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.

Reduced order modelling of ltisystems using invasive weed optimization

Abstract: Reduction of single-input single-output (SISO) continuous time systems into reduced order model (ROM) using invasive weed optimization (IWO) has been presented here. IWO is a novel population based numerical stochastic, derivative free optimization algorithm inspired from the biological growth of weed plants. The objective function is the integral square error (ISE), which has been minimized. The step and frequency responses of both low and high order systems have been compared. Also, the performance of IWO has also been compared with other existing techniques in terms of ISE and transient response parameters. It has been observed that IWO outperforms the existing techniques in literature by giving low value of ISE and better transient response's parameters.

Extracting maximum power from photo-voltaic power generator with unlike PWM pulses

Abstract: Maximization of power, which depends on solar irradiation and temperature conditions, from a photo voltaic (PV) generator is of special interest as the efficiency of the PV module is very low. A maximum power tracker is used for extracting the maximum power from the generator. To be effective with cellular converter architecture, however, a scheme must be able to accommodate a varying number of cells and maintain operation under any climate conditions. Three types of PWM pulses (synchronized pulses, independent pulses, and interleaved pulses), applied to switches, to extract maximum power from PV generator are employed. Quantitative performance comparisons are being presented among synchronized pulses, independent pulses, and interleaved pulses of the converter cells. Simulation is done in MATLAB simulink environment.

Modelling and Analysis of Photovoltaic System with Improved Inverter Technique

Abstract: This paper deals with the recent advances in grid connected photovoltaic (PV) system. It proposes the study of PV system with the grid integration. DC-DC boost converter is used to step-up the PV array voltage. Boost converter with Perturb and observe technique based maximum power point tracking is implemented. Advanced inverter control strategies with grid connected PV system is discussed. Inverter convert dc to ac to control the inverter with respect to grid, a three-phase photovoltaic system with synchronous reference frame is used to lock the grid phase & frequency, three phase PLL is used at the output of inverter. Inverter control maintain constant voltage at output side of inverter and provide synchronization output with the grid. A LC filter is used to reduced high frequency from output side of the inverter and the provide the galvanic isolation between the inverter output and grid with the help of the transformer system providing the quality power. PV characteristics at different temperature and irradiance level is simulatedin MATLAB/SIMULINK.

Design and Analysis of Elliptical Core Spiral Silica Photonic Crystal Fiber with Improved Optical Characteristics

Abstract: The aim of this paper is to attempt an optimized design from spiral horizontal and vertical core slotted silica photonic crystal fiber through which we can get low dispersion profile, low confinement loss and better transmission curve in both the slotted spiral silica PCF structures. For this purpose we have used opti Finite difference time domain (FDTD) (Liao et al. in EEE Photon Technol Lett. https://doi.org/10.1109/LPT.2015.2443986, [9], Bottacini et al. in J Lightwave Technol 22(7), 10]) with transparent boundary conditions (TBC) (Sinha et al. in IEEE J Sel Top Quantum Electron 22(2), [7], Zhang et al. in Opt Lett 35:3829–3831, [8], Liao et al. in IEEE Photon Technol Lett. https://doi.org/10.1109/LPT.2015.2443986, [9], Bottacini et al. in J Lightwave Technol 22(7), [10], Toulouse in J Lightwave Technol 23(11), [11]). In this design initially the core region is selected in horizontal elliptical shape, while the cladding part is maintained in circular shape. Later on the elliptically core is converted into vertical direction keeping the cladding region in circular shape. The core diameter is maintained at 0.25 and 0.5 μm with minor and major axes, while the cladding diameter varied from 0.5 to 1.25 μm. The design so obtained faced many conflictions but after setting the parameters in proper manner, it is ready for getting the optimized results and it also maintained the refractive index (Birks et al. in Opt Lett 22(13):961–963, [1], Liao et al. in IEEE Photon Technol Lett 26(4), [2], Rabiul Hasan et al. in IEEE Photon Technol Lett. https://doi.org/10.1109/LPT.2016.2572141, [3]) of the silica at 1.457.

Control of two interconnected tanks system using event-based control

Abstract: This paper proposes the framework for the event-triggered state feedback control of a continuous plant. Following on emulation based approach event-based control loop is designed to follow the performance of continuous state feedback loop. Event-triggering conditions are designed so that the difference between the event-based control loop and the continuous state feedback remains bounded and there exists a lower bound of inter-execution time between events. The effectiveness of this approach is shown by simulation performed on a chemical process of two interconnected tanks system.