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This paper has developed a hybrid PV/Battery system with the ability of grid-connected and island operating control, the objectives are to improve controllable grid-connected ability of PVs, reduce PVs output fluctuation due to changes of environmental factors such as solar intensity, regulate isolated network voltage and frequency with the participation of PVs. The converter consists of three DC/DC...
This paper presents a speed fluctuation reducing method for sensor-less PMSM-compressor system in air-conditioners. The rotor speed and position are estimated based on model reference adaptive system(MRAS) method. A combined control method for the q-axis reference current is proposed to resolve the dilemma of PI tuning problems in conventional vector control system and reduce the speed fluctuation...
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