Comparative engineering analysis demonstrates effective voltage regulation via underexcited turbine-generators in lightly loaded systems, highlighting an alternative to shunt reactors.
Two methods are discussed for controlling line-charging kilovars and voltages on a lightly loaded 345-kv system. One method utilizes shunt reactors while the other takes advantage of underexcited capabilities of modern turbine-generators utilizing appropriate control. The conclusion, supported by experience, favors the underexcited operation in this situation
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Kekela et al. (1963) studied this question.
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