Abstract
As a rapid increase in electricity demand is observed globally, distributed generation (DG) based on renewable energy sources is becoming important. This paper addresses with the problem of modeling and the nonlinear control of photovoltaic/fuel cell hybrid distributed generation system (PV/FC HDGS). The power circuit topology consists of two dc–dc boost-type converters and one inverter. The outputs of the two dc–dc converters are connected to a common dc bus. The control objective is threefold: (i) global asymptotic stability of the whole closed-loop control system; (ii) achievement of MPPT of the PV array; (iii) ensuring a tight regulation of the dc-bus voltage. These objectives must be met despite changes of the climatic variables (temperature and radiation) and the power demand of the load. It is clearly shown, using formal analysis and simulations that the designed controller meets all the objectives.
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