Dr Savarapu Chandra Shekar

@anurag.ac.in

Associate professor, Electrical and Electronics Engineering Department
Anurag Engineering College



              

https://researchid.co/savarapu

EDUCATION

Master of Technology in Power Systems (High Voltage Engineering)
Ph.D in Power systems (Micro Grids)

RESEARCH, TEACHING, or OTHER INTERESTS

Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, Energy

7

Scopus Publications

48

Scholar Citations

3

Scholar h-index

1

Scholar i10-index

Scopus Publications


  • Wavelet-ANN Based Detection of Fault Location of 2-Bus Connected Power Transmission System
    S. Chandra Shekar, S. Jagadeesh, K. Shivashanker, and K. Vinaya Sagar
    IEEE
    The complexity of the power system increases as hundreds of lines due to the penetration of conventional and non-conventional energy sources. Transmitting the power for hundreds of kilometres through large number of transmission lines makes complexity in the network to locate the fault. Thus it is necessary to develop suitable algorithms to identify the location of the fault accurately in presence of large number of transmission lines. In this paper a novel Wavelet-ANN (Artificial Neural Network) based method is developed where the Detailed coefficients (D1 coefficients) obtained from post current signals are used for wavelet analysis. The D1 coefficients obtained from wavelet analysis are used for training and testing ANN at various distances. This analysis is worked out almost within half cycle. The fault location is carried out for various distances, fault impedance's on 2-bus connected transmission system. A 2-bus transmission system is simulated using simulation software and the analysis of fault is done by wavelet analysis. The proposed wavelet based algorithm is tested for all fault conditions at the faulted area and hence it is proved that the proposed method provided the best results for different fault impedance's, fault generator capacities, fault inception angles (FIA).

  • Wavelet-ANN Based Detection of Fault Location of Renewable Energy Sources Integrated Power Transmission System
    S. Chandra Shekar and Surender Reddy Salkuti
    Springer International Publishing

  • Wavelet-ann based fault location identification in micro grid inter connected transmission system
    S. Chandra Shekar*, , G. Ravi Kumar, S.V.N.L. Lalitha, , and
    Blue Eyes Intelligence Engineering and Sciences Engineering and Sciences Publication - BEIESP
    This paper presents a novel protection scheme for the protection of transmission system with microgrid (MG) having of wind energy, solar PV energy and fuel cell sources. MGs provide environmental, economical benefits for the end consumers, power usages and society. However, transmission line and MGs poses major technical challenges. Protection system must respond both MG and utility grid failures. Technical challenges of MG protection are to respond to main and MG faults. A MG model is designed and it is connected to a transmission line. Later, for detection and classification of faults wavelet Analysis (WT) is used. Faults are detected by the fault indices and compared with defined threshold value. The location of fault is done by artificial neural networks (ANN) on MG connected transmission system using detailed (D1) coefficients of energy current signals. This proposed algorithm is tested and more effective for the detection, classification and location of faults on MG interconnected transmission system. This algorithm is accurate and independent of fault inception angle (FIA), fault impedance and fault distance on line.

  • Renewable energy integrated multi-terminal transmission system using wavelet based protection scheme
    Savarapu Chandra Sekhar, G. Ravi Kumar, and S.V.N.L Lalitha
    Institute of Advanced Engineering and Science
    The power plants behavior is crucial under faulted conditions and responses on protection systems. Major microgrid (MG) protection problem is the problem between the fault current in utilitygrid mode and microgrid mode. As conventional protection system doesn’t offer solution for all MG protection challenge, but it needs advanced protection strategy. Protection system must response to both the utilitygrid and MG faults. Fast response of protection is necessary as early as possible if the fault is occurs on utilitygrid and if the fault is occurs on MG, the protection scheme must seperate the small possible portion of MG to remove the fault. This work presents a typical MG protection scheme using digital relaying and satellite communication with wavelet detailed D<sub>1</sub>-coefficients of mother wavelet Bior 1.5. This research work is done for the detection, discrimination and locality of faults at distributed generators (DG’s) integration in multi-terminal transmission system. The algorithm tested under various faults with fault inception angles (FIA), fault impedances and fault distance of feeder line.

  • A transient current based micro-grid connected power system protection scheme using wavelet approach
    S. Chandra Shekar, G.Ravi Kumar, and S.V.N.L Lalitha
    Institute of Advanced Engineering and Science
    Micro-grids comprise Distributed Energy Resources (DER’s) with low voltage distribution networks having controllable loads those can operate with different voltage levels are connected to the micro-grid and operated in grid mode or islanding mode in a coordinated way of control. DER’s provides clear environment-economical benefits for society and consumer utilities. But their development poses great technical challenges mainly protection of main and micro grid. Protection scheme must have to respond to both the main grid and micro-grid faults. If the fault is occurs on main grid, the response must isolate the DER’s from the main grid rapidly to protect the system loads. If the fault ocuurs within the micro-grid, the protection scheme must coordinate and isolates the least priority possible part of the grid to eliminate the fault. In order to deal with the bidirectional energy flow due to large numbers of micro sources new protection schemes are required. The system is simulated using MATLAB Wavelet Tool box and Wavelet based Multi-resolution Analysis is considered. Wavelet based Multi-resolution Analysis is used for detection, discrimination and location of faults on transmission network.  This paper is discussed a transient current based micro-grid connected power system protection scheme using Wavelet Approach described on wavelet detailed-coefficients of Mother Biorthogonal 1.5 wavelet. The proposed algorithm is tested in micro-grid connected power systems environment and proved for the detection, discrimination and location of faults which is almost independent of fault impedance, fault inception angle (FIA) and fault distance of feeder line.

