A Sub-synchronous and Hyper-synchronous Risk Assessment Method for Direct-drive Wind Turbine Based on Dynamic Characteristics

2023 IEEE International Conference on Power Science and Technology (ICPST) Pub Date : 2023-05-05 DOI:10.1109/ICPST56889.2023.10165543

Shuxian Yi, Xie Huan, Tianzhi Cao, Peng Zhang

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Abstract

This paper proposes a sub-synchronous and hyper-synchronous risk assessment method for direct-drive wind turbine based on dynamic characteristics. Firstly, this paper establishes the linearization model of direct drive wind turbine and analyzes the influence of inner loop and outer loop control parameters of grid-side converter on oscillation mode, which points out that the oscillation mode is determined by the outer loop parameters of grid-side converter while the inner loop parameters have little effect. Secondly, based on dominant mode method the high-order transfer function of direct-drive wind turbine can be reduced to a second-order system. Thirdly, risk evaluation index of sub-synchronous and hyper-synchronous oscillation for direct drive wind turbine is proposed, which includes overshoot and adjusting-time to fully consider the initial amplitude caused by the disturbance and the attenuation speed of the oscillation after the disturbance. Finally, the feasibility of the proposed risk assessment method and the effectiveness of the evaluation index are verified through calculation example and simulation result.

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基于动态特性的直驱风电机组次同步和超同步风险评估方法

提出了一种基于动态特性的直驱风电机组亚同步和超同步风险评估方法。首先，建立了直驱式风力发电机组的线性化模型，分析了电网侧变流器内外环控制参数对其振荡模态的影响，指出其振荡模态由电网侧变流器外环参数决定，而内环参数影响不大。其次，利用优势模态法将直驱风电机组的高阶传递函数简化为二阶系统;第三，提出了直驱风电机组亚同步和超同步振荡风险评价指标，该指标包括超调量和调整时间，充分考虑扰动引起的初始振幅和扰动后振荡的衰减速度。最后，通过算例和仿真结果验证了所提风险评价方法的可行性和评价指标的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2023 IEEE International Conference on Power Science and Technology (ICPST)

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