检索结果-南通市图书馆

CSEE Journal of Power and Energy Systems 2022年第3期8卷 682-695页

作者： Praveen Kumar Bonthagorla Suresh Mikkili department of electrical and electronics engineering National Institute of TechnologyGoaIndia

Currently,the critical challenge in solar photovoltaic(PV)systems is to make them energy *** of the key factors that can reduce the PV system power output is partial shading conditions(PSCs).The reduction in power output not only depends on a shaded region but also depends on the pattern of shading and physical position of shaded modules in the *** to PSCs,mismatch losses are induced between the shaded modules which can cause several peaks in the output power-voltage(P-V)*** series-parallel(SP),total-cross-tied(TCT),bridge-link(BL),honey-comb(HC),and triple-tied(TT)configurations are considered as conventional configurations,which are severely affected by PSCs and generate more mismatch power losses along with a greater number of local *** reduce the effect of PSCs,hybrid PV array configurations,such as series-parallel:total-cross-tied(SP-TCT),bridge-link:total-cross-tied(BL-TCT),honey-comb:total-cross-tied(HC-TCT)and bridge-link:honey-comb(BL-HC)are *** paper briefly discusses the modeling,simulation and performance evaluation of hybrid and conventional 7×7 PV array configurations during different PSCs in a Matlab/Simulink *** performance of hybrid and conventional PV configurations are evaluated and compared in terms of global maximum power(GMP),voltage and currents at GMP,open and short circuit voltage and currents,mismatch power loss(MPL),fill factor,efficiency,and a number of local maximum power peaks(LMPPs).

关键词： Fill factor global maximum power(GMP) hybrid PV array configuration maximum power point(MPP) mismatch power loss(MPL) partial shading triple-tied(TT)

Performance investigation of artificial intelligence based controller for three phase four leg shunt active filter

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Energy 2015年第4期9卷 446-460页

作者： J. JAYACHANDRAN R. MURALI SACHITHANANDAM department of electrical and electronics engineering SASTRA University Thanjavur 613401 India

In this paper, the choice of power quality compensator is a DSTATCOM which constitutes a three phase four leg voltage source converter （VSC） with a DC capacitor. The control strategy proposed for the DSTAT- COM is a neural network based one cycle control （OCC）. This control strategy involves neural network block, digital circuits and linear elements, which eliminates the sensors required for sensing the load current and coupling inductor current in addition to the multiplier employed in the conventional method. The calculation of harmonic and reactive currents for the reference current generation is also eliminated, thus minimizing the complexity in the control strategy. The control strategy mitigates harmonic/reactive currents, ensures balanced and sinusoidal source current from the supply mains that are nearly in phase with the supply voltage, compensates neutral current, and maintains voltage across the capacitor under unbalanced source and load conditions. The performance of the DSTATCOM with the proposed artificial neural network （ANN） controllers is validated and investigated through simulations using Matlab software. The simulation results prove the efficacy of the proposed neural network based control strategy under varying source and load conditions.

关键词： neural network DSTATCOM neutral currentmitigation total harmonic distortion (THD) three phasefour wire distribution system unbalanced and/or distortedsource

A Typical Review on Static Reconfiguration Strategies in Photovoltaic Array Under Non-Uniform Shading Conditions

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2023年第6期9卷 2018-2039页

作者： Chavan Vinaya Chandrakant Suresh Mikkili department of electrical and electronics engineering National Institute of Technology GoaIndia

Maximum power extraction from the photovoltaic(PV) system plays a critical role in increasing efficiency duringpartial shading conditions (PSCs). It directly reduces the outputpower of the PV array. There are different factors, such as bypassdiode configuration, array size, array configuration, shade intensity, environmental conditions etc., affecting the performance ofthe solar photovoltaic panel. Furthermore, series (S), parallel (P),series-parallel (SP), total-cross-tied (TCT), bridge-linked (BL),and honey-comb (HC), etc., are the various configurations to dealwith the mentioned issues. But these PV array configurations alsohave drawbacks, such as low dispersion factor, mismatch losses,and line losses under partial shading conditions. To overcomethese issues, the reconfiguration of the PV array is one of theeffective approaches. A comprehensive study of literature showsthat PV modules are connected under different reconfiguredschemes namely Sudoku, Optimal Sudoku, Magic square, zigzag, Skyscraper, etc. In this paper, a comprehensive review isperformed to highlight the advantages and limitations of eachscheme. This study can be used to address the advancementin this area since some parameter comparisons are made at theend of every technique, which might be a prominent base-rule forpicking the most promising reconfiguration technique for furtherresearch.

