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GONG Ruibang,JIANG Qi,WANG Yuchen,ZHANG Baoqing
Abstract: A novel voltage regulation and maximum power point tracking(MPPT)control for DC microgridcomposed of PV panel,battery,constant resistance and constant power loads was proposed. A dynamic model of the DC microgrid system described by a multi-input and multi-output nonlinear system with non-affine inputs was...
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Number of views:3330 Amount of downloads:1391
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ZHOU Jiabin,CHEN Yufe,GU Zhaoliang,YONG Jun,ZHAO Wenbin,JIANG Pengliang
Abstract: The influence of magnetic bias current on the excitation characteristics of near-field transformers inthe DC grounding electrode from bipolar to unipolar earth mode was discussed. Based on the principle of field-circuit coupling,the DC magnetic bias co-simulation model of transformer was established and an...
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Number of views:3334 Amount of downloads:1386
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FU Wenqi,HUANG Yongzhang,YANG Xin,GUAN Fei,GU Yujun
Abstract: The integration of large-scale renewable energy source causes the reduction of rotational inertia inpower systems. A motor-generator pair(MGP)can provide a real inertial response(IR)capability without delay forrenewable energy generations. The electrical-mechanical model of the MGP was established based on...
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Number of views:3264 Amount of downloads:1384
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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:3403 Amount of downloads:1381
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GAO Fengliang,HUANG Xiongfeng,FAN Hongxing,ZHANG Xuankun
Abstract: The failure rate of IGBT devices caused by excessively high temperature is as high as 55%.Improving the heat dissipation efficiency of the heat sink is the basis for ensuring the safe and reliable operation ofIGBT devices. Through theoretical analysis of IGBT module water cooling and heat dissipation,a tem...
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Number of views:3263 Amount of downloads:1370
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PANG Lin,LU Xin,WU Zhanxia,WANG Xueliang,FU Meiming,ZHANG Hongming
Abstract: Traditional virtual synchronous generator(VSG)is a primary frequency regulation technique. Afterload power changes,the frequency of microgrid cannot return to the rated level,influencing the safety of the microgrid in a severe condition. In order to avoid steady-state errors under large load fluctuations,a...
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Number of views:3411 Amount of downloads:1361
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MA Tianhui,MAWeiwei,GU Huaiguang,LIU Dong
Abstract: The modular multilevel converter(MMC)based high voltage direct current(HVDC)system(MMCHVDC)is an ideal solution for large-scale grid-connected and clustered offshore wind farms. But the interaction between the doubly fed induction generator(DFIG)and the MMC-HVDC system has a risk of subsynchronous oscillat...
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Number of views:3485 Amount of downloads:1361
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MA Xiaolu,WANG Zhixiong,DUAN Yanmin,ZHANG Lei,WU Yi,QI Zhuoya,HOU Jue
Abstract: The significance of promote high-efficiency motor and motor system in China was analyzed bymeans of literature research,questionnaire survey and enterprise survey. Policies and measures for the promotion of high-efficiency motors and motor systems were sorted out. Conduct market research on high-efficiency...
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Number of views:2454 Amount of downloads:1357
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HU Changsheng,LI Yang,SHAN Qiang,LIU Hui
Abstract: The fault-tolerant control of active power filter(APF)has component redundancy,which leads to the increase of fault-tolerant control error,the decrease of execution efficiency and fault-tolerant rate. Aiming at these problems,a fault-tolerant control method ofAPF based on component redundancy was proposed....
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Number of views:3250 Amount of downloads:1350
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SUN Lihua,ZHANG Lin,SUN Huiqin,GUO Yingjun,LI Zheng,GUO Tianliang
Abstract: The switched reluctance motor control system for electric vehicles includes motor drive and batterycharging circuit,which reduces system integration and power density. Based on the asymmetric half-bridge powerconverter of switched reluctance motor,an integrated power converter for electric vehicle was desi...
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Number of views:3269 Amount of downloads:1340
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CHEN Huabin,LIU Wei,XIANG Dening,CHEN Ying
Abstract: To control the induction motor stably under the condition of uncertain disturbances,an inductionmotor speed control method based on robust sliding mode control and field oriented control was proposed based on switching gain adaptive technology. By introducing the switch adaptive gain and integrator interpo...
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Number of views:3104 Amount of downloads:1339
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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:3029 Amount of downloads:1338
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HU Bo,YANG Chao,TIAN Xiaolei,LI Yunlu,YANG Junyou,CUI Jia
Abstract: When the internal parameters and topology of grid-connected power converter is unknown in somepractical applications,the existing frequency scanning based impedance modeling method can only maintain thedynamic equivalence at one operating point. To ensure the effectiveness of dynamic model in a wide operat...
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Number of views:3251 Amount of downloads:1337
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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:2778 Amount of downloads:1336
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LIU Sheng
Abstract: Voltage and current balance plays an important role in ensuring the normal operation of DC microgrid.Therefore,a new distributed voltage and current control method was proposed to realize the current sharingand voltage sharing regulation of DC micro-grid. The considered DC micro-grid was composed of severa...
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Number of views:3000 Amount of downloads:1328