Multiphysics Modeling of the Dynamic Response of a Vacuum Automatic Circuit Recloser System

Abstract

This paper introduces the development of an analytical mathematical model to describe the fast dynamic response of the opening and closing mechanism of a power line recloser switch. The model is then used to simulate and evaluate the transient mechanical and electromagnetic performance during the opening and closing movements of the recloser. The simulated results are validated by measurements on an actual recloser while it operates. This model can be used to optimize the recloser design and reduce the manufacturing cost, instead of using the time-consuming finite-element analysis. Her research interests include control, design, and condition monitoring of electric machines, multiphysics modeling work of protection devices in distributed power systems, and renewable energy. J. Rhett Mayor (M'04) received the B.Sc. (Eng.) degree (cum laude), the M.Sc. (Eng.) degree with distinction in mechanical engineering, and the Ph.D. degree in mechanical engineering from the University of Natal, Durban, South Africa, in 2001.

Impact of Recloser on Protecting Blind Areas of Distribution Network in the Presence of Distributed Generation

“…The fault current seen by an OC relay decreases due to the DG contribution when the DG is located between the fault point and the OC relay. In [14][15][16], it is estimated that about 80% to 90% of faults on overhead distribution systems are temporary. Therefore, it is common practice to automatically reclose the breaker after tripping, while it remains open for a short time of typically 1 to 5 s. In some cases, utilities may reclose up to three times.…”

“…Reclosers have two basic functions in distribution systems: reliability and overcurrent protection [4]. Even though the recloser curve is slightly faster than the feeder OC relay curve, when worst-case faults are considered, it is still possible that the feeder relay to issue a trip command before the recloser does [15]. Therefore, reclosers can improve the reliability of distribution networks.…”

“…The researchers in one study [14] replaced a new solid dielectric with hydraulic reclosers and showed the benefits of this replacement. Another study [15] introduced the development of an analytical mathematical model to describe the fast dynamic response of opening and closing mechanisms of a power line recloser switch. This paper investigates the impact of reclosers on blinding areas of OC relays with DG penetration and fault impedance in a realistic distribution network data.…”