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Papers by Ramalingam Balasubramanian

Research paper thumbnail of Analysis of Current Source PWM Inverter for Different Levels with No-Insulating Switching Device

This paper gives the new setup of inverter having DC current source (CSI) having no insulated swi... more This paper gives the new setup of inverter having DC current source (CSI) having no insulated switching device. In the proposed new CSI topology every switching device are connected across a common-source level, thus a single power supply gate drive circuit is required and no insulated power supply and the customary bootstrap circuit is applied. This CSI topology is even legitimate for utmost level of current waveform output, where the power switches number increases. As a turn up, gate drive complexity is reduced, and it also eliminates the cost of capacitors and transformers in switching devices, driver circuits. In addition, this new topology of current-source PWM inverter (CSI) can operate even at utmost switching frequency, as every switches will be connected across a common source level. In this paper the different level of proposed CSI operation principle, its design using computer simulation (MATLAB) with its total harmonic distortion (THD) is analyzed. The computer simulation using MATLAB determines the feasibility of this topology with the analysis of different level which results in reduction of its complexity and the physical size.

Research paper thumbnail of Analysis of current source inverter:A critic based on various PWM control strategies

Research paper thumbnail of Analysis and Simulation of Isolated Wind Diesel Hybrid Power System

The present day energy scenario clearly shows the large potential demand for the electrification ... more The present day energy scenario clearly shows the large potential demand for the electrification of remote rural places which can be met easily through the stand alone renewable energy systems. The hybridization of these stand alone renewable energy systems increases the reliability of self sufficient power supply for off grid locations [1]. This work describes the characteristic features of a standalone hybrid Wind-Diesel microgrid. The modelling and simulation of a standalone Wind/Diesel system with individual system components i.e., Diesel Set and Wind Set are simulated and described in detail. The effect of penetrative variations with change in wind speed and the impact of position and length of transmission line on reactive power compensation in the microgrid are effectively demonstrated by simulation results.

Research paper thumbnail of Fuzzy Controller Based Switched Boost Converter with Reduced Harmonics for Micro Grid Application

Journal of Applied Sciences, 2014

Research paper thumbnail of Fuzzy Based Single Phase Double-tuned Current Source Inverter with Reduced Harmonics for Microgrid

Journal of Applied Sciences, 2014

Research paper thumbnail of Design and Implementation of PS-ZVS Full Bridge Converter

Journal of Applied Sciences, 2014

Research paper thumbnail of Fuzzy Logic Controller Based Power Conversion System Fed from Fuel Cell

Journal of Applied Sciences, 2014

Research paper thumbnail of SVPWM Based Stator Oriented Non-linear Control of Induction Motor Drives

Information Technology Journal, 2014

Research paper thumbnail of Analysis of multi level current source inverter: A critic based on various PWM control strategies

Research paper thumbnail of Synchronous Rotating Reference Frame Based Control Technique for Three-phase Hybrid Active Power Filter: A Simulink Approach

Journal of Applied Sciences, 2014

Research paper thumbnail of Maximum Power Point Tracking of Photovoltaic Generation Based on Forecasting Model

Journal of Software, 2013

This paper addresses the research methodology for Maximum Power Point Tracking (MPPT). Photovolta... more This paper addresses the research methodology for Maximum Power Point Tracking (MPPT). Photovoltaic (PV) Generators may receive different level of solar irradiance and temperature, such as partially shaded by clouds, tree leaves or nearby building. Under partial shaded conditions, several peak power points can occur when the PV module is shaded, which would significantly reduce the energy produced by PV Generators without proper control. Therefore, a Maximum Power Point Tracking (MPPT) Algorithm is used to extract the maximum available PV power from the PV array. However, the common used conventional MPPT algorithms are unable to detect global peak (GP) power point with the presence of several local peaks (LP). In this paper, a hybrid Particle Swarm Optimization and Artificial Neural Network (PSO-ANN) algorithm is proposed to detect the global peak power. MATLAB/Simulink is used to simulate a PV system which consists of PV Generators, DC-DC boost converter, a hybrid PSO-ANN Algorithm, and a resistive load. The simulation results are compared and discussed. The proposed algorithm should perform well to detect the Global Peak of the PV array even under partial shaded conditions.

Research paper thumbnail of Chua's diode and strange attractor: a three‐layer hardware–software co‐design for medical image confidentiality

IET Image Processing, 2020

Medical image security relies upon the arrival of improved techniques for enhancing the confusion... more Medical image security relies upon the arrival of improved techniques for enhancing the confusion as well as diffusion processes in the pixel level manipulations. Non-linear circuits constructed with hardware components can be employed for hardware–software co-design in medical image encryption. The proposed approach has adopted Chua diode circuit for the generation of 256 × 256 random synthetic image with the entropy of 7.9972. This synthetic image has been utilised to scramble the DICOM image for the second level of diffusion as the cellular automata provides the first level of scrambling and diffusion. The average correlation coefficients of encrypted pixels are 0.00204, −0.00298 and −0.00054 in three directions. The encrypted pixels pass the NIST SP 800-22 test suite and offer resistance to statistical, differential and chosen plain text attacks.

