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TANG Junyi,DONG Xuetao,QIN Yanhui
Abstract: The large-scale grid connection of renewable energy with strong randomness and volatility and thenet load fluctuation caused by time sequence put forward higher requirements for the operation flexibility of powersystem. In order to quantitatively evaluate the operation flexibility capacity of power system,...
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Number of views:947 Amount of downloads:755
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LIU Xinglong,XIE Yihan,YANG Ziyang,ZHANG Zhilong,YI Hao,ZHUO Fang
Abstract:Active power filters(APF)are widely used for dynamic compensation of power system harmonic.However,under weak grid conditions,the interaction between APF,nonlinear loads and grid impedance can easily lead to the stability issue of harmonic oscillation around the compensation frequency,resulting in the fault...
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Number of views:1061 Amount of downloads:753
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ZHOU Yufan,GAO Hui,LONG Yi
Abstract:To cope with the impact of electric vehicle(EV)charging loads on the power grid and achieve abalance of interests between the power grid,charging station and users,a customized charging strategy for EVs that takes dynamic electricity prices into consideration was proposed. Initially,the dynamic pricing mech...
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Number of views:1287 Amount of downloads:744
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LIU Zhijian,ZI Chao,LI Pengcheng,GUO Cheng,LIU Jie,HUANG Wei
Abstract: Aiming at ultra-low frequency oscillation in power system caused by hydraulic turbine governingsystem,an additional damping control strategy for governing side was developed. Firstly,according to the damping torque method,the negative damping generated by the hydraulic turbine governing system was regarded...
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Number of views:971 Amount of downloads:743
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ZHANG Di,HUANG Lu,CUI Jing,SONG Zhiwei
Abstract: The AC voltage sensors are used to measure the grid voltage,which brings high hardware cost,difficult installation and low reliability. In order to realize that grid voltage sensors are not necessary,virtual fluxwas introducted to model prediction power control algorithm for cascaded H-bridge rectifier. Th...
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Number of views:948 Amount of downloads:743
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JIAO Jinghai,LI Jie
Abstract: To solve the problem of low identification accuracy of partial discharge(PD)for electric multipleunits ethylene propylene rubber(EPR)cable terminal defects,an on-board cable terminal defect identificationmethod based on improved residual network was proposed. Firstly,cable terminals with four typical insul...
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Number of views:928 Amount of downloads:741
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PENGTao
Abstract: The local leakage signal of high-voltage insulation equipment is weak and its characteristics are notobvious,which can only explain whether there is discharge. There is a phenomenon of missing judgment andmisjudgment in the actual positioning process,which is difficult to accurately locate the high-voltage...
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Number of views:1125 Amount of downloads:741
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GU Jiming,SONG Yunting,LIU Xinyu,ZHU Shaoxuan,LEI Yu,ZHANG Tongzun
Abstract:Under the dual carbon background of AC and DC hybrid power grids have the new feature of"strong HVDC and weak AC system" and power electronization,in order to effectively reduce the risk of largescalepower outages in power grid,it is necessary to build a secure and reliable comprehensive defense system toen...
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Number of views:1045 Amount of downloads:735
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WU Jiawei
Abstract:Electrically assisted manufacturing(EAM)is a promising and rapidly developing metal processingmethod.The power supply is a key sub-system for EAM,which needs to be designed properly. the model-baseddesign of a low-voltage high-current pulse power supply used for EAM was proposed based on converter-levelelec...
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Number of views:926 Amount of downloads:732
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JING Qi,WANG Changkai,XU Fengxia,YU Liqi
Abstract: In high-precision applications,the control accuracy of the servo system is extremely high required.The control precision of the servo system depends largely on the precision of the feedback measurement. Positionand speed feedback accuracy can be improved by increasing the absolute accuracy of the encoder,a...
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Number of views:1015 Amount of downloads:732
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LIANG Zhen,WANG Yong,BAI Haibin,ZHANG Zhiyu,SUN Qianhao,CUI Bin
Abstract: Based on full-bridge(FB)and half-bridge(HB)sub-modules(SMs),the conventional hybridmodular multievel converter(MMC)is a typical topology of MMC with DC fault clearing ability. However,theproportion of FB SMs in conventional hybrid MMC is usually greater than 50%,so as to increase the cost andlosses. To sol...
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Number of views:715 Amount of downloads:728
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LI Lingqi,CHENG Zhijiang,GUO Shaokang,XIAO Shihao ,CHEN Xingzhi
Abstract: Aiming at the problem of wind abandonment caused by the contradiction between wind and heatduring the winter heating in the Three-north areas of China,a scheduling strategy for electric heating combinedsystem considering wind power consumption was proposed. Firstly,the "power determined by heat" constraint...
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Number of views:750 Amount of downloads:723
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LIU Dong
Abstract: Focus on the stator winding insulation and voltage oscillation of variable frequency motor,thetransition process of the pulse voltage output by the frequency converter in the transmission path of stator windings,frequency conversion cables,reactors,etc was analyzed,the voltage equivalent mathematical model...
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Number of views:839 Amount of downloads:722
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FU Chen,FEI Fei,WANG Jianjun,GUO Mingxing,LIN Shunfu,ZHANG Qi
Abstract:Making full use of the regulation of flexible resources can effectively suppress the fluctuation ofrenewable energy generation and ensure the economic and safe operation of power system. An optimal dispatchingmethod for power system considering the flexibility of battery energy storage systems(BESS)and pump...
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Number of views:1048 Amount of downloads:721
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JIANG Wenhui,LIN Dong,YU Li,CHEN Bo,CHEN Yumin
Abstract: The voltage stability of power grid was briefly introduced,and the measurement method of voltagestability of phasor measurement unit(PMU)based on state estimation was proposed. This method mainly aims atthe voltage change caused by the load rate change. The voltage stability under different load conditions...
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Number of views:754 Amount of downloads:720