Unit controller for multiple-unit dispatch control

A control system for controlling the distribution of load among a plurality of generators to be regulated, said plurality including both fast and slow responding units, comprising:

• a source of first signals representative of the desired generation established for each of the units in accordance with an economic division of the total load in the area supplied by said plurality of generators;
• means for providing a second signal for each of said plurality of generators which is indicative of the output of the generators;
• means for producing for each slow responding generator of said plurality a third signal which is a function of a quantity indicative of the actual generation, said function being expressable by the Laplace transform ##EQU5## means for producing a unit error signal representing a predetermined fraction of an area control error, said fraction representing the units' share in the regulation of the area;
• means for modifying said unit error signal in accordance with the difference between the first and second signals plus the third signal;
• and
• control means responding to the unit error signal as modified for changing the generation of said units to provide an economic dispatch of the load and assistance in its regulaton.