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The group technology is the bottleneck of large-scale lithium battery storage energy system. The estimate of residual capacity of SOC (state of charge) is an important method to realize large-scale group technology and the resistance of battery is a major index evaluating SOC. Wavelet analysis theory is used for equivalent circuit model of lithium battery aiming at the characteristics of output signal...
In parallel converters applications, direct parallel topology was respected because of the advantages of small size, low cost, simple structure and easy to extend. However, the coupling effects maybe exist because the parallel converters are connected by non-isolated mode. In this paper the average model was proposed in the rotating coordinate system. As the entire system is a symmetric structure,...
In this paper, modeling of parallel three-phase converters is first presented. Then definition of the circulating currents of paralleled converters and the circulating-current-generating mechanism are clearly explained. Thus, based on this definition, an averaged model of the circulating current is proposed. It is seen from this model that the circulating current consists of mainly the zero-sequence...
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