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Papers by Snehaprava Swain

Research paper thumbnail of Short circuit fault analysis in a grid connected DFIG based wind energy system with active crowbar protection circuit for ridethrough capability and power quality improvement

International Journal of Electrical Power & Energy Systems, 2017

In power industry, improvement of the short circuit Fault-ride through (FRT) capability of grid i... more In power industry, improvement of the short circuit Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Generators (DFIGs) for the wind power system is an important issue. In this paper an Active Crowbar Protection (ACB_P) system is proposed to enhance the Fault-ride through (FRT) capability of DFIG so as to improve the power quality of the system. The protection scheme proposed here is designed with a capacitor in series with the resistor unlike the conventional Crowbar (CB) having only resistors. The importance of ACB_P is to maintain the connection of DFIG with the grid during fault conditions to provide uninterruptable power supply to the loads. The major functions of the capacitor in the protection circuit are to eliminate the ripples generated in the rotor current and to protect the converters as well as the DC-link capacitor. The main objectives of the proposed approach are: minimisation of magnitude of rotor fault currents, maintenance of constant DC-link voltage, reduction in crowbar operation time to avoid disconnection between the DFIG and the Rotor side converter (RSC), improvement in the short circuit response of terminal voltage and enhancement in the dynamic responses of the DFIG. These objectives are achieved through the incorporation of ACB_P scheme between the rotor of the DFIG and RSC. The proposed scheme is validated on different types of fault conditions and it is observed that there is significant improvement in the objectives. Simulation results are carried out on a 1.7 MVA DFIG based WECS under different types of short circuit faults in MATLAB/Simulation and functionality of the proposed scheme is verified.

Research paper thumbnail of Ride-through capability improvement of a grid-integrated DFIG based wind turbine system using a new protection design

2016 IEEE 6th International Conference on Power Systems (ICPS), 2016

Improvement of Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Genera... more Improvement of Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Generators (DFIGs) in wind energy system is an major issue of the power industry. In this paper a Novel Active Crowbar Protection (NACB_P) system is proposed and designed to enhance the Fault-ride through (FRT) capability of DFIG so as to improve the system stability. The importance of NACB_P is to maintain the connection of DFIG with the grid during fault condition to provide uninterruptable power supply to the loads. The major function of the capacitor used in the protection circuit is to eliminate the ripples generated in the rotor current and to protect the converter as well as the DC-link capacitor. The main objectives of the proposed approach are: minimisation of magnitude of rotor fault currents, maintaining constant DC-link voltage and the reactive power profile of the system. The proposed scheme is validated through a 1.7 MVA DFIG based WECS with different fault conditions in MATLAB/Simulation. An Experimental analysis is presented in this paper taking three phase grid fault into consideration.

Research paper thumbnail of New control strategy with CB-P for improved FRT capability of grid-integrated DFIG based wind energy system

2016 3rd International Conference on Electrical Energy Systems (ICEES), 2016

A new control prospective is adopted in this paper to enhance the Fault Ride Through (FRT) capabi... more A new control prospective is adopted in this paper to enhance the Fault Ride Through (FRT) capability of the variable speed Induction Generator along with a Crowbar protection circuit. The Induction Generator is a Doubly Fed Induction Generator (DFIG) used in a Wind Power Conversion System (WPCS). The DFIGs interconnected with the grid are very much sensitive to any disturbance in the grid. The stator of the generator is directly connected to the grid. Hence occurrence of any fault near the grid, immediately leads to a sag in the stator voltage of the generator causing overcurrents as well as overvoltages in the rotor windings. As a result there is a chance of damage of the partial fraction Rotor Side Converter (RSC) during fault. In order to protect the converter, here in this paper a new crowbar protection design is adopted along with the proposed control technique. The proposed strategy is validated through simulation results. The Simulations are carried out in MATLAB on a 1.7 MVA DFIG system and the effectiveness of the new protection design is verified.

Research paper thumbnail of Fault Analysis in a Grid Integrated DFIG Based Wind Energy System with NA CB_P Circuit for Ridethrough Capability and Power Quality Improvement

International Journal of Emerging Electric Power Systems, 2016

In this paper a three phase fault analysis is done on a DFIG based grid integrated wind energy sy... more In this paper a three phase fault analysis is done on a DFIG based grid integrated wind energy system. A Novel Active Crowbar Protection (NACB_P) system is proposed to enhance the Fault-ride through (FRT) capability of DFIG both for symmetrical as well as unsymmetrical grid faults. Hence improves the power quality of the system. The protection scheme proposed here is designed with a capacitor in series with the resistor unlike the conventional Crowbar (CB) having only resistors. The major function of the capacitor in the protection circuit is to eliminate the ripples generated in the rotor current and to protect the converter as well as the DC-link capacitor. It also compensates reactive power required by the DFIG during fault. Due to these advantages the proposed scheme enhances the FRT capability of the DFIG and also improves the power quality of the whole system. Experimentally the fault analysis is done on a 3hp slip ring induction generator and simulation results are carried ou...

