Member Member Member Consulting Engineer Bonnevi 11 e Power N . W . Power P o o l Portland, Oregon Admini s t r a t i o n Coordinatina O f f i c e Washington P o r t l a n d ,-Oregon Vancouver ~-_ _ A b s t r a c t : This paper describes an automatic generation c o n t r o l (AGC) system t h a t simultaneously reduces time e r r o r and accumulated i n a d v e r t e n t interchange energy i n interconnected power systems. This method i s automatic time e r r o r and accumulated i n a d v e r t e n t interchange r e d u c t i o n ( A I I R ) . With t h i s method c o n t r o l areas h e l p c o r r e c t t h e system time e r r o r when doing so a l s o tends t o c o r r e c t accumulated i n a d v e r t e n t interchange. Thus i n one step accumulated i n a d v e r t e n t interchange and system time e r r o r a r e c o r r e c t e d .

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