海上风电场经交流海缆并网谐波谐振放大分析
摘要：采用交流海缆接入电网的海上风电场在电缆线路分布电容的作用下，可能出现陆上风电场不常见的谐波谐振与谐波放大现象，严重威胁到海上风电场安全可靠运行。为研究海上风电场谐波谐振机理与谐波放大影响因素，首先，建立了海上风电场输电系统与集电系统两部分的状态空间模型，并给出谐波放大倍数、谐波含量等指标的计算方法；其次，通过特征值和参与因子揭示了谐波谐振机理及关键影响因素；然后，通过根轨迹法研究了电网短路容量、高压电缆参数和风电机组并网台数对谐振模态的影响；最后，在Matlab/Simulink仿真平台搭建江苏某海上风电场，验证理论分析的有效性。
Abstract:Offshore wind farms connected to the power grid via AC submarine cables may experience harmonic resonance and harmonic amplification due to distributed capacitance of cable lines, which is not commonly observed in onshore wind farms. This poses a serious threaten to the safe and reliable operation of offshore wind farms. To investigate the mechanism of harmonic resonance in offshore wind farms and the influencing factors of harmonic amplification, we first established the state space mathematical model of the transmission network and collector network of offshore wind farms. The calculation methods of harmonic amplification factor, harmonic content, and other indicators were provided. The mechanism and key influencing factors of harmonic resonance were then investigated by means of eigenvalues and participation factors. Additionally, the root locus method was utilized to investigate the impact of grid short-circuit capacity, cable parameters and the number of wind turbine generators (WTGs) on resonance modes. Finally, a model of an offshore wind power system in Jiangsu was constructed on the Matlab/Simulink simulation platform, and the analysis results have confirmed the correctness of the theoretical analysis.
标题：海上风电场经交流海缆并网谐波谐振放大分析
英文标题：Analysis on Harmonic Resonance Amplification Induced by The Integration of AC Submarine Cable in Offshore Wind Farm
作者：顾文, 郑超航, 杨宏宇, 吴熙, 汪泓, 许皓珲,
关键词：海上风电场, 状态空间模型, 谐波谐振机理, 谐波放大,
发表日期：2024-04-10
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