双馈风电场抑制电网低频振荡的自适应附加控制策略

doi:10.16183/j.cnki.jsjtu.2022.135

上海交通大学学报 ›› 2023, Vol. 57 ›› Issue (9): 1156-1164.doi: 10.16183/j.cnki.jsjtu.2022.135

所属专题：《上海交通大学学报》2023年“新型电力系统与综合能源”专题

• 新型电力系统与综合能源 • 上一篇下一篇

双馈风电场抑制电网低频振荡的自适应附加控制策略

刘新宇¹(), 王森¹, 曾龙², 原绍恒¹, 郝正航³, 逯芯妍¹

1.华北水利水电大学电力学院,郑州 450011
2.广东工业大学自动化学院,广州 510006
3.贵州大学电气工程学院,贵阳 550025

收稿日期:2022-05-03 修回日期:2022-06-28 接受日期:2022-11-28 出版日期:2023-09-28 发布日期:2023-09-27
作者简介:刘新宇(1976-),副教授,从事控制理论与控制工程、新能源发电与智能电网、模式识别与智能系统研究. E-mail:lxy@ncwu.edu.cn.
基金资助:
河南省高等学校重点科研项目(21A120006)

An Adaptive Additional Control Strategy for Suppressing Low-Frequency Grid Oscillations in Doubly-Fed Wind Farms

LIU Xinyu¹(), WANG Sen¹, ZENG Long², YUAN Shaoheng¹, HAO Zhenghang³, LU Xinyan¹

1. School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450011, China
2. School of Automation, Guangdong University of Technology, Guangzhou 510006, China
3. The Electrical Engineering College, Guizhou University, Guiyang 550025, China

Received:2022-05-03 Revised:2022-06-28 Accepted:2022-11-28 Online:2023-09-28 Published:2023-09-27

摘要/Abstract

摘要：

针对大型风电场跨区输送电能时引起的弱或负阻尼低频振荡问题,提出一种基于李雅普诺夫稳定性理论的快速终端滑模附加阻尼控制策略.研究双馈风力发电机(DFIG)灵活的功率调控特性和快速响应阻尼调节能力,根据DFIG转子外加电压与磁链之间的关系和滑模变结构控制方法设计转子磁链控制器.在系统发生低频振荡时,期望磁链值与实际磁链值产生偏差,附加阻尼控制器输出一个自适应控制信号到转子侧功率控制环节,提高风电场有功出力,抑制系统的低频振荡.在MATLAB/Simulink中建立风电并网系统仿真模型进行离线仿真实验,并搭建基于实时数字仿真系统的大型风电场跨区输电模型进行实时仿真验证.离线仿真和实时仿真结果均表明:当系统发生低频振荡时,应用所提控制方法能够快速调节DFIG发出有功功率,增强系统的阻尼水平,有效抑制系统低频振荡抑制.

关键词: 双馈风力发电机, 频率稳定性, 低频振荡, 李雅普诺夫稳定性, 滑模控制

Abstract:

Aiming at the problem of weakly or negatively damped low-frequency oscillations caused by cross-zone transmission of electricity from large wind farms, this paper proposes a fast terminal sliding-mode additional damping controller based on the Lyapunov stability theory. By investigating the flexible power regulation characteristics and the capability of dynamic frequency response to damping regulation of doubly-fed wind turbines (DFIG), a rotor magnetic chain controller is designed according to the relationship between the applied voltage and magnetic chain of DFIG rotor and the sliding mode variable structure control method. When low-frequency oscillations occur in the system, the desired magnetic chain value will deviate from the actual magnetic chain value. The additional damping controller outputs an adaptive control signal for the rotor-side power control link to increase the active output of the wind farm and suppress low-frequency oscillations in the system. A simulation model of the wind power grid-connected system is established in MATLAB/Simulink for off-line simulations, and a real-time simulation experiment of a large wind farm cross-zone transmission model based on real time digital simulation system is conducted. The results of both off-line and real-time simulations show that when low-frequency oscillations occur in the system, the proposed control method can quickly regulate the active power emitted by the DFIG and enhance the damping level of the system, which is effective in suppressing low-frequency oscillations in the system.

Key words: doubly-fed wind turbines (DFIG), frequency stability, low-frequency oscillation, Lyapunov stability, sliding mode control

中图分类号:

TM614
TM712

刘新宇, 王森, 曾龙, 原绍恒, 郝正航, 逯芯妍. 双馈风电场抑制电网低频振荡的自适应附加控制策略[J]. 上海交通大学学报, 2023, 57(9): 1156-1164.

LIU Xinyu, WANG Sen, ZENG Long, YUAN Shaoheng, HAO Zhenghang, LU Xinyan. An Adaptive Additional Control Strategy for Suppressing Low-Frequency Grid Oscillations in Doubly-Fed Wind Farms[J]. Journal of Shanghai Jiao Tong University, 2023, 57(9): 1156-1164.

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双馈风电场抑制电网低频振荡的自适应附加控制策略

An Adaptive Additional Control Strategy for Suppressing Low-Frequency Grid Oscillations in Doubly-Fed Wind Farms

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