An isolated hybrid renewable energy system: Ha'apai island group in the Kingdom of Tonga

Abstract

Hybrid renewable energy systems (HRES) have become more and more popular, especially for isolated regions. Various renewable energy resources are utilised to produce energy for different usage. This paper discusses the design of HRES for the Ha'apai island group. Possible renewable resources for electricity generation are investigated and the optimum system configuration at the lowest capital expenditure is obtained by HOMER software. Moreover, an analysis of the impact on diesel price and renewable penetration to HRES is presented, and the feasible option for Ha'apai is derived from system simulation.