Design and Operation of Isolated Hybrid Energy System for Sensitive Loads with Consideration of Uncertainties in Resources and Demand

This paper focuses on the optimal design and operation of isolated hybrid energy system supplying sensitive loads, considering uncertainties in renewable resources and demand. The study uses Homer software to determine the optimal combinations of system components and their operation conditions. Renewable resources and load uncertainties are investigated in the form of multiple possible scenarios. The cost equilibrium index (CEI), as a decision making index, is proposed to compare the isolated hybrid energy system with grid development. It could facilitate deciding either develop the grid or create an isolated system based on local energy resources for remote loads. As a case study, design and operation of an isolated hybrid energy system are accomplished for a gas pressure-boosting station in Hamadan, Iran. The results show that the proposed system could supply sensitive loads with adequate reliability and reduce carbon dioxide emissions. According to CEI, the isolated system could be economical for loads ۱۰۰km far from the grid. This study implies isolated hybrid energy system could improve passive defence considerations for sensitive load in contrast to cost of system. Also advancement of renewable technologies and restructuring the energy system would lead to promotion of hybrid isolated energy system in future.

Keywords:

Isolated hybrid energy system , Renewable resources , Sensitive loads , Uncertainty