Search results for: ELECTRICAL TREES

• Inception and Propagation of Electrical Trees in the Presence of Space Charge in HVAC Extruded Cables

  Publication

  • M. A. Saleh
  • S. S. Refaat
  • M. Olesz
  • H. Abu-Rub

  - IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION - Year 2021

  This paper presents the space charge impact on the inception and propagation of electrical trees in cross-linked polyethylene (XLPE) insulation via simulations and experimentation. A 3D finite element analysis (FEA)-based modeling is proposed to simulate electrical trees via a needle embedded on the XLPE insulation. The proposed FEA model demonstrates the influence of the space charge magnitude and polarity on the initiation of...

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• Archives of Electrical Engineering

  Journals

  ISSN: 1427-4221 , eISSN: 2300-2506

• Electrical Tree Growth Behavior Under AC and DC High Voltage in Power Cables

  Publication

  • M. A. Saleh
  • S. S. Refaat
  • M. Olesz
  • H. Abu-Rub

  - Year 2021

  This work investigates the impact of an applied AC and DC high voltage on the electrical tree behavior in extruded cross-linked polyethylene (XLPE) insulation based on simulation and experimental validation. Extensive partial discharge (PD) testing methods are being implemented for high voltage cables under AC voltage for monitoring their condition. However, these PD testing methods cannot be utilized for power cables under DC...

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• Protection against electric shock in electrical installations with low voltage generating sets

  Publication

  • S. Czapp

  - Year 2005

  W referacie przedstawiono zasady ochrony przeciwporażeniowej, zgodne z wymaganiami międzynarodowymi, w sytuacji kiedy instalacja elektryczna jest zasilana z niskonapięciowych zespołów prądotwórczych. Zwrócono uwagę na dobór zabezpieczeń przeciwporażeniowych oraz na wymiarowanie uziemień.

• Poznan University of Technology Academic Journals. Electrical Engineering

  Journals

  ISSN: 1897-0737

• Paired bondage in trees

  Publication

  • J. Raczek

  - DISCRETE MATHEMATICS - Year 2008

  W pracy zdefiniowano pojęcie liczby zniewolenia parami jako moc najmniejszego zbioru krawędzi, którego usunięcie z grafu spowoduje wzrost liczby dominowania parami. W szczególności scharakteryzowane są wszystkie drzewa, w których liczba zniewolenia wynosi 0, czyli takie, w których usunięcie dowolnego podzbioru krawędzi nie zwiększy liczby dominowania parami.

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• On the partition dimension of trees

  Publication

  • J. A. Rodriguez-Velazguez
  • I. G. Yero
  • M. Lemańska

  - DISCRETE APPLIED MATHEMATICS - Year 2014

  Given an ordered partition Π={P1,P2,…,Pt} of the vertex set V of a connected graph G=(V,E), the partition representation of a vertex v∈V with respect to the partition Π is the vector r(v|Π)=(d(v,P1),d(v,P2),…,d(v,Pt)), where d(v,Pi) represents the distance between the vertex vv and the set Pi. A partition Π of V is a resolving partition of G if different vertices of G have different partition representations, i.e., for every...

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• Preserving Trees in Automata

  Publication

  • J. Daciuk

  - Year 2015

  We present a method to store additional information in a minimal automaton so that it is possible to compute a corresponding tree node number for a state. The number can then be used to retrieve additional information. The method works for minimal (and any other) deterministic acyclic finite state automata (DFAs). We also show how to compute the inverse mapping.

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• Forests Trees and Livelihoods

  Journals

  ISSN: 1472-8028

• Trees Forests and People

  Journals

  eISSN: 2666-7193