Turbine Stability-constrained Primary Frequency Control of Wind Turbine Generator

被引：0
|
作者：
Zhang Z. [1 ]
Yin M. [1 ]
Li Y. [1 ]
Chen Z. [1 ]
Li Q. [2 ]
Zou Y. [1 ]
机构：
[1] School of Automation, Nanjing University of Science and Technology, Jiangsu Province, Nanjing
[2] Jiangsu Electric Power Research Institute, Jiangsu Province, Nanjing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 04期
基金：
中国国家自然科学基金;
关键词：
closed-loop rotor speed control; primary frequency regulation; rotor speed stability; turbulent wind; wind turbine generator;
D O I：
10.13334/j.0258-8013.pcsee.212725
中图分类号：
学科分类号：
摘要：
Modern power systems with soaring wind power penetration level urgently calls for wind turbine generators (WTGs) to participate in primary frequency regulation. The primary frequency control of WTGs can be realized by releasing the kinetic energy (KE) stored in wind rotor. Because the WTG decelerates while the electric power is adjusted for system frequency regulation, a problem is the coordination between maintaining WTG stability and supporting system frequency. Existing works had tried to enhance WTG stability by setting an active power reference positively correlated to the rotor speed, which, however, is essentially not closed-loop feedback control. This paper revealed that the risk of WTG instability still existed when the conventional KE-based primary frequency control was implemented at wind lulls. In order to overcome the instability problem of WTG with primary frequency control under turbulent wind, this paper investigates the stability boundary of WTG with existing KE-based primary frequency control, interpreted the mechanisms of WTG instability, and proposes an improved strategy based on a supplementary closed-loop rotor speed control. Finally, experiments on a wind power-integrated power system testbed validates that the proposed method ensures the operational stability of WTG participating in primary frequency regulation under turbulent wind. ©2023 Chin.Soc.for Elec.Eng.
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页码：1471 / 1480
页数：9
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