An on-line dynamic security assessment implementation

This paper presents the features and implementation of an on-line Dynamic Security Assessment (DSA) function which consists of contingency screening, time-domain simulation and calculation of stability limits. An energy based approach, including an early termination scheme to reduce the computational effort and stability index to calculate the power transfer limit, and automatically determine the degree of stability has been developed and incorporated in the simulation engine. A client server implementation of the simulation engine and concurrent execution of contingencies on multiple workstations is also described. A sample test result is presented. Copyright (C) 1998 IFAC.