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.




Publication Type: Conference Paper
Year of Publication Publication Type Title
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 Nandagopal, J. L., “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 S. Balamurugan 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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