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An Improved High Gain Continuous Input Current Quadratic Boost Converter for Next-Generation Sustainable Energy Application

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IEEE Transactions on Circuits and systems II: Express Briefs 2024年第5期71卷 2839-2843页

作者： Liu, Hwa-Dong Jana, Anindya Sundar Lin, Chang-Hua National Taiwan Normal University Undergraduate Program of Vehicle and Energy Engineering Taipei106 Taiwan University of Notre Dame Department of Electrical Engineering South BendIN46556 United States National Taiwan University of Science and Technology Department of Electrical Engineering Taipei106 Taiwan

With the rapid transformation from fossil fuel-based energy systems to renewable-based energy systems the application of a high gain boost DC-DC converter is becoming the main attraction due to its wide range of numerous applications. This specific study presents an improved high gain non isolated quadratic boost DC-DC converter (QBC) with voltage gain three times of the quadratic boost converter. The proposed non-isolated category topology is the modified version of the quadratic boost converter where the 2nd inductor of the QBC is replaced by a voltage multiplier cell (VMC) and a switch capacitor network is integrated with the VMC to increase the voltage gain as well as to reduce the switch's voltage stress. Moreover, the continuous input current and common ground feature of this proposed circuit configuration have shaped its potential application by making it advantageous over other non-isolated based high gain boost converters. To support its feasibility a rated power of 150 W prototype is developed after validating the results by Plecs software. The voltage gain offered by this proposed circuit configuration is justified by experimental results and the software simulation. A comprehensive analysis and components design is also formulated and documented in this brief. © 2004-2012 IEEE.

关键词： Boost converter

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Moving Average Estimation by Geometric Optimization 63

Moving Average Estimation by Geometric Optimization

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63rd IEEE Conference on Decision and Control, CDC 2024

作者： Nguyen-Le, Alex Matni, Nikolai University of Pennsylvania Department of Electrical and Systems Engineering PA United States

ISBN: (纸本)9798350316339

We propose a new geometric-optimization framework for maximum likelihood estimation of moving-average models. Instead of optimizing directly over the moving average parameters, we formulate the estimation problem over the reflection coefficients and show how to perform gradient descent over a reflection-coefficient manifold. This choice leads to simpler expressions in the objective function and in the constraints, which can yield more convenient expressions for theoretical analysis. Finally, we numerically implement and compare the proposed estimation schemes in the reflection coefficients to those based on moving-average parmeterizations. We show that our novel formulation works in practice and yields equivalent solutions to currently employed formulations. © 2024 IEEE.

关键词： Autoregressive moving average model

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TRANSIENT STABILITY ENHANCEMENT OF GRID-FORMING TYPE-3 WIND TURBINE GENERATORS 23

TRANSIENT STABILITY ENHANCEMENT OF GRID-FORMING TYPE-3 WIND ...

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23rd Wind and Solar Integration Workshop, WIW 2024

作者： Hajtaleb, Salah Bahrani, Behrooz Electrical and Computer Systems Engineering Department Monash University Melbourne Australia

ISBN: (纸本)9781837242689

Grid-forming control is considered to be essential in the transition to renewables-dominated power systems. However, grid-forming Type-3 wind turbine generators present unique challenges due to their electromechanical coupling with the grid and the limited kinetic energy in their drive-trains. This prevents active power control methods that emulate synchronous-machine behaviour from delivering robust and stable performance in Type-3 turbines. These limitations become more evident during recovery from severe grid disturbances. To overcome these limitations, this paper proposes a lead-compensator (LC)-based approach for synchronisation and active-power control as an alternative to virtual-synchronous-generators (VSG). The proposed approach is intended to demonstrate that the system damping and the overall transient stability can be improved solely by altering the control structure. Therefore, several time-domain studies have been conducted under different grid-strength levels and current-limitation mechanisms, and the comparison of post-fault recovery performance of the two controllers are presented. The results show that excessive active power oscillations and rotor speed deviations observed with VSG control are substantially mitigated using the proposed LC approach. More importantly, this is achieved without compromising inertia and droop settings, or utilising frequency measurements. Reduced turbine mechanical stress and enhanced robustness are among the benefits of this approach. © Energynautics GmbH.

