Conference Papers
Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506
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Item Study of 2D localization using SIMO antenna(Institute of Electrical and Electronics Engineers Inc., 2016) Laddha, P.; Prasad, R.; Shripathi Acharya, U.S.; Srihari, P.; Prasad, S.; Rao, P.H.A single input and multiple output (SIMO) antenna configuration is presented for real time data acquisition. The proposed approach can provide both range and angle information in a plane. A method of localization of multiple point objects (targets) in azimuthal plane is realized by employing one stationary transmitting antenna and dynamic receiving antennas positions. FMCW chirp signals are used as transmitting signals. A parametric analysis is carried out by varying the bandwidth of transmitted signal, number of samples and number of antennas on a linear array with equal inter-element spacing. Radial resolution of 0.4 feet and 0.23 feet is achieved for 2GHz and 6 GHz bandwidths respectively. The method is extended to identify multiple targets. © 2016 IEEE.Item Energy aware routing protocol for resource constrained wireless sensor networks(Association for Computing Machinery acmhelp@acm.org, 2016) Prasad, S.; Jaiswal, S.; Shet, N.S.V.; Sarwesh, P.Wireless sensor network (WSN) is a developing technology that improves the resource utilization in various fields such as home automation, e-health, smart grid, precision agriculture etc. It consists of sensor devices, which works autonomously with its sensing, communication and computation capabilities. In most of the sensor network applications the nodes will be deployed in remote areas (land slide monitoring, wildlife monitoring etc.), so replacing the battery often is impossible in many WSN scenarios. Hence energy is considered as a valuable resource in resource constrained wireless sensor networks. In this paper, we propose a new routing methodology to improve the energy efficiency in resource constrained WSN. The proposed technique uses SNR (Signal to Noise Ratio), node degree and residual energy as routing parameters, to find an energy efficient and reliable path for data transmission. The combination of the parameters used in the proposed routing technique is done based on weighted sum approach. The proposed framework has been implemented on and compared with a number of standard energy efficient protocols and our results show considerable improvement in comparison to the existing techniques. © 2016 ACM.Item 3-D radar imaging using extended 2-D range migration technique(Institute of Electrical and Electronics Engineers Inc., 2017) Nagarad, S.R.; Sourabh, A.S.; Shripathi Acharya, U.S.; Srihari, P.; Prasad, S.; Rao, P.H.A three dimensional (3-D) imaging system is implemented by employing 2-D range migration algorithm (RMA) for frequency modulated continuous wave synthetic aperture radar (FMCW-SAR). The backscattered data of a 1-D synthetic aperture at specific altitudes are coherently integrated to form 2-D images. These 2-D images at different altitudes are stitched vertically to form a 3-D image. Numerical simulation for near-field scenario are also presented to validate the proposed algorithm. © 2017 IEEE.Item Evaluation of solar PV panel performance under humid atmosphere(Elsevier Ltd, 2020) Tripathi, A.K.; Ray, S.; Mangalpady, A.; Prasad, S.The main aim of this paper is to study the effects of humidity on the PV panel. In this paper, the panel performance was studied in the laboratory under varied humid atmosphere. The PV performance parameters were computed by measuring its output voltage and current, amount of solar radiation incident on the panel's surface and its surface temperature by varying humidity levels artificially in the laboratory. From the studies it was observed that with rising humidity levels, solar insolation and panel power output decrease. With an increment of 50.15% in the humidity level, the panel power output reduces by 34.22%. Moreover, it was found that due to the increase in humidity from 65.40% to 98.20% the panel temperature got lowered by 11.40%. © 2020 Elsevier Ltd. All rights reserved.Item A Novel Boost Derived Input-Parallel Output-Series DC-DC Converter for Bipolar DC Microgrid(Institute of Electrical and Electronics Engineers Inc., 2023) Prasad, S.; Mandal, S.; Prabhakaran, P.; Arun Dominic, D.This paper illustrates a novel converter called Input Parallel Output Series Boost Cuk (IPOSBC) converter, designed specifically for low-voltage bipolar DC microgrid (BPDCMG) applications. The converter features a single-input dual-output configuration and utilizes an interleaved structure to minimize current ripple when connected to renewable energy sources like solar PV or storage unit like battery in the BPDCMG. The paper presents a dynamic model of the proposed converter and develops a closed-loop controller for current and voltage control operation. By connecting dispatchable sources such as batteries to the input terminals, the IPOSBC converter can also function in voltage control mode to regulate the bus voltage of BPDCMG system. Furthermore, the paper discusses an intriguing method to mitigate voltage imbalance in the BPDCMG without an active source, utilizing the IPOSBC converter as a DC compensator, like an active shunt filter or D-STATCOM in AC systems. Here, the converter operates without supplying or consuming power, except for converter losses. Simulation results depicting various operating modes are presented to validate the effectiveness of the IPOSBC converter. © 2023 IEEE.Item A Novel Active Switched-Inductor Based Hybrid Boost-Cuk Converter with High Voltage Gain(Institute of Electrical and Electronics Engineers Inc., 2023) Prasad, S.; Mandal, S.; Prabhakaran, P.; Arun Dominic, D.This paper presents a novel transformer less high gain DC-DC converter based on active switched inductor. The proposed converter features high voltage gain with reduced voltage stress across the power switch compared to the state-of-the-art converter topologies with same component count. The continuous input