Control and Stability Analysis of a Doubly Fed Induction Generator

Today the penetration level of wind power on the network is high. The power system stability defined as the ability of the system, for given initial operation condition, to regain a normal state of equilibrium after being subjected to a disturbance is the major problem. In this paper we study the control and we analyse the voltage recovery of a doubly fed induction generator after short circuit faults. First, we propose a method which allows controlling the output voltage and frequency for the synchronisation with the network. Once the generator is connected, we introduce appropriate method for control of both active and reactive power flow and output voltage at the same time. The ability of the system to achieve soft and fast synchronisation to the grid and voltage recovery after a short circuit faults is analysed and discussed