关键词： Kinetic energy

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Bandwidth Enhancement for Half Mode Substrate Integrated Waveguide Antenna using Defected Ground Structures

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International Journal of Electronics and Telecommunications 2023年第3期69卷 449-454页

作者： Astuti, Dian Widi Muslim, Rivayanto Simanjuntak, Imelda Firmansyah, Teguh Cahyasiwi, Dwi Astuti Natali, Yus Department of Electrical Engineering Universitas Mercu Buana Jakarta Indonesia Department of Electrical Engineering Universitas Sultan Ageng Tirtayasa Serang Indonesia Department of Electrical Engineering Universitas Muhammadiyah Prof. Dr. HAMKA Jakarta Indonesia Telecommunication Program Universitas Telkom Jakarta Indonesia

The SIW antenna suffers from the narrow bandwidth for a single cavity and single resonant. Defected ground structure (DGS) with a dual cavity was the solution to solve narrow bandwidth by resulting in hybrid resonance. The hybrid resonance with 14.83% impedance bandwidth is proposed in this antenna design. The first resonance resulted from the combination of the TE101 modes from inner and outer HMSIW cavities while the second resonance resulted from the combination of the strong TE101 and the weak TE102 mode from the inner HMSIW cavity and the addition of the weak TE101 from the outer HMSIW cavity. The measurement antenna design has a broadband antenna with a 14.31% (5.71 – 6.59 GHz) impedance bandwidth by using substrate Rogers RO 5880. © The Author(s).

关键词： Defected ground structures

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Techno-economic analysis of green hydrogen integration in smart grids: Pathways to sustainable energy systems

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International Journal of Hydrogen Energy 2024年 143卷 989-999页

作者： Shahzad, Sulman Alsenani, Theyab R. Kilic, Heybet Wheeler, Patrick Department of Electrical Engineering Islamia University of Bahawalpur Bahawalpur63100 Pakistan Department of Electrical Engineering College of Engineering in Al-Kharj Prince Sattam Bin Abdulaziz University Al-Kharj11942 Saudi Arabia Department of Electric Power and Energy Systems Dicle University Diyarbakır21280 Turkey Department of Electrical and Electronic Engineering University of Nottingham NottinghamNG7 2RD United Kingdom

This study conducts a comprehensive techno-economic analysis of green hydrogen integration in smart grids, highlighting its potential to transform energy systems. Green hydrogen, produced via water electrolysis using renewable sources like wind and solar, offers a carbon-neutral alternative to traditional hydrogen production. The paper evaluates electrolysis technologies' efficiency and cost dynamics, including PEM and alkaline systems, and integrates advanced smart grid technologies for real-time monitoring and energy management. Our findings reveal that while green hydrogen reduces carbon emissions and enhances grid flexibility, challenges remain in terms of infrastructure and cost reductions. Policy support through incentives, such as feed-in tariffs for green hydrogen production, and regulatory frameworks, like emission reduction targets, will be crucial to scale the adoption of green hydrogen and make it a viable component of future sustainable energy strategies. © 2024 Hydrogen Energy Publications LLC

关键词： Electrolyzer Energy storage Green hydrogen LCOH Proton exchange membrane

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Unveiling memory-window narrowing mechanism after bipolar cycling in HZO/Si FeFETs: Critical role of hole trap generation and carrier de-trapping behavior

Unveiling memory-window narrowing mechanism after bipolar cy...

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2024 IEEE International Electron Devices Meeting, IEDM 2024

作者： Cho, Seong-Kun Toprasertpong, Kasidit Takenaka, Mitsuru Takagi, Shinichi Department of Electrical Engineering and Information Systems The University of Tokyo Tokyo Japan

ISBN: (纸本)9798350365429

This study investigates the physical mechanism of memory window (MW) narrowing in HZO/Si FeFETs, which is one of the most serious reliability issues, by introducing a new viewpoint focusing on hold voltage (VHold) and a novel measurement method that allows independent evaluation of polarization (P) and threshold voltage (VTH). We find that MW narrowing can be mitigated by adjusting VHold, indicating that MW narrowing is determined by increased densities of trapped electrons and holes, which cannot be de-trapped from generated traps during the hold condition. It is also found in the obtained VTH-P relationship that rapid generation of hole traps with stress cycles plays a key role in MW narrowing, while polarization switching does not change even for devices with no MW. It is shown that material engineering to suppress trap generation is effective for improving FeFET reliability. © 2024 IEEE.

关键词： Threshold voltage

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Python-Based Cross-Platform Impedance Benchmarking Tool (CroZBenMa) for IBR's EMT Models in Matlab/Simulink and PSCAD/EMTDC 10

Python-Based Cross-Platform Impedance Benchmarking Tool (Cro...

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10th IEEE International Power Electronics and Motion Control Conference, IPEMC 2024 ECCE Asia

作者： Zhou, Weihua Mohammed, Nabil Bahrani, Behrooz Monash University Department of Electrical and Computer Systems Engineering Melbourne Australia

ISBN: (纸本)9798350351330

This paper presents a Python-driven graphical user interface (GUI) explicitly crafted for benchmarking the electromagnetic transient (EMT) models of inverter-based resources (IBRs) across Matlab/Simulink and PSCAD/EMTDC platforms through impedance measurement techniques. The GUI ensures a user-friendly experience, enabling seamless interactions between these platforms while offering advanced visualization of impedance measurement results and associated benchmarking errors. This paper delves into the Python-based implementation that powers these features. Through a series of case studies, the tool's efficacy in benchmarking IBR's EMT models is validated. The benchmarking methodology and corresponding GUI design are extensible to other leading EMT platforms such as DIgSILENT/PowerFactory, PSSE, EMTP-RV, EMTP-ATP, and DSAToolsTM/SSAT, fostering expansive and holistic research in the stability analysis of the IBR-based modern power systems. © 2024 IEEE.

