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- 저자 : Weibiao Wu (검색결과 2 건)
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A High-Robust Grid-Side Current Feedback Active Damping Design Method for Gridconnected Inverter
Ke Xu,Li Peng,Weibiao Wu,Bowei Lin,Shirong Yang 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
Grid-connected inverter with LCL filter is widely employed in renewable energy generation system due to high harmonic suppression ability. However, the resonance issue caused by LCL filter is brought easily. To solve this issue, grid-side current feedback active damping control strategy based on proportional derivative algorithm is employed for cost consideration. Taking digital control delay time into consideration, the active damping method is analyzed in discrete domain. A parameter design method based on dominant pole optimization is proposed, which can not only enhance damping ability but also achieve high robust performance. The validity of the proposed method is finally confirmed by the experimental results.
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Jian Yu,Jihua Yu,Weibiao Liao,Jianming Xie,Lijuan Niu,Guobin Zhang,Jian Lv,Xuemei Xiao,Yue Wu 한국식물학회 2020 Journal of Plant Biology Vol.63 No.4
Salt stress as one of main abiotic stresses damaged plant growth and development. In this study, the effects of ethylene on Ca2+-regulated rooting index, Na+ and K+ concentration, Na+ transportation and cell ultrastructure during adventitious rooting in cucumber (Cucumis sativus L.) under salt stress were investigated. The results showed that ethylene might play a positive role in Ca2+-regulated rooting index during adventitious rooting under salt stress. Moreover, CaCl2 treatment significantly decreased the intracellular Na+ level but increased K+ content of cucumber explants under salt stress. However, the Na+ and K+ concentration which treated with Ca2+ treatment was significantly influenced by ethylene inhibitors under salt stress. Our results also showed that ethylene might be involved in Ca2+-affected cell ultrastructure of cucumber explants under salt condition. Further analysis showed that ethylene might be responsible for Ca2+-regulated Na+ transport through enhancing the transcriptional and protein levels of Na+/H+ antiporter as well as H+-ATPase for alleviating the negative effects of NaCl stress. Therefore, ethylene might act as a downstream signaling molecule of Ca2+ to maintain Na+ and K+ homeostasis via regulating Na+ transport and preserve the integrity of cellular ultrastructure of cucumber explant during adventitious rooting under salt condition.
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