1.2 Deokjeokdo island in South Korea as test bed

system was built. Through this arrangement, electricity is supplied to the

Hybrid renewable energy system (HRES) comprises of multiple sorts of sustainable power sources, for example, sun based and wind. The principle thought behind the idea of HRES is to give continues and maintainable supply of power to regions particularly far from primary terrains. A HRES can be associated with principle grid or it can likewise be an independent power producing unit, having its very own framework for storing surplus power, depending upon the nearby land conditions and some other monetary conditions. Figure 1 demonstrates the working structure of a conventional HRES with pumped hydro storage (PHS) as energy

Recently, many case studies of installing HRES at a remote location have been conducted around the globe. For instance, Perez-Navarro et al. [1] designed a hybrid system consisting of wind-biomass in order to compensate and stabilize the power production of a 40 MW wind power plant in Spain. Apart from the main equipment, their designed HRES also consisted of other auxiliaries such as stand-by generators, separate ESS and biomass gasifier as well. The extra power generated by the biogas generator was used to compensate the low power production of wind farm. Borhanazad et al. [2] conducted a comprehensive study to investigate the wind conditions, solar radiations and hydro potential of multiple locations in Malaysia for rural electrification. Similarly, Zuberi et al. [3] estimated the biomass potential of Pakistan and concluded that biomass can contribute to generate almost 24% of the total electricity demand of the country. They covered biomasses such as municipal solid waste (MSW), bagasse and livestock in their study. They also presented an idea of stand-alone power generation system using biomass as raw fuel. Bhandari et al. [4] studied a very classic model of HRES for rural electrification, consisting of wind-PV-hydro as primary energy sources. They showed that installing such HRESs at very remote locations can be economically cheaper than connecting aforementioned areas with main grids. Mazzola et al. [5] designed a PVbiomass based HRES for a small town in India and conducted its economic feasibil-

ity as well. The authors mentioned that LCOE can be reduced up to 40% if

community without diesel power generation.

Wind Solar Hybrid Renewable Energy System

1.1 Hybrid renewable energy system (HRES)

storage system (ESS).

Figure 1.

164

Conceptual design of HRES.

Deokjeokdo island (latitude: 37.22°, longitude: 126.15°) is the biggest island in the Ongjin-kun area in South Korea, arranged 50 km far from Incheon ocean port. At the end of 2013, the total population of Deokjeokdo island was approximately 5000 and its area is 21 km<sup>2</sup> . The island has a relatively large population engaged in

Figure 2. Geographical location of Deokjeokdo island in South Korea.

agriculture and tourism, rather than fishing, and is actively developing tourism resources as Green Island. This island is excessively long way from primary land of South Korea, so it is not monetarily suitable to associate it with main framework for power transmission. Subsequently, this island has its very own power generation system fueled by diesel. In any case, the local government has demonstrated its enthusiasm to make Deokjeokdo island, a green island as far as power generation is concerned. Present study investigates the sustainable power source potential at the mentioned site and after that recommends an ideal HRES dependent on economic assessments.

Figure 2 demonstrates geographical details of the Deokjeokdo including the Urumsil town and test bed of the hybrid renewable energy system.
