Qualification: 
M.Tech, B-Tech
bharathkr@am.amrita.edu

Bharath K. R. currently serves as Assistant Professor in the Department of Electrical and Electronics Engineering at Amrita School of Engineering, Amritapuri. He has completed B. Tech. in EEE from Amrita School of Engineering, Amritapuri, in the year 2012 and M. Tech. in Embedded Systems from  National Institute of Electronics and Information Technology, Calicut, in the year 2014. He is currently pursuing Ph.D.

Publications

Publication Type: Conference Paper

Year of Publication Title

2020

M. R. Sagariga, Balaram, S., Menon, P., Aiswarya, B., Pramod, D., and Bharath K. R., “Plastic To Fuel Conversion System Using Renewable Energy Assisted Pyrolysis”, in 2020 6th International Conference on Advanced Computing and Communication Systems (ICACCS), 2020.[Abstract]


In the current world, huge amounts of plastic are generated every year. Improper management of plastics like burning it in the open air creates hazardous problems in the environment. Though there has been numerous attempts for repossession of plastics using the present technological advancement, it predominantly emits greenhouse gases and the usage of power for the entire recycling process is sky-high. Pyrolysis technique is another nature friendly attempt to convert plastic to inflammable gas. But this process is an energy intensive mechanism which requires anaerobic decomposition of plastic in presence of catalyst and at very high temperature. To minimise energy intensive nature of the process, renewable technologies are taken in to provide the extreme temperature levels to enable pyrolysis. Fractional Open Circuit Voltage based maximum power point tracking mechanism is adopted in order to convert incident solar energy on solar panels to electric power, and then transforming to heat using appropriate heating element and power conversion system. Proposed method is simulated and implemented using 1kW SPV system and results indicate a considerable reduction in non-renewable energy usage for plastic to fuel conversion as compared with conventional methods.

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2020

C. Sachin, Srihari, S., Prajeesh, K., Prem, N., Sreevasudev, B., and Bharath K. R., “Increasing Accessibility of Electric Vehicles with Joystick Based Drive-By-Wire Model”, in 2020 6th International Conference on Control, Automation and Robotics (ICCAR), Singapore, 2020.[Abstract]


The automotive industry is shifting towards a cleaner alternative: electric vehicles. This change can be utilized to bring about an improvement to the usage accessibility of these vehicles. This paper proposes a way to implement a joystick control in an electric vehicle which can be used to drive the vehicle independently for anyone who has the ability to move and have control over their arms and wrists. The joystick, accessible to the driver, can be used for moving the vehicle in the desired direction. The work proposed here makes use of a drive by wire technology to operate the vehicle. The driving motor is connected to the joystick through a microcontroller. Another motor, which is connected to the steering column through a chain and sprocket, is used to steer the vehicle. This joystick controlled driving ensures that multiple amputees or differently abled people can drive it with ease.

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2019

K. M. M. and Bharath K. R., “A Novel Sensorless Hybrid MPPT Method Based on FOCV Measurement and P O MPPT Technique for Solar PV Applications”, in 2019 International Conference on Advances in Computing and Communication Engineering (ICACCE), Sathyamangalam, Tamil Nadu, India, 2019.[Abstract]


In the era of Renewable Energy, Solar power is considered as one among the prominent and emerging energy source. But the output of a solar PV varies drastically due to varying atmospheric conditions like temperature and solar insolation. The Maximum Power Point Tracking (MPPT) method is an inevitable part which must be present for the efficient utilization of solar energy tapped using solar PV units. The conventional methods fail to trail the maximum available power efficiently and economically, and can even fail during partial shading conditions. This paper proposes an advanced hybrid algorithm that blends the advantages of both Fractional Open-Circuit Voltage (FOCV) MPPT and Perturb and Observe (P&O) algorithm, thereby overcoming their inherited flaws. To validate the proposed algorithm's potency, the technique is simulated using Simulink environment on MATLAB and simulation results show a clear improvement in achieving the MPPT under varying atmospheric conditions.