Research paper thumbnail of Development of Strategies for Fault Ride Through Capability Improvement of a Grid Connected DFIG based Wind Energy Conversion System

Now-a-days, the growing demand of electricity and the scarcity of fossil fuels, encourage to gene... more Now-a-days, the growing demand of electricity and the scarcity of fossil fuels, encourage to generate electricity from never ending renewable energy resources such as wind, solar etc., Wind energy has become one of the most important and promising sources of renewable energy. Today the wind power capacity of the world is approximately 539,291 MW at the end of 2017 and around 52,552 MW of capacity was added in the year 2017 only. The rapid increase in wind farms and production of wind energy facilitates the interconnection of Wind Turbine Generation System (WTGS) with the grid for uninterruptable power supply. With increased penetration of wind power into electrical grids, Variable Speed Induction Generators are largely preferred for its dynamic features. Out of these, Doubly Fed Induction Generator (DFIG) is one which has various advantages such as providing four quadrant operation, unit power factor and maintained reactive power. But a grid connected system is always subjected to v...

Research paper thumbnail of A Review on Characteristic of Li-Ion Battery for Electric Vehicle

Lecture Notes in Electrical Engineering, 2021

Research paper thumbnail of Autonomous group particle swarm optimisation tuned dynamic voltage restorers for improved fault-ride-through capability of DFIGs in wind energy conversion system

IET Energy Systems Integration

In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers... more In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers of the dynamic voltage restorer (DVR) in an optimal manner in order to improve the fault-ride-through (FRT) capability of the grid-connected doubly-fed induction generators. An active crowbar protection (ACB_P) coupled with the rotor of the DFIG, provides a very little compensation, on blocking the high rotor current during fault condition. Control of DVR is achieved through use of multiple PI controllers. This paper presents a novel multi-objective tuning known as Autonomous Group Particle Swarm Optimisation (AGPSO) to optimally tune the PI controllers. The optimisation algorithm uses diverse autonomous groups confined within a common target to achieve more directed and randomised search results for any population. Voltage sag compensation, total harmonic distortion (THD), RMS value of signal are the three major indices for comparison study during fault. Finally, the performance improvement in FRT of the DFIG with optimised controller was studied through DFIG responses on comparing with normal controller. Efficacy of the proposed controller proposed is verified by a simulation model of DFIG System with 1.5 MW rating in MATLAB. The results are analysed and comparative data are placed to ensure the enhanced FRT capability of the system.

Research paper thumbnail of Fault ridethrough and power quality improvement of Doubly-Fed Induction Generator based wind turbine system during grid fault with Novel Active Crowbar Protection design

2016 IEEE Region 10 Conference (TENCON), 2016

Research paper thumbnail of Autonomous group particle swarm optimisation tuned dynamic voltage restorers for improved fault-ride-through capability of DFIGs in wind energy conversion system

IET Energy Systems Integration

In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers... more In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers of the dynamic voltage restorer (DVR) in an optimal manner in order to improve the fault-ride-through (FRT) capability of the grid-connected doubly-fed induction generators. An active crowbar protection (ACB_P) coupled with the rotor of the DFIG, provides a very little compensation, on blocking the high rotor current during fault condition. Control of DVR is achieved through use of multiple PI controllers. This paper presents a novel multi-objective tuning known as Autonomous Group Particle Swarm Optimisation (AGPSO) to optimally tune the PI controllers. The optimisation algorithm uses diverse autonomous groups confined within a common target to achieve more directed and randomised search results for any population. Voltage sag compensation, total harmonic distortion (THD), RMS value of signal are the three major indices for comparison study during fault. Finally, the performance improvement in FRT of the DFIG with optimised controller was studied through DFIG responses on comparing with normal controller. Efficacy of the proposed controller proposed is verified by a simulation model of DFIG System with 1.5 MW rating in MATLAB. The results are analysed and comparative data are placed to ensure the enhanced FRT capability of the system.