current of the converter facilitates suitable interface of a low voltage solar PV source to DC or AC grid having higher voltage level. Moreover, due to its bidirectional feature, the proposed converter is capable of interfacing battery or ultracapacitor to the traction inverter in an EV drive train. This paper illustrates operating principle and steady-state analysis of the proposed converter. Dynamic modelling and controller design have been discussed to regulate input current and output voltage of the converter. To validate the efficacy of the proposed converter, closed-loop simulation results has been presented. © 2023 IEEE.Item A Novel Input-Parallel Output-Series SEPIC-Cuk Converter for Bipolar Voltage Balancing(Institute of Electrical and Electronics Engineers Inc., 2023) Prasad, S.; Mandal, S.; Prabhakaran, P.; Arun Dominic, D.This article describes a novel Input-Parallel Output-Series SEPIC-Cuk (IPOSSC) converter formulated for application in low voltage bipolar DC microgrid (BDMG) systems. The proposed bi-directional converter adopts a single input dual output configuration with inherited common ground and employs an interleaved-structure to reduce source current fluctuations when linked to sustainable energy sources (SES) such as solar PV or energy storage elements (ESE) like batteries. The article includes the development of a dynamic model for this proposed circuit and formulates closed-loop controller for precise current and voltage regulation. Additionally, by integrating dispatchable sources like a battery into the source terminals, the IPOSSC can operate in voltage regulation mode to effectively control the bus voltage. Furthermore, the article explores an intriguing approach to counteract voltage unbalance in BDMG systems without relying on an active energy source connected to the source terminal. It harnesses the IPOSSC capabilities as a DC compensator, similar to an active shunt filter or D-STATCOM in AC systems, with the converter only incurring losses and not supplying or consuming power. The article substantiates the efficacy of the IPOSSC converter through simulation results depicting its performance in various operating modes. © 2023 IEEE.Item A Novel Switched-Inductor merged SEPIC-Cuk Converter with Enhanced Voltage Gain(Institute of Electrical and Electronics Engineers Inc., 2023) Prasad, S.; Mandal, S.; Prabhakaran, P.; Arun Dominic, D.This paper introduces a novel high voltage gain DC-DC converter that operates without a transformer, relying on switched-inductor. The proposed bi-directional converter achieves a notable increase in voltage gain and exhibits enhanced versatility by supporting both buck and boost execution in both power flow directions. This is achieved while minimizing stress on the components. The converter maintains a continuous input current and offers a bipolar output, making it well-suited for interfacing sustainable energy sources (SES) with a Bipolar DC microgrid (BPDCMG). Moreover, owing to its bidirectional feature, the proposed converter is adept at interfacing energy storage components (ESC) like batteries or ultracapacitors with the NPC inverter in an EV drive train. The paper illustrates the operating principles and steady-state analysis of the proposed converter. It further explores dynamic modelling and controller design to ensure regulation of source current and load voltage. Simulation results are presented to substantiate the efficacy of the introduced converter. © 2023 IEEE.Item A Novel Input-Parallel Output-Series SEPIC-Cuk Converter for Bipolar Voltage Balancing(Institute of Electrical and Electronics Engineers Inc., 2023) Prasad, S.; Mandal, S.; Prabhakaran, P.; Arun Dominic, D.This article describes a novel Input-Parallel Output-Series SEPIC-Cuk (IPOSSC) converter formulated for application in low voltage bipolar DC microgrid (BDMG) systems. The proposed bi-directional converter adopts a single input dual output configuration with inherited common ground and employs an interleaved-structure to reduce source current fluctuations when linked to sustainable energy sources (SES) such as solar PV or energy storage elements (ESE) like batteries. The article includes the development of a dynamic model for this proposed circuit and formulates closed-loop controller for precise current and voltage regulation. Additionally, by integrating dispatchable sources like a battery into the source terminals, the IPOSSC can operate in voltage regulation mode to effectively control the bus voltage. Furthermore, the article explores an intriguing approach to counteract voltage unbalance in BDMG systems without relying on an active energy source connected to the source terminal. It harnesses the IPOSSC capabilities as a DC compensator, similar to an active shunt filter or DSTATCOM in AC systems, with the converter only incurring losses and not supplying or consuming power. The article substantiates the efficacy of the IPOSSC converter through simulation results depicting its performance in various operating modes. © 2023 IEEE.Item A Three-Port Converter for Integrating Solar PV-Battery Systems with DC Loads(Institute of Electrical and Electronics Engineers Inc., 2024) Prasad, S.; Prabhakaran, P.; Arun Dominic, D.This paper presents a new three-port DC-DC converter circuit tailored for integrating solar PV and battery systems with DC loads, enabling single-stage energy conversion. The proposed design outperforms traditional non-isolated multi-input DC-DC converters by offering superior voltage boosting while utilizing fewer inductors. It operates flexibly as a single-input dual-output, dual-input single-output, or single-input single-output system, adapting seamlessly to varying energy flows between sources and loads. Additionally, it ensures maximum power point tracking for the solar PV source and maintains output voltage regulation through a multi-objective control architecture based on competitive mode selector. Steady-state and dynamic simulation results are provided to validate the performance of the converter across multiple operating modes. © 2024 IEEE.