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Enhancing Renewable Energy Integration:A Gaussian-Bare-Bones Levy Cheetah Optimization Approach to Optimal Power Flow in Electrical Networks
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作者 Ali S.Alghamdi Mohamed A.Zohdy Saad Aldoihi 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第8期1339-1370,共32页
In the contemporary era,the global expansion of electrical grids is propelled by various renewable energy sources(RESs).Efficient integration of stochastic RESs and optimal power flow(OPF)management are critical for n... In the contemporary era,the global expansion of electrical grids is propelled by various renewable energy sources(RESs).Efficient integration of stochastic RESs and optimal power flow(OPF)management are critical for network optimization.This study introduces an innovative solution,the Gaussian Bare-Bones Levy Cheetah Optimizer(GBBLCO),addressing OPF challenges in power generation systems with stochastic RESs.The primary objective is to minimize the total operating costs of RESs,considering four functions:overall operating costs,voltage deviation management,emissions reduction,voltage stability index(VSI)and power loss mitigation.Additionally,a carbon tax is included in the objective function to reduce carbon emissions.Thorough scrutiny,using modified IEEE 30-bus and IEEE 118-bus systems,validates GBBLCO’s superior performance in achieving optimal solutions.Simulation results demonstrate GBBLCO’s efficacy in six optimization scenarios:total cost with valve point effects,total cost with emission and carbon tax,total cost with prohibited operating zones,active power loss optimization,voltage deviation optimization and enhancing voltage stability index(VSI).GBBLCO outperforms conventional techniques in each scenario,showcasing rapid convergence and superior solution quality.Notably,GBBLCO navigates complexities introduced by valve point effects,adapts to environmental constraints,optimizes costs while considering prohibited operating zones,minimizes active power losses,and optimizes voltage deviation by enhancing the voltage stability index(VSI)effectively.This research significantly contributes to advancing OPF,emphasizing GBBLCO’s improved global search capabilities and ability to address challenges related to local minima.GBBLCO emerges as a versatile and robust optimization tool for diverse challenges in power systems,offering a promising solution for the evolving needs of renewable energy-integrated power grids. 展开更多
关键词 Renewable energy integration optimal power flow stochastic renewable energy sources gaussian-bare-bones levy cheetah optimizer electrical network optimization carbon tax optimization
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State Estimation Approach for Combined Heat and Electric Networks 被引量:1
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作者 Tongtian Sheng Guanxiong Yin +4 位作者 Bin Wang Qinglai Guo Jinni Dong Hongbin Sun Zhaoguang Pan 《CSEE Journal of Power and Energy Systems》 SCIE EI CSCD 2022年第1期225-237,共13页
State estimation(SE)is essential for combined heat and electric networks(CHENs)to provide a global and selfconsistent solution for multi-energy flow analysis.This paper proposes an SE approach for CHEN based on steady... State estimation(SE)is essential for combined heat and electric networks(CHENs)to provide a global and selfconsistent solution for multi-energy flow analysis.This paper proposes an SE approach for CHEN based on steady models of electric networks(ENs)and district heating networks(DHNs).A range of coupling components are considered.The performance of the proposed estimator is evaluated using Monte Carlo simulations and case studies.Results show that a relationship between the measurements from ENs and DHNs can improve the estimation accuracy for the entire network by using the combined SE model,especially when ENs and DHNs are strongly coupled.The coupling constraints could also provide extra redundancy to detect bad data in the boundary injection measurements of both networks.An analysis of computation time shows that the proposed method is suitable for online applications. 展开更多
关键词 Bad data identification combined heat and electric networks coupling component state estimation steady model
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Long-lasting,reinforced electrical networking in a high-loading Li_(2)S cathode for high-performance lithium–sulfur batteries 被引量:3
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作者 Hun Kim Kyeong-Jun Min +4 位作者 Sangin Bang Jang-Yeon Hwang Jung Ho Kim Chong SYoon Yang-Kook Sun 《Carbon Energy》 SCIE CSCD 2023年第8期1-14,共14页
