Stability Enhancement of Electrical Networks Integrated with Doubly Fed Induction Generator based Wind Turbines
The stability of a power system is an ability of an electric power system that regains its stable condition after experiencing some fault in its network. The system is unstable when one generator loses its stable synchronism performance. This paper investigates the transient stability of an IEEE 9-bus system during faults that happen in different bus locations. Additionally, the analysis contributes to the integration of the exciter IEEE type-1 and power system stabilizer (PSS) to improve the power angle stability in the power system. The fault at bus 4 has the highest amplitude in which it increases to 77.58 degrees for the power angle of Synchronize Generators (SGs). The absence of PSS showed that the system still oscillates and it is unstable. The integration of PSS with suitable parameters enables the system to damp the oscillations of power angle and to reduce the settling time to 5.69 seconds during the fault at bus 4. Moreover, the PSS is connected to SGs through the excitation system to improve the stability of the system in relative power angle of SGs, speed deviation, and electrical power of SGs. Hence, the proposed controller with suitable parameters enhances the transient stability of the power systems.