Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Department of Energy and Power Electronics

This paper highlights an effort of incorporating several renewabIes like geothermal power plant (GTP), solar thermal and wind in automatic generation control and analyse its impact along with FACT devices on conventional thermal system. Suitable generation rate constraint for thermal units is considered. Fractional order (FO) Proportional Integral - FO Proportional Derivative (FOPI-FOPD) is used as secondary controller implementing the innovative concept of FO cascade controller. The dynamic performance of FOPI-FOPD controller is compared with the normally used traditional controllers and the controller parameters are optimized by means of the Sine Cosine Algorithm. Superiority of FOPI-FOPD is clearly revealed in the analysis over others. Effect of integrating GTP and other renewables is also highlighted on the thermal system. The performance of interline power flow controller (IPFC) is also evaluated on system dynamics. Observations reflect IPFC in between Linel and Line3 is the optimal location and inclusion of the same improves the system dynamics. System dynamic behavior is studied under 1 % step load perturbation in areal. © 2018 IEEE.

School of Electrical Engineering

Vellore Campus

World University root node

2nd International Conference on Energy, Power and Environment: Towards Smart Technology, ICEPE 2018

Effect of Different Renewables and FACT Device on an Interconnected Thermal System Using SCA Optimized Fractional Order Cascade Controllers

Wireless power transmission (WPT) is becoming an inevitable technology of the 21st century. As the power is transmitted by electromagnetic induction through air medium, the chances of electromagnetic (EM) radiation will be high in the vicinity of the wireless charger. The effect of this radiation can be harmful to human, based on its strength and frequency. Various standards are implemented to fix the radiation limits in the bearable level. Since different standards follow different principles and fixing different limits, the lack of a common scale creates misconception to the manufactures and researchers. This paper discusses in detail about all the existing standards for the WPT applications and comparing it. As the available devices and technologies are relatively delicate and costly, a simplified EM radiation measurement mechanism is presented in the paper. A 100W electric vehicle charger is tested using the method. © 2019 IEEE.

2019 IEEE MTT-S International Microwave and RF Conference, IMARC 2019

Overview of Different WPT Standards and a Simple Method to Measure em Radiation of an Electric Vehicle Wireless Charger

Multi-level converters have gained a reputation in both Medium-Voltage and Low-Voltage applications. To find out the connections among several multilevel Voltage Source Converter (VSC) topologies and to expose in what way to attain innovative topologies. Between them, VSC attained the main market share and taken obvious improvements in the earlier time. The most topical developments in the VSCs is a Modular Multi-level Converter (M-MC). This configuration has a modular structure; power rating and voltage of the converter can be enlarged by accumulating the Sub-Modules (SM) in series. This paper presents the VSC based M-MC of high power converters, which the controller controls the voltage on the load using a PI controller. The simulation results of converter voltage, converter current, grid voltage, grid current, PI error voltage, three-phase instantaneous real power, and reactive power obtained to justify the achievement of the suggested topology. © 2019 IEEE.

Department of Electrical Engineering

VIT Unitversity

2019 Innovations in Power and Advanced Computing Technologies (i-PACT)

VSC Based Modular Multilevel Converter For Grid Applications Using PI Controller

Organic compound of protonated Piperazinediium bis (4-aminobenzoate) dihydrate C4H12N2 2+2(C7H6NO2 −).2(H2O) (PZ4AB) was synthesized and crystal was grown by slow evaporation solution growth technique. Powder X-ray diffraction and High resolution X-ray diffraction studies affirmed the crystalline perfection of the grown crystal. Fourier transform infrared spectral analysis ascertained the frequencies of various functional groups present in PZ4AB crystal. Optical transmittance and optical band gap estimation explored the optical phenomena of PZ4AB crystal. The laser-induced surface damage threshold value of PZ4AB crystal was measured to be 1.0615 GW/cm2 for the 1064 nm Nd:YAG laser radiation. From Thermogravimetric and differential scanning calorimetric studies, the stability of PZ4AB crystal was ascertained. The dielectric manner was endowed as a function of frequency and temperature. The mechanically soft nature of the crystal was assessed by Vickers hardness measurement which exhibited the reverse indentation size effect. The nonlinear refractive index, absorption coefficient and the third-order nonlinear susceptibility of crystal were divulged by Z-scan technique. © 2019

Department of Software and Systems Engineering

School of Information Technology and Engineering

Physics

School of Advanced Sciences

Chennai Campus

Chinese Journal of Physics

Synthesis, crystal growth, and characterization of piperazinediium bis (4-aminobenzoate) dihydrate - An efficient third-order nonlinear optical single crystal for opto-electronic applications

In recent years, many applications have been developed for the integration of renewable energy sources (RES) into the grid in order to satisfy the demand requirement of a clean and reliable electricity generation. Increasing the number of RES creates uncertainty in load and power supply generation, which also presents an additional strain on the system. These uncertainties will affect the voltage and frequency variation, stability, protection, and safety issues at fault levels. RES present non-linear characteristics, which requires effective coordination control methods. This paper presents the stability issues and solutions associated with the integration of RES within the grid.

