电测与仪表2023，Vol.60Issue(12)：65-70,6.DOI:10.19753/j.issn1001-1390.2023.12.009
直驱风电场经交流并网系统dq阻抗模型及稳定性分析
DQ impedance model and stability analysis of direct-drive wind farm via AC grid-connected system
摘要
Abstract
In order to study the new subsynchronous oscillation problem caused by the interaction between the converter controller and the grid in the direct-drive wind farm via the AC grid-connected system,comprehensively considering the internal control dynamic characteristics,AC dynamic response and power transmission characteristics of the converter,the dq equivalent impedance model of the direct-drive wind turbine via the AC grid-connected system is deduced in this pa-per.Combined with the stability criterion of the system impedance,the influence of the change of the internal control pa-rameters of the grid-side converter of the direct-drive wind turbine on the subsynchronous oscillation is analyzed.Research result shows that as the PI control parameters(Kp,Ki)of the inner and outer loops of the grid-side converter decrease,the risk of oscillation instability increases and the system stability decreases.Finally,the correctness of the model and the-oretical analysis is verified by time-domain simulation under PSCAD/EMTDC environment.关键词
直驱风电机组/次同步振荡/dq阻抗模型/稳定性分析Key words
direct-drive wind turbine/subsynchronous oscillation/dq impedance model/stability analysis分类
信息技术与安全科学引用本文复制引用
肖垒,蔺红..直驱风电场经交流并网系统dq阻抗模型及稳定性分析[J].电测与仪表,2023,60(12):65-70,6.基金项目
国家自然科学基金资助项目(52367012) （52367012）
