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- Title
Hybrid method for numerical oscillation suppression based on rational‐fraction approximations to exponential functions.
- Authors
Shu, Dewu; Xie, Xiaorong; Zhang, Shuqing; Jiang, Qirong
- Abstract
Numerical oscillation is a fatal problem caused by the trapezoidal (TR) algorithm in nodal analysis‐based electromagnetic transient (EMT) programmes. Traditional techniques of suppressing numerical oscillation involve switching among different algorithms or adding damping elements, which would undermine the flexibility and accuracy of the overall algorithm. In this study, a new algorithm based on rational‐fraction approximations to exponential functions is proposed to address the issue. Furthermore, it is combined with TR algorithm to form a hybrid method (HM) for EMT simulation. Analytical as well as numerical analyses have been conducted to compare the HM with other popular methods in terms of stability, accuracy and efficiency. The results from either theoretical analysis or case studies on an RLC circuit and a practical power system have concluded that the proposed HM gains advantages over classical methods in suppressing numerical oscillation without sacrificing accuracy and efficiency.
- Publication
IET Generation, Transmission & Distribution (Wiley-Blackwell), 2016, Vol 10, Issue 11, p2825
- ISSN
1751-8687
- Publication type
Article
- DOI
10.1049/iet-gtd.2016.0489