Power/energy: System security: The computer's role: Several security-related functions can be aided by the digital computer, and linked together by a software scheme

Can computers in power-system control centers prevent blackouts? The answer is yes — and no. Apparently they cannot control a power system so that it will not become unstable. However, they can provide substantial help to the human who is operating the system. In addition to their contributions to various operational functions (see box on p. 50), computers assist the operators in preserving the system's security — its freedom from danger or risk.