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2018

R. Kodoth, Harikrishnan, T., Bharath K. R., and Kanakasabapathy, P., “Design and Development of a Resonant Converter Adapted to Wide Ouput Range in EV Battery Chargers”, in 2018 3rd IEEE International Conference on Recent Trends in Electronics, Information Communication Technology (RTEICT), 2018.[Abstract]


The interest on Electric Vehicles (EV) have increased nowadays on behalf of the global threat of fossil fuel depletion and increasing environmental effects due to the usage of those fuels. The EV battery has to cope up with time to time power variations and the charging profile is also different with that of other batteries. Hence a battery charger which can provide wide output voltage according to the demand is needed for EVs and such a charger is proposed in this paper. The design and development of a resonant LLC dc-dc converter is explained where this type of converters can work in higher frequencies thus reducing the size of the involved components and can execute soft switching techniques so as to increase the efficiency of the system. A 30kW battery charger is designed and the effectiveness of the system is verified by MATLAB/SIMULINK.

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2018

P. D. Kumar, Jayan, V., Amaya, V., Gireesh, C. V. Sai, Bharath K. R., and Dheerai, K. S., “Side Stick Control of Vehicles for Physically Challenged People”, in 2018 3rd IEEE International Conference on Recent Trends in Electronics, Information Communication Technology (RTEICT), Bangalore, India, 2018.[Abstract]


This paper deals with the implementation of Side Stick based steering system which enables a driver to operate a car with virtually zero force or little movement of a hand. It even facilitates a person having one hand and no legs to conveniently drive the car. The system proposed in this paper mainly focuses on drive by wire technology incorporated with conventional driving techniques to ensure safety of the driver during any emergency situations. This makes the driving more convenient and easier. Its economical use of components makes it more advantageous compared to the existing technology. This work is intended to present a micro-controller-based algorithm for controlling the steering using a Side Stick. It also includes calculations for motor selection. In addition, a mechanical set up for coupling the motor with the steering of a model car is also discussed in this work. Results and analysis of the proposed system is included in the later sections of this paper.

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2018

D. K. Dileep and Bharath K. R., “Conditional Battery Charging in Solar PV Based System”, in 2018 3rd IEEE International Conference on Recent Trends in Electronics, Information Communication Technology (RTEICT), Bangalore, India, 2018.[Abstract]


Insolation, temperature and array voltage largely affect the electric power received from the solar arrays and battery voltage, state of charge (SOC) and charging current affects the battery operation and its lifetime. Therefore it is needful to control the operating points by looking into both the battery parameters and the maximum power operating points from the solar array. The objective of this paper is to introduce additional control along with the maximum power point tracking (MPPT) control so as the power drawn from the solar panel can be adapted in a way to charge the battery as per the standard charging mechanism. The controller thus developed can be applied to the power processing units that are provided in appliances connected directly to the PV system. The simulation results of the buck converter with the proposed control strategy are successfully brought about by using MATLAB/Simulink.

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2018

D. K. Dileep and Bharath K. R., “A Brief Study of Solar Home Inverters”, in 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT), Kannur, India, 2018.[Abstract]


In every field of human development, electricity usage is increasing promptly. Utilization of solar energy is a way to meet the energy demand. The solar inverter is one such device, which makes the solar energy to usable form. In this paper, three major classifications of inverters are presented. The voltage source and current source inverters, stand-alone and grid-connected inverters and, square, modified square and sine wave inverters come under the classification. An open loop strategy is considered for the MATLAB Simulation of the three main types of PWM inverters available in the market. A brief description of PV array, charge controller and battery is also presented in this paper.

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2018

H. Choutapalli, Bharath K. R., and Dr. P. Kanakasabapathy, “A Review on Advanced MPPT methods for SPV system under Partial Shaded Conditions”, in 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT), 2018.

2018

Bharath K. R., Kodoth, R., and Dr. P. Kanakasabapathy, “Application of Supercapacitor on a Droop-Controlled DC Microgrid for Surge Power Requirement”, in 2018 International Conference on Control, Power, Communication and Computing Technologies (ICCPCCT), 2018.

2017

B. V. Patir, Sampath, L. P. M. I., Bharath K. R., Krishnan, A., and Eddy, Y. S. F., “Bernstein global optimization approach for distributed optimal power flow problem incorporating emission costs”, in 2017 International Conference on Technological Advancements in Power and Energy ( TAP Energy), Kollam, India, 2017.[Abstract]


This paper proposes a distributed architecture for solving the optimal power flow (OPF) problem i n power systems operation. Specifically, a centralized solution approach (to solve single optimization problem) presented in the literature is posed as solving different local optimization problems. The Bernstein global optimization approach is used to solve these local optimization problems in a co-ordinated and distributed fashion. The proposed approach is implemented on a typical 3-bus power system, wherein the cost of CO 2 emissions is also considered. The overall results obtained are satisfactory.

