Study on Anti-Disturbance for MW Grade back-to-back Converter System Based on Small-signal Modelling

Yaofei Han

Abstract


Dynamic performance of the front-end PWM rectifier is the basic guarantee of stable and reliable operating of a high power back-to-back converter system. Traditional double-loop PI regulator controlling may lead to DC-link voltage fluctuation and even more seriously overvoltage or under-voltage threatening the safe operation of the power switching device. In this paper, a small-signal model of high power virtual-oriented-flux is established to analyze the DC-link voltage fluctuation limitation of systems with conventional load current feed-forward control. A virtual line flux oriented control algorithm is also proposed based on the model mentioned above. Finally, a MATLAB simulation and practical test were carried out to certify the effectiveness and correction of the algorithm.


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References


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Revista de la Facultad de Ingeniería,

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