Application of the Digital Simulation of Power Swing for Protection Relay Testing

On the basis of forming a frequency mathematical model of power source when the systemoscillation occurs,by utilizing the EMTP,the results of electrical parameters at the time of system oscillation in every operation condition have been calculated. By inputing these results into the F2250computer protection relay testing equipment,the results have been converted into the analog wave.This can be used into the performance testing of protection relay in the condition of system oscillation.