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2017

Bharath K. R., Sivaraman, G., Harivishnu, B., and Haridas, M. P., “Design and implementation of electric speed booster and kinetic energy recovery system for electric vehicle”, in 2017 International Conference on Technological Advancements in Power and Energy ( TAP Energy), Kollam, India, 2017.[Abstract]


Electric vehicle is one of the major technological innovations of this century which has already shown immense potential to change the course of human transportation system. This paper focuses mainly on the design and implementation of an electric speed booster which includes an ultra-capacitor bank, a regeneration system, a solar charging system and a traction system. In this paper, an ultra-capacitor bank is charged through both regeneration as well as the solar charging system to act as a surge power source for speed boosting. Necessary converters and rectifiers have been employed for conversion of the energy for charging the capacitor bank. The ultra-capacitor bank has been connected in conjunction with a battery bank, both of which are used to support the DC bus that electrically drives the drive train. A toggle switch is employed for initiating speed boost mechanism in the vehicle. The system operates such that the ultra-capacitor-battery combination works as a range extender when speed boost is switched off and as a speed booster when it is switched on. Such a system has shown to further improve the efficiency and performance of the system. Performance analysis is carried out and results are provided in the later section of this paper.

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2017

Bharath K. R., Student, A. D., and Dr. P. Kanakasabapathy, “A simulation study on modified droop control for improved voltage regulation in DC microgrid”, in 2017 International Conference on Intelligent Computing, Instrumentation and Control Technologies (ICICICT), Kannur, India, 2017.[Abstract]


In a standalone DC microgrid connected with multiple renewable resources and storage elements, parallel dc-dc converters are more commonly used as interfacing unit between renewable energy sources and load. Current is shared between various power converters which are connected in parallel fashion to maintain a stable DC voltage in the grid. In order to ensure better load sharing in DC microgrid applications, droop control technique is more commonly used. But this control technique cannot ensure a decent level of voltage regulation. In order to address this problem, an improvisation is made in the conventional droop control strategy to obtain a better voltage regulation. This in turn improves the reliability of the system under various conditions. Proposed control technique is simulated and results are provided in this paper.

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2016

Bharath K. R. and Dr. P. Kanakasabapathy, “Implementation of enhanced perturb and observe maximum power point tracking algorithm to overcome partial shading losses”, in 2016 International Conference on Energy Efficient Technologies for Sustainability, ICEETS 2016, 2016, pp. 62-67.[Abstract]


Maximum power point tracking is a method to trap maximum available power from a solar panel. Many algorithms have been developed based on the characteristics of solar panel in order to utilize maximum available power. But these algorithms do not consider local maxima and minima in the solar panel characteristics caused due to shading. In this paper an enhanced version of Perturb and Observe maximum power point tracking algorithm is explained which also considers local maxima and minima caused by shading and makes the solar panel to work at its peak maxima. This helps in improving the overall efficiency of the system. Algorithm is implemented on 50W solar panel using ATMega 8 microcontroller and a boost converter. More »»

2011

Rajesh Kannan Megalingam, Krishnan, A., Bharath K. R., and Nair, A. K., “Advanced Digital Smart Meter for Dynamic Billing, Tamper Detection and Consumer Awareness”, in ICECT 2011 - 2011 3rd International Conference on Electronics Computer Technology, Kanyakumari, 2011, vol. 4, pp. 389-393.[Abstract]


Developing countries are struggling to meet the electric power demands of fast expanding economies. Added to this is the poor infrastructure which has not kept pace with the increasing demand. Quality of supply too is gaining in importance. Poor metering and billing has rendered huge losses for utilities. Tampering and fraud is also rampant. Introducing Advanced Metering Infrastructure will go a long way in mitigating many of these problems. This paper details the development of Advanced Metering Infrastructure incorporating features to monitor supply parameters and perform functions like real time billing and alerts against overvoltage and overcurrent. The proposed meter is to utilize the capabilities of ADE7758 IC as well as microcontrollers such as ATMega16. © 2011 IEEE.

