Security assessment for intentional island operation in modern power system

Publication year: 2011
Source: Electric Power Systems Research, In Press, Corrected Proof, Available online 14 June 2011

Yu, Chen , Zhao, Xu , Jacob, Østergaard

There has been a high penetration level of Distributed Generations (DGs) in distribution systems in Denmark. Even more DGs are expected to be installed in the coming years. With that, to utilize them in maintaining the security of power supply is of great concern for Danish utilities. During the emergency in the power system, some distribution networks may be intentionally separated from the main grid to avoid complete system collapse. If DGs in those networks could continuously run instead of immediately being shut down, the blackout could be avoided and the reliability of supply could be increased. However, when to…

 Highlights: ► We propose an Islanding Security Region (ISR) concept. ► ISR provides security assessment of island operation. ► By comparing the system state with ISR, system operator knows when to island. ► The computation efficiency can be increased by Artificial Neural Network (ANN). ► By ANN, the online application of ISR can be feasible.