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Reconfiguration for loss reduction in Distribution Networks with Dispersed Generations Using Ant Colony Algorithm

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Reconfiguration for Loss Reduction in Distribution Networks ...

U-shaped energy loss curves utilization for distributed generation optimization in distribution networks

2011 World Congress on Engineering and Technology(CET 2011)

作者： M.J.Kasaei M.Gandomkar A.Fakhri Dept. of Electrical Engineering Islamic Azad University-Zarandieh Branch Saveh Iran Dept. of Electrical Engineering Islamic Azad University-Saveh Branch Saveh Iran

This paper presents one of applications of the Ant colony algorithm method for the reconfiguration of distribution networks with dispersed generation （DG） to reduce power losses. The electric power distribution system usually operates in a radial configuration and configuration of distribution networks is defined by tie switches and sectionalized switches. The configuration optimization problem of distribution networks is a combination optimization with a large search space involved the operational constraints of the distribution. DGs include the application of small generators, scattered throughout a power system, to provide the electric power needed by electrical customer. In particular, the term DG implies the use of any modular technology that is sited throughout a utility service area to minimize the cost of services. DG can comprise diesel and internal combustion engines, small gas turbines, fuel cell and photovoltaic. The suggested method has been implemented on sample distribution network with 3 feeders, 16 buses, 16 switches and its results have been presented.

关键词： Distribution system Dispersed generation Reconfiguration loss reduction Ant colony.

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Journal of Zhejiang University-Science C(Computers and Electronics) 2013年第11期14卷 887-898页

作者： Reza EBRAHIMI Mehdi EHSAN Hassan NOURI Department of Electrical Engineering Science and Research BranchIslamic Azad University Centre of Excellence in Power System Management and Control (CEPSMC) Sharif University of Technology Department of Engineering Design and Mathematics University of the West of England (UWE Bristol)

We propose novel techniques to find the optimal location,size,and power factor of distributed generation(DG) to achieve the maximum loss reduction for distribution *** the optimal DG location and size is achieved simultaneously using the energy loss curves technique for a pre-selected power factor that gives the best DG *** on the network's total load demand,four DG sizes are *** are used to form energy loss curves for each bus and then for determining the optimal DG *** study shows that by defining the energy loss minimization as the objective function,the time-varying load demand significantly affects the sizing of DG resources in distribution networks,whereas consideration of power loss as the objective function leads to inconsistent interpretation of loss reduction and other *** devised technique was tested on two test distribution systems of varying size and complexity and validated by comparison with the exhaustive iterative method(EIM) and recently published *** showed that the proposed technique can provide an optimal solution with less computation.

关键词： Distributed generation(DG) Distribution networks loss reduction DG optimization Energy loss curves

Simultaneous allocation of renewable energy sources and custom power quality devices in electrical distribution networks using artificial rabbits optimization

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Clean Energy 2023年第4期7卷 795-807页

作者： Ranga Rao Chegudi Balamurugan Ramadoss Ramakoteswara Rao Alla Department of Electrical Engineering Faculty of Engineering and TechnologyAnnamalai UniversityChidambaramTamilnadu 608002India Department of EEE RVR&JC College of EngineeringGunturAndhra Pradesh 522019India

This study suggests an optimal renewable energy source(RES)allocation and distribution-static synchronous compensator(D-STATCOM)and passive power filters(PPFs)for an electrical distribution network(EDN)to improve its performance and power quality(PQ).First,the latest metaheuristic artificial rabbits optimization(ARO)is used to locate and size solar photovoltaic(PV),wind turbine(WT)and D-STATCOM *** the second stage,ratings of single-tuned PPFs and D-STATCOMs at the RESs are determined,considering non-linear loads in the *** multi-objective function reduces power loss,improves the voltage stability index(VSI)and limits total harmonic *** using the IEEE 33-bus EDN compared the ARO results with those of previous *** the first scenario,ideally integrated D-STATCOMs,PVs and WTs reduced losses by 34.79%,64.74%and 94.15%,*** increases from 0.6965 to 0.7749,0.8804 and *** optimal WT integration of the first scenario outperformed the PVs and *** second step optimizes the WTs and PQ devices for non-linear *** and D-STATCOMs reduce the maximum total harmonic distortion of the voltage waveform by 5.21%with non-linear loads to 3.23%,while WTs and PPFs reduce it to 4.39%.These scenarios demonstrate how WTs and D-STATCOMs can improve network performance and *** computational efficiency of ARO is compared to that of the pathfinder algorithm,future search algorithm,butterfly optimization algorithm and coyote optimization *** speeds up convergence and improves solution quality and comprehension.

