Model-in-the-Loop Testing of Flexible-Bus Conductors Interconnecting Substation Equipment
Kote, Vivek Bhaskar
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Seismic performance of electrical substation equipment is of paramountimportance to avoid power outages and economic losses, and to ensureefficient post-earthquake response. Significant progress had been madetowards improving seismic performance of such equipment through thedevelopment of recommended practices for design, such as IEEE 693 and IEEE 1527,and by implementation of seismic protective systems such as base isolation.However, there are still unresolved questions pertaining to dynamicresponse of substation equipment, one of which is the influenceof interconnection through flexible bus conductors.Dynamics of flexible conductors are highly nonlinear, and not well understood.Current recommended design practices to account for interactionare therefore developed to be very conservative,and often become impractical for the power industry to follow.This work is part of a larger project aimed at quantifyingflexible conductor dynamics and interaction of interconnected equipment.The scope of this work, within the larger project,is to develop a model-in-the-loop (MIL) test systemto represent substation equipment interconnected by flexible conductors.The conductor is tested physically, while the equipmentare represented by computer models running in real-time.The interface conditions are enacted by a specially-designedequipment simulation. The main contribution of this workis application of a new algorithmic approachthat makes such a test system feasible.MIL enables performing an extensive parametric studyby varying dynamic characteristics of equipment,so that mathematical models of conductor nonlinear dynamics can bevalidated over a broad range of conditions.