  • Wavelet based fault analysis of hybrid energy source micro-grid connected multi terminal transmission system protection scheme


RECENT SCHOLAR PUBLICATIONS

  • Wavelet-ANN based detection of fault location of hybrid renewable energy sources connected power transmission system
    T Muthamizhan, M Aijaz, DC Sekhar
    International Journal of Renewable Energy Research (IJRER) 14 (3), 551-562 2024

  • Wavelet-ANN Based Detection of Fault Location of 2-Bus Connected Power Transmission System
    SC Shekar, S Jagadeesh, K Shivashanker, KV Sagar
    2024 International Conference on Emerging Techniques in Computational 2024

  • Wavelet-ANN Based Detection of Fault Location of Renewable Energy Sources Integrated Power Transmission System
    SC Shekar, SR Salkuti
    Energy and Environmental Aspects of Emerging Technologies for Smart Grid 2024

  • Renewable energy integrated multi-terminal transmission system using wavelet based protection scheme
    SC Sekhar, GR Kumar, S Lalitha
    International Journal of Power Electronics and Drive Systems 10 (2), 995-1002 2019

  • A transient current based micro-grid connected power system protection scheme using wavelet approach.
    SC Shekar, GR Kumar, S Lalitha
    International Journal of Electrical & Computer Engineering (2088-8708) 9 (1) 2019

  • TRANSMISSION LINE PROTECTION SCHEME IN PRESENCE OF MICROGRID USING NEURO-WAVELET ANALYSIS
    DSVNLL S.CHANDRA SHEKAR, Dr.G.RAVI KUMAR
    International Journal of Pure and Applied Mathematics 120 (6), 551-565 2018

  • Wavelet based transient fault detection and analysis of microgrid connected power system
    SC Shekar, GR Kumar, S Lalitha
    Int. J. Power Syst 1, 46-52 2016

  • Wavelet Based Multi-Terminal Transmission Line Protection with MicroGrid
    SC SHEKAR, GR KUMAR, S LALITHA
    WSEAS Trans. Power Syst. 11, 133-138 2016

  • Simulation of Series, Parallel Configured 7 level Switched Capacitor Inverter with Inductive Load
    SCS Dosapati.Firoj Kumar
    International Journal of Advanced and Innovative Research 3 (8), 233-237 2014

  • Improvement of Power Quality Using Transformerless Cascaded STATCOM under Balanced / Un-Balanced Supply Conditions with Non- Linear Loads
    SCS Mohammad.yaseen
    International Journal of Advanced and Innovative Research 3 (8), 205-210 2014

  • Intensification of a Distribution System using Sinusoidal Pulse Width Modulation by D-STATCOM for Voltage Sag and Swell
    SCS M.Tejaswini
    International Journal of Advance Engineering and Research Development 1 (8 2014

  • Modeling and Control of MPPT Based Grid Connected Wind-PV Hybrid Generation System
    SC Shekar, KR Ram
     2014

  • ELEVEN–LEVEL CASCADED H-BRIDGE INVERTER FED INDUCTION MOTOR USING PHASE SHIFT PWM TECHNIQUE
    VNV Kanamarlapudi, CS Savarapu
     2013

  • Wavelet Analysis of Faulty Terminal and Faulty Phase Identification of 4-Bus Transmission System
    SC SHEKAR

  • Impact of Distributed Generation on Reliability Evaluation of Distribution System
    S Paleti, R Thumu, SC Shekar

  • Optimization and Reliability Evaluation of a Hybrid Power System
    S Paleti, R Thumu, SC Shekar

  • Power Quality Improvement Features for a distributed generation system using 3 LEG-3 Wire Grid Interface Inverter
    K Shivashanker, JS Rao, SC Shekar

  • Power Quality Improvement In Weak Grids With Three Phase Three Leg Active Power Conditioner
    PP Kumar, SC Shekar

MOST CITED SCHOLAR PUBLICATIONS

  • A transient current based micro-grid connected power system protection scheme using wavelet approach.
    SC Shekar, GR Kumar, S Lalitha
    International Journal of Electrical & Computer Engineering (2088-8708) 9 (1) 2019
    Citations: 31

  • Wavelet based transient fault detection and analysis of microgrid connected power system
    SC Shekar, GR Kumar, S Lalitha
    Int. J. Power Syst 1, 46-52 2016
    Citations: 7

  • Renewable energy integrated multi-terminal transmission system using wavelet based protection scheme
    SC Sekhar, GR Kumar, S Lalitha
    International Journal of Power Electronics and Drive Systems 10 (2), 995-1002 2019
    Citations: 6

  • Wavelet-ANN based detection of fault location of hybrid renewable energy sources connected power transmission system
    T Muthamizhan, M Aijaz, DC Sekhar
    International Journal of Renewable Energy Research (IJRER) 14 (3), 551-562 2024
    Citations: 3

  • Wavelet Based Multi-Terminal Transmission Line Protection with MicroGrid
    SC SHEKAR, GR KUMAR, S LALITHA
    WSEAS Trans. Power Syst. 11, 133-138 2016
    Citations: 1