Research paper thumbnail of Analysis of Current Source PWM Inverter for Different Levels with No-Insulating Switching Device

This paper gives the new setup of inverter having DC current source (CSI) having no insulated swi... more This paper gives the new setup of inverter having DC current source (CSI) having no insulated switching device. In the proposed new CSI topology every switching device are connected across a common-source level, thus a single power supply gate drive circuit is required and no insulated power supply and the customary bootstrap circuit is applied. This CSI topology is even legitimate for utmost level of current waveform output, where the power switches number increases. As a turn up, gate drive complexity is reduced, and it also eliminates the cost of capacitors and transformers in switching devices, driver circuits. In addition, this new topology of current-source PWM inverter (CSI) can operate even at utmost switching frequency, as every switches will be connected across a common source level. In this paper the different level of proposed CSI operation principle, its design using computer simulation (MATLAB) with its total harmonic distortion (THD) is analyzed. The computer simulation using MATLAB determines the feasibility of this topology with the analysis of different level which results in reduction of its complexity and the physical size.

Research paper thumbnail of Analysis of current source inverter:A critic based on various PWM control strategies

Research paper thumbnail of Analysis and Simulation of Isolated Wind Diesel Hybrid Power System

The present day energy scenario clearly shows the large potential demand for the electrification ... more The present day energy scenario clearly shows the large potential demand for the electrification of remote rural places which can be met easily through the stand alone renewable energy systems. The hybridization of these stand alone renewable energy systems increases the reliability of self sufficient power supply for off grid locations [1]. This work describes the characteristic features of a standalone hybrid Wind-Diesel microgrid. The modelling and simulation of a standalone Wind/Diesel system with individual system components i.e., Diesel Set and Wind Set are simulated and described in detail. The effect of penetrative variations with change in wind speed and the impact of position and length of transmission line on reactive power compensation in the microgrid are effectively demonstrated by simulation results.

Research paper thumbnail of Fuzzy Controller Based Switched Boost Converter with Reduced Harmonics for Micro Grid Application

Journal of Applied Sciences, 2014

Research paper thumbnail of Fuzzy Based Single Phase Double-tuned Current Source Inverter with Reduced Harmonics for Microgrid

Journal of Applied Sciences, 2014

Research paper thumbnail of Design and Implementation of PS-ZVS Full Bridge Converter

Journal of Applied Sciences, 2014

Research paper thumbnail of Fuzzy Logic Controller Based Power Conversion System Fed from Fuel Cell

Journal of Applied Sciences, 2014

Research paper thumbnail of SVPWM Based Stator Oriented Non-linear Control of Induction Motor Drives

Information Technology Journal, 2014

Research paper thumbnail of Analysis of multi level current source inverter: A critic based on various PWM control strategies

Research paper thumbnail of Synchronous Rotating Reference Frame Based Control Technique for Three-phase Hybrid Active Power Filter: A Simulink Approach

Journal of Applied Sciences, 2014

Research paper thumbnail of Maximum Power Point Tracking of Photovoltaic Generation Based on Forecasting Model

Journal of Software, 2013

This paper addresses the research methodology for Maximum Power Point Tracking (MPPT). Photovolta... more This paper addresses the research methodology for Maximum Power Point Tracking (MPPT). Photovoltaic (PV) Generators may receive different level of solar irradiance and temperature, such as partially shaded by clouds, tree leaves or nearby building. Under partial shaded conditions, several peak power points can occur when the PV module is shaded, which would significantly reduce the energy produced by PV Generators without proper control. Therefore, a Maximum Power Point Tracking (MPPT) Algorithm is used to extract the maximum available PV power from the PV array. However, the common used conventional MPPT algorithms are unable to detect global peak (GP) power point with the presence of several local peaks (LP). In this paper, a hybrid Particle Swarm Optimization and Artificial Neural Network (PSO-ANN) algorithm is proposed to detect the global peak power. MATLAB/Simulink is used to simulate a PV system which consists of PV Generators, DC-DC boost converter, a hybrid PSO-ANN Algorithm, and a resistive load. The simulation results are compared and discussed. The proposed algorithm should perform well to detect the Global Peak of the PV array even under partial shaded conditions.

Research paper thumbnail of Chua's diode and strange attractor: a three‐layer hardware–software co‐design for medical image confidentiality

IET Image Processing, 2020

Medical image security relies upon the arrival of improved techniques for enhancing the confusion... more Medical image security relies upon the arrival of improved techniques for enhancing the confusion as well as diffusion processes in the pixel level manipulations. Non-linear circuits constructed with hardware components can be employed for hardware–software co-design in medical image encryption. The proposed approach has adopted Chua diode circuit for the generation of 256 × 256 random synthetic image with the entropy of 7.9972. This synthetic image has been utilised to scramble the DICOM image for the second level of diffusion as the cellular automata provides the first level of scrambling and diffusion. The average correlation coefficients of encrypted pixels are 0.00204, −0.00298 and −0.00054 in three directions. The encrypted pixels pass the NIST SP 800-22 test suite and offer resistance to statistical, differential and chosen plain text attacks.