Sanjeevikumar Padmanaban

Bio: Sanjeevikumar Padmanaban is an academic researcher from Aarhus University. The author has contributed to research in topics: Photovoltaic system & Boost converter. The author has an hindex of 34, co-authored 367 publications receiving 5244 citations. Previous affiliations of Sanjeevikumar Padmanaban include Sathyabama University & National Institute of Technology, Puducherry.

Design and Implementation of a PV-Fed Grid-Integrated Wireless Electric Vehicle Battery Charger Present in a Residential Environment

Abstract: The power transfer technique used to charge electric vehicles (EVs) has gone through a large development lately. Developing a purely autonomous vehicle has motivated researchers to implement the wireless power transfer technique to charge the EV battery. Previously developed EV used a pure grid-dependent charging system, increasing the net energy consumption from the grid. The vehicle weight also reduces the vehicle's reliability with the increase in the size of the battery. This limitation is eliminated by the proposed technique that uses a wireless EV battery charging system with a utility grid. This article presents an improved system for supplying photovoltaic (PV) power to an EV used in a grid-interfaced residential system. This power electronic converter-based interfacing system facilitates a bidirectional power flow technique for feeding extra PV panel power to the grid and charging the EV using utility grid power during the unavailability of solar power. A bidirectional cycloconverter is employed, which delivers a variable frequency concerning modes of operation of the system. The experimental prototype employs an opal-RT real-time simulator for integrating the proposed system into the grid. This article presents the comparison of the simulation and experimentation results of the wireless EV charging system.

Technical Constraints of Integrating Net Energy Metering from the Malaysian Perspective

Abstract: This paper evaluates the technical issues due to net metering from the Malaysian distribution network perspective. Simulations of Malaysian distribution network with net metering implementation for residential consumers were carried out in DigSILENT PowerFactory. The simulation results demonstrate that net metering at high capacity can cause power quality issues to the distribution network such as voltage rise, fault level increment, and contribution to harmonic distortions. The case studies signify the severity of power quality issues with increasing penetration of the solar photovoltaic. Mitigation measures for the technical issues and proposed sizing were also discussed to ensure the solar PV does not violate any permissible boundaries of the grid.

New Inverting Modified CUK Converter Configurations with Switched Inductor (MCCSI) for High-Voltage/Low-Current Renewable Applications

Abstract: Inverting Modified CUK Converter with Switched Inductor (MCCSI) configurations are articulated in the paper for high-voltage and low-current renewable energy applications. Based on the Switched Inductor (SI) position in MCC converter, four new modified CUK converter configurations are proposed as MCCSI-XLL, MCCSI-LYL, MCCSI-LLZ and MCCSI-XYZ. The mathematical analysis and comparison is shown in terms of the voltage conversion ratio, number of active and reactive components. The mode of operation of MCCSI-XLL configuration is discussed to understand the working concept of MCCSI configurations. The striking features of the proposed configurations are discussed in details. Operation of the proposed converter is verified by simulation in MatLab R2016a.

Proposed novel multiphase-multilevel inverter configuration for open-end winding loads

Abstract: This paper presents a new multiphase-multilevel inverter configuration for open-winding loads and suitable for medium power (low-voltage/high-current) applications such as ‘More Electric Aircraft’. Modular structure comprised of standard dual three-phase voltage source inverter (VSI) along with one additional bi-directional semi-conductor device (MOSFET/IGBT) per phase and two capacitors with neutral point. The additional switches and capacitors are introduced to generate the additional voltage levels in outputs of the VSI. An original modified single carrier five-level modulation (MSCFM) algorithm is developed in this work and overcomes the complexity of standard space vector modulations, easy for real implementation purposes in digital processors. Proposed six-phase multilevel inverter configuration generates multilevel outputs with benefit in comprises with standard multilevel inverter topologies. Further, the complete numerical model of the proposed AC converter along with pulse-width modulation (PWM) is developed with Matlab/PLECS simulation software's. A set of observed results is presented in balanced working condition and always shown good agreement with the theoretical developments.

Modified SEPIC boost converter with constant switching frequency modulation using sliding mode controller

Abstract: This paper presents a sliding mode control (SMC) approach to a novel high output gain SEPIC converter. Power circuit of the conventional SEPIC converter is modified with an inclusion of single inductor and capacitor which improves the efficiency and output gain. Conventional PI type controllers are very common solutions for DC-DC converters. However, it is a difficult task to optimize a single PI controller gain in different loads and disturbances. Proposed SMC based equivalent controller implemented on the modified SEPIC converter overcomes these aforementioned drawbacks. A dynamic hysteresis constant switching frequency method is attempted to operate in the appropriate switching frequency interval. The proposed circuit and controller structure are validated in Matlab/Simulink under different perturbations.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Exoelectrogenic bacteria that power microbial fuel cells

Abstract: The use of microbial fuel cells to generate electrical current is increasingly being seen as a viable source of renewable energy production In this Progress article, Bruce Logan highlights recent advances in our understanding of the mechanisms used by exoelectrogenic bacteria to generate electrical current and the important factors to consider in microbial fuel cell design There has been an increase in recent years in the number of reports of microorganisms that can generate electrical current in microbial fuel cells Although many new strains have been identified, few strains individually produce power densities as high as strains from mixed communities Enriched anodic biofilms have generated power densities as high as 69 W per m2 (projected anode area), and therefore are approaching theoretical limits To understand bacterial versatility in mechanisms used for current generation, this Progress article explores the underlying reasons for exocellular electron transfer, including cellular respiration and possible cell–cell communication