Abstract
Because of the bad environment of wind farms in the far -reaching sea, the cost of power collector system is high. The contradiction between economy and reliability of the power collector system planning is particularly prominent. According to the particularity of the wind farm in the far-reaching sea and the demand of the power collector system on higher reliability, this paper proposes the definition of topological redundancy of the power collector system and develops a multi-objective optimization model based on the topological redundancy. Thus, the contradictory variables of economy and reliability are optimized. Taking a large-scale offshore wind farm as an example, based on the topological redundancy assessment, the topology of its power collector system is optimized from the perspective of life cycle cost. The results show that, although the initial cost of the optimal redundancy topology is slightly higher than that of the radial structure, the advantage of life cycle cost after 8 years of operations is obvious, which can meet the actual engineering requirements of the power collector system for the wind farm in the far-reaching sea.
Highlights
As the core of offshore wind farms, the power collector system is relevant to the operation efficiency, performance and economic benefits of offshore wind farms, and is the crucial equipment for safe and reliable operation of offshore wind farms [1,2]
It’s significant to take a comprehensive consideration of full life cycle cost of offshore wind farm power collector system
Based on the characteristics of the typical radial and ring topology of the offshore wind farm power collector system, this paper proposes a topological structure with partial redundancy, establishes a total cost optimization model for the full life cycle of the redundancy of the power collector system, and gives a specific optimization flow chart
Summary
As the core of offshore wind farms, the power collector system is relevant to the operation efficiency, performance and economic benefits of offshore wind farms, and is the crucial equipment for safe and reliable operation of offshore wind farms [1,2]. It’s significant to take a comprehensive consideration of full life cycle cost of offshore wind farm power collector system. At present, these models focus on radial structure [6] or ring structure [9] with mature engineering cases. Combined with a planned large-scale offshore wind farm case, the case results are analyzed from the comprehensive consideration of the full life cycle cost and reliability cost of the collector system, utilizing economic cost change curve of the typical topology structure of the power collector system and its advantages or disadvantages so as to provide data basis for the planning of far-reaching large-scale offshore wind farm
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