Cost Power Curtailment Analysis for Optimum PV Size and the Energy Potential for the Desalination Plant on the Island Distribution System

This paper proposes a power curtailment strategy that limits the injected current on the grid-line with the voltage control scheme for optimal PV sizing of PV system according to the provided temperature and solar irradiation in an island-scale distribution system. The proposed voltage control approach is applied to remove above-limit injected PV power to sustain voltage variation ratio within the required limits. When this scheme applied on different size of PV projects although there is a drawback on the increased PV rejection, the optimum PV size can be determined on the maximum net present value (NPV) of the PV project. It is found that all year round on the selected island scale distribution system the rejected PV generation of the optimum PV capacity accounts much better for used on the island desalination plant than not used. Thus a better utilization of solar energy can be enhanced.