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Model Predictive Control Strategy for Residential Battery Energy Storage System in Volatile Electricity Market with Uncertain Daily Cycling Load

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 534-543页

作者： Dejan P.Jovanović Gerard F.Ledwich Geoffrey R.Walker institute of electrical and electronic engineers QueenslandAustralia School of electrical Engineering&Robotics Queensland University of TechnologyBrisbaneAustralia

This paper presents a control strategy for residential battery energy storage systems,which is aware of volatile electricity markets and uncertain daily cycling *** economic benefits of energy trading for prosumers are achieved through a novel modification of a conventional model predictive control(MPC).The proposed control strategy guarantees an optimal global solution for the applied control action.A new cost function is introduced to model the effects of volatility on customer benefits more ***,the newly presented cost function models a probabilistic relation between the power exchanged with the grid,the net load,and the electricity *** probabilistic calculation of the cost function shows the dependence on the mathematical expectation of market price and net *** techniques for calculating this value are *** proposed strategy differs from the stochastic and robust MPC in that the cost is calculated across the market price and net load variations rather than across model constraints and parameter variations.

关键词： Optimal control model predictive control(MPC) energy market nonlinear constrained optimization revenue for battery energy storage system Gaussian mixture model autoregressive integrated moving average model

Improvement of Performance of HfS_2 Transistors Using a Self-Assembled Monolayer as Gate Dielectric

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Chinese Physics Letters 2019年第6期36卷 57-60页

作者： Wen-Lun Zhang Department of electrical and electronic Engineering Tokyo Institute of Technology

This work details a study based on HfS_(2 )transistors utilizing an n-octadecylphosphonic acid-based self-assembled monolayer(SAM)as the gate *** fabrication of the SAM-based two-dimensional(2D)material transistor is simple and can be used to improve the quality of the interface of air-sensitive 2D *** comparison to HfS_(2) transistors utilizing a conventional Al_2O_(3) gate insulator by atomic layer deposition,HfS_(2) transistors utilizing an SAM as the gate dielectric can reduce the operation region from 4 V to 2 V,enhance the field-effect mobility from 0.03 cm^2/Vs to 0.75 cm^2/Vs,improve the sub-threshold swing from 404 m V/dec to 156 m V/dec,and optimize the hysteresis to 0.03 V,thus demonstrating improved quality of the semiconductor/insulator interface.

关键词： Performance HfS2 Self-Assembled Monolayer Gate Dielectric

Analysis of non-uniform hetero-gate-dielectric dual-material control gate TFET for suppressing ambipolar nature and improving radio-frequency performance

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Chinese Physics B 2019年第10期28卷 571-578页

作者： Hui-Fang Xu Jian Cui Wen Sun Xin-Feng Han institute of electrical and electronic Engineering Anhui Science and Technology University

A tunnel field-effect transistor(TFET) is proposed by combining various advantages together, such as non-uniform gate-oxide layer, hetero-gate-dielectric(HGD), and dual-material control-gate(DMCG) technology. The effects of the length of non-uniform gate-oxide layer and dual-material control-gate on the on-state, off-state, and ambipolar currents are investigated. In addition, radio-frequency performance is studied in terms of gain bandwidth product, cut-off frequency,transit time, and transconductance frequency product. Moreover, the length of non-uniform gate-oxide layer and dualmaterial control-gate are optimized to improve the on-off current ratio and radio-frequency performances as well as the suppression of ambipolar current. All results demonstrate that the proposed device not only suppresses ambipolar current but also improves radio-frequency performance compared with the conventional DMCG TFET, which makes the proposed device a better application prospect in the advanced integrated circuits.

关键词： non-uniform gate-oxide layer ambipolar current radio-frequency performances tunnel fieldeffect transistor

Real-time calculation of fragment velocity for cylindrical warheads

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Defence Technology（防务技术） 2019年第3期15卷 264-271页

作者： David Felix Ian Colwill Elias Stipidis Institution of Engineering and Technology Stevenage England Member of British Computer Society London institute of electrical and electronics engineers London

To simulate explosion fragments, it is necessary to predict many variables such as fragment velocity, size distribution and projection angle. For active protection systems these predictions need to be made very quickly, before the weapon hits the target. Fast predictions also need to be made in real time simulations when the impact of many different computer models need to be assessed. The research presented in this paper focuses on creating a fast and accurate estimate of one of these variables - the initial fragment velocity. The Gurney equation was the first equation to calculate initial fragment velocity. This equation, sometimes with modifications, is still used today where finite element analysis or complex mathematical approaches are considered too computationally expensive. This paper enhances and improves Breech’s two-dimensional Gurney equation using available empirical data and the principals of conservation of momentum and energy. The results are computationally quick, providing improved accuracy for estimating initial fragment velocity. This will allow the developed model to be available for real-time simulation and fast computation, with improved accuracy when compared to existing approaches.

