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The output voltage range of PV cells is widely influenced by the environment factors, such as temperature, solar radiation, etc. The lower output voltage of solar array can hardly meet the requirements for grid-connected operation of the system. To achieve high voltage gain and a steady ac output voltage in spite of the low dc input voltage, this paper presents a novel single-stage high gain current...
A model for supercapacitor voltage equalization strategy is analyzed, and on this basis a supercapacitor voltage equalization method for rubber tyred gantry crane (RTG) energy saving system is proposed, namely active voltage equalization method based on buck-boost converter. The equalizing speed of the proposed method is fast. Firstly, the working principle and process of the voltage equalization...
In order to solve the problem that the existing rubber-tyred gantry (RTG) crane consumes massive generating/braking energy through resistance, produces plenty of heat, causes excessive fuel consumption and exhaust emission during working, the relation of energy flows of the existing system is analyzed and the value of the improvement of energy-saving is confirmed in the paper. The constitution and...
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