Transient Stability Analysis in Power Systems Integrated with a Doubly-Fed Induction Generator Wind Farm

Renewable energy systems, especially wind turbines and farms are nowadays integrated rapidly into power systems and smart grids. Several technical challenges arise due to penetration of wind energy into power networks and systems. In order for system stability and steady state operation to be ensured in power systems and electric networks, steady and dynamic analysis are necessary. We study a standard IEEE 9 bus test system, which is integrated with a Doubly-Fed Induction Generator wind farm, aiming to examine its behaviour during disturbances. Steady state and transient stability configurations are proposed in order to analyze the system described. A three-phase fault is suddenly applied to a load bus. Moreover, critical fault clearing time is identified for the corresponding three-phase fault and results show the maximum time for system stability during a disturbance. The influence of transient stability, including voltage stability, angle stability, active power and reactive power is discussed and research results become important for the smooth integration of wind farms into networks. This study is conducted with the help of PSS/E 34 software simulation tool by Siemens.