance values with one, two and without spares is analyzed and compared. And also effect of number of spares on expected capacity level is presented.