Instantaneous Relaxation-Based Real-Time Transient Stability Simulation

• Published in: IEEE transactions on power systems Vol. 24; no. 3; pp. 1327 - 1336
• Main Authors: Jalili-Marandi, V., Dinavahi, V.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Assessments; Computation; Computational modeling; Computer programs; Computer simulation; Differential equations; Discrete event simulation; Iterative methods; Mathematical analysis; Mathematical models; Nonlinear equations; parallel algorithms; Power system security; Power system simulation; Power system stability; power system transient stability; Power system transients; Real time; Real time systems; relaxation methods; Time domain analysis; Transient stability
• ISSN: 0885-8950; 1558-0679
• DOI: 10.1109/TPWRS.2009.2021210

Real-time transient stability simulation is of paramount importance for system security assessment and to initiate preventive control actions before catastrophic events such as blackouts happen. Transient stability simulation of realistic power systems involves the solution of a large set of nonlinear differential-algebraic equations in the time-domain which requires significant computational resources. Exploitation of parallel processing techniques can provide an efficient and cost-effective solution to this problem. This paper proposes a fully parallel method known as instantaneous relaxation (IR) for real-time transient stability simulation. To validate the proposed method, two test systems have been implemented on an advanced PC-cluster-based real-time simulator. A comparison of the captured real-time results with those from the PSS/E software shows high accuracy.