Realizing a lithium sulfide(Li_(2)S)cathode with both high energy density and a long lifespan requires an innovative cathode design that maximizes electrochemical performance and resists electrode deterioration.Herein... Realizing a lithium sulfide(Li_(2)S)cathode with both high energy density and a long lifespan requires an innovative cathode design that maximizes electrochemical performance and resists electrode deterioration.Herein,a high-loading Li_(2)S-based cathode with micrometric Li_(2)S particles composed of two-dimensional graphene(Gr)and one-dimensional carbon nanotubes(CNTs)in a compact geometry is developed,and the role of CNTs in stable cycling of high-capacity Li–S batteries is emphasized.In a dimensionally combined carbon matrix,CNTs embedded within the Gr sheets create robust and sustainable electron diffusion pathways while suppressing the passivation of the active carbon surface.As a unique point,during the first charging process,the proposed cathode is fully activated through the direct conversion of Li_(2)S into S_(8) without inducing lithium polysulfide formation.The direct conversion of Li_(2)S into S_(8) in the composite cathode is ubiquitously investigated using the combined study of in situ Raman spectroscopy,in situ optical microscopy,and cryogenic transmission electron microscopy.The composite cathode demonstrates unprecedented electrochemical properties even with a high Li_(2)S loading of 10 mg cm^(–2);in particular,the practical and safe Li–S full cell coupled with a graphite anode shows ultra-long-term cycling stability over 800 cycles. 展开更多
关键词 carbon nanotubes electrical network high energy high loading Li_(2)S cathode lithium-sulfur batteries
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Quantitative evaluation of extrinsic factors influencing electrical excitability in neuronal networks: Voltage Threshold Measurement Method(VTMM)
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作者 Shuai An Yong-Fang Zhao +1 位作者 Xiao-Ying Lu Zhi-Gong Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第6期1026-1035,共10页
The electrical excitability of neural networks is influenced by different environmental factors. Effective and simple methods are required to objectively and quantitatively evaluate the influence of such factors, incl... The electrical excitability of neural networks is influenced by different environmental factors. Effective and simple methods are required to objectively and quantitatively evaluate the influence of such factors, including variations in temperature and pharmaceutical dosage. The aim of this paper was to introduce ‘the voltage threshold measurement method', which is a new method using microelectrode arrays that can quantitatively evaluate the influence of different factors on the electrical excitability of neural networks. We sought to verify the feasibility and efficacy of the method by studying the effects of acetylcholine, ethanol, and temperature on hippocampal neuronal networks and hippocampal brain slices. First, we determined the voltage of the stimulation pulse signal that elicited action potentials in the two types of neural networks under normal conditions. Second, we obtained the voltage thresholds for the two types of neural networks under different concentrations of acetylcholine, ethanol, and different temperatures. Finally, we obtained the relationship between voltage threshold and the three influential factors. Our results indicated that the normal voltage thresholds of the hippocampal neuronal network and hippocampal slice preparation were 56 and 31 m V, respectively. The voltage thresholds of the two types of neural networks were inversely proportional to acetylcholine concentration, and had an exponential dependency on ethanol concentration. The curves of the voltage threshold and the temperature of the medium for the two types of neural networks were U-shaped. The hippocampal neuronal network and hippocampal slice preparations lost their excitability when the temperature of the medium decreased below 34 and 33°C or increased above 42 and 43°C, respectively. These results demonstrate that the voltage threshold measurement method is effective and simple for examining the performance/excitability of neuronal networks. 展开更多
关键词 nerve regeneration threshold voltage microelectrode array electrical excitability of neural networks ACETYLCHOLINE ALCOHOL temperature hippocampal neuronal network hippocampal slice electrical stimulation action potentials neural regeneration
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Determination of Effective Load Shedding Schemes in Electric Power Plants 被引量:1
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作者 Godwin Effiong Priye Kenneth Ainah Jackson Karniliyus 《Energy and Power Engineering》 2020年第10期555-567,共13页
The ability of power system to survive the transition from preloading state to the gradual increase in load and thereafter reach an acceptable operational condition is an indication of transient stability of the syste... The ability of power system to survive the transition from preloading state to the gradual increase in load and thereafter reach an acceptable operational condition is an indication of transient stability of the system. The study analyzed load shedding scheme through the use of empirical measurement tools and load-flow simulation techniques. It was geared towards determining effective load shedding strategies to reduce unnecessary overload in order to achieve dynamic stability of the electric power network in the Export Free Trade Zone, Calabar, Nigeria. From the tests and the measurements taken, it was observed that the real and reactive powers from the generator and the mechanical power from the turbine engine were stable when the load shedding controller was switched on, as compared to when it was off. The engine speed, the bus-bar frequency and the output voltage of the generator stabilized within a shorter time (about 8 seconds) when the controller was switched on than when it was on the off condition. Also, there were noticeable fluctuations in the speed of the remaining two generators. It became stable at about 12 seconds after the loss. The variations were 0.3 per cent of the nominal speed value. The excitation voltage fluctuated from 1.2 (pu) to 4.5 (pu) when the bus voltage dipped as a result of additional load. It then came down and stabilized at 1.8 (pu) after few swings. This confirmed that the stability of power system is much enhanced when load shedding controllers are effectively configured on the network. 展开更多
