Abstract
In recent years, there have been significant developments
in parallel algorithms and high performance parallel
computing platforms. Parareal in time algorithm has become
popular for long transient simulations (e.g., molecular dynamics,
fusion, reacting flows). Parareal is a parallel algorithm which
divides the time interval into sub-intervals and solves them concurrently.
This paper investigates the applicability of the parareal
algorithm to power system dynamic simulations. Preliminary
results on the application of parareal for multi-machine power
systems are reported in this paper. Two widely used test systems,
WECC 3-generator 9-bus system, New England 10-generator 39-
bus system, is used to explore the effectiveness of the parareal.
Severe 3 phase bus faults are simulated using both the classical
and detailed models of multi-machine power systems. Actual
Speedup of 5-7 times is observed assuming ideal parallelization. It
has been observed that the speedup factors of the order of 20 can
be achieved by using fast coarse approximations of power system
models. Dependency of parareal convergence on fault duration
and location has been observed.
