Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Analysis of boost converter with input source power conditioning

Abstract: A single phase boost converter in both discontinuous inductor current mode (DICM) and continuous inductor current mode has been dealt in order to reduce total harmonic distortion (THD) of source side current and improve power quality of source. Results obtained by proposed technique have been compared with the conventional rectifier operation. The proposed schemes have been simulated on MATLAB/SIMULINK environment. The simulation results show that conventional rectifier has produced 215% of THD while DICM and CICM introduced 31% and 9% of THD, respectively. Power factor (pf) obtained by DICM and CICM are found to be 0.95 and 1 (unity) by which it can be concluded that the maximum percentage reduction in THD and better pf are obtained by proposed CICM technique and then DICM technique as compared to conventional technique which in turn improve overall power quality of system under investigation.

Power Quality Enhancement of Soft Computing FLC MPPT Based Standalone Photovoltaic System

Abstract: Single phase system has been secured with Photovoltaic system based on Fuzzy Logic Control based perturbed & observed (P&O) maximum power point tracking phenomenon with active power filter (APF) connected to a nonlinear load. The conventional Perturbed & Observed algorithm is used to achieve maximum power output from Photovoltaic array, Proportional Integral controller with positive sequence detector phase locked loop(PLL) synchronization are implemented to generate reference current. It is emplyed to generate switching signal for VSI in hysteresis band current controlled (HBCC). DC link of PWM converter is controlled with switch controlled of VSI inverter. In proposed work minimize harmonic distortion present in source current due to power electronic based nonlinear load. Total current harmonic distortion (THD) is reduced by shunt active power factor and power factor improve after compensation reactive power supplied by system reduce and active power of system increase. The system designed with MATLAB/SIMULINK 2015(a) platform.

Source Detection of Oil Spill using Modified Glowworm Swarm optimization

Abstract: Crude oil has become very important source of energy. It is used by industries for supplying energy, providing fuel for vehicles etc. It is carried by submarines pipelines, ships and tankers to industries. Due to carelessness of human beings or natural disaster oil gets leaked from pipelines or ships and goes into the ocean. The oil in the ocean imposes danger to marine lives. In this paper, the source of oil spill is detected through swarm robots along with the use of swarm intelligence algorithm i.e. Modified Glowworm Swarm optimization(MGSO) Algorithm. In this algorithm, we use variant step size on the static function profile (instead of fixed step size) to speed up the convergence rate. The result gives better performance if number of iteration and number of s-bots get decreased. The comparison of analysis is done by using some benchmark function and evaluation measures on the basis of PCR(Peak Captured Rate). The maximum number of sources of oil spill is identified. In future work, this algorithm will work on real time for measurement of wind effect and also formed boundary of oil spill for cleaning process through swarm-bots.

Performance Evaluation of 3-Phase 4-Wire SAPF based on Synchronizing EPLL with Fuzzy Logic Controller

Abstract: This paper work focuses on current harmonic cancelation, reactive power compensation, neutral current compensation and power factor adjustment in a 3 phase four wire (3-ph-4w) system using shunt active power filter (SAPF) by incorporating synchronizing EPLL with fuzzy logic controller. The proposed system designed with non-linear uncontrolled rectifier feeding with R-L load, eight IGBT switch for current controlled voltage source inverter, interfacing inductor and DC bus capacitor. Hysteresis controller generates pulses for CI-VSI. The synchronizing EPLL generate sine cosine signals exercised to generate unit vector for reference current generation in SAPF to suppress harmonics. EPLL has advantage over traditional PLL is to maintain same phase between input signal and output signal of voltage controlled oscillator (VCO). Artificial intelligence technique based fuzzy logic controller has incorporated for DC bus voltage regulation. Proposed system is designed under MATLAB/SIMULINK platform 2015(b). The simulation study shows that proposed system mitigate harmonics and improve power quality with efficacy.

Measurement Analysis of Ultra-Wideband Monopole Antenna With Defected Ground Structure

Abstract: This article describes how a compact, low profile Ultra-wideband (UWB) monopole antenna with a defected ground structure is designed and demonstrated experimentally. The design and experimentation activities have been carried out with the help of a CST Microwave studio tool. The UWB characteristics of the proposed antenna are achieved with a modification of the ground structure of the referenced antenna with novel L shaped defected ground structure (DGS). Both antennas are fabricated on the same substrate with the dimensions of 28.3 x 24 mm2. The comparative analysis of the results for both antennas clearly indicate that the proposed UWB monopole antenna enhanced the impedance bandwidth from 3.7 GHz – 14.9 GHz without DGS and to 3.4 GHz – 20 GHz with DGS. The enhanced bandwidth, constant group delay and good radiation characteristics of the proposed antenna have identified it as a good candidate for portable UWB applications. KEyWoRDS Defected Ground Structure, Group Delay, Radiation Efficiency, Ultra-Wideband