关键词 Power System Transient Stability Load Shedding Scheme electric Power Network
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Global Harmonic Rate Assessment in the Electricity Distribution Network in Niamey City:Case Studies of Domestic,Industrial and Hospital Substations 被引量:1
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作者 Abdourahimoun Daouda Saidou Madougou Abdoul Aziz Ibrahim 《Energy and Power Engineering》 2017年第12期786-801,共16页
Like others countries of the world, in Niger also, we are witnessing an increasing use of non-linear electric loads in the domestic, hospital and industrial sectors. However, these loads degrade the shape of the elect... Like others countries of the world, in Niger also, we are witnessing an increasing use of non-linear electric loads in the domestic, hospital and industrial sectors. However, these loads degrade the shape of the electrical signal and cause disastrous effects to the equipment of the distribution system and the devices which are connected to the network. This article highlights the presence of electric harmonics in the distribution network in Niamey city. In order to do this, measurements were taken at the secondary level of the substations using an energy quality analyze r (FLUKE 1735). By using this measuring instrument, we quantified the voltage and current Total Harmonic Distortion (THD) in the three substations. The results obtained show that, although the statutable rates set by the standards are not exceeded for phase conductors, the neutral contains a very critical percentage of distortion on the residential and hospital substations. Moreover, this assessment made it possible to observe the variation of harmonics in the presence of voltage drops. 展开更多
关键词 electric Power Distribution Network Harmonic Disturbance Total Harmonic Distortion(THD) Power Quality Distribution Network
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Modeling of the Coupling of the Lightning Shock Wave Flow Circuit in the High Voltage Electrical Network
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作者 Mwanamputu Mbwanzo Timothée Nsongo +2 位作者 Pasi Bengi Masata Andre Flory Lidinga Mobonda Mathurin Gogom 《Energy and Power Engineering》 CAS 2022年第8期404-419,共16页
This article focuses on the aggression of lightning overload on the equipment of the electrical network of sites where storm activity is very dense;and the electrocution of people located in the direct environment of ... This article focuses on the aggression of lightning overload on the equipment of the electrical network of sites where storm activity is very dense;and the electrocution of people located in the direct environment of the high-voltage substation during the flow of lightning current to the ground through the ground socket. The modeling of the flow circuit of the shock wave consisting of guard wire, lightning arrester and ground socket couple to the transformer of the high voltage substations, thanks to the approach of a servo block, led to the synthesis of a PID regulator (corrector) whose action is to reject the effects of the overvoltage on the network equipment and to significantly reduce or even cancel the effects of the step or touch voltage due to the distribution of the potential around the ground socket;and thus improve the quality of service of the high-voltage transmission and distribution electricity network, especially in stormy times. 展开更多
关键词 Modeling COUPLING Flow Circuit Shock Wave LIGHTNING electrical Network High Voltage
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An Exact Solution of Telegraph Equations for Voltage Monitoring of Electrical Transmission Line
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作者 Daouda Konane Wend Yam Serge Boris Ouedraogo +3 位作者 Toussaint Tilado Guingane Abdoulaye Zongo Zacharie Koalaga François Zougmoré 《Energy and Power Engineering》 CAS 2022年第11期669-679,共11页
Telegraph equations are derived from the equations of transmission line theory. They describe the relationships between the currents and voltages on a portion of an electric line as a function of the linear constants ... Telegraph equations are derived from the equations of transmission line theory. They describe the relationships between the currents and voltages on a portion of an electric line as a function of the linear constants of the conductor (resistance, conductance, inductance, capacitance). Their resolution makes it possible to determine the variation of the current and the voltage as a function of time at each point of the line. By adopting a general sinusoidal form, we propose a new exact solution to the telegraphers’ partial differential equations. Different simulations have been carried out considering the parameter of the 12/20 (24) kV Medium Voltage Cable NF C 33,220. The curves of the obtained solution better fit the real voltage curves observed in the electrical networks in operation. 展开更多
