VINAY KUMAR NAGUBOINA

@vignaniit.edu.in

ASSISTANTPROFESSOR/ELECTRICAL AND ELECTRONICS ENGINEERING
Vignan's Institute of Information Technology

VINAY KUMAR NAGUBOINA


            Download Compact PDF  
https://researchid.co/vinay

EDUCATION

M.TECH.

RESEARCH INTERESTS

POWER QUALITY
6

Scopus Publications

Scopus Publications

  • Analysis of Quadratic Boost Converter with PV and BESS Using SMC
    Vinay Kumar Naguboina, Satish Kumar Gudey
    Lecture Notes in Electrical Engineering, 2022
  • Enhanced Exponential Reaching Law-Based Sliding Mode Control Of Shunt Active Power Filter In An Electrical Distribution System
    Satish Kumar Gudey, Vinay Kumar Naguboina
    Journal of Engineering Research, 2021
    In this paper a three phase Shunt Active Power Filter (ShAPF) is proposed to address the current related issues in a three phase Electrical Distribution System (EDS). A sliding mode controller (SMC) and an Enhanced Exponential Reaching Law based SMC (EERL-SMC) is proposed for a ShAPF to compensate the load current. The controller’s performance is tested by injecting the current harmonics into the system. A non-linear load along with different loads on the distribution side is connected in parallel in a distribution network at Point of common coupling (PCC). Modelling of the system is done using state space analysis. Stability of the system is analyzed using the state feedback approach. The reference source currents are generated using instantaneous PQ theory. For variations in the load, the THD in the source current is realized. It is found that EERL-SMC is more effective for a ShAPF in reducing the high frequency oscillations and settling time for convergence. The source voltage and current waveforms are observed to be sinusoidal in nature. Both the controllers are effective in reducing the THD levels in the source current as per the IEEE standards. A comparison between the controllers is presented in terms of settling time, THD in source current. PSCAD v4.6 is used for simulation works.
  • Design and analysis of a three phase transformerless hybrid series active power filter based on sliding mode control using PQ-theory and stationary reference frames
    Vinay Naguboina, Satish Gudey
    Serbian Journal of Electrical Engineering, 2019
    In this work, a Three phase Transformerless Hybrid Series Active Power Filter (THSeAF) based on Sliding Mode Control (SMC) is proposed to mitigate the voltage and current distortions present in an electrical distribution systems (EDS). A Sliding Mode Controller is designed by controlling the parameters present on the load side as well as source side of the system. Three separate voltage source converters (VSC) are used. The mod1elling of the system is derived by considering a single-phase system by using state space analysis. The frequency response characteristics have been derived for the single-phase system and the stability of the system is studied. It is observed that the system has good stability margins when the SMC is applied at the source side compared to load side. Simulation results obtained in PSCAD/EMTDC v4.6 have been observed for power quality issues like voltage sags, voltage swells, voltage distortions, voltage unbalances and their concurrent occurrence. The approach of stationary reference frame was used for source side control and PQ theory is used for load side control. It is observed that the proposed controller works well in obtaining a stable and constant load voltage during these power quality issues. The difference in settling time observed is around 4 ms for the load side and source side control. The THD present in the load voltage is near about 1%. The SMC is found to be robust in obtaining a constant load voltage with low THD and an improved power factor.
  • A compensation strategy using THSeAF in a distribution system based on SMC for source side and load side control
    Vinay kumar Naguboina, Satish Kumar Gudey
    2018 International Conference on Computing Power and Communication Technologies Gucon 2018, 2019
    In this paper a compensation strategy in a distribution system using single phase Transformerless Hybrid series Active power Filter (THSeAF) based on voltage source converters (VSC) is proposed. Sliding Mode Controller is implemented on the load side and source side of the system. The modeling of the system is derived using state space analysis. The frequency response characteristics have been derived and the stability of the system is studied. It is founded that the designed system has good stability margins when the SMC is applied at the source side compared to load side. Simulation results obtained in PSCAD/EMTDC v 4.6 have been observed for power quality issues like voltage sags, voltage swells, voltage distortions and their concurrent occurrence. It is observed that the designed controller for THSeAF works well in obtaining a stable and constant load voltage during these power quality issues. The THD present in the load voltage is near about 1%. A short circuit protection circuit for THSeAF is implemented through a circuit breaker in the simulation. It is observed through simulation that the THSeAF is isolated during the fault and hence protected. The SMC is found to be robust in obtaining a constant load voltage with low THD and an improved power factor.
  • Enhanced Exponential Reaching Law SMC for Analyzing PQ Issues in a Distribution System Using Transformer-less Hybrid Series Active Power Filter
    Vinay kumar Naguboina, Satish Kumar Gudey
    Indicon 2018 15th IEEE India Council International Conference, 2018
    In this work, an enhanced Exponential Reaching Law SMC (EERL-SMC) is proposed for a Three phase Transformerless Hybrid series Active power Filter (THSeAF) based on voltage source converters (VSC) to mitigate the power quality issues like voltage distortions and current harmonics. Generally the power quality issues had become quite common in the Electrical Distribution Systems (EDS) due to the usage of power electronic converters. To mitigate these power quality issues, a THSeAF is used in this work. An EERL-SMC is proposed to generate firing pulses to the IGBT switches of the inverter in a THSeAF for voltage and current distortions occurring on the supply side. The voltage and current references are generated using stationary reference frame theory. For obtaining the stability of the system, a mathematical model is derived. Simulations have been performed on PSCAD v4.6 with the EERL-SMC applied on the source side of the system. It is observed through simulations that the THSeAF compensates for sag, swell and voltage harmonics with less total harmonic distortion (THD). A power factor improvement is also observed during the simulation work. The controller performance is found to be robust with less settling time, less steady state error, no chattering during the mitigation of the power quality issues. Desired compensation and THD within the limits are obtained which encourages for effective usage of this topology with EERL-SMC in distribution systems. It can be an alternative to a higher order SMC like super twisting algorithm etc.
  • Solar Power Based Single-Phase Transformerless Hybrid Series Active Filter based on Sliding Mode Controller for voltage and frequency deviations
    Vinay Kumar Naguboina, Satish Kumar Gudey
    India International Conference on Power Electronics Iicpe, 2018
    In this work, a solar power based single phase Transformerless Hybrid Series Active power Filter (THSeAF) based on sliding mode controller (SMC) is proposed to mitigate voltage and frequency deviations in an Electrical Distribution System (EDS). To mitigate the voltage and frequency power quality issues, a THSeAF is used in this work. A solar power rating of 5.kW serves as an input to the THSeAF. An Auxiliary DC source is also provided to assist the solar power. A Boost converter is operated at a duty ratio of 0.4 to obtain desired output voltage of 400 V to be fed to the inverter circuit. A non- linear controller sliding mode control (SMC) is proposed to generate the firing pulses to the IGBT switches of the inverter in THSeAF. Stability of the system is derived using Bode plots by means of state feedback approach. The system is tested for voltage sag, swell, interruptions and frequency deviations. Simulations have been performed on PSCAD v4.6 with the controller operation on the load side of the system. It is observed through simulations that the THSeAF compensates for sag, swell and voltage harmonics with less THD (total harmonic distortion). A power factor improvement is also observed during the simulation work. The controller performance is found to be robust during the mitigation of the power quality issues. Desired compensation and THD within the limits are obtained which encourages for effective usage of this topology with SMC in distribution systems. This work can be extended using higher order SMC to reduce the chattering phenomenon.