DocumentCode :
807371
Title :
A decoupled time-domain Simulation method via Invariant subspace partition for power system analysis
Author :
Yang, Dan ; Ajjarapu, Venkataramana
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Volume :
21
Issue :
1
fYear :
2006
Firstpage :
11
Lastpage :
18
Abstract :
A decoupled method is proposed to deal with time-domain simulation for power system dynamic analysis. Traditionally, there are two main categories of numerical integration methods: explicit methods and implicit methods. The implicit methods are numerically stable but require more computational time to solve the nonlinear equations, while explicit methods are relatively efficient but may cause a numerical stability problem. This paper proposes a new hybrid method to take advantage of both explicit and implicit methods based on the invariant subspace partition. The original power system equations are decoupled into two parts that correspond to the stiff and nonstiff subspaces. For the stiff invariant subspace, the implicit method is applied to achieve numerical stability, and the explicit method is employed to handle nonstiff invariant subspace for the computational efficiency. As a result, the new hybrid method is both numerically stable and efficient. The approach is demonstrated through New England 39-bus and IEEE 118-bus systems.
Keywords :
integration; nonlinear equations; numerical stability; power systems; time-domain analysis; IEEE 118-bus systems; New England 39-bus systems; decoupled time-domain simulation method; hybrid method; invariant subspace partition; nonlinear equations; numerical integration methods; numerical stability problems; power system dynamic analysis; Analytical models; Computational modeling; Hybrid power systems; Nonlinear equations; Numerical stability; Power system analysis computing; Power system dynamics; Power system simulation; Power system stability; Time domain analysis; A-stability; decoupled method; differential and algebraic equations (DAE); dynamical simulation; explicit methods; implicit methods; invariant subspace partition; power systems; stiff systems; time-domain simulation;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/TPWRS.2005.860937
Filename :
1583693
Link To Document :
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