Heat and power scheduling of PV/Wind/CHP system considering power usage limitation of distribution network in iran

In this study, optimal sizing and scheduling of cogeneration based hybrid system is done to economically meet electrical and thermal demands simultaneously. Demands can be met by grid or distributed generation (DG) resources. In order to come closer to reality, it is assumed that the distribution network has limited the maximum power usage. So, if the user has a request more than the determined value, the new distributed branch should be constructed for costumers. Depend upon the type of request, the costumer should pay some or all of the feeder foundation cost. Determining the type of agreement, size and planning of the system is investigated in this paper. Also, several scenarios are analyzed. Firstly, it is assumed that only the combined heat and power (CHP) system is selected as a DG resource. In second and third scenarios the hybrid PV/CHP and wind/CHP are investigated, respectively. Finally, hybrid PV/Wind/ CHP is analyzed in the last scenario. The results show that the hybrid PV/CHP/Wind system is more affordable than the others.