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


Volume 11 Issue 2 October - December 2017

Research Paper

Effects of Ambient Temperature On Correlated Colour Temperature of Light Emitting Diodes

Aniruddha Mukherjee* , M. K. Gupta**
* Department of Electrical Engineering, Suresh Gyan Vihar University, Jaipur, India.
** Professor, Department of Electrical Engineering, Suresh Gyan vihar University Jaipur, India.
Mukherjee, A., and Gupta, M. K. (2017). Effects of Ambient Temperature On Corelated Colour Temperature of Light Emitting Diodes. i-manager’s Journal on Electrical Engineering, 11(2), 1-6. https://doi.org/10.26634/jee.11.2.13850

Abstract

It has been well established that light emitting diode shall invariably replace incandescent lamps and compact fluorescent lamps in smart cities. However one important aspect that needs to be addressed in the context of light emitting diodes and dimming is degradation of Correlated Colour Temperature (CCT). Dimming will alter the temperature at the junction and T-point. Thus any changes in light intensity will finally bring changes in the temperature. Subsequently with changes in T-point temperature CCT also changes. The degradation of CCT will implicate the quality and quantity of light delivered by LED. In LEDs apart from ambient temperature test point or commonly referred as T-point temperature also plays a vital role as it depicts the solder point temperature of the device. In this paper, an attempt has been made to work out a relation between the T-point temperature and CCT. This relation will provide sufficient insight to the manufacturers. Furthermore, the aspect of quality lighting is also required to be dealt in smart lighting. This work primarily offers substantive information regarding the change in CCT with corresponding changes in T-point and ambient temperature.

Research Paper

Performance Validation of Brushless Resolver and Implementation with Ad2s1210a RDC Converter

Dommeti Rajesh* , Gautam Moni Patro**, P. Mallikarjuna Rao***
*-** Scholar, Department of Electrical Engineering, AUCE(A), Andhra University, Visakhapatnam, India.
*** Professor, Department of Electrical Engineering, AUCE(A), Andhra University, Visakhapatnam, India.
Rajesh, D., Patro, G. M., and Pasumarthi, M. R. (2017). Performance Validation of Brushless Resolver and Implementation with Ad2s1210a RDC Converter. i-manager’s Journal on Electrical Engineering, 11(2), 7-15. https://doi.org/10.26634/jee.11.2.13852

Abstract

Position feedback requires precise and repeatable indication of rotor position for any closed loop control system. In case of Robotics, motion control devices and multiple pole motors require high sensitivity of the rotator position without any time lapse. Modern motion control methods provide an accurate, fast rate, and low costposition feedback with greater flexibility than older sensing methods. The Resolver technology has been used in an industrial environment for many years in angular position transducers applications. Resolvers are highly robust in nature of operation, and can work even in places, where other electronics based encoders, potentiometers fail. A Brushless resolver is basically rotating transformers integrated with built in two phase machine as rugged as the motor and withstands for High speeds with optimum resolutions. Recent progression in the high resolution R/D converter (RDC) chip technology provides an accurate feedback with reliability and Higher resolution. In this paper, a brushless resolver performance was presented with latest AD2S1210 RDC and 16 bit output interface to dSPIC30F Microcontroller. Also a mathematical model for Resolver and RDC are developed to establish the theoretical performance of the setup.

Research Paper

Improving Stability in Hydel Power System Using Ant Colony Optimized Tuned Controller

Mahesh Singh* , D.D. Neema**, R. N. Patel***
* Research Scholar, Department of Electrical Engineering, Swami Vivekananda Technical University, Bhilai (C.G.), India.
** Professor, Department of Electrical Engineering, CIT, Rajnandgaon (C.G.), India.
*** Professor, Department of Electrical and Electronics Engineering, SSGI (Shri Shankaracharya Technical Campus), Bhilai, India.
Singh, M., Neema, D. D., and Patel, R. N. (2017). Improving Stability in Hydel Power System Using Ant Colony Optimized Tuned Controller. i-manager’s Journal on Electrical Engineering, 11(2), 16-25. https://doi.org/10.26634/jee.11.2.13851

