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TANG Junyi，DING Biwei，YANG Qi
Abstract: The integration of high proportion of wind power intensifies the uncertainty of power systemoperation. The sufficient flexibility is vital for the safe and reliable operation of the power system. An evaluationmethod of power system flexibility considering wind power prediction interval was proposed. First，...
更多Number of views：845 Amount of downloads：676
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SUN Zhenqin，QU Jianhua，ZHANG Zhenzhen，QUAN Xiao，LI Hongbin，TAN Peng
Abstract: In order to improve the measurement accuracy of the position and speed closed-loop of the brushlessDC motor，which is currently used in the attitude control actuator，a new cumulative pulse M/T method wasproposed，based on incremental off-axis magnetic encoder（AS5304A）and TMS570 chip internal integratedenhance...
更多Number of views：845 Amount of downloads：839
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FAN Enze，LI Yaohua，GE Qiongxuan，ZHAO Lu
Abstract：Under digital control，the inner current loop of the LC-type inverter is affected by the control delay，which leads to the weakening of its active damping effect. Increasing the sampling control frequency can effectivelyreduce the negative influence of digital control delay. Furthermore，in order to suppress t...
更多Number of views：842 Amount of downloads：543
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JIA Pengfei，HE Yongpeng，YANG Jianxin，ZHANG Qing，WU Wenda
Abstract：Industrial communication technology is an effective way to achieve network control of industrialequipment. With the development of Ethernet technology in recent years，a top layer application technology basedon Ethernet，PROFINET has rapidly developed. However，due to the lack of high-speed network interfaces ...
更多Number of views：841 Amount of downloads：803
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GUO Jiahao，YANG Xiong，FANG Xin，GUAN Jiamin
Abstract: The secondary voltage signal output by electronic capacitive voltage transformer in the primary andsecondary fusion equipment is very weak，which is easy to be interfered by high-order harmonics，resulting inunstable signal transmission. In order to solve these problems，a high-order and high-precision filter...
更多Number of views：840 Amount of downloads：579
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YIN Xiang，ZHANG Xiaojun，FENG Xinjia，CHENG Shi，TAO Yuxin，XIAYuande
Abstract：As the penetration rate of new energy and power electronic equipment increases，the inertia anddamping of the power system decrease，and the stability decreases.The grid-forming control technology builds avoltage source to support the stable operation of the large power grid through the converter，so as to pla...
更多Number of views：838 Amount of downloads：711
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YANGYifan，YIN Han，LU Zhiye，YU Xueying
Abstract: In order to solve the problems of large volume and short service life of the traditional electrolyticcapacitor frequency converter，the thin film capacitor was used to replace the electrolytic capacitor to constitute theAC-DC-AC frequency converter without electrolytic capacitor. Aiming at the problem of bu...
更多Number of views：838 Amount of downloads：936
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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...
更多Number of views：836 Amount of downloads：567
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WANG Huahan，ZHAO Shiwei
Abstract：A dual active bridge（DAB）DC-DC converter voltage control strategy based on double-integralsliding mode control was proposed，which can obtain good control effect under the condition that the modelaccuracy requirements are low and the controller design process is simple. Firstly，the reduced-order model of the...
更多Number of views：830 Amount of downloads：800
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XU Binbin，CHEN Chang，ZHANG Aoyu，WANG Yongqiang
Abstract: In order to study the distribution of magnetic field and temperature field of dry-type transformeriron core more accurately，analyze the influence of different excitation on the magnetic field loss and hot spottemperature rise of dry-type transformer core，firstly，Maxwell was used to calculate the transient ...
更多Number of views：826 Amount of downloads：1160
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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...
更多Number of views：825 Amount of downloads：611
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YAN Yulin，XIAYankun，LIU Liyou
Abstract: In order to achieve equal current, a constant current source should be used to drive the LEDs. Aconstant current source based on two output Cuk improved circuits was proposed. The circuit structure, workingmode and constant current principle were analyzed, and the voltage, current and power expressions wer...
更多Number of views：825 Amount of downloads：746
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ZOU Jia，ZHANG Jianqiao，JI Chengchun
Abstract: Aiming at the problem that the accuracy of the speed estimation of the traditional model referenceadaptive system（MRAS）method without speed sensor decreases after the speed load mutation in the low speedrange，a speed identification method based on the combination of back propagation（BP）double-layer artific...
更多Number of views：824 Amount of downloads：716
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YANG Tianxiang，CHENG Zhijiang，YANG Handi，TIAN Feng
Abstract: Aiming at the demand of intelligent coal mine and exit problem of underground coal mine powernetwork，an energy storage hybrid distribution transformer based on modular multilevel converter（MMC-HDT）was proposed. Firstly，the proposed energy storage MMC-HDT was modeled and four operation modes were givenconsi...
更多Number of views：815 Amount of downloads：937
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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...
更多Number of views：813 Amount of downloads：623
