Numerical Oscillations in Electromagnetic Transients Programs
نویسنده
چکیده
The Electromagnetic transients progr am and its variants all use the “trapezoidal rule” numerical integration method. The trapezoidal rule is a second order numerical integration technique that is simple to implement. However, it is also susceptible to numerical oscillations when differentiat ing step changes in voltage and current. The program user should be aware of the potential for these oscillations when simulating circuits and systems using EMTP or EMTDC. These oscillations appear, for instance, on the voltage across an inductance after current interruption. The paper presents these oscillations that could occur in EMTP and EMTDC and some options to eliminate them.
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