Probabilistic transient stability assessment based on distributed DSA computation tool

Compared with deterministic stability assessment, probabilistic assessment can provide a more comprehensive, rational and realistic measure of system stability level and thus a deeper insight into system stability problem. However, considerable computational effort will be required to gain a reliable assessment for probabilistic analysis. This paper presents a method based on the distributed DSATools^™ to speed up the computation required. Also two instability probability indices are defined as indicators of the overall system stability level and the severity of individual component fault. The proposed method and indices are implemented on a small scale distributed computation platform consisting of 1 client and 2 servers. Simulations on the IEEE 17-machine 162-bus system have verified the feasibility of the proposed method and indices to large scale probabilistic transient stability assessment.