Error Adaptive Control Computer for Interconnected Power Systems

The error adaptive control computer (EACC) permits new and different degrees of freedom for automatic control. It is a logic computer which monitors the control error signal and makes logical decisions on how much, if any, control action should be taken depending on the characteristics of the error signal. Control action may be reduced to any judiciously chosen minimum by adjusting the EACC to discriminate against certain classes of disturbance, e.g., statistical, deterministic, and periodic. Fast control action may still be taken for large and/or sustained disturbances. Certain compromises may be necessary when the EACC is used; in particular, the error signal may be slightly increased. However, the EACC tends to hold the integrated error within a specified value by the action of its integrating circuit. The EACC lends itself to execution by either a special-purpose analog device or a digital computer program. An analog version of the EACC has been constructed and tested both in the field and by simulation.