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1.电工材料电气绝缘全国重点实验室(西安交通大学),陕西省西安市 710049
2.陕西省智能电网重点实验室 (西安交通大学),陕西省西安市 710049
3.西安交通大学电气工程学院,陕西省西安市 710049
4.国网上海市电力公司,上海市 200233
Received:04 January 2025,
Revised:2025-07-02,
Online First:12 December 2025,
Published:25 February 2026
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张智豪,寇鹏,田润泽等.海上风电柔直并网系统多模态振荡交互分析和抑制方法[J].电力系统自动化,2026,50(4):10-23.
ZHANG Zhihao,KOU Peng,TIAN Runze,et al.Analysis and Suppression Method for Multi-modal Oscillation Interaction in Flexible DC Grid-connected System of Offshore Wind Power[J].Automation of Electric Power Systems,2026,50(4):10-23.
张智豪,寇鹏,田润泽等.海上风电柔直并网系统多模态振荡交互分析和抑制方法[J].电力系统自动化,2026,50(4):10-23. DOI: 10.7500/AEPS20250104003.
ZHANG Zhihao,KOU Peng,TIAN Runze,et al.Analysis and Suppression Method for Multi-modal Oscillation Interaction in Flexible DC Grid-connected System of Offshore Wind Power[J].Automation of Electric Power Systems,2026,50(4):10-23. DOI: 10.7500/AEPS20250104003.
海上风电柔直并网系统存在同时出现中频振荡(MFO)和次同步振荡(SSO)的可能。目前已有的相关振荡研究工作,大多仅聚焦于单一频率振荡的形成机理,难以揭示MFO和SSO同时出现时,不同频率振荡模态间的相互作用路径。因此,文中针对海上风电柔直并网系统,开展MFO和SSO相互作用分析和抑制机制研究。首先,利用模态分析法,研究海上风电柔直并网系统中同时出现MFO和SSO的可能性;然后,基于网侧变流器及其控制器动态,分析MFO和SSO之间的相互作用路径,揭示二者共同作用下产生次级振荡分量的机理;最后,研究振荡抑制方法,实现MFO、SSO及次级振荡的有效抑制。
In flexible DC grid-connected system of offshore wind power
there exists a possibility of simultaneous occurrence of medium-frequency oscillation (MFO) and sub-synchronous oscillation (SSO). At present
most of the related oscillation research work only focuses on the formation mechanism of single-frequency oscillations
making it difficult to reveal the interaction paths among different frequency oscillation modes when MFO and SSO appear simultaneously. Therefore
this paper focuses on the analysis of the interaction and suppression mechanism between MFO and SSO in the flexible DC grid-connected system of offshore wind power. Firstly
modal analysis method is utilized to investigate the possibility of the simultaneous occurrence of MFO and SSO in the flexible DC grid-connected system of offshore wind power. Subsequently
based on the dynamics of the grid-side inverter and its controller
the interaction path between MFO and SSO is analyzed to reveal the mechanism of secondary oscillation components generated by their combined action. Finally
oscillation suppression methods have been studied to achieve the effective suppression of MFO
SSO and secondary oscillations.
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