关键词 Telegraph Equation electric Network Voltage Variation electrical Transmission Lines Analytical Solution
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Improvement of the Voltage Quality in an Electrical Network via the Loopback: Case of the Southern Interconnected Grid (SIG) of Cameroon
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作者 Raissa Onanena Roger Tchuidjan +1 位作者 Frederic Biya Motto Manuella Mamche Gatchessi 《Journal of Power and Energy Engineering》 2021年第3期25-41,共17页
Electricity being a basic national infrastructure for a country, its security, reliability and quality are the most important parameters for the network managers. Several methods are generally used to improve the volt... Electricity being a basic national infrastructure for a country, its security, reliability and quality are the most important parameters for the network managers. Several methods are generally used to improve the voltage quality more and more. However, most of the means implemented depend on external factors independent of the network managers or require huge regular financial resources. The method used in this paper is the loopback, applied to the Southern Interconnected Grid (SIG) of Cameroon, which is the largest net</span><span style="font-family:Verdana;">work in the country. The procedure used takes into account nodes experiencing huge voltage drops and network constraints. The chosen loopback</span><span style="font-family:Verdana;"> scenario results in a clear improvement of the voltage plan in this network, and also a discharge of the transformers, a considerable decongestion of the lines, a reduction of the power losses and a significant reduction of the thermal placement used for improvement of the voltage profile. 展开更多
关键词 electrical Network LOOPING the Southern Interconnected Grid (SIG) of Cameroon Voltage Quality
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A Parametric Autoregressive Model for the Extraction of Electric Network Frequency Fluctuations in Audio Forensic Authentication
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作者 Tarek E. Gemayel Martin Bouchard 《Journal of Energy and Power Engineering》 2016年第8期504-512,共9页
This paper proposes a new method for extracting ENF (electric network frequency) fluctuations from digital audio recordings for the purpose of forensic authentication. It is shown that the extraction of ENF componen... This paper proposes a new method for extracting ENF (electric network frequency) fluctuations from digital audio recordings for the purpose of forensic authentication. It is shown that the extraction of ENF components from audio recordings is realizable by applying a parametric approach based on an AR (autoregressive) model. The proposed method is compared to the existing STFT (short-time Fourier transform) based ENF extraction method. Experimental results from recorded electrical grid signals and recorded audio signals show that the proposed approach can improve the time resolution in the extracted ENF fluctuations and improve the detection of tampering with short alterations in longer audio recordings. 展开更多
关键词 Audio forensic authentication electric network frequency fluctuations autoregressive modeling tampering anddiscontinuity detection.
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Evaluation of Grid-Connected Photovoltaic Plants Based on Clustering Methods
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作者 Amr A.Munshi 《Computer Systems Science & Engineering》 SCIE EI 2023年第6期2837-2852,共16页
Photovoltaic(PV)systems are electric power systems designed to sup-ply usable solar power by means of photovoltaics,which is the conversion of light into electricity using semiconducting materials.PV systems have gain... Photovoltaic(PV)systems are electric power systems designed to sup-ply usable solar power by means of photovoltaics,which is the conversion of light into electricity using semiconducting materials.PV systems have gained much attention and are a very attractive energy resource nowadays.The substantial advantage of PV systems is the usage of the most abundant and free energy from the sun.PV systems play an important role in reducing feeder losses,improving voltage profiles and providing ancillary services to local loads.However,large PV grid-connected systems may have a destructive impact on the stability of the elec-tric grid.This is due to thefluctuations of the output AC power generated from the PV systems according to the variations in the solar energy levels.Thus,the elec-trical distribution system with high penetration of PV systems is subject to perfor-mance degradation and instabilities.For that,this project attempts to enhance the integration process of PV systems into electrical grids by analyzing the impact of installing grid-connected PV plants.To accomplish this,an indicative representa-tion of solar irradiation datasets is used for planning and powerflow studies of the electric network prior to PV systems installation.Those datasets contain lengthy historical observations of solar energy data,that requires extensive analysis and simulations.To overcome that the lengthy historical datasets are reduced and clus-tered while preserving the original data characteristics.The resultant clusters can be utilized in the planning stage and simulation studies.Accordingly,studies related to PV systems integration into the electric grid are conducted in an efficient manner,avoiding computing resources and processing times with easier and practical implementation. 展开更多