关键词： Benchmarking

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Grid-Forming PV System for Frequency Ancillary Services Provision 3

Grid-Forming PV System for Frequency Ancillary Services Prov...

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3rd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2024

作者： Barac, Bojana Capuder, Tomislav Panteli, Mathaios University of Zagreb Faculty of Electrical Engineering and Computing Department of Energy and Power Systems Croatia University of Cyprus Department of Electrical and Computer Engineering Cyprus

ISBN: (纸本)9798350375923

With the increasing penetration of photovoltaic (PV) systems posing challenges to power system stability, this paper investigates the effectiveness of grid-forming controlled PV systems in providing frequency ancillary services. The study implements the Virtual Synchronous Machine strategy, utilizing DC-link capacitor energy for inertial response provision (DCVQVSM), integrated within a grid-forming topology. To ensure power-frequency droop control, an additional control loop is introduced within the DCVQ-VSM topology. The efficacy of this control system is proved through simulations conducted on a simple two-bus system and a fully-electrified active distribution network (ADN). Both case studies demonstrate the successful operation of grid-forming controlled PV systems, highlighting their capability to influence power system frequency dynamics. The analysis underscores the significance of deloading PV operation in facilitating flexibility services provision, thereby enhancing the reliability and resilience of system operation. © 2024 IEEE.

关键词： Synchronous machinery

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Compact Model Build Upon Dynamic Weighting Artificial Neural Network Approach for Complementary Field Effect Transistors

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IEEE Transactions on Electron Devices 2024年第1期71卷 246-253页

作者： Butola, Rajat Li, Yiming Kola, Sekhar Reddy National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program Hsinchu300093 Taiwan Institute of Pioneer Semiconductor Innovation The Institute of Artificial Intelligence Innovation National Yang Ming Chiao Tung University Parallel and Scientific Computing Laboratory Electrical Engineering and Computer Science International Graduate Program The Institute of Communications Engineering the Institute of Biomedical Engineering Department of Electronics and Electrical Engineering Hsinchu300093 Taiwan

In this work, a dynamic weighting-artificial neural network (DW-ANN) methodology is presented for quick and automated compact model (CM) generation. It takes advantage of both TCAD simulations for high accuracy and SPICE simulations for cost-effectiveness. This methodology is developed for gate-all-around (GAA) silicon (Si) nanosheet (NS) complementary field effect transistor (CFET), a potential candidate for future CMOS technology due to its innate properties. The critical process variation (PV) sources that severely degrade the CFET performance are estimated using DW-ANN. It reduces the computation cost and predicts the effects of PV sources with less than 1% error. Furthermore, a compact DW-ANN-based Verilog-A model has been developed that captures the dc as well as transient behavior accurately for circuit-level analysis. CFET-based circuits such as inverter, 6T-static random access memory (SRAM), and ring oscillator (RO) are characterized and implemented using DW-ANN-based CM. The overall average error of the model is reported as less than 2%. Therefore, the proposed device and circuit modeling approach provides a feasible solution for the rapid compact modeling of new emerging devices with good convergence and high accuracy. © 1963-2012 IEEE.

关键词： Neural networks

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Petrochemical Company Utility Steam Upgrade 4

Petrochemical Company Utility Steam Upgrade

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4th International Multidisciplinary Information Technology and engineering Conference, IMITEC 2024

作者： Cassim, Munassar Feukeu, Etienne Alain Mbuyu, Sumbwanyambe Department of Electrical and Smart Systems Engineering / Cset Johannesburg South Africa

ISBN: (纸本)9798350387988

The Petrochemical Company operates four wax processing and blending plants located inside an Oil Refinery in Durban. High-pressure utility steam is necessary to heat wax products above their congealing point for further refining and to heat process piping to transport the wax products to the various processing units. Due to the recent repurposing of the oil refinery into a product blending and storage facility, the oil refinery will not be able to supply high-pressure steam. This project entails installing steam boilers to meet the plant's steam requirements. The steam boilers will be fully integrated into the existing plant and PLC automated infrastructure. Once installed and commissioned the steam boilers will satisfy the steam requirement of all four wax processing units and auxiliaries. This new installation will make the wax facility independent and fully operational. © 2024 IEEE.

关键词： Petrochemical plants

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