3 COMSOL MULTIPHYSICS OCTOBER 2018 TIPTOEING THROUGH THE TULIPS TO PROTECT POWER PLANTS Engineers at ABB are using multiphysics simulation to continuously improve the current-carrying capacity of their generator circuit breakers, protecting power plants around the world from current surges and ensuring uninterrupted generation of electricity. IN SOME WAYS power plants are the backbones of modern society. With systems as integral to technological order as these, protection against downtime is pivotal. Whether it’s a nuclear, coal-fired, or hydropower plant, they all have one insurance and protection policy in common: generator circuit breakers (GCBs). Playing a key role in power plant protection, GCBs protect plants from high surges of current (Figure 1). By interrupting potentia

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