Reliability assessment of the hydraulic system of wind turbines based on load-sharing using survival signature

被引：27

作者：

Li, Yao ^{[1
]}

Coolen, Frank P. A. ^{[2
]}

Zhu, Caichao ^{[1
]}

Tan, Jianjun ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China

[2] Univ Durham, Dept Math Sci, Durham DH1 3LE, England

来源：

RENEWABLE ENERGY | 2020年 / 153卷

关键词：

Wind turbines; Load-sharing; Reliability assessment; Survival signature; Reliability sensitivity; Reliability importance;

D O I：

10.1016/j.renene.2020.02.017

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The hydraulic system is one of the most critical subsystems of wind turbines. It is used to reset the aerodynamic brakes. Because of this, the reliability of the hydraulic system is important to the functioning of the entire wind turbine. To realistically assess the reliability of the hydraulic system, we propose in this article the load-sharing based reliability model using survival signature to conduct system reliability assessment. In addition, due to the uncertainty of the failure rates, it is difficult to conduct accurate reliability analysis. The Markov-based fuzzy dynamic fault tree analysis method is developed to solve this issue for reliability modeling considering dynamic failure characteristics. Following this, we explore the reliability importance and the reliability sensitivity of redundant components. The relative importance of the components with respect to the system reliability is evaluated and ranked. Then the reliability sensitivity with respect to the distribution parameters of redundant components is studied. The results of the reliability sensitivity analysis investigate the effects of the distribution parameters on the entire system's reliability. The effectiveness and feasibility of the proposed methodology are demonstrated by the successful application on the hydraulic system of wind turbines. (C) 2020 Elsevier Ltd. All rights reserved.

引用

页码：766 / 776

页数：11

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