Analytical expression of equivalent duration and sensitivity model of aperiodic component of post‐fault thermal effect of DFIG,International Transactions on Electrical Energy Systems

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Analytical expression of equivalent duration and sensitivity model of aperiodic component of post‐fault thermal effect of DFIG
International Transactions on Electrical Energy Systems ( IF 1.9 ) Pub Date : 2021-03-22 , DOI: 10.1002/2050-7038.12874
Shenghu Li ₁ , Yahai Zhang ₁ , Yuting Hua ₂ , Qirui Zhao ₁ , Aobo Zhang ₁

Affiliation

The temperature rise caused by the close fault may damage the doubly‐fed induction generator (DFIG) and other electrical equipments. The thermal effect will be quantified by the step‐by‐step integration, which however cannot differentiate the periodic and aperiodic components. In this paper, the thermal effect of the DFIG is described by 10 components. According to their attenuation of the components, the periodic and the aperiodic components of the thermal effect are determined. To facilitate calculation, the analytical expression of the equivalent duration of the aperiodic components is proposed. To quantify the contributing factors to the thermal effect, the sensitivity model of the equivalent duration to the relevant factors is proposed. The numerical results validate the accuracy of the proposed equivalent duration and sensitivity model of the aperiodic component with different wind speeds and fault severities. The research provides the practical tool for the security of the DFIG, and gives the basis of the future work of the thermal stability check of the wind farms.

中文翻译：

DFIG故障后热效应非周期性分量的等效持续时间和灵敏度模型的解析表达式

由闭合故障引起的温度升高可能会损坏双馈感应发电机（DFIG）和其他电气设备。热效应将通过逐步积分来量化，但是无法区分周期性和非周期性分量。在本文中，DFIG的热效应由10个组件描述。根据它们对分量的衰减，确定热效应的周期性和非周期性分量。为了便于计算，提出了非周期分量等效持续时间的解析表达式。为了量化影响热效应的因素，提出了等效时间对相关因素的敏感性模型。数值结果验证了所提出的等效周期和具有不同风速和故障严重程度的非周期性分量灵敏度模型的准确性。该研究为DFIG的安全性提供了实用工具，并为风电场热稳定性检查的未来工作奠定了基础。

更新日期：2021-05-03

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