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Cu(In, Ga)Se2 (CIGS) is a chalcopyrite based semiconductor used as a very promising material for high performance thin film solar cell applications. In this research work, numerical analysis of ultra thin CIGS solar cell towards the possibility of ultra thin layer of CIGS absorber has been performed by using wxAMPS simulator to examine the performance of the proposed cell. The main focus of this work...
Band-pass filter design based on Half Mode Substrate Integrated Waveguide (HMSIW) has been presented in this paper. The PEC surface of the HMSIW has been etched with periodic F-shaped Electromagnetic Band Gap (EBG) structures to obtain the bandpass characteristics. Single and array of three similar elements are used which effectively serves the purpose of reduced the Insertion Loss within the transmission...
This work investigates the performance of an Active Front-End (AFE) Rectifier with direct and quadrature axis current control method. Most of the research works describe that the controller for an AFE Rectifier requires three Proportional-Integral (PI) controllers to regulate DC voltage, d-axis and q-axis current. Normally, the outer loop for DC voltage control requires high gain value to stabilize...
Paper deals with development and implementation of nonlinear model predictive control (NMPC) techniques to determine optimal temperature and flow control strategies for a scale down industrial pneumatic conveying and drying system in order to achieve an improved drying characteristics and quick transportation of materials. In this paper predictive control approach is employed using a multivariable...
Accurate and reliable fault detection in three phase induction motors is of great importance from economical perspective. This paper deals with the modeling of five different stator faults, viz. Single Phasing, Single line to ground fault, over-voltage, under-voltage and voltage unbalancing. As part of data acquisition, stator phase current values are recorded during healthy condition as well as during...
This paper presents a modified Hammerstein-Hammerstein nonlinear online identification method for an industrial air pre-heating furnace involves drying and conveying of materials, by relating set point, error signal, the control variable and process variable in a systematic manner using the prediction error framework. The method developed here to address the gray HammersteinHammerstein estimation...
This paper presents a software tool that allows the detection, localization and classification of PQ events based on Wavelet Transform and Support Vector Machine algorithms.
One of the most important tasks in industries is considered to be the condition monitoring of induction motors. However, most of the traditional methods employed for this purpose suffer from certain limitations in accomplishing this task. A successful implementation of condition monitoring requires the development of a simple but reliable detector of various faults. This paper investigates the performance...
This paper presents a simple, efficient and reliable method to obtain extremely fast load flow solutions using Power Perturbation method. The proposed method shows its effectiveness with minimum number of iterations along with high accuracy on conventional load flow methods like N-R (Newton-Raphson) method. The proposed method has been applied on different IEEE 5 bus, 14 bus, 30 bus, 57 bus and 118...
Computation of load flows is the most fundamental power system operation and planning problem. In large power system, nodal voltage method of network solution using admittance matrix is preferred. In order to study its parallel algorithms, which improve operation efficiency, enhancement of real-time control and timely decision support, an improved load flow method based on perturbation theory has...
This paper proposes an efficient and reliable method based on perturbation method is developed which provides a smarter solution with minimum number of iterations along with high accuracy and less time. The developed method is tested on different standard IEEE 5 bus, 14 bus & 30 bus systems to show its effectiveness & efficiency.
This paper presents a new approach of steganography. The secret image is firstly perturbed by Stego-Key (SK) and again perturbed by a genetically generated, good, session based transposition operator (TO). In the next step this perturbed secret image is embedded within the host image by variable bit replacement using a hash function. At the time of extraction of secret image firstly perturbed image...
It is well known that during long mission at low Earth orbit (LEO) as well as geosynchronous Earth orbit (GEO), electromagnetic radiation such as proton, gamma rays, alpha particles etc. creates severe damages to space electronics equipment as well as structural materials of spacecraft. In this context, present study investigates the rationale to developing space materials which could be useful as...
The objective is to investigate the relative advantages and performance of grid based method. To achieve this, the grid-based method was compared with one of the known optimal filter i.e. Kalman filter. First two linear system models were tested by using these two methods. One was 1st order system and another was 2nd order system. The results obtained by these two methods were then compared. Again...
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