This paper constructs an integrated electromagnetic transient model for floating offshore wind turbines (FOWTs) to investigate the transient effects of lightning strikes. Utilizing the ATP-EMTP simulation program
the effects of submarine ground resistivity
anchor length
and anchor chain length on tower base overvoltage during lightning events are analyzed. With the objectives of minimizing overvoltage at the tower base and mooring chain cost
the NSGAⅡ genetic algorithm is employed
using mooring chain length as the decision variable
to obtain a Pareto solution set. Optimal mooring chain length is determined through entropy weighting and TOPSIS methods
culminating in a multi-objective optimized model. Results indicate that lightning-induced overvoltage at the tower base reaches the kV level
positively correlating with seabed soil resistivity and anchorage length
and negatively with mooring chain length. Multi-blade lightning strikes produce overvoltages 1.57 to 3.48 times higher than single-blade strikes. The multi-objective optimization yields an optimal mooring chain length of 41.19 m.
ALIPIO R, CONCEIÇÃO D, DE CONTI A, et al. A comprehensive analysis of the effect of frequency-dependent soil electrical parameters on the lightning response of wind-turbine grounding systems[J]. Electric power systems research, 2019, 175: 105927.
陶世祺. 海上风力发电机组雷电瞬态研究[D]. 北京: 北京交通大学, 2019.
KRITIKOU C, PASTROMAS S, KOUTRAS K, et al.Investigation of lightning effects in offshore wind units[C]//2022 36th International Conference on Lightning Protection (ICLP). Cape Town, South Africa, 2022: 220-225.
ZHANG J, HAN Y X, LI L C, et al.The impact of lightning strike to multi-blade on the lightning overvoltage and stresses of arresters in offshore wind farm[J]. IET renewable power generation, 2021, 15(13): 2814-2825.
SUN Q Q, YANG L, ZHENG Z, et al.A comprehensive lightning surge analysis in offshore wind farm[J]. Electric power systems research, 2022, 211: 108259.
KARIMI M, HALL M, BUCKHAM B, et al.A multi-objective design optimization approach for floating offshore wind turbine support structures[J]. Journal of ocean engineering and marine energy, 2017, 3(1): 69-87.
JIANG J L, CHANG H C, KUO C C, et al.Transient overvoltage phenomena on the control system of wind turbines due to lightning strike[J]. Renewable energy, 2013, 57: 181-189.
DE CONTI A, ALIPIO R.Single-port equivalent circuit representation of grounding systems based on impedance fitting[J]. IEEE transactions on electromagnetic compatibility, 2018, 61(5): 1683-1685.
SHARIATINASAB R, KERMANI B, GHOLINEZHAD J.Transient modeling of the wind farms in order to analysis the lightning related overvoltages[J]. Renewable energy, 2019, 132: 1151-1166.
ZHANG J H, SUN Q Q, ZHENG Z, et al.Lightning surge analysis for hybrid wind turbine-photovoltaic-battery energy storage system[J]. Electric power systems research, 2023, 225: 109803.
TAO S Q, ZHANG X Q, WANG Y W, et al.Transient behavior analysis of offshore wind turbines during lightning strike to multi-blade[J]. IEEE access, 2018, 6: 22070-22083.
LIU F F, CHEN Y Y, QIN W, et al.Optimal design of liquid cooling structure with bionic leaf vein branch channel for power battery[J]. Applied thermal engineering, 2023, 218: 119283.
HU Y J, WU L Z, SHI C, et al.Research on optimal decision-making of cloud manufacturing service provider based on grey correlation analysis and TOPSIS[J]. International journal of production research, 2020, 58(3): 748-757.