Extended-term dynamic simulation using variable time step integration
Numeric simulation of power systems over extended periods of time is an important problem of current interest. This interest is motivated by the trend among utilities to increase power transfers on critical transmission corridors. This trend can lead to the operation of power systems under conditions for which they were not originally designed, or beyond their original design limits, and can create serious performance problems. Some of these problems develop over periods of time much longer than those associated with typical transient stability studies. This article illustrates the application of a new Extended Time Scale Stability Analysis program (EXSTAB), developed for the numerical simulation of power system phenomena spanning time periods from several seconds to several hours and involving slow events such as load cycles, as well as fast transients, such as line trips. The integration algorithm in this program automatically reduces the time step of integration to capture fast transients decay. The algorithm is based on the simultaneous solution of the differential and algebraic equations describing a power system, using a numerically stable, implicit, low-order integrator similar to the trapezoidal rule.
- OSTI ID:
- 5529139
- Journal Information:
- IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Power Systems (Institute of Electrical and Electronics Engineers); (United States) Vol. 8:3; ISSN ITPSEG; ISSN 0885-8950
- Country of Publication:
- United States
- Language:
- English
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