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YANG Zhaowen,YANG Guochao,LIU Jianjun,WANG Hongwei,BAI Xinyu
Abstract: A second order filtering power dividing frequency control strategy based on virtual impedance wasproposed. The different frequency power compensation among different storage units by building invisible passfilters was achieved. The invisible pass filters including high pass filter and low pass filters were...
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Number of views:5771 Amount of downloads:10435
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PAN Guangxu,GONG Chiyu,LI Xingyu,HU Jun,LI Yingjie,WANG Ruiqi
Abstract: As an essential part of power system design and operation scheduling,electric load forecasting istroubled by strong randomness and low accuracy. Moreover,the application of advanced forecasting algorithms isassociated with data management system,while the traditional data management system is very inconven...
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Number of views:5768 Amount of downloads:11017
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DUAN Huiqin,HUANG Zhiyong,DU Shuping,YAN Tianbi,WEI Yongheng,WEI Hongxing,CHENG Zhuo
Abstract: Bidirectional DC-DC converter is the key equipment to realize the power balance of DC microgrid,and the accurate distribution of load current is one of the main objectives of multi converter parallel control. Aimingat the current sharing problem of bidirectional DC-DC converter,a current sharing control ba...
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Number of views:5766 Amount of downloads:10484
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LIU Mengmeng,LI Ruifang,MIAO Weili
Abstract: In order to optimize the controller structure of the permanent magnet synchronous motor(PMSM),a simplified speed control strategy for the PMSM based on genetic algorithm(GA)was proposed.The new controller mainly includes a direct voltage controller,which uses the motor model to achieve accurate speed track...
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Number of views:5763 Amount of downloads:8191
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ZHAO Jianyong,ZHANG Zhenxiao,DING Yuanjie,YU Ziwei,HAN Junyao, WANG Shenghong,NIAN Heng,LI Xuerong
Abstract: Aiming at the problems of small regulation range and slow speed of traditional voltage regulators such as compensation capacitors in distribution network line voltage compensation,a voltage compensation scheme of distribution network in sparse area was proposed,the voltage hierarchical coordinated control ...
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Number of views:5756 Amount of downloads:9488
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REN Hao,QIU Xiaoyan,ZHANG Zhirong,SUN Xu,ZHANG Mingke
Abstract: With the development of electric vehicle(EV),there are a large number of EV charging load in thepower grid. Because of its unique advantages,AC/DC microgrid is more convenient for the access of AC slowcharging pile and DC fast charging pile. However,large-scale EVs integration will bring impact to the powe...
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Number of views:5737 Amount of downloads:9023
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PAN Ling,FENG Qian,ZHANG Peng,SHEN Bing,ZHOU Jian,CHEN Ran,ZHAO Jinshuai
Abstract: Due to the high cable ratio of city grid,the harmonic pollution is aggravated. For the buses with high harmonic voltage content,it is necessary to evaluate the harmonic emission level of the utility side and customer side. Most of the existing evaluation methods are based on two assumptions:1)the harmonic ...
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Number of views:5736 Amount of downloads:8570
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GU Ming,XING Meng,GE Xianjun
Abstract: Aiming at the complex problem of weight factors tuning when the induction motor driving systemadopts the finite set model predictive control,an optimal finite set model predictive controller without weightdistribution for induction motor driving system was designed. In the new scheme,the form of sequential...
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Number of views:5728 Amount of downloads:8853
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NIU Qian,ZHANG Dong,WANG Junlong
Abstract: Aiming at the problems of uneven power distribution and poor stability of grid AC/DC microgrid,anew adaptive coordinated control strategy was proposed to improve the stability and power distribution accuracy ofAC/DC microgrid(MGs)system.First,for converters connectingAC microgrids and DC microgrids,a contr...
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Number of views:5709 Amount of downloads:9492
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LU Yibing,LI Feng,ZHAO Wenbin,LU Wu,HUO Simin
Abstract: A power angle control method for DC system with doubly-fed induction generator based on air gapflux vector regulation was presented,which could reveal the relationship between the air gap EMF vector angle andthe stator output power,and could be used to directly control the stator output power. In the propos...
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Number of views:5703 Amount of downloads:9309
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FU Yu,LI Tie
Abstract: The microgrid is essentially an active distribution network,which is a combination of the distributed generation(DG)system and different loads at the distribution network voltage level. By analyzing factors such as safety and reliability,energy conservation and environmental protection in the microgrid,and...
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Number of views:5692 Amount of downloads:9612
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LU Hai,ZHANG Xudong,DANG Junpeng,GUO Li,LIU Rui
Abstract: A 2-stage three-level power conversion system(PCS)was studied,in which the 3-level T-type 3-leg3-phase 4-wire(3LT23L3P4W)topology was adopted as AC/DC part while the 3-level Buck/Boost topology wasutilized as DC/DC interface. To address the neutral point potential(NPP)unbalance of the PCS,firstly,with thea...
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Number of views:5691 Amount of downloads:9291
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CHEN Lu,WANG Can,HU Hao,ZHOUYANG Junran,YANG Wentao,MA Xin
Abstract: With the increasing utilization rate of electric vehicles(EVs)in China,high permeability EVs makethe three-phase imbalance rate of urban distribution network increase day by day,which causes problems such asvoltage fluctuation and network loss increase,and the distribution network with high three-phase imb...
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Number of views:5680 Amount of downloads:11226
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TANG Jiayuan,ZHAO Wenbin,LU Wu,GAO Yuan
Abstract: Under the electric power market environment,the key to achieve the joint operation of virtual powerplants lies in the profit distribution among the internal multi-subjects. To solve the impact of the final profitdistribution,which is caused by the uncertainty of the clean energy output of each main body in...
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Number of views:5664 Amount of downloads:9391
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TAN Xiaomeng,LIU Jichun
Abstract: New energy with intermittent and uncertainty would seriously impact the operation reliability,especially in isolated multi-energy complementary generation system,and make the system face certain risks. Thus,reasonable system reserve is the key to avoid large risk loss in isolated island power system under ...
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Number of views:5658 Amount of downloads:9324