关键词 CLUSTERING electric grid electric network PHOTOVOLTAIC
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Optimization of the Placement and Size of Photovoltaic Source
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作者 Maawiya Ould Sidi Mustafa Mosbah Rabie Zine 《Computers, Materials & Continua》 SCIE EI 2023年第1期1855-1870,共16页
This paper presents a new optimization study of the placement and size of a photovoltaic source(PVS)in a distribution grid,based on annual records of meteorological parameters(irradiance,temperature).Based on the reco... This paper presents a new optimization study of the placement and size of a photovoltaic source(PVS)in a distribution grid,based on annual records of meteorological parameters(irradiance,temperature).Based on the recorded data,the production output as well as the daily average power(24-h vector)of the PVS is extracted over the year.When a power vector is available,it can be used as an input when searching for the optimal size of the PVS.This allows to take into account the constraint of the variation of the power generated by this source considering the variation of the power consumed by the electrical loads during the whole day.A multi-objective fitness function has been considered.The latter minimizes the active losses and maximizes the voltage stability index during the day,while considering the constraints of the system,that is,the security,technical,geographical,and meteorological constraints.This problem was solved using the Non-dominated Sorting Genetic Algorithm NSGA-II optimization technique under MATLAB 2021.It was applied to the distribution network of Ghardaïa of 59 nodes. 展开更多
关键词 electric distribution network intermittent generation photovoltaic source multi-objective optimization active losses profile voltage stability index profile
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Research and implementation of a new web cache strategy
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作者 易法令 谢长生 +1 位作者 韩德志 蔡斌 《Journal of Southeast University(English Edition)》 EI CAS 2004年第4期448-453,共6页
This paper presented a new shared cache technique-the grouping cache, which could solve many invalid queries in the broadcast probe and the control bottleneck of the centralized web cache by dividing all cooperative c... This paper presented a new shared cache technique-the grouping cache, which could solve many invalid queries in the broadcast probe and the control bottleneck of the centralized web cache by dividing all cooperative caches into several groups according to their positions in the network topology. The technique has the following characteristics: The overhead of multi-cache query can be reduced efficiently by the cache grouping scheme; the compact summary of the cache directory can rapidly determine if a request exists in a cache within the group; the distribution algorithm based on the web-access logs can effectively balance the load among all the groups. The simulation test demonstrated that the grouping cache was more effective than any other existing shared cache techniques. 展开更多
关键词 Bandwidth BROADCASTING electric network topology HTTP Internet Schematic diagrams World Wide Web
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A Hybrid State Estimation Approach for Integrated Heat and Electricity Networks Considering Time-scale Characteristics 被引量:8
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作者 Tongtian Sheng Guanxiong Yin +2 位作者 Qinglai Guo Hongbin Sun Zhaoguang Pan 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2020年第4期636-645,共10页
State estimation(SE)usually serves as the basic function of the energy management system(EMS).In this paper,the time-scale characteristics of the integrated heat and electricity networks are studied and an SE model is... State estimation(SE)usually serves as the basic function of the energy management system(EMS).In this paper,the time-scale characteristics of the integrated heat and electricity networks are studied and an SE model is established.Then,a two-stage iterative algorithm is proposed to estimate the time delay of heat power transportation in the pipeline.Meanwhile,to accommodate the measuring resolutions of the integrated network,a hybrid SE approach is developed based on the two-stage iterative algorithm.Results show that,in both steady and dynamic processes,the two-stage estimator has good accuracy and convergence.The hybrid estimator has good performance on tracking the variation of the states in the heating network,even when the available measurements are limited. 展开更多
关键词 Integrated heat and electricity network measurement resolution state estimation(SE) time-scale characteristics
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Combined optical fiber interferometric sensors for the detection of acoustic emission 被引量:2
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作者 LIANG Yi-jun MU Lin-lin LIU Jun-feng YU Xiao-tao 《Optoelectronics Letters》 EI 2008年第3期184-187,共4页
