风电接入对电力系统的影响

研究了大规模风电接入对电力系统的影响。通过对基于双馈感应电机的风电机组进行动态建模以及对包含风电场的电力系统进行仿真计算，研究了风电接入对电网电压及输电线路传输功率的影响、风电场的短路电流贡献及其对电网短路容量的影响和风电接入后电网暂态稳定性的变化。研究结果表明大规模的风电接入可能会使电网出现线路传输功率越限、短路容量增加及电力系统稳定性发生变化等问题。最后针对上述问题提出了相应的改善措施。

Study on Impact of Wind Power Integration on Power System

The impact of large-scale wind power integration on power system is studied. By means of the dynamic modeling of wind turbines based on doubly-fed induction generator (DFIG) and power system simulation containing large amounts of wind farms, the impact of wind power integration on grid voltage level and on transferred power of transmission line, the contribution of DFIG based wind turbines to short-circuit current and short-circuit capacity of the grid, the impact of wind power integration on power system transient stability are investigated. The simulation results show that the large-scale wind power integration may cause overload of transmission lines, increase of short-circuit capacity and change of power system transient stability. Corresponding countermeasures to handle above- mentioned issues emerged after the wind farm integration are recommended.