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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：121 Amount of downloads：101
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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：97 Amount of downloads：116
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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：310 Amount of downloads：212
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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：441 Amount of downloads：308
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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：539 Amount of downloads：268
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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：278 Amount of downloads：182
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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：443 Amount of downloads：412
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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：426 Amount of downloads：376
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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：462 Amount of downloads：408
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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：428 Amount of downloads：413
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LI Haoyuan，CHEN Guowei，LI Guanjun，WEI Lingfeng，LIN Da，WANG Xiangjin
Abstract：With the emergence of a large number of distributed power generations，various unbalanced andnonlinear loads are connected to the power grid，resulting in the distortion of the grid current，which brings adverse effects to both the power grid and electrical equipment. A multifunctional energy storage converter...
更多Number of views：427 Amount of downloads：471
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YANG Zhaohui，WEI Huadong，HE Liuqing，ZHANG Hao，PENG Guoping，SHI Ben
Abstract：Aiming at the problem of large switching loss of modular multilevel converter（MMC），startingfrom the switching frequency optimization strategy，the existing switching frequency optimization strategy wasimproved，and the accurate analytical formula of sub-module capacitor voltage based on the real-time value of...
更多Number of views：391 Amount of downloads：418
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DING Chaohui，YAO Fei，JANG Jun,GAO Ang，SHAO Gao
Abstract：The traditional predictive current control for three-phase LCL grid connected inverters has theproblems of large steady-state ripple and unstable switching frequency，which is not conducive to the quality of grid connected current and the design of filters. Therefore，an improved three vector fixed frequency ...
更多Number of views：398 Amount of downloads：455
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SI Dajun，WANG Jie，SHU Banggui，ZHANG Guangbin，SHU Hongchun
Abstract：The load of a submerged arc furnace has many advantages，such as large single-unit regulationcapacity，good communication conditions，easy control，and low economic retrofitting，making it an importantflexible regulation resource for the power grid. However，there is currently a lack of effective digital simulati...
更多Number of views：420 Amount of downloads：430
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CHEN Biao，HAN Zhongxiu，MA Liqiang，ZHANG Renhe
Abstract：The back-to-back active neutral-point-clamped（ANPC）converter，as the core component of theunified power flow controller of the distribution network，is widely used for the flexible closed-loop operation.However，the ANPC converter has more switching devices and commutation paths，which significantly increasesth...
更多Number of views：445 Amount of downloads：406
