摘要
目前对集群风电场谐振的研究多集中于次同步与高频谐振问题,缺乏对含静止无功发生器(SVG)的集群风电场中频谐振机理的深入探索.针对空载线路投入导致的风电场区域系统中频谐振问题,根据谐波线性化理论,分别建立定功率因数控制与恒无功控制模式的SVG序阻抗模型以及直驱风机序阻抗模型.采用阻抗分析法,发现SVG采用定功率因数控制将扩大风电场区域系统中频负阻尼范围,增加风电场区域系统发生中频谐振的风险,因此提出一种基于SVG电压前馈施加低通滤波器的谐振抑制措施,实现对风电场区域系统的阻抗重塑,以减小风电场区域系统负阻尼区间.最后通过仿真验证了理论分析和所提谐振抑制措施的正确性.
At present,the research on the resonance of cluster wind farm mostly focuses on the problems of sub-synchronous resonance and high-frequency resonance. There is a lack of deep research on medium fre⁃ quency resonance mechanism of cluster wind farm with static var generator(SVG). Aiming at the medium frequency resonance problem of the wind farm area system caused by the insert of unloaded line,according to the harmonic linearization theory,the SVG sequence impedance model is established for constant power factor control and constant reactive power control modes,and the sequence impedance model is also created for direct drive permanent magnet synchronous generator. Using the impedance analysis method,it is found that the use of constant power factor control in SVG extends the medium frequency negative damping range of the wind farm area system,increases the risk of medium frequency resonance of wind farm area system. Resonance suppression measures are adopted to realize the impedance reshaping of the wind farm area system,so as to reduce the negative damping range of the wind farm area system. Finally,the correct⁃ ness of the theoretical analysis and the proposed resonance suppression measures are verified by simulation.
作者
陈继开
郝鑫
常旗峰
李平
李浩茹
初壮
CHEN Jikai;HAO Xin;CHANG Qifeng;LI Ping;LI Haoru;CHU Zhuang(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education,Northeast Electric Power University,Jilin 132012,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2023年第9期39-46,共8页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(52077030)。