关键词： artificial rabbits optimization renewable distribution generation D-STATCOM power quality improvement loss reduction voltage stability enhancement

Effects of Vortex Generator Jet on Corner Separation/Stall in High-Turning Compressor Cascade

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Transactions of Tianjin University 2016年第6期22卷 555-562页

作者：刘华坪李得英陈焕龙张东飞 School of Energy Science and Engineering Harbin Institute of Technology Harbin 150001 China Beijing Electro-Mechanical Engineering Institute CASIC Beijing 100074 China

The effects of the vortex generator jet(VGJ)attached at the endwall on the corner separation/stall control are investigated by numerical simulation in a high-turning linear compressor cascade. The results show that the corner separation could be reduced significantly, which results in a wider operation range as well as a more uniform exit flow angle and total pressure profile. At the near-stall operation point, the maximum relative reduction of the total pressure loss is up to 32.5%,, whereas the jet mass ratio is less than 0.4%,. Based on the analysis of the detailed flow structure, three principal effects of the VGJ on the endwall cross flow and corner separation are identified. One is to increase the tangential velocity component opposite to cross flow, thus inhibiting the endwall secondary flow near the jet exit. The second is to suppress the pitchwise extension of the passage vortex as an air fence. The third is to sweep the low energy fluids towards the mainstream on the up-washed side and to transport the mainstream fluids to the endwall to reenergize the boundary layer on the down-washed side.

关键词： vortex generator jet corner separation high turning compressor loss reduction

Fuzzy stochastic long-term model with consideration of uncertainties for deployment of distributed energy resources using interactive honey bee mating optimization

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Frontiers in Energy 2014年第4期8卷 412-425页

作者： Iraj AHMADIAN Oveis ABEDINIA Noradin GHADIMI West Regional Electric Company-Electrical Transmission Department of Ilam Ilam 693 Iran Department of Electrical Engineering Ardabil Branch Islamic AzadUniversity Ardabil 045 Iran

This paper presents a novel modified inter- active honey bee mating optimization （IHBMO） base fuzzy stochastic long-term approach for determining optimum location and size of distributed energy resources （DERs）. The Monte Carlo simulation method is used to model the uncertainties associated with long-term load forecasting, A proper combination of several objectives is considered in the objective function. reduction of loss and power purchased from the electricity market, loss reduc- tion in peak load level and reduction in voltage deviation are considered simultaneously as the objective functions. First, these objectives are fuzzified and designed to be comparable with each other. Then, they are introduced into an IHBMO algorithm in order to obtain the solution which maximizes the value of integrated objective function. The output power orDERs is scheduled for each load level. An enhanced economic model is also proposed to justify investment on DER. An IEEE 30-bus radial distribution test system is used to illustrate the effectiveness of the proposed method.

关键词： component distributed energy resources,fuzzy optimization loss reduction interactive honey beemating optimization (IHBMO) voltage deviation reduction,stochastic programming

AC loss mitigation for high temperature superconducting coils in wireless power transfer

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Superconductivity 2023年第2期6卷 6-24页

作者： Hongyi Chen Hongye Zhang Research Center for Graph Computing Zhejiang LabHangzhouChina Department of Electrical and Electronic Engineering University of ManchesterManchester M139PLUnited Kingdom

