Heirarchical power system control

The present status and future problems of hierarchical power system control are reviewed. Special emphasis is placed on the hierarchical structure of power system control. Power system control has been developed in close association with the progress of the power system itself. The hierarchical structure of the control system is closely connected, therefore, with that of the power system, and this structural relationship is reviewed. Motivations of using a hierarchical structure of power system control are reviewed in terms of power system control and planning. Required performances of computers installed at respective levels of hierarchical control system are discussed. Benefits resulting from the introduction of such control systems are summarized, and future problems associated with the further development of hierarchical power system control are considered.