Passivity-based fractional-order sliding-mode control design and implementation of grid-connected photovoltaic systems
作者： Bo Yang , Tao Yu , Hongchun Shu , Dena Zhu , Yiyan Sang
DOI: 10.1063/1.5032266
关键词:
摘要: In order to achieve the maximum power point tracking of photovoltaic (PV) systems in presence time-varying stochastic operation conditions and various uncertainties/disturbances, a passivity-based fractional-order sliding-mode control (PbFoSMC) scheme is proposed. The design can be classified into two steps, i.e., (a) construct storage function terms error DC-link voltage, current, q-axis current for PV system, upon which actual characteristics each term thoroughly analyzed. Moreover, beneficial are carefully retained enhance dynamical responses closed-loop system while detrimental fully removed realize global consistency; (b) based on passivized (FoSMC) incorporated as an additional input, considerably improve performance with aim rapid uncertainties/disturbances rejection. Four case studies, including solar irradiance change, temperature variation, grid voltage drop, inverter parameter uncertainties, undertaken evaluate effectiveness PbFoSMC comparison that proportional-integral-derivative control, (SMC), respectively. At last, dSpace hardware-in-loop test carried out validate implementation feasibility PbFoSMC.
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