A type of combined optical fiber interferometric acoustic emission sensor is proposed. The sensor can be independent on the laser source and make light interference by matching the lengths of two arms,so it can be use... A type of combined optical fiber interferometric acoustic emission sensor is proposed. The sensor can be independent on the laser source and make light interference by matching the lengths of two arms,so it can be used to monitor the health of large structure. Theoretical analyses indicate that the system can be equivalent to the Michelson interferometer with two optical fiber loop reflectors,and its sensitivity has been remarkably increased because of the decrease of the losses of light energy. PZT is powered by DC regulator to control the operating point of the system,so the system can accurately detect feeble vibration which is generated by ultrasonic waves propagating on the surface of solid. The amplitude and the frequency of feeble vibration signal are obtained by detecting the output light intensity of interferometer and using Fourier transform technique. The results indicate that the system can be used to detect the acoustic emission signals by the frequency characteristics. 展开更多
关键词 Acoustic emissions Acoustics electric network analysis Fiber optics Fibers Fourier transforms Geodetic satellites INTERFEROMETERS Interferometry Lattice vibrations Light sources Michelson interferometers Optical fibers Optical in Acoustic emission sensors Acoustic Emission signals Fiber loop reflectors Fourier Frequency characteristics Interferometric sensors Laser sources Light energy Light intensities Operating points OPTICAL Vibration signals
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Chance-constrained Coordinated Optimization for Urban Electricity and Heat Networks 被引量:8
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作者 Zhinong Wei Juan Sun +5 位作者 Zhoujun Ma Guoqiang Sun Haixiang Zang Sheng Chen Side Zhang Kwok W.Cheung 《CSEE Journal of Power and Energy Systems》 SCIE 2018年第4期399-407,共9页
Urban electricity and heat networks(UEHN)consist of the coupling and interactions between electric power systems and district heating systems,in which the geographical and functional features of integrated energy syst... Urban electricity and heat networks(UEHN)consist of the coupling and interactions between electric power systems and district heating systems,in which the geographical and functional features of integrated energy systems are demonstrated.UEHN have been expected to provide an effective way to accommodate the intermittent and unpredictable renewable energy sources,in which the application of stochastic optimization approaches to UEHN analysis is highly desired.In this paper,we propose a chance-constrained coordinated optimization approach for UEHN considering the uncertainties in electricity loads,heat loads,and photovoltaic outputs,as well as the correlations between these uncertain sources.A solution strategy,which combines the Latin Hypercube Sampling Monte Carlo Simulation(LHSMCS)approach and a heuristic algorithm,is specifically designed to deal with the proposed chance-constrained coordinated optimization.Finally,test results on an UEHN comprised of a modified IEEE 33-bus system and a 32-node district heating system at Barry Island have verified the feasibility and effectiveness of the proposed framework. 展开更多
关键词 Chance-constrained optimal power flow(CCOPF) correlated uncertainties combined Latin Hypercube Sampling Monte Carlo Simulation(LHSMCS)approach and heuristic algorithm urban electricity and heat networks(UEHN)
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Consensus Seeking for Discrete-time Multi-agent Systems with Communication Delay 被引量:5
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作者 Zhenhua Wang Juanjuan Xu Huanshui Zhang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI 2015年第2期151-157,共7页
This paper studies the consensus problem for discrete-time multi-agent systems of first-order in the presence of constant communication delay. Provided that the agent dynamics is unstable and the network topology is u... This paper studies the consensus problem for discrete-time multi-agent systems of first-order in the presence of constant communication delay. Provided that the agent dynamics is unstable and the network topology is undirected, effects of two kinds of communication delays on consensus are investigated. When the relative information is affected by delay, we show that the effect of delay can be alleviated by using the historical input information in the protocol design. On the other hand, if the communication delay only influences the actually transmitted information, sufficient condition admitting any large yet bounded delay for consensus is obtained, and the delay in this case is allowed to be unknown and time-varying. Finally, simulation results are provided to demonstrate the effectiveness of the theoretical results. © 2014 Chinese Association of Automation. 展开更多
关键词 electric network topology
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Fast Distributed Demand Response Algorithm in Smart Grid 被引量:2
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作者 Qifen Dong Li Yu +3 位作者 Wenzhan Song Junjie Yang Yuan Wu Jun Qi 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2017年第2期280-296,共17页
