Abstract
This paper presents a technique for interconnecting a photovoltaic generator (PVG) to a main supply of AC nature. The technique has been implemented practically in one of the laboratories of the author’s work place. The technique uses a single phase full wave bridge rectifier. Such bridge rectifier is operated in an inverter mode of operation and that is to guaranty its contribution of real power to a main AC supply. The bridge rectifier is controlled by a practical firing angle controller developed in LABVIEW software environment. The firing angle controller is interfaced to the power bridge rectifier through the use of simple optocoupler and pulse transformer elements. The practical results show that under a certain insolation/irradiation level (taken randomly) and for a resistive load requiring presumably130 W power , the PVG source was contributing 90 W power to such power load and the AC grid was contributing 40 W to such power load The technique of interconnection alleviates the problem of synchronization encountered often when using the traditional way of interconnecting the DC grid (made of conventional renewable energy resources) to the AC grid system.
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