Power electronics
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ZHAO Jianyong，LI Han，WU Min，MA Runsheng，ZHAO Wenqiang，YU Ziwei
Abstract: Firstly，the significance of impedance modeling for new energy power generation equipment wasanalyzed，and the existing impedance modeling methods were explained. Aiming at the problems of low flexiblematching degree，single disturbance signal，fixed disturbance frequency and the inability of real-time measure...
更多Number of views：3808 Amount of downloads：1785
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NIU Qian，ZHANG Dong，WANG Junlong
Abstract: Aiming at the problems of uneven power distribution and poor stability of grid AC/DC microgrid，anew adaptive coordinated control strategy was proposed to improve the stability and power distribution accuracy ofAC/DC microgrid（MGs）system.First，for converters connectingAC microgrids and DC microgrids，a contr...
更多Number of views：3865 Amount of downloads：1587
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ZHOU Jiabin，CHEN Yufe，GU Zhaoliang，YONG Jun，ZHAO Wenbin，JIANG Pengliang
Abstract: The influence of magnetic bias current on the excitation characteristics of near-field transformers inthe DC grounding electrode from bipolar to unipolar earth mode was discussed. Based on the principle of field-circuit coupling，the DC magnetic bias co-simulation model of transformer was established and an...
更多Number of views：3762 Amount of downloads：1675
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ZHANG Yang，GAO Tian，LIN Weixing
Abstract: Photovoltaic inverter，charging pile，energy storage converter，wind power converter and othercommon power electronic equipment are three-phase high frequency AC/DC/DC converter，which is widely used inindustrial and civil fields. Due to the fast switching capability of three-phase high frequency converter，its...
更多Number of views：3955 Amount of downloads：1546
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MA Tianhui，MAWeiwei，GU Huaiguang，LIU Dong
Abstract: The modular multilevel converter（MMC）based high voltage direct current（HVDC）system（MMCHVDC）is an ideal solution for large-scale grid-connected and clustered offshore wind farms. But the interaction between the doubly fed induction generator（DFIG）and the MMC-HVDC system has a risk of subsynchronous oscillat...
更多Number of views：3958 Amount of downloads：1678
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LU Hai，ZHANG Xudong，DANG Junpeng，GUO Li，LIU Rui
Abstract: A 2-stage three-level power conversion system（PCS）was studied，in which the 3-level T-type 3-leg3-phase 4-wire（3LT23L3P4W）topology was adopted as AC/DC part while the 3-level Buck/Boost topology wasutilized as DC/DC interface. To address the neutral point potential（NPP）unbalance of the PCS，firstly，with thea...
更多Number of views：3500 Amount of downloads：1479
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FU Xuhui，FANG Chun'en，XUE Tao，HUANG Leichao，CHEN Junping
Abstract: In order to ensure that the thyristor valve body can be accurately conducted during the solid state switch switching，a solid state switch trigger control unit was designed. Firstly，the structure and working principle of the solid state switch and the structure and function of the trigger control unit were ...
更多Number of views：3767 Amount of downloads：1546
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YIN Aihui，REN Ang，WU Xiaowen，HOU Jianfeng，FAN Yulin
Abstract: When fast voltage control is used in a power factor corrector（PFC），ripples on the DC side can cause grid current harmonics. To solve this problem，a novel DC voltage nonlinear PI control strategy was proposed，which could reduce the harmonic content of fast voltage closed-loop in power factor corrector. Base...
更多Number of views：3715 Amount of downloads：1458
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PAN Ling，FENG Qian，ZHANG Peng，SHEN Bing，ZHOU Jian，CHEN Ran，ZHAO Jinshuai
Abstract: Due to the high cable ratio of city grid，the harmonic pollution is aggravated. For the buses with high harmonic voltage content，it is necessary to evaluate the harmonic emission level of the utility side and customer side. Most of the existing evaluation methods are based on two assumptions：1）the harmonic ...
更多Number of views：3782 Amount of downloads：1511
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YANG Zhaowen，YANG Guochao，LIU Jianjun，WANG Hongwei，BAI Xinyu
Abstract: A second order filtering power dividing frequency control strategy based on virtual impedance wasproposed. The different frequency power compensation among different storage units by building invisible passfilters was achieved. The invisible pass filters including high pass filter and low pass filters were...
更多Number of views：3626 Amount of downloads：1719
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ZHAO Jianyong，ZHANG Zhenxiao，DING Yuanjie，YU Ziwei，HAN Junyao， WANG Shenghong，NIAN Heng，LI Xuerong
Abstract: Aiming at the problems of small regulation range and slow speed of traditional voltage regulators such as compensation capacitors in distribution network line voltage compensation，a voltage compensation scheme of distribution network in sparse area was proposed，the voltage hierarchical coordinated control ...
更多Number of views：3543 Amount of downloads：1547
