Power electronics
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ZHAO Weicheng，MA Haoyuan，HUANG Jinming，CAO Xin，KE Xingsi
Abstract：Voltage source converter（VSC）working as the interface of new energy stations connects to urbanmain network with long-distance AC line，which results a weak grid connected condition and has a risk of DCvoltage instability. To analyze the mechanism of DC voltage instability of weak grid connected VSC，a DC volt...
更多Number of views：281 Amount of downloads：985
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FENG Kan，ZHANG Lezhen，ZHOU Long，HOU Yanlun，NIU Wei，BAO Chengjia
Abstract：An improved virtual impedance strategy with adaptive reactive power equalisation and bus voltagecompensation functions was proposed to address the reactive power equalisation and bus voltage drop issues inparallel inverters in island microgrids. By introducing an enhanced power decoupling strategy based on ...
更多Number of views：318 Amount of downloads：964
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GUO Yanhui，LI Hao，LUO Min，CHEN Jie
Abstract：In power electronic devices，the supporting capacitor is a crucial component. To ensure the safety ofthe system，monitoring the status of the capacitor is particularly important. A neural network approach wasemployed，and analyzing the correlation between control strategies and circuit topology parameters to d...
更多Number of views：382 Amount of downloads：1500
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LI Mingbo，SUN Zhiyuan，ZHENG Kun，LIU Mosi，GAO Like
Abstract：With the increasing scale of new energy power generation and the continuous reduction of lithiumbattery cost，energy storage technology has gradually become an important supporting technology to achieve thegoal of "double carbon". However，the state of charge（SOC）of the energy storage system is too high or to...
更多Number of views：393 Amount of downloads：1399
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YOU Hanwen，CHEN Xi
Abstract：A modeling method based on fractional calculus was proposed to analyze the working mode of halfbridge LLC resonant converters and the influence of the "parameter drift" of the resonant capacitor on the workingmode of the converters. Then，based on the Oustaloup's filtering algorithm，a simulation model of...
更多Number of views：402 Amount of downloads：1549
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YANG Xuan，LI Rui，CAO Xiaoqing，LI Lin，GUO Ran
Abstract：During the transition of a microgrid inverter from grid-connected mode to islanded mode and viceversa，pre-synchronization measures are necessary under the virtual synchronous generator （VSG） controlarchitecture to prevent voltage waveform distortion and current surges. A VSG-based parameter-optimized presyn...
更多Number of views：636 Amount of downloads：1352
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YANG Yong，ZHANG Xujun，LIU Wenfei，NIU Haoming，ZHAO Jinguo，YANG Rui
Abstract：The integration of new energy units on a large scale has introduced numerous adverse effects on thestability of system operation. Analysis of mechanisms and identification of impedance characteristics in gridconnected inverter（GCI）for new energy units are key to effectively addressing these issues. Therefor...
更多Number of views：522 Amount of downloads：3299
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SHI Mingming，LIU Ruihuang，WANG Xinda，WANG Jiaming，ZHANG Chenyu
Abstract：To address the parameter dependency issues present in traditional model predictive controlalgorithms，a novel model predictive control method that employed an ultra-local model and updated its parameters in real-time using the recursive least squares （RLS）method was proposed. This approach eliminated the dep...
更多Number of views：614 Amount of downloads：1053
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WANG Yihan，FENG Chuanxin，JIN Tao
Abstract：To solve the problem of neutral point voltage imbalance when the three-level neutral point clamped（NPC）inverter works，an improved neutral balance model predictive control（INB-MPC）algorithm was proposed.The proposed method used a two-stage voltage vector selection method with no weighting factors，deleted the...
更多Number of views：692 Amount of downloads：916
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QU Chenming，GUO Kunli，BAI Yang，LI Hang，ZHU Tinghua，MA Peng
Abstract：Considering the influence of grid voltage background harmonics in weak current networks，reverseharmonic peaks appear in the grid-connected current under weighted average current control（WACC），making itimpossible for the system to achieve zero pole cancellation and thus affecting the stability of the grid-co...
更多Number of views：747 Amount of downloads：785
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CAO Dayou，LÜ Junmu，BAI Yansong，LI Guorong，ZHOU Yan
Abstract：In order to reduce the carbon emissions of large ships，photovoltaic（PV）power generationtechnology began to be applied to ship power systems. However，due to the limited capacity，low inertia and largeload difference of the ship power system，the traditional virtual synchronous generator（VSG）control strategy ca...
更多Number of views：514 Amount of downloads：872
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ZOU Yingdong，WANG Fengjun，ZHOU Yu
Abstract：This research focused on the separation and calculation of electromagnetic losses in semi-directdrived permanent magnet wind generators（SDDPMWG）. Firstly，analytical method for calculating core loss ofmotor considering harmonic current was derived based on the Bertotti method. The eddy current loss of perman...
更多Number of views：705 Amount of downloads：916
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SUN Chuanjie，TIAN Kai，XU Wenyuan，LU Beibei，LI Nan
Abstract：A brake unit based on IGCT was designed for different applications of frequency converter inindustrial scenes，especially the medium voltage frequency conversion system without feedback function. IGCTwas used as the main power device，and the parameters and characteristics of IGCT was analyzed. According to t...
更多Number of views：662 Amount of downloads：1068
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GU Laiqiang
Abstract：The traditional three-phase pulse width modulation（PWM）rectifier requires six power switches.Due to the shoot-through problem between two switches on the same bridge arm，the control difficulty is increasedand overall system design becomes more complicated. A half-controlled three-phase PWM rectifier topolog...
更多Number of views：732 Amount of downloads：1051
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ZHAO Yifu，ZHANG Guangbin
Abstract：In response to the existing problems of traditional diode based clamp type wind turbine inverters，ahybrid clamp type structure was introduced. Based on the analysis of its working principle，a method for switchingthe switch state and a vector optimization selection method that can avoid modulation waveform b...
更多Number of views：702 Amount of downloads：1119
