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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:3267 Amount of downloads:1274
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CUI Qian,ZHOU Jiemin,DING Zhengdao,QIN Jina,GAO Yiqing,JIANG Pengchuan
Abstract:In order to solve the problem of overvoltage and overcurrent in the process of load sudden changefor ion thruster screen grid power supply,the phase shift pulse frequency modulation(PS-PFM)was used tostabilize the output voltage of the LLC resonant converter. When the sampling voltage is lower than the lowe...
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Number of views:282 Amount of downloads:1267
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CHEN Zhixiu,LIU Yang,ZHANG Hanshu,XIAYe,WANG Hao,LIU Xin
Abstract: In the period of high and new technology development,the application of SiC and other newsemiconductors promotes the development of PCB design toward integration and high efficiency. The new ideas were provided for PCB design optimization from two aspects of high frequency and high density. Among them,ther...
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Number of views:3151 Amount of downloads:1264
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LIU Tao,CAI Xu,SUN Guoqi,WEI Xiaobin,CAO Yunfeng,ZHANG Lingyan
Abstract: As traditional condenser is replaced by static var generator(SVG),the dynamic reactive powercompensation can be provided by SVG. However,compared with traditional condenser,SVG lacks rotational inertia.Traditional research of SVG mainly focused on reactive power compensation and fault ride-through,and ther...
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Number of views:3122 Amount of downloads:1263
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LI Qi,CHEN Yihua,GUO Bin,ZHANG Deliang,GUO Shaoqing
Abstract: In order to solve the contradiction between the maximum consumption of new energy and thereserved power flow margin of operation section,a day-ahead coordination optimization method for complexcascaded power grid based on key section identification was proposed to achieve the orderly coordination among the...
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Number of views:2998 Amount of downloads:1259
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LIU Xiaodong,SUN Lunan,LIU Yawei,GUAN Peng,RONG Xifeng
Abstract: In order to meet the needs of the testing laboratory's task scheduling and process design functions,the new applications were developed based on the existing laboratory information management system,such asscheduling system and process designer. According to the type and priority of the test task,the t...
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Number of views:3287 Amount of downloads:1258
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LI Zhenbo,DAI Linwang,LI Shaolin,ZHANG Xueguang
Abstract: At present the mainstream of doubly-fed induction generators(DFIG)control mode is the currentsource type vector control mode,which is lack of independent of frequency and voltage support ability,but the voltage source type virtual synchronous machine control method can solve the shortcomings. In order to m...
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Number of views:1914 Amount of downloads:1256
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LI Dexiang,LU Jiayu,GE Wenqing,LI Bo,TAN Cao
Abstract: Aiming at the problems of high control performance and long design cycle of electromagnetic linearactuator control parameters,a multi-objective optimization design method of control parameters was proposed.Based on electromagnetic linear actuator system,a robust controller was designed. The controller para...
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Number of views:3246 Amount of downloads:1254
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XU Rui,PAN Sanbo
Abstract: Aiming at the problem that the application of multi-step model predictive control(MPC)to invertercontrol results in a doubling of the number of solutions to lead to computational difficulties,an MPC strategy basedon the improved spherical decoding algorithm was introduced. In the control strategy,the optim...
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Number of views:3422 Amount of downloads:1253
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LIN Xin,GAO Xiang,XIE Zhen,XU Kebao,ZHANG Xing
Abstract: With the increasing proportion of wind turbines,the characteristics of low inertia and weak dampingpower grid become more obvious,which brings new challenges to the smooth operation of power grid. Traditionalcurrent-controlled strategy is difficult to obtain accurate grid synchronization information in wea...
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Number of views:2096 Amount of downloads:1244
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ZHANG Tingting,ZHAO Jinbin,DENG Ping,QU Keqing,ZHANG Junwei
Abstract: Aiming at the problems of low input voltage and high demand on driving voltage frequency andamplitude of the traffic sign power supply using smart electroluminescent(S.E.L)technology,a high rise ratio highfrequency inverter drive circuit based on the cascade connection of the Boost circuit with soft switch...
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Number of views:2978 Amount of downloads:1244
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ZHANG Lantao,XIONG Jun,NIU Xiaonan,HUANG Xiaoyu
Abstract: Aiming at the reliability problem of high-power IGBT modules under short circuit extreme operatingconditions,the power terminals imbalanced current of IGBT modules and the resulting dynamic junctiontemperature change were comprehensively analyzed. Firstly,the current sharing characteristics of parallel ter...
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Number of views:3331 Amount of downloads:1244
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JIA Junqing,LÜ Chao,LIU Dinghua,XU Hao
Abstract: With the rapid development of artificial intelligence algorithms,convolutional neural networks withfewer layers have been used in distribution network overvoltage recognition. The deep-level network has a higherrecognition rate,but requires a large number of data samples. At present,the amount of data in t...
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Number of views:3144 Amount of downloads:1244
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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:3059 Amount of downloads:1243
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JIN Yongchun,CHEN Li,ZOU Yusheng,DUAN Chengwu,YAO Jian
Abstract: Due to the advantages of high efficiency,wide speed range,high torque density and great controlperformance,permanent magnet synchronous motors(PMSM)have been widely used in driving systems of electric vehicles(EVs). However,as the increase of power density,the problem of temperature rise caused by loss hea...
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Number of views:1899 Amount of downloads:1242