Suppression of numerical oscillations in the EMTP

Journal Article · Mon May 01 04:00:00 EDT 1989 · IEEE Trans. Power Syst.; (United States)

DOI:https://doi.org/10.1109/59.193849· OSTI ID:6199260

Marti, J R; Lin, J

The integration scheme in the Electromagnetic Transients Program EMTP has been modified to solve the problem of sustained numerical oscillations that can occur when the trapezoidal rule has to act as a differentiator. These oscillations appear, for instance, on the voltage across an inductance after current interruption. The technique presented in this paper prevents these oscillations by providing critical damping of the discontinuity within one ..delta..t of the simulation. The critical damping adjustment (CDA) is achieved by means of two ..delta..t/2 integration steps using the backward Euler rule. With the CDA scheme the trapezoidal rule can still be used throughout the entire simulation without the problem at discontinuities. The effectiveness of the new scheme is illustrated with simulation results.

• Research Organization: The Univ. of British Columbia, Vancouver, B.C. (CA); Electric Power Research Institute, Beijing (CN)
• OSTI ID: 6199260
• Journal Information: IEEE Trans. Power Syst.; (United States), Journal Name: IEEE Trans. Power Syst.; (United States) Vol. 4:2; ISSN ITPSE
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
296000* -- Energy Planning & Policy-- Electric Power
99 GENERAL AND MISCELLANEOUS
990230 -- Mathematics & Mathematical Models-- (1987-1989)
DAMPING
ELECTROMAGNETIC FIELDS
NUMERICAL SOLUTION
OSCILLATIONS
SIMULATION
TRANSIENTS