Simulation of effect of breakers short circuit test on system voltage

The effectsof thecircuit breaker's shortcircuittests performedatEPRI High-power laboratory on system voltagesare analyzed.Thecurrentoftheshort circuit is 50 kA.With MATLAB/Simulink software,thebus voltage variation states in interrupting tests are simulated.The simulation results indicate that in the maximum operating mode,the impact on the system is small,while in the minimum operating mode,the three phase short circuit tests of circuit breakers manifest an obvious impact on the bus voltages.