关键词： Data visualization fault diagnosis IoT network photovoltaic system wireless remote monitoring

Performance Analysis of Modulation Techniques in 5G Communication System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Communications 2022年第8期19卷 100-114页

作者： Muhammet Tahir Guneser Ahmed Salahaldeenali Sahab Cihat Seker electrical and electronics engineering department Engineering FacultyKarabuk UniversityTurkey

In the 5^(th) generation mobile communication(5G)system,better bitrate,better power consumption,and better Bit Error Rate are *** meet all these requirements in 5G,the waveform is *** the Orthogonal Frequency Division Multiplexing(OFDM)modulation scheme has been commonly used in 4G,it is difficult to meet the requirements of 5G.A lot of candidate waveforms are discussed in the 5G system included Filter Bank Multicarrier(FBMC),Universal Filtered Multicarrier(UFMC),Filtered OFDM(F-OFDM),and Generalized Frequency Division Multiplexing(GFDM),***,since GFDM is no longer widely used,in this paper,FBMC,UFMC,and F-OFDM modulation schemes are discussed and compared with *** Spectral Density(PSD),Bit Error Rate(BER),Transmitted Signal Power,Peak Average Power Ratio(PAPR)and Bit Rate parameters of the modulation schemes are studied and compared with *** demonstrates to be the most promising modulation scheme for 5G systems.

关键词： PSD PAPR OFDM FBMC UFMC FOFDM

Analysis of Nonlinear electrical Circuits Using Bernstein Polynomials

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2012年第1期9卷 81-86页

作者： M. Arounassalame department of electrical and electronics engineering Pondicherry Engineering College

In electrical circuit analysis, it is often necessary to find the set of all direct current （d.c.） operating points （either voltages or currents） of nonlinear circuits. In general, these nonlinear equations are often represented as polynomial systems. In this paper, we address the problem of finding the solutions of nonlinear electrical circuits, which are modeled as systems of n polynomial equations contained in an n-dimensional box. Branch and Bound algorithms based on interval methods can give guaranteed enclosures for the solution. However, because of repeated evaluations of the function values, these methods tend to become slower. Branch and Bound algorithm based on Bernstein coefficients can be used to solve the systems of polynomial equations. This avoids the repeated evaluation of function values, but maintains more or less the same number of iterations as that of interval branch and bound methods. We propose an algorithm for obtaining the solution of polynomial systems, which includes a pruning step using Bernstein Krawczyk operator and a Bernstein Coefficient Contraction algorithm to obtain Bernstein coefficients of the new domain. We solved three circuit analysis problems using our proposed algorithm. We compared the performance of our proposed algorithm with INTLAB based solver and found that our proposed algorithm is more efficient and fast.

关键词： Nonlinear circuit analysis Bernstein polynomials Krawczyk operator interval analysis polynomial system

Salp Swarm Algorithm for Solving Optimal Power Flow Problem with Thyristor-Controlled Series Capacitor

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2022年第2期20卷 111-119页

作者： Balasubbareddy Mallala Divyanshi Dwivedi the department of electrical and electronics engineering Chaitanya Bharathi Institute of TechnologyHyderabad 500075 the department of electrical and electronics engineering Indian Institute of TechnologyHyderabad 502284

In this paper, a salp swarm algorithm(SSA) is proposed for solving the optimal power flow(OPF)problem of a power system with the incorporation of the thyristor-controlled series capacitor(TCSC). The proposed methodology is implemented for determining the optimal setting of control variables for the OPF problem, which includes the real power of generators buses, voltages of generator buses, reactive power injected by shunt compensators, and tap changing transformer ratios. The performance of the proposed approach is validated and tested on the standard IEEE-30 bus system and single-objective functions, including transmission line losses. The severity factor has been minimized and the result obtained is compared with the existing algorithms. Simulation results achieved with the proposed SSA approach demonstrate that it results in an effective and better solution for the OPF problem.

关键词： optimal Optimal power

Selective Harmonics Elimination Technique for Artificial Bee Colony Implementation

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & engineering 2023年第6期45卷 2721-2740页

作者： T.DeepikaVinothini R.Karthigaivel J.BarsanaBanu department of electrical and electronics engineering Velammal College of Engineering and TechnologyMaduraiIndia department of electrical and electronics engineering PSNA College of Engineering and TechnologyDindigulIndia department of electrical and electronics engineering SBM College of Engineering and TechnologyDindigulIndia

In this research,an Artificial Bee Colony(ABC)algorithm based Selective Harmonics Elimination(SHE)technique is used as a pulse generator in a reduced switch fifteen level inverter that receives input from a PV *** width modulation based on Selective Harmonics Elimination is mostly used to suppress lower-order harmonics.A high gain DC-DC-SEPIC converter keeps the photovoltaic(PV)panel’s output voltage *** Grey Wolf Optimization(GWO)filter removes far more Photovoltaic panel energy from the sunlight *** eliminate voltage harmonics,this unique inverter architecture employs a multi-carrier duty cycle,a high-frequency modulation *** proposed ABC harmonics elimination approach is compared to SHE strategies based on Particle Swarm Optimization(PSO)and Flower Pollination Algorithm(FPA).The suggested system’s performance is simulated and measured using the MATLAB simulation *** proposed ABC approach has a THD level of 4.86%,which is better than the PSO and FPA methods.

