電圧安定度を維持するための無効電力補償システムの一提案

抄録

In this paper, a method of reactive power compensation to prevent voltage instability is proposed. The proposed method of reactive power compensation maximizes the static power transfer capability under given short circuit current constraints. The concept of voltage-ideal power system (ideally voltage regulated system) is first introduced in which all node voltages are kept constant by powerful voltage regulators such as SVCs and synchronous condensers. This system is absolutely free from voltage instability, but its short circuit capacity becomes very large and a large amount of reactive power has to be supplied in order to keep all node voltages constant.
To meet the practically levels of the reactive power requirement and short circuit current capacity, the quasi voltage-ideal regulated system is next discussed. This system is obtained by carefully choosing a limited number of nodes to be kept voltage constant in order to maximize the active power transmission capacity with a reasonable reactive power requirement without exceeding specified short circuit capacity level.