To investigate the problem of interharmonic in grid-connected currents caused by vehicle shadows in solar photovoltaic(PV)road grid-connected systems,this paper proposes a dynamical model of solar PV road grid-connected systems based on a cellular automaton.It addresses the phenomenon of random dynamics of vehicle shadowing,combines the cellular automata vehicle model,establishes a model of solar PV road arrays under vehicle shadowing,and illustrates the series-parallel output characteristics of PV panels.Then,the small signal modelling is carried out for the grid-connected system of solar PV road array to establish the dynamic model under vehicle shading,and the difference between interharmonic of solar PV road grid-connected system under dynamic stochastic vehicle shadows and conventional PV is analyzed.Through simulation tests under multiple working conditions,the variation laws of two parameters,namely vehicle slowing probability and shading degree,on the amplitude and frequency of interharmonic is revealed.Finally,a test platform of the solar PV road system is built,and the results verify the correctness of the theoretical analysis of this paper,providing a theoretical basis for the subsequent suppression of interharmonic currents brought about by vehicle shading.
关键词
路面光伏并网系统/车辆阴影/间谐波电流/慢化概率/遮荫程度
Key words
solar photovoltaic(PV)road grid-connected system/vehicle shadows/interharmonic currents/probability of slowing down/degree of shading
维普
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