Analysis of Dynamic Response Characteristics for 5 MW Jacket-type Fixed Offshore Wind Turbine

Abstract

Owing to the increasing global environmental regulations and energy crisis, wind energy is gaining global interest as eco-friendly alternative renewable energy that can be sustained. The wind power generation technology that converts fluid kinetic energy into electric energy has already been technologically verified, and large land-based wind turbines have been constructed worldwide since the 1980s (Jang and Sohn, 2011).However, constructing large land-based wind turbines causes various issues such as spatial limitations, noise, radio interference, and visual discomfort. Moreover, high energy generation efficiency is difficult to obtain in land-based wind power generation owing to low wind speed and turbulence caused by interference from surrounding terrain features (Li et al., 2018). Offshore wind power generation results in high power generation efficiency because the offshore wind speed is, on average, at least 70% higher than that on land, and large wind turbines can be installed because wide installation spaces are available (Park et al., 2021).Consequently, offshore wind turbines have recently been installedand operated in numerous regions, and many fixed type wind turbines have been installed in relatively shallow coastal areas. Particularly, in South Korea, the Jeju Tamla Offshore Wind Farm was constructed in 2017 and has ten 3 MW wind turbines in operation, and the Offshore Wind Farm in the Southwestern Coast of Yellow Sea was constructed in 2019 and has twenty 3 MW wind turbines in operation (Jeong et al., 2020; Oh et al., 2020). As the demand for offshore wind turbines increases, studies on them have been actively conducted. Shi et al. (2011) carried out dynamic response analysis according to the shapes of the substructures of a 5 MW offshore wind turbine and reported that the load and dynamic response acting on a monopile-shaped substructure have larger values

Structural Design of the Substructure of a 10 MW Floating Offshore Wind Turbine System Using Dominant Load Parameters

“…Yu and Shin [5] used OpenFAST to obtain the dynamic response of a FOWT with a 5 MW turbine as proposed by the National Renewable Energy Laboratory (NREL). The dynamic behavior of a fixed offshore wind turbine was analyzed using OpenFAST [6]. Zhao et al [7] used OpenFAST to evaluate the fatigue damage of a 10 MW FOWT with a semi-submersible substructure where the substructure was replaced with the equivalent stiffnesses.…”

Dynamic Response Analysis of Wind Turbine Structure to Turbulent Wind Load: Comparative Assessment in Time and Frequency Domains

“…Some studies preliminarily utilize the time domain method to represent different load conditions and dynamic responses, with a few results represented in the frequency domain [12][13][14][15][16][17]. Conversely, the frequency domain method is predominantly used to analyze the dynamic response of the structure to various load conditions [18], although both methods can also be implemented for load conditions and responses [19][20][21][22][23].…”