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FENG Xiang,YU Yue,LI Cheng,ZHENG Wei,LIU Jianhua
Abstract:The traditional ultra high speed permanent magnet synchronous motor(PMSM)driver uses PWMequivalent sine voltage output,which leads to severe motor heating due to large harmonics,and it cannot be used in situations where the input voltage changes over a large range,such as fuel cells. To reduce the heat gene...
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Number of views:1784 Amount of downloads:6201
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RUAN Bo,YI Bonian,YE Xuecheng,LE Jian,LANG Hongke,REN Yi
Abstract:The electricity power price setting mechanism will be fundamentally reformed with the continuousadvancement of a new round of electricity market-oriented reform. Presently,some provincial and regional powergrid enterprises are facing the problem of large fluctuations in electricity prices,which is not condu...
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Number of views:1783 Amount of downloads:5720
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LIU Qiwei,ZENG Jiang
Abstract:In view of the need to test the operation of power electronic equipment under various workingconditions in the current new power system,a control strategy using linear auto-disturbance rejection technologywas proposed to study the power grid simulator with line impedance simulation function. On this basis,i...
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Number of views:1776 Amount of downloads:7082
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SUN Heyu,JI Baowei,WEI Yushan,FANG Weihan,WANG Yangyang
Abstract:In response to the problem of slow response speed of main steam pressure in the coordinated controlsystem of thermal power units,the control effect of the coordinated control system was improved by blowing outsome of the stored powder in the pulverizing system. Based on the traditional milling system model,...
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Number of views:1774 Amount of downloads:4960
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ZHANG Jianwen,MA Haixiao,JIAN Jiahong,LIU Yueneng
Abstract:To eliminate the leakage current of single-phase non-isolated photovoltaic inverter,a six-switchphotovoltaic inverter topology with low leakage current was proposed. The topology consists of a voltage multipliercircuit,a common ground three-level inverter circuit and a LC output filter circuit. The combinat...
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Number of views:1773 Amount of downloads:10529
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BU Xianshuai,HE Shan
Abstract:In order to improve the accuracy and stability of short-term wind direction prediction,a winddirection prediction method based on lidar wind data and an improved nonlinear echo state network(NESN)model was proposed.First of all,wind direction data 100 meters ahead of the wind turbine was obtained by laser w...
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Number of views:1772 Amount of downloads:5730
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JIN Dan,ZHI Jing,XIN Shijin,YANG Jian,HUANG Yafei,XU Qing
Abstract:Voltage source converter(VSC)connected to weak AC power grid has the risk of small disturbanceinstability. Under the traditional control strategy,VSC has to reduce output power to maintain stable operation. Inorder to improve the stability of the weak grid connected VSC system,first established a universal ...
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Number of views:1771 Amount of downloads:6342
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CHEN Chen,DONG Pingxian,SONG Xiaofan,GUO Fang,QI Huanruo,DU Xiaotong
Abstract:After the distributed wind farm stations are integrated into the distribution network,due to thecharacteristics of wind farm short-circuit current amplitude control and frequency offset,the traditional three-stagecurrent protection of distribution network is difficult to accurately identify the fault on the...
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Number of views:1770 Amount of downloads:5303
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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:1769 Amount of downloads:6388
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SUN Tao,WANG Tao
Abstract: The semi-bridgeless dual Boost power factor correction(PFC)circuit can obtain higher conversionefficiency without increasing common mode noise,but the return current of the input AC terminal producesadditional losses on the introduced diodes,which reduces the conversion efficiency. The replacement of diode...
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Number of views:1765 Amount of downloads:6406
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FAN Yuanliang,ZHU Junwei,WU Han,HAN Xiaolan,HUANG Xinghua,CHEN Jinyu
Abstract:Accurately estimating the state of health(SOH)of lithium-ion batteries is crucial for optimizingenergy storage systems' operation,management,and maintenance. Existing methods that extract health featuresfrom single-stage charging data fail to exploit battery aging information fully,leading to a suboptim...
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Number of views:1764 Amount of downloads:6122
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JIANG Xuejiao,ZHANG Changqing,QIN Gang,ZHONG Lei,ZHOU Chaojun,CHEN Yupei
Abstract:In order to balance the output difference between renewable energy and load in the activedistribution network and reduce the budget cost and user purchase cost,an optimal dispatching method ofdistributed generation units in the active distribution network based on power demand side response was proposed.On ...
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Number of views:1764 Amount of downloads:4830
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MA Zun,CHEN Haoying,DENG Can,CHEN Yong,GUAN Lin
Abstract:The development of modern power systems with wide span,low inertia,and complex structuremakes the frequency stability problem increasingly prominent,and the spatial-temporal distribution characteristicsof frequency are distinct. Taking the actual power grid as the object,the impacts of large-scale new energ...
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Number of views:1762 Amount of downloads:6130
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WEI Xin,LI Yubo,ZHANG Yun
Abstract:Currently,the optimal modulation strategies for SS resonant networks under different operatingconditions have not been fully explored. Therefore,the optimal modulation strategy of SS resonant network wasinvestigated in low-power situations to improve the transmission efficiency and charging stability of the...
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Number of views:1758 Amount of downloads:9460
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QIN Gang,ZHANG Changqing,JIANG Xuejiao,ZHONG Lei,ZHOU Chaojun,WU Min
Abstract:During the operation of high-voltage DC power grid,due to factors such as load characteristics andvoltage fluctuations,the instantaneous power characteristics such as capacitor current and harmonics are morecomplex,which increases the difficulty of identifying faults in the power grid system. Therefore,a bi...
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Number of views:1754 Amount of downloads:4765