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13th IEEE Power and Energy Society: Innovative Smart Grid Technologies - Asia, ISGT Asia 2024

作者： Sahu, Vivek Kundu, Pratim Indian Institute of Technology School of Computing and Electrical Engineering India

ISBN: (纸本)9798350373929

Uniqueness in behavior of renewable energy sources (RESs) based power generation with regard to fault signature when compared with usual synchronous generator (SG) based systems have put forward challenges in terms of protection. To differentiate single line-to-ground (LG) faults from double line-to-ground faults (LLG) robust identification of fault type is important. In this paper, an index designed on spherical coordinate system (SCS) is formulated. Cross-symmetrical power as a new identity is formulated. The proposed method is pivoted on symmetrical components and calculation of phasor for the fundamental component by using Fourier transformation. It is tested for its resilience against fault distance, fault resistance, fault inception angle (FIA) and series compensation. © 2024 IEEE.

关键词： Discrete Fourier transforms

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CRIS-b: A High-Speed Unified Modulo Reduction Algorithm and Hardware Architecture for CRYSTALS-Kyber 38

CRIS-b: A High-Speed Unified Modulo Reduction Algorithm and ...

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38th International Conference on VLSI Design, VLSID 2025

作者： Majumdar, Alip Shrestha, Rahul School of Computing and Electrical Engineering Indian Institute of Technology Mandi India

ISBN: (纸本)9798331522445

This paper presents highly reliable algorithm and high-speed hardware architecture for a unified modulo reduction for CRYSTALS-Kyber. This new architecture for modulo reduction is capable of operating at a maximum clock frequency of 351.62 MHz on Artix-7 FPGA platform, consuming a latency of 5 clock cycles, which is approximately 35.24% faster than state-of-the-art implementations. In this work, we have alleviated the size expansion problem of intermediate value of the conventional Barrett algorithm (which is one of the fastest and most reliable algorithm for modulo reduction, reported in literature) by suggesting a new technique, referred as 'Conditional R-index Switching for b-value Minimization (CRIS-b)'. We propose a unified modulo reduction design handling both positive and negative spectrum numbers for all arithmetic modulo operations in a butterfly unit of Number Theoretic Transform(NTT). © 2025 IEEE.

关键词： Quantum cryptography

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Evolutionary Search of Optimal Hyperparameters for Learning Various Robot Manipulation Tasks 13

Evolutionary Search of Optimal Hyperparameters for Learning ...

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13th IEEE Congress on Evolutionary Computation, CEC 2024

作者： Sharma, Archit Gupta, Sandeep Thakur, Peeyush Dhar, Narendra Behera, Laxmidhar School of Computing and Electrical Engineering Indian Institute of Technology Mandi India

ISBN: (纸本)9798350308365

This paper presents a comprehensive study of robotic manipulation tasks, focusing on the movement planning and task-handling capabilities of robots. We introduce a novel approach that employs Dynamic Movement Primitives (DMP) for movement planning, coupled with an evolutionary algorithm, specifically the Genetic Algorithm (GA), for hyperparameter tuning of the DMP. Our method significantly enhances the system's precision and control, thereby facilitating a more accurate output. Furthermore, we conduct a comparative analysis of two optimization techniques - user-based and GA-based. Our findings indicate that the GA-based technique offers superior precision, underscoring its potential in advancing robotic manipulation tasks. © 2024 IEEE.

关键词： Genetic algorithms

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Enhancing Security in SWIPT Wireless Networks with Intelligent Reflecting Surfaces 18

Enhancing Security in SWIPT Wireless Networks with Intellige...

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18th IEEE International Conference on Advanced Networks and Telecommunications Systems, ANTS 2024

作者： Thakur, Shilpa Thakor, Satyajit Indian Institute of Technology School of Computing and Electrical Engineering Mandi India

ISBN: (纸本)9798350391725

This study explores physical layer security in intelligent reflecting surface (IRS)-assisted networks that support simultaneous wireless information and power transfer (SWIPT). Initially, we derive a closed-form expression for the secrecy outage probability (SOP) under the assumption that the eavesdropper's statistical channel state information (CSI) is unknown. Building on this, we formulate an optimization problem aimed at minimizing the SOP. The problem is tackled by alternately optimizing the beamforming vectors and phase shift matrices. Simulation results demonstrate that the proposed alternating optimization algorithm effectively reduces the SOP. © 2024 IEEE.

关键词： Inductive power transmission

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Low-Complexity lassification Technique and Hardware-Efficient Classify-Unit Architecture for CNN Accelerator 37

Low-Complexity lassification Technique and Hardware-Efficien...

