Vishnu Kalaiselvan Arun Shankar

Bio: Vishnu Kalaiselvan Arun Shankar is an academic researcher from VIT University. The author has contributed to research in topics: Inverter & Direct torque control. The author has an hindex of 2, co-authored 5 publications receiving 130 citations.

Experimental Investigation of VFD-Fed Scalar Control of Induction Motor for Pumping Application

Abstract: In this proposed paper, the experimental results on variable frequency drives (VFDs)-fed pumps are taken out into considerations that are obtained from the laboratory set-up and the modelling done by the author. The simulation study of induction machine using the speed control technique V/F for pumping application is made. To survey the drive performance, VFDs manufactured by Danfoss, with their own control system is used as a special planned simulator. The aim of this paper is to compare and evaluate the results taken out in laboratory and MATLAB/Simulink for an effective pumping system. The simulation and experimental results shown in the article are used to determine the performance of pumping system.

Common-Mode Voltage Regulation of Three-Phase SVPWM-Based three-Level NPC Inverter

Abstract: This paper presents the implementation of the modulation strategy to balance the neutral point potential (NPP) in three-level NPC inverters. This method employs the space vector pulse width modulation technique which gives the strong regulating ability of common-mode voltage of DC link capacitors. Apart from balancing the dc bus voltage this paper also examines the switching losses and junction temperature associated with the three-level inverters. The comparison of three-level inverter with two-level inverter, on the basis of switching losses, has also been explored. The performance of the modulation strategy to balance NPP has been validated and verified using MATLAB/Simulink.

Survey of Power Quality Discrete Disturbances in an Educational Institution

Abstract: There are number of studies based on power quality events, but very few literatures are focused only on the discrete disturbances which also known as events of power quality disturbances. To answer several questions about the discrete disturbances, the power quality survey was conducted at VIT University, India. This survey intended to lay out information related to power quality disturbances mainly focused on swells, dips, transients, rapid voltage changes, voltage interruptions, and other parameters. The result from the survey will give a better knowledge and understanding about the above parameters.

Solar PV-Based VFD Fed Permanent Magnet Synchronous Motor for Pumping System

Abstract: This paper determines the incorporation of photovoltaic source and battery with a PMSM motor fed with a centrifugal pump based on conventional Direct Torque Control technique (DTC). For the boosting of solar output, interleaved DC-DC converter with fuzzy logic-based MPPT control is studied and in order to convert the DC output of converter for the required form of motor input, three-phase inverter has been taken. With the help of a bi-directional converter, regulation of battery is carried out which depends on load and source. Output results of motor as well as pump are obtained using MATLAB Simulink environment.

Dynamic modelling of a pv pumping system with special consideration on water demand

Abstract: The exploitation of solar energy in remote areas through photovoltaic (PV) systems is an attractive solution for water pumping for irrigation systems. The design of a photovoltaic water pumping system (PVWPS) strictly depends on the estimation of the crop water requirements and land use since the water demand varies during the watering season and the solar irradiation changes time by time. It is of significance to conduct dynamic simulations in order to achieve the successful and optimal design. The aim of this paper is to develop a dynamic modelling tool for the design of a of photovoltaic water pumping system by combining the models of the water demand, the solar PV power and the pumping system, which can be used to validate the design procedure in terms of matching between water demand and water supply. Both alternate current (AC) and direct current (DC) pumps and both fixed and two-axis tracking PV array were analyzed. The tool has been applied in a case study. Results show that it has the ability to do rapid design and optimization of PV water pumping system by reducing the power peak and selecting the proper devices from both technical and economic viewpoints. Among the different alternatives considered in this study, the AC fixed system represented the best cost effective solution.

Control and energy management strategies applied for solar photovoltaic and wind energy fed water pumping system: A review

Abstract: Pumping of water requires excessive energy for its operation by consuming a massive amount of diesel, gasoline, electric power etc. The more promising alternative energies to perform the same operation without any energy cost are solar photovoltaic (PV) and wind. These fastest growing renewable energies are more reliable and well suitable for remote villages where there is no possibility of extending transmission lines. Furthermore, these systems are optimal for conditions like only small amount of water needed to be pumped for a particular time. Unlike conventional energy sources of electric power, the renewable energy sources are not dispatchable its power output cannot be controlled. In that case, it involves power conversion stages so that it would necessitate to design an advanced control strategy technique. Those control strategies greatly avoid and protects the system from detrimental operating conditions by monitoring input voltage, water flow, torque, power, pressure, speed and motor vibration etc. Henceforth the use of efficient control strategy not only increase the performance of system it also helps to increase the number of operational hours of solar PV and wind energy systems. In this manuscript, the research work of various control strategies carried out in solar PV and wind energy-based water pumping systems are presented. Additionally, this paper intends to discuss the energy management strategies applied for renewable energy fed water pumping system when the system assisted with third energy system (battery bank, fuel cell, etc). These benefited systems ensure good design, guarantees the control speed required for the motor, regulates the flow of water, assuring accurate operation for all conversion and finally, it maintains precise balance in between the renewable energy generated and power required by the load (pump).