风电场采用柔性直流输电接入的阻抗建模及稳定性分析

Impedance Modeling and stability Analysis of Flexible HVDC Transmission System in Wind Farm

采用基于阻抗模型的稳定性分析方法,对柔性直流输电接入下的风电场系统进行小信号阻抗模型推导和分析,然后使用奈奎斯特判据对其阻抗率进行判断,同时用具体的电路仿真来验证风电场系统的各种表现。分析表明,这种阻抗分析模型能够确定造成风电场不稳定性和谐振问题的根本原因,也能提出可能的解决方案。

Based on the impedance model of the stability analysis method the small signal impedance model of the wind farm system under the flexible HVDC transmission system is derived and analyzed. Then the Nyquist criterion is used to judge the impedance of the system. At the same time, the performance of the wind farm system is verified by the specific circuit simulation The analysis shows that this model can not only determine the root cause of the instability of the wind farm, but also put forward the possible solutions.