Abstract
This paper presents a new control strategy of a photovoltaic system, which consists of a photovoltaic generator PVG coupled to a three phase load and three phase grid by a three phase voltage source inverter VSI without DC-DC converter. The controller is designed by using Backstepping method based on d-q transformation of a new model of the global system. The main goals of this control strategy are to achieve the maximum power point MPPT with very good precision and the unity power factor in level of the grid power flow. Mathematical analysis demonstrate the asymptotic stability of the controlled system and simulation results proved that the controller has achieved all the objectives with high dynamic performance in presence of atmospheric condition changes. Moreover, the proposed controller shows a very good robustness under system disturbance, which presents the most important advantage of this controller compared to the other control strategies. Furthermore, this controller can operate with a high efficiency with any kind of the load.
Highlights
Sustainable energy sources are a very good solution in the global energy problem
This paper presents an advanced control strategy using Backstepping method of a three phase grid connected photovoltaic system feeding non-linear load without DCDC converter
This paper presented an advanced control strategy of a three phase load and grid connected PVG system without boost converter
Summary
Sustainable energy sources are a very good solution in the global energy problem. In this way, photovoltaic system is one of the most important energy solutions; the energy generated by photovoltaic system represents a large part of the total amount of energy produced by renewable energy sources [1], [2]. There are many research efforts to realize these objectives [3]-[7] They have not been able to achieve the goals with a good performance and they haven’t considered all the constraints of the photovoltaic system (abrupt variation of climatic conditions and system’s perturbation). -Compensate Reactive Power and harmonic distortion caused by the load All these goals must be achieved under abrupt atmospheric condition changes and system’s perturbation (load harmonic pollution and system parameters disturbances)
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