With the rapid development of high temperature superconducting(HTS)technology,second generation(2G)HTS materials have become a promising alternative to traditional conductive materials in the power transmission ***,the topic of using HTS materials in wireless power transfer(WPT)systems for electric vehicles(EVs)has attracted widespread attention in the background of net zero *** virtually zero DC resistance and superior current‐carrying capacity,HTS materials can achieve high quality factor and power density in the WPT resonant circuits compared to conventional metals,e.g.,***,the optimal working frequency for the conventional WPT system is relatively high in the order of kilohertz *** coils working at high frequencies could generate high AC losses,reducing the overall power transfer efficiency(PTE)and increasing the cooling *** order to improve the PTE of HTS‐WPT systems,the AC loss mitigation methods for different HTS coil topologies have been investigated in this paper by varying the inter‐turn gap and tape *** HTS coil structures,namely the spiral coil,the solenoid coil and the double pancake(DP)coil,have been studied with a 2D axisymmetric multi‐layer numerical model based on the H‐formulation,and the simulation results have been validated by the published experimental *** general loss characteristics,loss distributions in each turn,as well as magnetic flux densities have been analysed in detail for three types of HTS ***,the impact of these two loss reduction methods on the WPT performance has also been *** have shown that increasing the inter‐turn gap and tape width can effectively reduce the AC power losses and increase the PTE of the HTS‐WPT *** spiral coil demonstrates the highest AC power loss reduction effect and PTE while maintaining a stable level of magnetic *** paper is believed to deepen the understanding of superconducting WPT and provi

关键词： Wireless Power Transfer(WPT) High temperature superconductor loss reduction Inter‐turn gap Tape width

Mitigation of Current Harmonic Using Adaptive Neural Network with Active Power Line Conditioner

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Mitigation of Current Harmonic Using Adaptive Neural Network...

Exploration and Practice of Precision Emission reduction Monitoring System in Air Pollution Prevention and Control in a District of Tianjin

CES/IEEE 5th International Power Electronics and Motion Control Conference

作者： M.R.Banaei S.H.Hosseini Electrical Engineering Faculty of Engineering Azarbaijan University of Tarbiat MoallemTabrizIran Tabriz University Faculty of Engineering Department of Electrical ＆Electronics EngineeringIran

＜正＞This paper deals with special active power line conditioner （APLC）, which is based, the same as UPQC, on integration of series and shunt power converters sharing a common DC link. In this paper the main purpose of the shunt inverter is to compensate the reactive power and current harmonics caused by nonlinear load. In addition, a simple structure feed forward neural network is presented for the separate of harmonic current components in nonlinear current load. It is known that loss reduction can be proposed in the parallel paths and also parallel transformers too. The aim of series power converter of APLC is to control power flow in order to reduce losses of distribution system, suggested APLC not only performs the functions of UPQC hut also can effectively reduce power losses in parallel paths. Simulation results, carried out by PSCAD/EMTDC, show that the proposed strategy using adaptive neural network can effectively reduce power losses and eliminate harmonic currents for sensitive nonlinear loads.

关键词： adaptive neural network APLC harmonic current loss reduction

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Meteorological and Environmental Research 2022年第1期13卷 67-69页

作者： Minglu FU Shuangxi SHEN Handan Tianhai Human Resources Co. Ltd.Handan 056107China School of Architecture and Art Hebei University of EngineeringHandan 056000China

At present,China’s atmospheric environmental protection work has achieved initial results,but environmental protection is facing increasing pressure,and the environmental situation is still not *** response to the call of the state,efforts have been intensified in environmental protection and ecological civilization construction,and supply-side structural reform has been actively promoted,and the Implementation Plan for Tianjin’s Comprehensive Discharge of Industrial Pollution Sources to Meet Standards has been *** the total amount of pollutants discharged in key areas far exceeds the environmental capacity,regional heavy pollution weather will still occur once adverse meteorological conditions are *** accordance with the Law of the People’s Republic of China on the Prevention and Control of Atmospheric Pollution,when the deterioration of air quality to a certain extent,to protect public health,key gas related industries should carry out emergency emission reduction in accordance with the local emergency plan while the local government starts the emergency response of heavy pollution *** economic loss of emergency response to heavy pollution weather is *** the basis of meeting the total amount of emissions required by the state,the project aims to achieve the effect of"emission reduction and production increase"by precise emission reduction according to local characteristics.

关键词： Pollution control of science and technology Air quality Accurate emission reduction loss reduction