Abstract

There are different types of disturbance in power system like switching, transient, load variation, etc., which affects stability and efficiency of power system. These disturbances cause fluctuation at low frequency which are unacceptable, as they decrease the power transfer capability in transmission line and unstable mechanical shaft load. In order to compress low frequency oscillation, a common solution is the use of Power System Stabilizer (PSS). This paper provides Ant Colony Optimization (ACO) algorithm based approach for robust and optimal design of power system stabilizer proposed for the single machine infinite bus hydro governor turbine generator. The proposed design of the controller is formulated as a parameter optimization problem based eigenvalues, damping ratio, and time domain analysis. The simulation results by proposed design approaches when compared with conventional PSS show better results.

Research Paper

Analysis of Certain Multi Objective Aspect For Distribution Systems in The Presence Of CapacitorsUsing Modified Optimization Algorithm

CHINTALAPUDI* , M. S. Ravikumar**, U. Ramanaiah***, S. Siva Nagaraju****
* Professor, Department of Electrical and Electronics Engineering, VVIT, Guntur, India.
** Professor, Department of Electrical and Electronics Engineering, LBRCE, Vijayawada, India.
***Assistant Professor, Department of Electrical and Electronics Engineering, VVIT, Guntur, India.
**** Professor, Department of Electrical and Electronics Engineering, UCEK, JNTUK, Kakinada, India.
Suresh, C. V., Giridhar, M. S., Ramanaiah, U., Sivanagaraju, S. (2017). Analysis of Certain Multi Objective Aspect For Distribution Systems in The Presence Of Capacitors Using Modified Optimization Algorithm. i-manager’s Journal on Electrical Engineering, 11(2), 26-40. https://doi.org/10.26634/jee.11.2.13853

Abstract

This study proposes a novel framework to analyze the multi objective optimization aspects of distribution system in the presence of capacitors. This study associated with the economical and technical aspects of the system by means of net savings, voltage deviation, and section current index objectives. The system in the presence of capacitors exhibits efficient performance, for this, an optimal placement strategy is presented based on power loss indexes and total power losses using proposed modified cuckoo search algorithm. In order to explore the problem more realistically and to solve multi objective optimization problem in the presence of capacitors, a novel methodology based on non-dominated sorting and fuzzy decision approaches is proposed. The feasibility and effectiveness of the proposed method are examined on standard 15-node, 33-node, and 69-node test systems. According to the analytical results, the proposed framework in the presence of capacitors enhances the system performance more effectively [14].

Review Paper

A Perspective on Wind Turbines For Electric Power Generation

M. Faisal Khan* , M. Rizwan Khan**
* Assistant Professor, University Polytechnic, Faculty of Engineering & Technology, AMU, Aligarh, India.
** Professor, Department of Electrical Engineering, Aligarh Muslim University, Aligarh, India.
khan, M. F., and khan, M. R., (2017). A Perspective on Wind Turbines For Electric Power Generation. i-manager’s Journal on Electrical Engineering, 11(2), 41-54. https://doi.org/10.26634/jee.11.2.13854

Abstract

Wind energy is expected to contribute substantially to realize the sustainable development goals 2030 of the United Nations (UN). Substantial growth in global installed capacity of electric power generated from wind in the past decade has lead to corresponding upsurge in the research on Wind Energy Conversion Systems (WECS). This study endeavours to discuss various issues pertaining to the WECS. Fundamental terms of wind turbines, their types, application wise suitability, and the operational features are elaborated. Details regarding the blade designs and the aerodynamics are explained through necessary mathematical modeling. Also, a perspective is presented on various types of generators suitable for WECS along with specific attributes and shortcomings of each. The feasibility of multi-phase self excited induction generators for wind energy application is demonstrated through experimental results of six and nine phase variants.