Psse Software -

A massive thunderstorm was rolling toward the coastal cities. Three transmission lines were already out due to lightning strikes. Now, the system operator's voice crackled over the radio: "Unit 7 at Lakeside Plant is tripping offline in 20 minutes for emergency cooling repair."

She nodded. "PSSE validated it with full Newton-Raphson power flow. Convergence in 4 iterations. All post-contingency flows under 98%." Psse Software

Unit 7 tripped exactly on schedule. The lights in the city flickered for 0.3 seconds—and stayed on. A massive thunderstorm was rolling toward the coastal cities