Dynamic simulation of a 110-kV-network during grid restoration and in islanded operation

This paper presents decisive factors for a stable islanded grid restoration and operation. To get a detailed replication of the electrical conditions during grid restoration network, operators are dependent on dynamic simulations. Therefore, the 110-kV-grid of the Austrian network operator KELAG Netz GmbH (KNG) and the generation units of the Austrian power plant operator KELAG are modeled in a simulation program. By evaluating the simulation model with measured time courses of frequency and active power a realistic simulation model of the real system is obtained. Hence, the grid restoration plan of the KNG is verified and its possibilities of optimization are shown. Complementing the restoration plan with an new built generator is determined as well. Finally, an optimized grid restoration plan for islanded grid restoration is provided.