Line overload alleviation through corrective control in presence of wind energy

With the growth of wind energy for power generation, several transmission system operators (TSOs) have increasing difficulties to forecast congestions due to the unpredictable nature of the energy source. This paper proposes to enhance congestion management using a real time supervisor. This supervisor performs automatic and dynamic re-dispatchings using both variable speed wind generators and conventional generators. In order to minimize production constraints, the real time congestion management system is based on an indicator of the efficiency of a re-dispatching on the power flowing in an overloaded line. This approach leads to reduced re-dispatching costs and increased network reliability. The simulation of the IEEE 14-bus test power system enhanced by the supervision system is done using the software “EUROSTAG”. Grid integration of renewable generation is therefore increased through renewable production maximization while ensuring network security.

► The paper proposes a congestion management method valid in presence of wind energy. ► A real-time supervisor performs automatic and dynamic re-dispatchings. ► The real-time supervisor is proven stable and efficient. ► This approach reduces re-dispatching costs and increases network reliability. ► This approach increases grid integration of renewable generation.