关键词： Artificial bee colony photovoltaic flower pollination algorithm multi-carrier

Energy Management Strategies for Modern Electric Vehicles Using MATLAB/Simulink

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2015年第3期13卷 282-288页

作者： Jinesh Pradip Shah Prashant Kumar Soori Sibi Chacko the department of electrical engineering School of Engineering & Physical Sciences Heriot Watt University Dubai Campus

The paper describes the various energy management techniques that can be implemented for a modern electric vehicle by using MATLAB/SimuUnk. The Renault Twizy vehicle is considered for MATLAB simulation. Regenerative braking technique is discussed, in which the kinetic energy is converted to electricity to charge the battery of the vehicle when the brakes are applied or when the vehicle is moving down the hill. A solar photovoltaic （PV） on the roof-top of the vehicle is implemented to charge the battery used in the vehicle. The simulation results are highlighted and energy management strategies are presented. The results showed that the speed control of direct current （DC） motor during the motoring mode and regenerative braking mode was successfully achieved by using a bi-directional DC-DC converter and a proportional-integral （PI） controller at various reference speeds set by the user by applying a variable load torques to the motor. The size of solar PV on roof-top of the vehicle was found to be 280 W that charged the 48 V battery of the vehicle by using a bi-directional DC-DC converter, which was evaluated by using MATLAB/Simulink.

关键词： Battery vehicle DC-DC converter DC motor MATLAB

A Novel Triple-tied-cross-linked PV Array Configuration with Reduced Number of Cross-ties to Extract Maximum Power Under Partial Shading Conditions

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2021年第3期7卷 567-581页

作者： Tejavathu Ramesh Kandipati Rajani Anup Kumar Panda department of electrical engineering National Institute of Technology RourkelaIndia department of electrical and electronics engineering National Institute of Technology Andhra PradeshIndia

Partial shadings cause output power reduction from Photovoltaic(PV)arrays due to mismatch *** selection of PV array configurations play a vital role in maximum power *** paper proposes a novel Triple-Tied-Cross-Linked(T-T-C-L)configuration to extract maximum power with a lesser number of cross ties than a Total-Cross-Tied(T-C-T)*** performance of the proposed T-T-C-L configuration has been compared with various conventional PV array configurations,such as Series(S),Parallel(P),Series-Parallel(S-P),Bridge-Link(B-L),Honey-Comb(H-C),and T-C-T under Partial Shading Conditions(PSCs)by considering the 9×9 PV *** PSCs considered are uneven row,column,diagonal,random,short&narrow,short&wide,long&narrow,long&wide shadings and uniform half module *** measures,such as open circuit voltage,short circuit current,maximum power,voltages and currents at maximum power,mismatch losses,fill factor and efficiency have been used for performance analysis of various *** the results,it can be concluded that the performance of the proposed T-T-C-L configuration is optimal compared to other configurations.

关键词： Efficiency fill factor maximum power point mismatch losses partial shading conditions PV array configurations triple-tied-cross-linked

3D resistive RAM cell design for high-density storage class memory—a review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2016年第6期59卷 35-55页

作者： Boris HUDEC Chung-Wei HSU I-Ting WANG Wei-Li LAI Che-Chia CHANG Taifang WANG Karol FRHLICH Chia-Hua HO Chen-Hsi LIN Tuo-Hung HOU department of electronics engineering and Institute of electronics National Chiao-Tung University Institute of electrical engineering Slovak Academy of Sciences Winbond electronics Corporation

In this article, we comprehensively review recent progress in the Re RAM cell technology for 3D integration focusing on a material/device level. First we briefly mention pioneering work on high-density crossbar Re RAM arrays which paved the way to 3D integration. We discuss the two main proposed 3D integration schemes—3D horizontally stacked Re RAM vs 3D Vertical Re RAM and their respective advantages and disadvantages. We follow with the detailed memory cell design on important work in both areas, utilizing either filamentary or interface-limited switching mechanisms. We also discuss our own contributions on Hf O2-based filamentary 3D Vertical Re RAM as well as Ta Ox/Ti O2 bilayer-based self-rectifying 3D Vertical Re RAM. Finally,we summarize the present status and provide an outlook for the nearterm future.

关键词： RRAM ReRAM resistive switching crossbar cross-point storage class memory 3D integration atomic layer deposition selector