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PDF iconadvanced-digital-smart-meter-dynamic-billing-tamper-detection-consumer-awareness.pdf

Publication Type: Journal Article

Year of Publication Title

2019

Bharath K. R., Krishnan, M., and Kanakasabapathy, P., “A Review on DC Microgrid Control Techniques, Applications and Trends”, International Journal of Renewable Energy Research, vol. 9, pp. 1328-1338, 2019.[Abstract]


The DC Microgrid concept has been flourishing in the recent times due to its intrinsic advantages like Renewable Energy Source (RES) compatibility, easier integration with storage utilities through Power Electronic Converters (PECs) and distributed loads. In-depth researches are going on in this field, as the concept of DC Grid can be considered as a master foundation in the realization of Smart Grid (SG) technologies. To achieve this, a number of constraints such as voltage regulation, islanding detection, allowable transient levels, etc. are to be met in accordance with globally accepted standards. The system should have a proper control scheme to keep the things reliable, fault-free and interoperable. In order to meet the constraints as per globally recognized standards, quite a few classes of control algorithms are adopted namely, Centralized, Decentralized and Distributed control. A standardized review of these control strategies is discussed as part of this work. A comparative study among these techniques is made so as to help a designer to choose the apt technique for controlling the microgrid.

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2018

B. T.G, Anil, M., Bharath K. R., Raj, V., Krishna, A., and Mohan, D., “Design and Implementation of Power Electronic Transformer for Inertial Measurements of Civil Aircrafts”, International Journal of Electrical, Electronics and Data Communication, vol. 6, no. 7, pp. 14-17, 2018.[Abstract]


The services that the aircraft supply has to satisfy increases with increase in size of the aircrafts. Most aircrafts
use 120V, 400Hz AC supply, but the aircrafts may have multiple voltage requirements in order to power various components
in aircrafts. Usually transformers, rectifiers and inverters are used to modify the supply voltage according to the requirement.
The main objective of implementing the power electronic transformer (PET) is to replace the ordinary low frequency
transformers as it offers several benefits like reduction in size and weight. So that only less energy needs to be stored in the
transformer core per cycle, so the core can be made smaller. Reduction in size is always ideal for aircrafts considering safer
operation of aircrafts. Implementation of PETs for inertial measurements of civil aircrafts helps in solving low power factor
problems and size reduction. In this paper, the practical design and application of a power electronic transformer for inertial
measurement of civil aircrafts is done.

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2018

Bharath K. R., M.K, S., Sivaraman, G., and Reddy, B., “Composite braking module for an electric vehicle”, International Journal of Engineering & Technology, vol. 7, p. 772, 2018.[Abstract]


The efficycle, is a hybrid tricycle which runs on manual and electric power. This paper proposes a method to design a braking load to dissipate the excess energy produced when there is no more requirement for the battery to be charged by regenerative braking. This module was designed for an operating voltage of 8V, resistance value of 0.16 ohm and with a maximum current capacity of 200 A. This resistor was coupled with a buck converter to step down the voltage across the battery to a value convenient for operation of the dissipation resistor.

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2018

Bharath K. R., H, C., and Dr. P. Kanakasabapathy, “Control of bidirectional DC-DC converter in renewable based DC microgrid with improved voltage stability”, International Journal of Renewable Energy Research-IJRER, vol. 8, 2018.[Abstract]


Providing a stable voltage at the nominal level according to universally accepted standards is a primary concern of any public electricity network. In a renewable energy fed power electronic based DC microgrid system, renewable sources can have fluctuating power characteristics due to various environmental factors. In such an environment, chances of voltage instability are highly probable due to varying power nature of renewable sources and loads connected. In this paper, a bidirectional converter connected with a battery storage is controlled based on the voltage of the microgrid in order to tackle the aforementioned problem. A selector based control algorithm in conjunction with a proportional-integral controller is used to trigger the bidirectional converter. Proposed control technique is simulated in a 60V DC microgrid and results are provided.

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2017

Bharath K. R. and Suresh, E., “Design and implementation of improved fractional open circuit voltage based maximum power point tracking algorithm for photovoltaic applications”, International Journal of Renewable Energy Research, vol. 7, pp. 1108-1113, 2017.[Abstract]


To tap maximum available power from a non-linear energy source such as solar panel, maximum power point tracking (MPPT) algorithms are used. This paper presents an improvised version of fractional open circuit voltage based MPPT algorithm. Maximum power point of non-linear input source varies with various parameters. In the case of a solar panel, maximum power point fluctuates based on the variations in the temperature and light intensity. Hence the conventional fractional open circuit voltage based MPPT algorithm fails to extract maximum available power from the system. Based on the new algorithm presented in this paper, maximum power point tracking is possible even during the variation of temperature and irradiance received in the solar panel. Algorithm is implemented using a 250W solar panel and results are discussed in the later section of the paper.

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