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This paper presents general logic and a computational procedure for incorporating phase shifter control into the on-line energy control ceter computer operations of bulk power systems. Optimum phase shifter angle (tap setting) adjustments are determined on-line to alleviate present (real-time) system overloads and future contingency overloads without overloading the present (precontingency) system. As few phase shifters as possible are adjusted to eliminate the overloads. Phase shifter distribution factors are the basis of tnis phase shifter control procedure and two methods of calculating these factors are developed. In order to realize system economic benefits, phase shifter control adjustments are made prior to established generation megawatt shift procedures in an effort to eliminate system overloads.
Thanikachalam et al. (Sun,) studied this question.