Fulltext

Energies

Large Scale Renewable Energy Integration: Issues and Solutions

Fuel cell has been considered as one of the optimistic renewable power technologies for the automotive applications. The output power of a fuel cell is immensely dependent on cell temperature and membrane water content. Hence, a maximum power point tracking controller is essentially required to extract the optimum power from the fuel cell stack. In this paper, an adaptive neuro-fuzzy inference system based maximum power point tracking controller is presented for 1.26 kW proton exchange membrane fuel cell system used in electric vehicle applications. In order to extract the optimum power, a high step-up boost converter is connected between the fuel cell and the BLDC motor. The duty cycle of the converter is controlled by using ANFIS reference model, so that the maximum power is delivered to the BLDC motor. The performance of the proposed controller is tested under normal operating conditions and also for sudden variations in the cell temperatures of the fuel cell. In addition to this, to analyze the effectiveness and tracking behaviour of the proposed controller, the results were compared with those obtained using the fuzzy logic controller. Compared to the fuzzy logic controller, the proposed ANFIS controller has increased the average DC link power by 1.95% and the average time taken to reach the maximum power point is reduced by 17.74%. © 2019 Hydrogen Energy Publications LLC

International Journal of Hydrogen Energy

ANFIS-MPPT control algorithm for a PEMFC system used in electric vehicle applications

Energy storage systems are becoming more and more important for integrating higher levels of varying and intermittent renewable power into the grid. As we have energy storages with different characteristics and applications, hybrid storage solutions combining various technologies to meet different applications are fast developing. In this paper, an efficient energy management strategy is proposed for a VRB and Li-ion hybrid battery system to be integrated with a grid-connected wind-PV Hybrid Renewable Energy System (HRES). The operation of the generating system and the storage batteries are evaluated using Matlab/Simulink and techno-economic analysis is carried out. The results demonstrated successful implementation of the hybrid system with improved deliver ability and storage lifetime. © 2019 Elsevier Ltd

Renewable Energy Focus

Integration and energy management of a hybrid Li-VRB battery for renewable applications

This paper proposes a new approach for grid integration of solar photovoltaic system using modified incremental conductance maximum power point tracking algorithm with multi-output converter and multilevel inverter. The multi-output converter is a combination of boost converter and switched capacitor function to generate different self-balanced output voltages using single switch, single inductor, 2N-1 diodes and 2N-1 capacitors. This topology is proposed to be used as DC link in applications where several controlled voltage levels are required with self-balancing and unidirectional current flow, such as photovoltaic (PV) or fuel cell generation systems with multilevel inverter. The utilization of multilevel inverter in the proposed system provides better quality of output voltage and current waveform thereby reducing the size of passive filters. Also, it eliminates the requirement of bulky transformers for grid integration. Multicarrier unipolar phase disposition pulse width modulation technique is employed for triggering the switches of the multilevel inverter. The proposed system is tested with standard test conditions using MATLAB/SIMULINK. © 2019 The Authors. Published by Elsevier Ltd.

Energy Procedia

A new approach for grid integration of solar photovoltaic system with maximum power point tracking using multi-output converter

The usage of renewable energy resources (RES) in energy is receiving great attention as a solution to the problem of a shortfall in electrical energy. Application of RES in a generation system is done with diverse outlines, amongst others in a micro grid system. Employment of micro grid systems offers numerous benefits both for the consumer as well as for the utility provider. Voluminous micro grid expansions are carried out in more than a few countries, because it offers healthier power quality and furthermore it is ecologically friendly. Even though its adoption is growing steadily, there are still several hurdles to proficiently design, regulate, and operate micro grids when linked to the grid, and as well when in the islanded mode, and wide-ranging investigation activities are on-going to confront the issues. It is essential to consider across-the-board opinions of the micro grid amalgamation in a power system network. This paper presents a review of issues in relation to micro grid stability and offers an account of study in areas related to micro grids. © 2017 Informa UK Limited, trading as Taylor & Francis Group.

International Journal of Ambient Energy

State-of-the-art research on micro grid stability: a review

The ever increasing demand for energy is leading to rapid depletion of our resources. Inspite of the advancement in renewable technology. It is therefore important that the available energy conserved and utilized efficiently. In automobiles about 60-70% of energy out of the total heat supplied by fuel is dissipated as waste heat and just about 30 to 40 percent is transformed into useful mechanical work [1-3].This paper focus on the recovery and utilization of waste heat into useful electrical energy by using Seebeck effect where in Thermoelectric Generators (TEG) are placed on the exhaust surface for converting heat directly into electrical energy. Thermoelectric generators are highly doped semiconductor solid state devices. The voltage throughput of the thermoelectric generator is given to a dc super lift converter circuit. The output of the super lift converter is used for battery charging. © 2019 IOP Publishing Ltd. All rights reserved.