This paper proposes a fast distributed demand response U+0028 DR U+0029 algorithm for future smart grid based on primaldual interior method and Gaussian belief propagation U+0028 GaBP U+0029 solver. At the beginning o... This paper proposes a fast distributed demand response U+0028 DR U+0029 algorithm for future smart grid based on primaldual interior method and Gaussian belief propagation U+0028 GaBP U+0029 solver. At the beginning of each time slot, each end-user U+002F energysupplier exchanges limited rounds of messages that are not private with its neighbors, and computes the amount of energy consumption U+002F generation locally. The proposed demand response algorithm converges rapidly to a consumption U+002F generation decision that yields the optimal social welfare when the demands of endusers are low. When the demands are high, each end-user U+002F energysupplier estimates its energy consumption U+002F generation quickly such that a sub-optimal social welfare is achieved and the power system is ensured to operate within its capacity constraints. The impact of distributed computation errors on the proposed algorithm is analyzed theoretically. The simulation results show a good performance of the proposed algorithm. © 2017 Chinese Association of Automation. 展开更多
关键词 electric power transmission networks Energy utilization
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Electrical Properties of Medium Voltage Electricity Distribution Networks 被引量:1
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作者 Sathsara Abeysinghe Muditha Abeysekera +1 位作者 Jianzhong Wu Mahesh Sooriyabandara 《CSEE Journal of Power and Energy Systems》 SCIE CSCD 2021年第3期497-509,共13页
An increasing amount of low carbon technologies(LCT)such as solar photovoltaic,wind turbines and electric vehicles are being connected at medium and low voltage levels to electric power networks.To support high-level ... An increasing amount of low carbon technologies(LCT)such as solar photovoltaic,wind turbines and electric vehicles are being connected at medium and low voltage levels to electric power networks.To support high-level decision-making processes,the impacts of the LCTs on large numbers of different types(e.g.,rural,suburban,urban)of distribution networks need to be fully understood and quantified.However,detailed modeling of large numbers of real-world networks is challenging for two reasons.First,access to real-world network data is limited,and second,cleaning the data requires a significant amount of time,even before modeling of the networks.This paper offers a novel systematic methodology aimed at identifying and quantifying the key electrical properties of medium-voltage level distribution networks.The methodology allows for characterizing different types(e.g.,suburban,urban)of distribution networks and obtaining'depth'dependent electrical properties of the models of the networks.Two key sets of(electrical)data were used for the study.The first set was installed capacities of distribution substations;and the second set was the conductor cross sections of the distribution lines.In the graph models of real-world networks,'nodes'represent the distribution sub-stations,switchgears,busbars and consumers locations of the network.'Links/edges'stand for the connections between the nodes through distribution lines.The results of the investigation of the real-world networks showed that,the substation capacities and the conductor cross sections could characterize the electrical properties of suburban and urban type distribution networks.The resulted probability density functions(PDF)of the electrical properties of suburban and urban type distribution networks have the potential to be directly used in generating realistic distribution network models. 展开更多
关键词 electricity distribution networks electrical properties medium voltage synthetic networks statistically-similar networks
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A Vehicle Routing Problem Based on Intelligent Batteries Transfer Management for the EV Network 被引量:2
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作者 XIA Yamei CHENG Bo 《China Communications》 SCIE CSCD 2014年第5期160-169,共10页
Batteries transfer management is one important aspect in electric vehicle(EV)network's intelligent operation management system.Batteries transfer is a special and much more complex VRP(Vehicle Routing Problem) whi... Batteries transfer management is one important aspect in electric vehicle(EV)network's intelligent operation management system.Batteries transfer is a special and much more complex VRP(Vehicle Routing Problem) which takes the multiple constraints such as dynamic multi-depots,time windows,simultaneous pickups and deliveries,distance minimization,etc.into account.We call it VRPEVB(VRP with EV Batteries).This paper,based on the intelligent management model of EV's battery power,puts forward a battery transfer algorithm for the EV network which considers the traffic congestion that changes dynamically and uses improved Ant Colony Optimization.By setting a reasonable tabv range,special update rules of the pheromone and path list memory functions,the algorithm can have a better convergence,and its feasibility is proved by the experiment in an EV's demonstration operation system. 展开更多
关键词 VRP battery power management ant colony algorithm electric vehicle network
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