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

Lekshmi R. Chandran currently serves as Assistant Professor in the Department of Electrical and Electronics Engineering at Amrita School of Engineering, Amritapuri. She has completed  B. Tech. in  EEE  from Amrita School of Engineering, Amritapuri in the year 2011 and  M. Tech. in Power Electronics from  Amrita School of Engineering  in the year 2013.

 

 

Publications

Publication Type: Conference Paper

Year of Publication Publication Type Title

2017

Conference Paper

C. C. Chandrasekhran, R.Chandran Lekshmi, and A. Rajendran, “Power flow control in low voltage AC microgrid using photovoltaic system and battery energy storage”, in 1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016, 2017.[Abstract]


An ac micro grid mainly consists of distributed generators an energy storage system and loads where the coordinated power management between these elements should be properly done in order to ensure efficient utilization of renewable energy resources. Since the renewable energy sources are inherent sources of supply the energy storage system plays an important role in managing the power flow between each and every elements of the microgrid by keeping the SoC of the ESS under safe region. In this study an autonomous power flow is proposed which is done through bus signaling method and the SoC conditions of ESS. The proposed control algorithm uses local controllers for regulating the bus voltage and frequency of the microgrid. Hence basic power management and voltage and frequency regulation is done within the microgrid. © 2016 IEEE.

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2017

Conference Paper

A. Varghese, R.Chandran Lekshmi, and A. Rajendran, “Power flow control of solar PV based islanded low voltage DC microgrid with battery management system”, in 1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016, 2017.[Abstract]


The use of low voltage DC microgrids is a promising concept that makes improvements in power quality and reliability to end users through different control techniques. A coordinated control strategy is addressed within DC microgrid for proper power management between sources and loads and regulation of DC bus voltage. For this; different modes of operation are performed based on state of charge of battery and DC bus voltage. Droop control is an effective solution for power sharing between solar PV; battery and loads. A separate control strategy has been developed for battery charging and discharging. MATLAB/SIMULINK simulation results are presented to demonstrate the effectiveness of the proposed power control strategy with battery management system during various operating conditions. © 2016 IEEE.

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2017

Conference Paper

N. Balakrishnan, T. S. Angel, and R.Chandran Lekshmi, “PV-battery system for smart green building using transformer coupled DC-DC converter”, in 1st IEEE International Conference on Power Electronics, Intelligent Control and Energy Systems, ICPEICES 2016, 2017.[Abstract]


Power from Solar is absolutely perfect for use with irrigation systems for gardens; allotments; greenhouses and also for supporting the main grid. Since the power generation of PV system is highly depends upon the environmental conditions such as availability of sunlight; atmospheric temperature; wind speed etc. Combining a storage device with PV is one of the viable solutions to deal with the intermittency of renewable energy sources. Conventional methods of combining these components involve multistage converters and single-stage converters. The no of stages and switches increases the overall efficiency of the system decreases. In the conventional system an individual converter is used for maximum power point tracking and also a battery charge controller. These two individual converters are not used in every time. Transformer coupled dual input DC-DC converter is discussed in the system which integrates both the MPPT and battery charging discharging control. A coordinated control is used for making the system to work in four different modes of operation and there by satisfying the efficient MPPT and battery current tracking. The system is simulated and studied under various conditions in MATLAB/Simulink platform. © 2016 IEEE.

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2015

Conference Paper

J. Freeman, Keerthi, K. Sb, and R.Chandran Lekshmi, “Closed loop control system for a heliostat field”, in Proceedings of IEEE International Conference on Technological Advancements in Power and Energy, TAP Energy 2015, 2015, pp. 272-277.[Abstract]


The alarming energy crisis, heightened by the continuing depletion of fossil fuels, accentuates the need for the development of renewable energy technology, knowledge, and infrastructure. A Central Receiver (Power Tower) Solar Energy system uses heliostats (motorized planar reflectors) to continuously reflect direct radiation from the sun onto a central receiver. This paper discusses a novel closed loop control system for a heliostat field. In this system, rough adjustment of the heliostat is performed using an Inertial Measurement Unit (IMU). Precision adjustment of the heliostat is performed by inducing a small mechanical vibration in the heliostat's reflective surface, using a piezoelectric actuator. This vibration creates time-dependent changes in the light waves reflected from the heliostat, which can be detected by photo-sensors surrounding the thermal receiver target. The position of misaligned heliostats can be corrected once they are identified by FFT analysis of the light waves received by the photo-sensors. This technique can, in principle, control thousands of heliostats simultaneously. The control system is coded using MATLAB. © 2015 IEEE.

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2014

Conference Paper

R. Remya, R.Chandran Lekshmi, and L, N. J., “Design and Simulation of a Single-Stage Half-Bridge AC-DC Converter for Power Factor Correction”, in International Conference On Computation Of Power, Energy, Information and Communication (ICCPEIC), 2014.

2013

Conference Paper

Dr. Balamurugan S. and R.Chandran Lekshmi, “Dynamic Voltage Restorer for Voltage Quality Improvement in Distribution System”, in National Conference on Technological Advancements in Power and Energy (TAP Energy), Amrita School of Engineering, Amritapuri, 2013.

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