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37th International Conference on VLSI Design, VLSID 2024

作者： Islam, Md. Najrul Shrestha, Rahul Chowdhury, Shubhajit Roy Indian Institute of Technology Mandi School of Computing and Electrical Engineering India

ISBN: (纸本)9798350384406

This paper proposes simplified classification technique to reduce the complexity of softmax-based classification in the convolutional neural network (CNN) inference engine/accelerator. It primarily allows the CNN accelerator to directly classify the object from the activation of fully connected (FC) layer that avoids complex exponential and divisive operations. Corresponding to the suggested technique, this work also presents a hardware-efficient VLSI architecture of classify unit for CNN accelerator. Furthermore, the proposed classify-unit architecture has been ASIC synthesized and post-layout simulated in 28 nm-FDSOI technology node. As a result, our design delivers a peak throughput of 2.5 GIPS with a hardware efficiency of 5.05× 103 GIPS/mW/mm2. Comparison of these results with the relevant reported works indicates that the proposed classify unit manifests 24.1 × lesser area and 12.5× better hardware efficiency than the state-of-the-art implementations. Finally, complete CNN accelerator that is integrated with the proposed classify unit has been functionally validated with the aid of Zynq UltraScale+ ZCU102 FPGA-board in real-world scenario, using the MobileNet-V2 CNN model. © 2024 IEEE.

关键词： Integrated circuit design

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Integration of Wireless and Plug-in Charging Systems Using Three Leg Converter Configuration with Wide Output Voltage Range 4

Integration of Wireless and Plug-in Charging Systems Using T...

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4th IEEE International Conference on Sustainable Energy and Future Electric Transportation, SEFET 2024

作者： Rai, Ashutosh Tummuru, Narsa Reddy Vakcharla, Venkat Ratnam School of Computing and Electrical Engineering Indian Institute of Technology Mandi India

ISBN: (纸本)9798350383997

With the increasing adoption of EVs it is crucial to have a versatile charging system that can support charging of both the wireless EVs and plug-in two wheelers or three wheelers. To meet such a requirement at residential level a three-leg converter configuration is proposed to accommodate charging for both wireless EVs and plug-in vehicles that require DC charging. Such an integration renders economy in device count and eliminates requirement of dedicated charger assembly for each kind of electric vehicle. Both wireless and plug-in EVs can be charged simultaneously with wide range of output voltages in both channels. The wireless charger assembly is based on full bridge for AC level 1 charging for cars while the plug-in charger is based on half bridge LLC topology to contain 2-wheeler and 3-wheeler DC charging requisites. Variable frequency control (VFC) is implemented to achieve the required voltage gains. Using voltage gain analysis and input impedance characteristics, VFC helps to achieve wide voltage output with ZVS realization. The proposed charger topology is simulated using MATLAB Simulink simulation platform to validate the functionality for desired range of output voltage and soft switching provisions. © 2024 IEEE.

关键词： Wireless charging

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Predicting NIRF Ranking via Novel K-Star Ensembles 15

Predicting NIRF Ranking via Novel K-Star Ensembles

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15th International Conference on computing Communication and Networking Technologies, ICCCNT 2024

作者： Kumar, Praveen Gupta, Manika Priyanka, Priyanka Dubey, Anuj Kumar Dutt, Varun Indian Institute of Technology School of Computing and Electrical Engineering Mandi India Indian Institute of Technology Mandi India

ISBN: (纸本)9798350370249

The National Institutional Ranking Framework (NIRF) was established by the indian Ministry of Education (MoE), which ranks higher education institutions across the country. The institutions being ranked may benefit if their rankings or performance could be predicted given their parameters, thereby, improving their institute's attributes. However, less attention has been given to the problem of predicting rank from the parameters collected for the rankings. The main objective of this research is to forecast the ranking of the Institutions using a four-year dataset of NIRF collected for 16 indian institute of Technologies (IITs). The change in parameter data was collected across 16 parameters to predict the change in ranks using two consecutive years. A novel K-Star 2 -stage ensemble algorithm was developed. In the first stage, a number of lazy learning algorithms, K-Star, Instance-Based Learner (IBk) and Locally Weighted Learning (LWL), were trained using 10 -fold crossvalidation. The predictions of these algorithms from stage 1 were taken into stage 2, where the K-Star predicted the change in rank. The results revealed that the K-Star Ensemble had an RMSE of 0.009 compared to other algorithms including IBk (RMSE: 5.76), K-Star (RMSE: 5.85), and LWL (RMSE: 5.91). We highlight the main implications of our work for rank prediction in the real world. © 2024 IEEE.