关键词： Initial fragment velocity Real-time simulation Cylindrical explosion

Optimal Simultaneous Allocation of Electric Vehicle Charging Stations and Capacitors in Radial Distribution Network Considering Reliability

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Journal of Modern Power Systems and Clean Energy 2024年第5期12卷 1584-1595页

作者： B.Vinod Kumar Aneesa Farhan M A the Department of electrical and electronic Engineering National Institute of Technology TiruchirappalliTamilnaduIndia

The popularity of electric vehicles(EVs)has sparked a greater awareness of carbon emissions and climate *** mobility expansion and EV adoption have led to an increased infrastructure for electric vehicle charging stations(EVCSs),impacting radial distribution networks(RDNs).To reduce the impact of voltage drop,the increased power loss(PL),lower system interruption costs,and proper allocation and positioning of the EVCSs and capacitors are *** paper focuses on the allocation of EVCS and capacitor installations in RDN by maximizing net present value(NPV),considering the reduction in energy losses and interruption *** a part of the analysis considering reliability,several compensation coefficients are used to evaluate failure rates and pinpoint those that will improve *** locate the best nodes for EVCSs and capacitors,the hybrid of grey wolf optimization(GWO)and particle swarm optimization(PSO)(HGWO_PSO)and the hybrid of PSO and Cuckoo search(CS)(HPSO_CS)algorithms are proposed,forming a combination of GWO,PSO,and CS *** impact of EVCSs on NPV is also investigated in this *** effectiveness of the proposed optimization algorithms is validated on an IEEE 33-bus RDN.

关键词： Electric vehicle charging station optimization radial distribution network vehicle-to-grid loss reduction reliability

Observer based sliding mode frequency control for multi-machine power systems with high renewable energy

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Journal of Modern Power Systems and Clean Energy 2018年第3期6卷 473-481页

作者： Ayyarao S.L.V.TUMMALA Ravikiran INAPAKURTHI P.V.RAMANARAO Department of electrical and electronic Engineering GMR Institute of Technology Department of electrical and electronic Engineering University College of Engineering and TechnologyANUGuntur India

With the global consciousness of climate change, renewable energy systems are prioritized over the conventional energy systems. The deep injection of renewables into the power systems is creating several challenges to the grid due to wide variations in their output power depending on the time of the day, weather etc. Of these challenges, frequency change plays a vital role in maintaining the power quality. This paper presents a novel sliding mode controller with non-linear disturbance observer to effectively mitigate the wide changes in the frequency. A sliding mode surface based on estimated disturbance along with states is designed. A sliding mode control law is proposed to compensate disturbances including variations in renewables, load and parameters under mismatched uncertainties. The proposed observer based controller is tested for three area multi-machine power system in MATLAB/Simulink. The simulated results proved to alleviate the frequency variations effectively compared to the conventional controllers.

关键词： Renewable energy Disturbance observer Sliding mode control Disturbance compensation Frequency control

Comparative Analysis of Optimized Output Regulation of A SISO Nonlinear System Using Different Sliding Manifolds

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International Journal of Automation and computing 2017年第4期14卷 450-462页

作者： M. S. Sunila V. Sankaranarayanan K. Sundareswaran Department of electrical and electronic Engineering National Institute of Technology Tiruchirappalli India

This paper presents the design of sliding mode controller for the output regulation of single input single output （SISO） nonlinear systems. The sliding surfaces are designed to force the error dynamics to follow proportional （P）, proportional integral （PI） and proportional integral derivative （PID） dynamics. The controller parameters are obtained using probabilistic particle swarm optimization technique. A judicious selection of various sliding surfaces based on the relative degree of the systems is also elaborated. A detailed comparison of the output regulation for various systems with different relative degree is presented. Numerical simulation shows the effectiveness of the proposed method and robustness of the sliding mode controller.

关键词： Higher order sliding mode nonlinear system sliding manifolds relative degree probabilistic particle swarm optimization.

Design and investigation of dopingless double-gate line tunneling transistor: Analog performance, linearity, and harmonic distortion analysis

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Chinese Physics B 2020年第10期29卷 556-565页

作者： Hui-Fang Xu Xin-Feng Han Wen Sun institute of electrical and electronic Engineering Anhui Science and Technology UniversityFengyang 233100China

The tunnel field-effect transistor (TFET) is proposed by using the advantages of dopingless and line-tunneling technology. The line tunneling is created due to the fact that the gate electric field is aligned with the tunneling direction, which dramatically enhances tunneling area and tunneling current. Moreover, the effects of the structure parameters such as the length between top gate and source electrode, the length between top gate and drain electrode, the distance between bottom gate and drain electrode, and the metal position on the on-state current, electric field and energy band are investigated and optimized. In addition, analog/radio-frequency performance and linearity characteristics are studied. All results demonstrate that the proposed device not only enhances the on/of current ratio and reduces the subthreshold swing, but also offers eight times improvement in cut-off frequency and gain band product as compared with the conventional point tunneling dopingless TFET, at the same time;it shows better linearity and small distortions. This proposed device greatly enhances the potential of applications in dopingless TFET.

关键词： dopingless tunnel field effect transistor line tunneling lincarity parameters

Finite-Difference Time-Domain Analysis of Wave Propagation in a Thin Plasma Layer

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Chinese Physics Letters 2006年第2期23卷 410-412页

作者：刘明海胡希伟江中和张姝潘垣 institute of electrical and electronic Engineering Huazhong University of Science and Technology Wuhan 430074

The propagation property of an electromagnetic wave in with the finite-difference time-domain method. The effects a thin plasma layer at high pressure is investigated of the non-uniformity of plasma distribution, and the frequency of incident wave on the propagation property of the electromagnetic wave are discussed. Numerical results indicate that the phase shift and the reflectivity of wave are sensitive to plasma density distribution, and reflectivity is lower at the middle band of frequency for different plasma distributions.

关键词： ATMOSPHERIC-PRESSURE PLASMAS ELECTROMAGNETIC-WAVE INTERFEROMETRY ATTENUATION DISCHARGE