An implementation of on-line transient stability screening and control using distributed processing

This paper describes the implementation of an online
transient stability assessment software, composed of
algorithms for contingency screening and for the design of
preventive control actions. The implementation of the two parts
rely on a hybrid method called SIME, coupled with a time
domain simulation engine and power flow program. The speed up
of the contingency screening module is obtained by distributing
contingencies on a cluster of computers to comply with extended
real-time speed requirements. A compensation scheme is used to
determine active power rescheduling alternatives in order to
stabilize the dangerous contingencies identified at the screening
step. The software has been coupled with an industrial EMS
platform, and tested in the simulation environment.