"Our engineers are working on a self-limiting, high-temperature superconductor technology which would stop and prevent power surges generated anywhere in the system from spreading to other substations."
This is a superconducting fault current limiter. During normal operation the superconductor presents very little resistance; during fault conditions the high current (mega-amps) causes a magnetic field that causes the superconductor to stop superconducting, the resistance goes up and the fault current is quenched.
Fault limiting inductors using the high di/dt of a fault have been installed in electrical distribution networks for very many years. Along with proper circuit protection ( voltage transformers, current transformers, trip relays and circuit breakers), investment and people who know what they are doing (correct fault discrimination settings on your protection system), most networks can be made robust. However the real test is to trip the breaker and see whether the system works correctly. People are reluctant to do this. They are also reluctant to spend money when the lights are on, to make sure that they stay on.