Double-layer Maintenance Strategy for Offshore Wind Turbines Considering Impact of Typhoon

doi:10.12204/j.issn.1000-7229.2023.07.013

Abstract

Abstract:

Frequent occurrences of extreme weather events, such as typhoons, pose challenges to the development of maintenance plans for offshore wind turbines. Periodic maintenance cannot promptly deal with the impact of severe weather such as typhoons, while condition-based maintenance is infeasible for practical operation owing to random maintenance periods. Periodic maintenance plans for offshore wind turbines require the careful consideration of various factors. Therefore, considering the impact of typhoons, this paper proposes a two-level maintenance optimization strategy: the upper level periodic maintenance optimization considers the comprehensive score of the maintenance cost, transmission capacity of offshore wind power systems, and reliability of the receiving-end grid as optimization objectives; the lower-level condition-based maintenance optimization considers the minimum maintenance cost as the goal and optimizes the arrangement of the condition-based maintenance plan above the upper-level periodic maintenance optimization. Subsequently, an example is provided to compare and evaluate the proposed two-layer maintenance strategy. The example shows that, compared with periodic maintenance and condition-based maintenance, the proposed double-layer maintenance plan can effectively improve the reliability of the receiving-end grid and the transmission capacity of offshore wind power systems with a small increase in maintenance costs.

Key words: offshore wind power, typhoon, maintenance plan, comprehensive indicator score

CLC Number:

TM711

ZHAO Junyu, GAO Shan, XU Lu, ZHAO Xin, HUANG Ruanming, YU Ziyun. Double-layer Maintenance Strategy for Offshore Wind Turbines Considering Impact of Typhoon[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(7): 121-130.

Figures/Tables 10

Fig.1 Double-layer optimization strategy of offshore wind turbine considering the influence of typhoon

Fig.2 Indexes used in the objective function of upper periodic maintenance optimization

Table 1 Probability model of key parameters of typhoon

Fig.3 Influence degree of maintenance mode on component reliability

Fig.4 Influence degree of maintenance mode on component failure rate

Table 2 Index weight

Fig.5 Two-level maintenance strategy for offshore wind turbines

Fig.6 Reliability function of offshore wind turbines under different maintenance methods

Fig.7 Condition-based maintenance plan of offshore wind turbine

Table 3 Comprehensive score of different maintenance methods

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