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A novel PV power inverter applied in micro-grid is developed in this paper. It runs not only in connected-grid but also in disconnected-grid and keeps voltage stable rapidly in transient process. When the inverter is connected with the grid, the inverter produces power as a current-source with voltage-current close loop control strategy. Once the islanding event takes place, it runs as a voltage-source,...
When it is in the wet season and the load is low, reactive power surplus and voltage rise are caused by high-efficiency power generation of small hydropower and load reduction in Linjiang region, Baishan city, JiLin province. These problems, which exist in the power grid, are systematically analyzed in this paper. The solution measures are proposed including generator in leading power factor on operation,...
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