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- 저자 : Chenwen Cheng (검색결과 3 건)
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Nian, Heng,Cheng, Chenwen,Song, Yipeng The Korean Institute of Power Electronics 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.3
This paper develops a coordinated control strategy of the doubly fed induction generator (DFIG) system based on repetitive control (RC) under generalized harmonic grid voltage conditions. The proposed RC strategy in the rotor side converter (RSC) is capable of ensuring smooth DFIG electromagnetic torque that will enable the possible safe functioning of the mechanical components, such as gear box and bearing. Moreover, the proposed RC strategy in the grid side converter (GSC) aims to achieve sinusoidal overall currents of the DFIG system injected into the network to guarantee satisfactory power quality. The dc-link voltage fluctuation under the proposed control target is theoretically analyzed. Influence of limited converter capacity on the controllable area has also been studied. A laboratory test platform has been constructed, and the experimental results validate the availability of the proposed RC strategy for the DFIG system under generalized harmonic grid voltage conditions.
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Heng Nian,Chenwen Cheng,Yipeng Song 전력전자학회 2017 JOURNAL OF POWER ELECTRONICS Vol.17 No.3
This paper develops a coordinated control strategy of the doubly fed induction generator (DFIG) system based on repetitive control (RC) under generalized harmonic grid voltage conditions. The proposed RC strategy in the rotor side converter (RSC) is capable of ensuring smooth DFIG electromagnetic torque that will enable the possible safe functioning of the mechanical components, such as gear box and bearing. Moreover, the proposed RC strategy in the grid side converter (GSC) aims to achieve sinusoidal overall currents of the DFIG system injected into the network to guarantee satisfactory power quality. The dc-link voltage fluctuation under the proposed control target is theoretically analyzed. Influence of limited converter capacity on the controllable area has also been studied. A laboratory test platform has been constructed, and the experimental results validate the availability of the proposed RC strategy for the DFIG system under generalized harmonic grid voltage conditions.
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An Optimized Multi-load Wireless Power Transfer System with Constant Load Currents
Zhe Zhou,Weiguo Li,Chenwen Cheng,Zhanfeng Deng,Fangyi Li,Qiuyu Shi,Chris Mi 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper proposes a multi-load wireless power transfer (WPT) system using repeater coils. The repeater unit that contains two repeater units is designed. The series-parallel-series (SPS) compensation method is used for each repeater unit. The constant load current for all the loads can be obtained with suitable resonant condition when neglecting the coils’ parasitic resistances. A feasible coil structure is designed where the two repeater coils in the same repeater unit are both bipolar that are placed perpendicularly so that the coupling between them can be neglected. A ferrite plate is inserted between the two bipolar coils in each repeater unit to enhance the magnetic coupling between adjacent units. Moreover, the proposed system has been optimized so that the system efficiency can be improved. The simulation results are given to validate the effectiveness of the proposed WPT system.
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