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This paper gave a detailed introduction and analysis on the research status and industrialization situation of current LVRT Technology in doubly-fed wind turbine generator (WTG) system. Starting with the urgency of LVRT research in China, the paper introduced the requirement and test situation of LVRT in the world and China; carried out a systematical analysis on the research status of DFIG-WTG operating...
A three-phase stand-alone PV generation system with unbalanced loads is designed in this paper. The main circuit topology of half-bridge inverter is adopted. Through a LC filter and transformer, local loads are supplied. After analyzing the produce reason of unbalanced voltage, a simple control strategy based voltage single loop is proposed, which makes the three-phase stand-alone PV generation system...
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