A Study on Siting of HVAC Offshore Substation for Wind Power Plant using Submarine Cable Cost Model

Abstract

-Development of the technologies for offshore wind power is proceeding actively and the installation capacity is continuously increasing because of its many advantages in comparison with the land wind power. Accordingly, project for Southwestern 2.5GW offshore wind power plant is in progress in Korea. Design of electric power systems for offshore wind power plant is very important due to its high investment and operational costs. Hence, it needs to be designed in order to minimize costs. This way can be employed in determining the installation location of offshore substation for HVAC wind power plant. According to the offshore substation site, MV inter-array cable and HV export cable lengths vary and they change a total cost regarding submarine cable. This paper represents cost models with variables which are MV inter-array cable and HV export cable lengths to locate the offshore substation for HVAC wind power plant. It is classified into submarine cable installation cost, reactive power compensator installation cost, ohmic losses, and unsupplied energy cost. By minimizing a total cost, an appropriate installation site of the offshore substation is determined.

A Comparative Analysis of Economics of PMSG and SCSG Floating Offshore Wind Farms

“…where, x is the water depth and y is the O&M cost. The collection cable loss cost was calculated as Equation (3) based on the AC cable [40].…”

Optimal Design of Power Grid and Location of Offshore Substation for Offshore Wind Power Plant

“…전력망 구성 의 최적화를 위한 초기연구는 해저케이블 비용을 중심으로 구성 된 목적함수의 최솟값을 얻는 것을 목표로 하였다. 연구가 진행 되면서 목적함수에 전력손실비용과 신뢰도비용 [15], 풍속 [16], [17], 후류효과 [4] 등 실제 현실을 반영한 요소를 추가하게 되었 으며, 해상변전소의 위치에 관한 연구도 진행되었다 [18]. 그러나 [21].…”