The interaction between a fault arc and power system has a big influence on the successful reclosing of a faulted system and hence evaluation of this interaction is very important. This paper mainly focuses on a proposed technique of simplified arc model for evaluation of single phase reclosing scheme for extra high voltage transmission system. Both primary and secondary arcs behavior have been...

Axial Magnetic Field (AMF) is widely used in vacuum interrupters to keep the arc in the diffused mode. With increasing axial magnetic field, the multiple arc mode extends to higher arc currents. In this mode of arc, the fault current can be easily interrupted due to fast recovery of the diffused vacuum arc. The magnetic field amplitudes considered in the preceding studies are all less than hund...

Parallel computing on interconnected workstations is becoming a viable and attractive proposition due to the rapid growth in speeds of interconnection networks and processors. In the case of workstation clusters, there is always a considerable amount of unused computing capacity available in the network. However, heterogeneity in architectures and operating systems, load variations on machines,...

This paper presents an algorithm for adaptive determination of the dead timeduring transient arcing faults and blocking automatic reclosing during permanent faults onoverhead transmission lines. The discrimination between transient and permanent faults ismade by the zero sequence voltage measured at the relay point. If the fault is recognised asan arcing one, then the third harmonic of the zero...

1. Executive Summary Arc fault current interruption (AFCI) is required on DC conductors of solar PV installations by NEC 2011 (rooftop systems only) and NEC 2014 (rooftop and ground mount systems). To meet these requirements, combiner boxes for central inverters will need to include arc fault detectors (AFDs) as well as other AFCI equipment. UL recognized AFDs greatly ease the process of listin...

In a PV system, DC arc is regarded as a serious fault, which might cause circuit damage and trigger fires. The arc fault, however, is hard to detect due to the special fields of photovoltaic systems: constant direct current without zerocrossing point, sophisticated components leading to noise interruption, and usually occupying large area. Therefore, detectable characteristics are of great impo...

This paper presents a method to limit the arc energy and hence hazard risk category value according IEEE 1584 by using system of two oppositely connected multi-sectional thyristor branches. A test circuit for testing effectiveness eliminator was designed constructed. Arc ignition inside electrical switchgear can be source danger technical personnel. The calculated algorithms in significantly re...

V. P. Karasyov, P. V. Kovalev, A. Z. Issagulov, V. Yu. Kulikov, Y. P. Chsherbakova. Saint-Petersburg State Polytechnic University, SaintPetersburg, Russia, Karaganda State Technical University, Karaganda, Kazakhstan There is considered the power operating mode of a high-power arc steelmaking furnaces (ASMF) in the period of the flat bath. It is revealed that electric energy is mainly spent for ...