双馈风机的动态稳定分析

本文探讨了双馈型风电场并网后对地区电网动态稳定性的影响。建立了风电机组的空气动力学模型、轴系模型及桨距角控制系统模型；并在此基础上推导了风电场接入后的地区电网动态稳定特征值分析的状态矩阵。对风电机组接入的广西电网动态稳定性的影响进行全面的仿真分析，仿真证明，通过调整风电场的接入位置，以及采用变速风电机组的稳定控制模型，这两种方式能够有效改善系统阻尼，增强系统动态稳定性。

Dynamic Stability Analysis of the Wind Farm with DFIGs

The impact of grid-connected wind farms with doubly-fed induction generators(DFIG) on power system dynamic stability is systematically assessed. In the double-fed wind turbine modeling, the linearized status equations of the aerodynamic model, shaft system model and pitch control model of the wind turbine generator are established for analyzing dynamic stability. Then, the corresponding state matrix related to the dynamic stability analysis with grid-connected wind faims of the DFIG type is deduced. A comprehensive simulation on dynamic stability of Guangxi Power Grid with wind turbine access is conducted. The simulation result shows that through adjusting the location of wind farm access and variable speed wind turbine control model can effectively improve the system damping and enhance the dynamic stability of power system.