Abstract
With the development of offshore wind power transmission technology and the emergence of new dimensions in deep-sea wind power scenarios, some indexes in the existing evaluation system cannot meet the comprehensive benefit evaluation of multiple offshore wind power transmission schemes in new operating scenarios, making the identification of the optimal economic distance of different schemes vague. Therefore, this paper integrates multiple parameters into the total life cycle cost and levelized cost of energy indexes for traditional and new transmission schemes in deep-sea scenarios, considers power generation income, environmental and carbon index, and proposes a multidimensional evaluation method for offshore wind power transmission systems, and analyzes the sensitivity of the constructed indicators. Then, using actual geographic information data, the established parameter fusion multidimensional evaluation method is used to analyze the technical and economic ranges of four offshore transmission schemes. The results show that the optimal economic critical interval of active commutation type high voltage direct current transmission system (CSC) is 98 km, which is about 23 % higher than that of voltage source converter based high voltage direct current transmission system (VSC). Therefore, CSC is more suitable for deep offshore wind power transmission than VSC and has better comprehensive technical and economic performance.
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