Small signal security index for contingency classification in dynamic security assessment

Abstract

This paper presents a security index for quantifying the small signal security of power systems. The index refers to the characteristics of system oscillation modes and delivers the degree of change in system security due to contingencies. The index can be of supplemental use in power system contingency screening and ranking.Moreover, the paper suggests the concept of aggregating the index with the established index for dynamic security inference. The aggregation concept allows individual application of each of the indexes in partial security investigations or application of both in the complete security investigations.

A novel online monitoring system of frequency oscillations based intelligence phasor measurement units

“…There is no size restriction nevertheless this requires some time field simulations to excite and differentiate all between the region's modes in the network [13]. Now that technology has advanced using everything necessary to make the power system a perfect system, therefore, the development of on line monitoring system has developed very important and useful to provide this goal [14], [15].…”