Research paper thumbnail of Short circuit fault analysis in a grid connected DFIG based wind energy system with active crowbar protection circuit for ridethrough capability and power quality improvement

International Journal of Electrical Power & Energy Systems, 2017

In power industry, improvement of the short circuit Fault-ride through (FRT) capability of grid i... more In power industry, improvement of the short circuit Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Generators (DFIGs) for the wind power system is an important issue. In this paper an Active Crowbar Protection (ACB_P) system is proposed to enhance the Fault-ride through (FRT) capability of DFIG so as to improve the power quality of the system. The protection scheme proposed here is designed with a capacitor in series with the resistor unlike the conventional Crowbar (CB) having only resistors. The importance of ACB_P is to maintain the connection of DFIG with the grid during fault conditions to provide uninterruptable power supply to the loads. The major functions of the capacitor in the protection circuit are to eliminate the ripples generated in the rotor current and to protect the converters as well as the DC-link capacitor. The main objectives of the proposed approach are: minimisation of magnitude of rotor fault currents, maintenance of constant DC-link voltage, reduction in crowbar operation time to avoid disconnection between the DFIG and the Rotor side converter (RSC), improvement in the short circuit response of terminal voltage and enhancement in the dynamic responses of the DFIG. These objectives are achieved through the incorporation of ACB_P scheme between the rotor of the DFIG and RSC. The proposed scheme is validated on different types of fault conditions and it is observed that there is significant improvement in the objectives. Simulation results are carried out on a 1.7 MVA DFIG based WECS under different types of short circuit faults in MATLAB/Simulation and functionality of the proposed scheme is verified.

Research paper thumbnail of Ride-through capability improvement of a grid-integrated DFIG based wind turbine system using a new protection design

2016 IEEE 6th International Conference on Power Systems (ICPS), 2016

Improvement of Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Genera... more Improvement of Fault-ride through (FRT) capability of grid integrated Doubly Fed Induction Generators (DFIGs) in wind energy system is an major issue of the power industry. In this paper a Novel Active Crowbar Protection (NACB_P) system is proposed and designed to enhance the Fault-ride through (FRT) capability of DFIG so as to improve the system stability. The importance of NACB_P is to maintain the connection of DFIG with the grid during fault condition to provide uninterruptable power supply to the loads. The major function of the capacitor used in the protection circuit is to eliminate the ripples generated in the rotor current and to protect the converter as well as the DC-link capacitor. The main objectives of the proposed approach are: minimisation of magnitude of rotor fault currents, maintaining constant DC-link voltage and the reactive power profile of the system. The proposed scheme is validated through a 1.7 MVA DFIG based WECS with different fault conditions in MATLAB/Simulation. An Experimental analysis is presented in this paper taking three phase grid fault into consideration.

Research paper thumbnail of New control strategy with CB-P for improved FRT capability of grid-integrated DFIG based wind energy system

2016 3rd International Conference on Electrical Energy Systems (ICEES), 2016

A new control prospective is adopted in this paper to enhance the Fault Ride Through (FRT) capabi... more A new control prospective is adopted in this paper to enhance the Fault Ride Through (FRT) capability of the variable speed Induction Generator along with a Crowbar protection circuit. The Induction Generator is a Doubly Fed Induction Generator (DFIG) used in a Wind Power Conversion System (WPCS). The DFIGs interconnected with the grid are very much sensitive to any disturbance in the grid. The stator of the generator is directly connected to the grid. Hence occurrence of any fault near the grid, immediately leads to a sag in the stator voltage of the generator causing overcurrents as well as overvoltages in the rotor windings. As a result there is a chance of damage of the partial fraction Rotor Side Converter (RSC) during fault. In order to protect the converter, here in this paper a new crowbar protection design is adopted along with the proposed control technique. The proposed strategy is validated through simulation results. The Simulations are carried out in MATLAB on a 1.7 MVA DFIG system and the effectiveness of the new protection design is verified.

Research paper thumbnail of Fault Analysis in a Grid Integrated DFIG Based Wind Energy System with NA CB_P Circuit for Ridethrough Capability and Power Quality Improvement

International Journal of Emerging Electric Power Systems, 2016

In this paper a three phase fault analysis is done on a DFIG based grid integrated wind energy sy... more In this paper a three phase fault analysis is done on a DFIG based grid integrated wind energy system. A Novel Active Crowbar Protection (NACB_P) system is proposed to enhance the Fault-ride through (FRT) capability of DFIG both for symmetrical as well as unsymmetrical grid faults. Hence improves the power quality of the system. The protection scheme proposed here is designed with a capacitor in series with the resistor unlike the conventional Crowbar (CB) having only resistors. The major function of the capacitor in the protection circuit is to eliminate the ripples generated in the rotor current and to protect the converter as well as the DC-link capacitor. It also compensates reactive power required by the DFIG during fault. Due to these advantages the proposed scheme enhances the FRT capability of the DFIG and also improves the power quality of the whole system. Experimentally the fault analysis is done on a 3hp slip ring induction generator and simulation results are carried ou...

