含不同风电机组的风电场暂态运行特性仿真研究

Simulation study on the transient operational performances of a wind farm including different wind turbine generator systems

随着大容量风电场集中接入电网,有必要研究含不同风电机组参数和类型的风电场暂态特性及对电网的影响。在分析笼型异步和双馈异步风电机组暂态模型的基础上,分别建立了含不同风电机组的风电场容量加权等值模型。从风电机组不同容量比、风电场不同短路容量比以及电网联络线不同阻抗比角度,对含不同风电机组的风电场暂态运行特性进行仿真。仿真结果表明:在电网接受风能容量一定的条件下,双馈异步风电机组装机容量比例提高以及风电场短路容量比和联络线阻抗比的降低,都可以提高和改善风电场出口处电压和机组的暂态稳定性。

With the development trends of the large scale wind farms being integrated into power systems concentratedly,it is necessary to study the transient performances and the effects on the power system for a wind farm including different parameters and types of wind turbine generator systems（WTGS） .Based on analyzing the transient models of the wind turbine units with squirrel cage induction generator（SCIG） and doubly fed induction generator（DFIG）,the weighted equivalent models of the presented wind farm are established.Then,from the viewpoints of different capacity ratio of wind turbines,different short-circuit capacity ratio of wind farm and different transmission line impedance ratio,the transient operational characteristics of the wind farm with different WTGS are simulated.The comparison results show that under the condition of a constant penetration of wind generation in power system,with the increase of the capacity ratio of the wind turbine units with DFIG in the wind farm,with the decrease of the short-circuit capacity ratio of the wind farm and the transmission line impedance ratio,the transient stability of wind farm output voltage and the WTGS can be improved.