关键词： IBk K-Star Lazy Learning LWL Machine Learning Ranking

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Synchronisation of solar PV-wind-battery-based water pumping system using brushless DC motor drive

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International Journal of Power Electronics 2023年第4期18卷 435-459页

作者： Gautam, Sunil Kumar Kumar, Rajan School of Computing and Electrical Engineering Indian Institute of Technology Mandi Mandi175005 India Department of Electrical Engineering National Institute of Technology Kurukshetra Kurukshetra136119 India

An environment-friendly, efficient and simple control method for solar photovoltaic (PV) and wind-based water pumping system using brushless DC (BLDC) motor drive and battery storage is proposed in this paper. This technology provides continuous water pumping under different climate conditions. By using perturb and observe (P&O) maximum power point tracking (MPPT), the solar PV and permanent magnet synchronous generator (PMSG)-based wind energy conversion system (WECS) generate maximum power, and feed it to a common DC bus. The power is delivered to a BLDC motor that operates the water pump. The motor speed and the battery charging are controlled, and the DC bus is always maintained at fixed voltage. Power generated by solar PV and WECS is delivered to charge the battery using a single-ended primary-inductor converter (SEPIC)-based charge controller if water pumping is not demanded. In MATLAB, the proposed model is developed and simulated, and demonstrated under various operating conditions. © 2023 Inderscience Publishers. All rights reserved.

关键词： Brushless DC motors

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Inductive Wireless Charging for Onboard Interleaved Buck Boost Integrated Hybrid Storage System of Electric Vehicle 4

Inductive Wireless Charging for Onboard Interleaved Buck Boo...

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4th IEEE International Conference on Sustainable Energy and Future Electric Transportation, SEFET 2024

作者： Singhal, Abhishek Tummuru, Narsa Reddy Vakacharla, Venkata Ratnam School of Computing and Electrical Engineering Indian Institute of Technology Himachal Mandi India

ISBN: (纸本)9798350383997

This work proposes a system configuration for onboard interleaved buck boost (IBB) converter which integrate wireless inductive power transfer (IPT) system as well as hybrid energy storage system (HESS). This IBB converter works as boost converter to drive the load at its output as well as it works as a controlled rectifier for IPT link on secondary side to charge the battery. HESS system has battery, super capacitor (SC) combination which improves the battery lifetime and reduce the current stress on the battery during the transients. IBB converter works as a boost converter when it supplies power to load from HESS and it works a buck converter when it charges HESS from IPT link. Dual loop voltage control scheme is used to manage the power available at output dc link. Based on the power availability IBB converter fulfils the load power demand by charging or discharging of HESS while maintaining constant output voltage. To validate the proposed system configuration a scaled down hardware prototype of 500W is prepared in the laboratory. © 2024 IEEE.

关键词： Hybrid power

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Bandgap Engineered Double-Cation/Double-Halide Quasi-Cubic Perovskite for Highly Efficient (>36%) Indoor Photovoltaics

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IEEE Journal of Photovoltaics 2023年第6期13卷 858-865页

作者： Singh, Ranbir Kundar, Milon Pal, Suman Kalyan Sharma, Satinder K. Indian Institute of Technology Mandi School of Computing and Electrical Engineering Mandi175005 India Indian Institute of Technology Mandi School of Mechanical and Materials Engineering Mandi175005 India Indian Institute of Technology Mandi School of Physical Sciences Mandi175005 India

Double-cation- and double-halide-based perovskites are well known for their better structural stability and improved efficiency in photovoltaics compared to single-cation-based perovskites. Herein, we have investigated the effects of the addition of formamidinium bromide (FABr) in methylammonium lead iodide (MAPbI3) perovskite for the formation of a double-cation/double-halide (DCDH) perovskite structure, namely, MA1-xFAxPbI3-xBrx, which is specifically engineered for efficient indoor light harvesting. The indoor photovoltaics (IPVs) fabricated from the DCDH perovskite layer exhibited a distinctively higher short-circuit current density (JSC) of 172.64 μA·cm-2, an open-circuit voltage (VOC) of 0.91 V, and a power conversion efficiency (PCE) of 36.29% compared to the JSC of 159.03 μA·cm-2, VOC of 0.84 V, and PCE of 27.89% observed for the MAPbI3 IPVs under the simulated indoor LED light at 1000 lux. The use of formamidinium (FA+) cation and bromide (Br-) anion in the DCDH perovskite helps in stabilizing the perovskite crystalline phase from tetragonal to quasi-cubic, increases the bandgap, and complements the optical absorption in the visible region. Moreover, FA+ and Br- suppress the trap states and nonradiative recombination loss in the DCDH perovskite structure. The results from this study will help researchers understand the mechanism of DCDH-perovskite-based IPVs, which is well explained by studying the charge carrier recombination dynamics and its correlation with the crystal structure of the perovskites under indoor lighting conditions. In addition, the optimized FABr-incorporated device exhibits a PCE of 20.59% under standard 1-sun conditions, which is better than the reference MAPbI3 device (17.16%). © 2011-2012 IEEE.

关键词： Perovskite

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