Angel T. S. currently serves as Assistant Professor at the Department of Electrical and Electronics Engineering at Amrita School of Engineering, Amritapuri. Angel T. S. has completed  B. Tech. in EEE  from M. A College of Engineering, Kothamangalam in the year 2009 and  M. Tech. in Power Systems from College of Engineering, Trivandrum in the year 2012.





Publication Type: Conference Paper
Year of Publication Publication Type Title
2015 Conference Paper T. S. Angel, “Optimally Placed PMU's for Fault Detection in Distribution Networks”, in International conference paper, 2015.
2015 Conference Paper S. Aneesh and T. S. Angel, “Quadrilateral relay based distance protection scheme for transmission lines under varying system conditions”, in Proceedings of IEEE International Conference on Technological Advancements in Power and Energy, TAP Energy 2015, 2015, pp. 35-39.[Abstract]

Quadrilateral relay provides flexible protection during high fault resistance of ground and phase faults. This is advantageous for protection of phase-to-earth faults on short lines, non-effectively earthed systems and feeders with extremely high tower footing resistance. It also provides fault impedance coverage for both phase to phase and phase to ground faults. The proposed work intends the development of a numerical quadrilateral distance relay that can retain its function even under a major change in system configuration. The proposed relaying scheme is analyzed by coding the relay logic and simulating the system with transmission network in MATLAB/Simulink. Different factors influencing the performance of quadrilateral relay are studied and verified. It is observed that the scheme is adaptive to the system variations and mal trips are reduced. © 2015 IEEE.

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2015 Conference Paper Aa Rajeev, T. S. Angel, and Khan, F. Zb, “Fault location in distribution feeders with optimally placed PMU's”, in Proceedings of IEEE International Conference on Technological Advancements in Power and Energy, TAP Energy 2015, 2015, pp. 438-442.[Abstract]

Instrumenting power networks with phasor measurement units (PMUs) facilitates several tasks including optimum power flow, system control, contingency analysis, fault detection etc. For the above purposes, PMU's are not required to place in all the bus in a power system. Also because of higher cost, optimal placement of PMU's are done by using the binary search algorithm. The algorithm for optimal placement is tested for a 7 bus and standard IEEE 14 & 30 bus systems. Once the PMU's are placed optimally, the next step involved is the fault location and diagnosis scheme which is capable of accurately identifying the location of a fault upon its occurrence. The proposed fault location method can be used to identify the fault in both ring and radial type distribution feeders. This scheme consists of three independent steps which are running parallel to obtain the exact location of the fault. The proposed algorithm is tested for eight different faults in an 11 bus radial test system and a 14 bus ring system. © 2015 IEEE.

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2014 Conference Paper T. S. Angel, “Interfacing of Permanent Magnet Synchronous Wind energy System to grid using a solid state transformer”, 2014.
2013 Conference Paper A. Sudhakaran and T. S. Angel, “Permanent magnet synchronous wind generator for microgrid dynamic performance improvement”, in 2013 Annual International Conference on Emerging Research Areas, AICERA 2013 and 2013 International Conference on Microelectronics, Communications and Renewable Energy, ICMiCR 2013 - Proceedings, Kerala, 2013.[Abstract]

Microgrids (MGs) and Distributed Generation are becoming a significant area of research because of their peculiar distinctiveness. Microgrids are composed of generating sources which can be renewable, placed near the customer side. Also, they have the intrinsic property of islanding i.e. the disconnection of either the MG from the main grid or a part of the MG from the rest of the MG. In this paper, the behavior of a MG during grid connected and islanded operation is investigated. A control approach is proposed in this paper to be applied on a PMSG, for providing both voltage and frequency regulation capabilities, and thereby to provide an improvement in the dynamic behavior of a microgrid system. Also a pitch angle control strategy and a switch mode control strategy with MPPT have been implemented. The MATLAB/SIMULINK software is used to develop the simulation model. © 2013 IEEE.

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2013 Conference Paper N. G. Nayana and T. S. Angel, “Soft switching Techniques for high voltage gain in Asymmetrical full bridge converter”, in Proceedings of National Conference on Technological Advancements in Power and Energy, 2013.[Abstract]

This paper explore the techniques of Asymmetrical full bridge converter with high voltage gain. It achieved zero voltage switching of all power switches, zero current switching of output diodes. Prototype of the converter is developed, experimented and validated using the asymmetrical pulse width modulation techniques. The proposed converter achieved a gain of 12 with zero switching losses, no conduction losses and a fixed switching frequency.

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2012 Conference Paper T. S. Angel, “Back up wide area protection technique for power transmission grid using PMU”, in National Conference Paper, 2012.
Publication Type: Journal Article
Year of Publication Publication Type Title
2014 Journal Article T. S. Angel and S., S., “Soft Computing Technique for online monitoring of voltage stability margin of a wind penetrated power system”, World Academy of Science Engineering and Technology, February 21st 2014, vol. 1, 2014.
Publication Type: Conference Proceedings
Year of Publication Publication Type Title
2013 Conference Proceedings S. Aryamol and T. S. Angel, “Power Quality Enhancement of a Grid Connected Wind PMSG Using a STATCOM- Control Scheme”, National Conference on Technological Advancements in Power & Energy. pp. 65-69, 2013.[Abstract]

Supplementing wind power into an electric grid affects the power quality. The influence of the wind turbine in the grid system concerning the power quality measurements are the active power, reactive power, voltage variation, harmonics, flicker and electrical behaviour of switching operation and these are measured according to national/international guidelines. This paper demonstrates the power quality issues due to installation of wind turbine with permanent magnet synchronous generator (PMSG) to the grid. A STATCOM is connected at the point of common coupling with a battery energy storage system (BESS) to alleviate the power quality issues. The STATCOM control scheme for the grid connected wind energy generation system for power quality improvement is simulated using MATLAB/Simulink. The simulation results show that the STATCOM provides reactive power support to the load and the power factor at the source side is maintained at unity.

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