Research paper thumbnail of Development of Strategies for Fault Ride Through Capability Improvement of a Grid Connected DFIG based Wind Energy Conversion System

Now-a-days, the growing demand of electricity and the scarcity of fossil fuels, encourage to gene... more Now-a-days, the growing demand of electricity and the scarcity of fossil fuels, encourage to generate electricity from never ending renewable energy resources such as wind, solar etc., Wind energy has become one of the most important and promising sources of renewable energy. Today the wind power capacity of the world is approximately 539,291 MW at the end of 2017 and around 52,552 MW of capacity was added in the year 2017 only. The rapid increase in wind farms and production of wind energy facilitates the interconnection of Wind Turbine Generation System (WTGS) with the grid for uninterruptable power supply. With increased penetration of wind power into electrical grids, Variable Speed Induction Generators are largely preferred for its dynamic features. Out of these, Doubly Fed Induction Generator (DFIG) is one which has various advantages such as providing four quadrant operation, unit power factor and maintained reactive power. But a grid connected system is always subjected to v...

Research paper thumbnail of A Review on Characteristic of Li-Ion Battery for Electric Vehicle

Lecture Notes in Electrical Engineering, 2021

Research paper thumbnail of Autonomous group particle swarm optimisation tuned dynamic voltage restorers for improved fault-ride-through capability of DFIGs in wind energy conversion system

IET Energy Systems Integration

In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers... more In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers of the dynamic voltage restorer (DVR) in an optimal manner in order to improve the fault-ride-through (FRT) capability of the grid-connected doubly-fed induction generators. An active crowbar protection (ACB_P) coupled with the rotor of the DFIG, provides a very little compensation, on blocking the high rotor current during fault condition. Control of DVR is achieved through use of multiple PI controllers. This paper presents a novel multi-objective tuning known as Autonomous Group Particle Swarm Optimisation (AGPSO) to optimally tune the PI controllers. The optimisation algorithm uses diverse autonomous groups confined within a common target to achieve more directed and randomised search results for any population. Voltage sag compensation, total harmonic distortion (THD), RMS value of signal are the three major indices for comparison study during fault. Finally, the performance improvement in FRT of the DFIG with optimised controller was studied through DFIG responses on comparing with normal controller. Efficacy of the proposed controller proposed is verified by a simulation model of DFIG System with 1.5 MW rating in MATLAB. The results are analysed and comparative data are placed to ensure the enhanced FRT capability of the system.

Research paper thumbnail of Fault ridethrough and power quality improvement of Doubly-Fed Induction Generator based wind turbine system during grid fault with Novel Active Crowbar Protection design

2016 IEEE Region 10 Conference (TENCON), 2016

Research paper thumbnail of Autonomous group particle swarm optimisation tuned dynamic voltage restorers for improved fault-ride-through capability of DFIGs in wind energy conversion system

IET Energy Systems Integration

In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers... more In this paper, a multi-objective tuning algorithm is proposed for the voltage/current controllers of the dynamic voltage restorer (DVR) in an optimal manner in order to improve the fault-ride-through (FRT) capability of the grid-connected doubly-fed induction generators. An active crowbar protection (ACB_P) coupled with the rotor of the DFIG, provides a very little compensation, on blocking the high rotor current during fault condition. Control of DVR is achieved through use of multiple PI controllers. This paper presents a novel multi-objective tuning known as Autonomous Group Particle Swarm Optimisation (AGPSO) to optimally tune the PI controllers. The optimisation algorithm uses diverse autonomous groups confined within a common target to achieve more directed and randomised search results for any population. Voltage sag compensation, total harmonic distortion (THD), RMS value of signal are the three major indices for comparison study during fault. Finally, the performance improvement in FRT of the DFIG with optimised controller was studied through DFIG responses on comparing with normal controller. Efficacy of the proposed controller proposed is verified by a simulation model of DFIG System with 1.5 MW rating in MATLAB. The results are analysed and comparative data are placed to ensure the enhanced FRT capability of the system.