A Novel Real-Time Algorithm for Torsional Vibration Mode of Generator Sets Based on Rotation IIR Filter

Abstract:

The shafting torsional vibration mode of generator sets reflects dynamic process of the power grid. This paper proposes a novel real-time algorithm for shafting torsional vibration mode decomposition of generator sets, which has excellent time-frequency resolution. The algorithm realizes the signal frequency resolution filtering based on classic infinite impulse response (IIR) filtering. At the same time, the inertia of the narrow-band filtering algorithm is eliminated through multi-period rotation IIR filtering and the time-frequency dynamic resolution of the modal decomposition is realized. PSCAD-based simulation verifies that the algorithm has the frequency anti-aliasing performance, and can fully reserve the time-frequency variation characteristics and can realize the multi-mode real-time decomposition of the torsional vibration perfectly. The algorithm can also be used for the time-frequency analysis in other fields.

• Periodical: Applied Mechanics and Materials (Volumes 215-216)
• Pages: 1253-1258
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.215-216.1253
• Online since: November 2012
• Authors: Juan Li, Yuan Hong Yang, Shao Hua Jiao
• Keywords: Generator Sets, Rotation IIR Filter, Torsional Vibration Mode

References

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