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Related Concept Videos

Transmission Line Design Considerations01:23

Transmission Line Design Considerations

187
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
187
Zones of Protection01:16

Zones of Protection

276
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
276
Equipotential Surfaces and Conductors01:16

Equipotential Surfaces and Conductors

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For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to equipotential surfaces. Therefore, in a conductor with static charges, the electric field just outside the conductor is always perpendicular to the conductor's surface. Any tangential component of the electric field will cause charges to move inside the conductor, which will violate the electrostatic nature of the system. In an electrostatic...
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Insulation Coordination01:23

Insulation Coordination

196
Insulation coordination is the process of matching electric equipment's insulation strength with protective device characteristics to protect the equipment against expected overvoltages. This selection is based on engineering judgment and cost. Equipment can generally withstand short-duration high transient overvoltages, but repeated tests with identical waveforms can yield inconsistent results. As a result, standard impulse voltage waveforms are used for testing, defined by specific times...
196
Line Protection with Impedance Relays01:27

Line Protection with Impedance Relays

117
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
117
Reclosers and Fuses01:26

Reclosers and Fuses

148
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
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Related Experiment Video

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Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
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Lightning Strike Protection: Current Challenges and Future Possibilities.

Markus Ostermann1, Juergen Schodl1, Peter A Lieberzeit2

  • 1CEST GmbH, Centre for Electrochemical Surface Technology, A-2700 Wiener Neustadt, Austria.

Materials (Basel, Switzerland)
|February 25, 2023
PubMed
Summary
This summary is machine-generated.

Aircraft lightning protection is less effective with lightweight composites. This review examines advanced materials like carbon, graphene, and MXenes for improved lightning strike protection solutions in aviation.

Keywords:
compositecomposite productiongraphenelightning strikelightning strike protectionnanofiller

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Area of Science:

  • Aerospace Engineering
  • Materials Science
  • Electrical Engineering

Background:

  • Airplanes face annual lightning strikes, necessitating robust protection systems.
  • Modern aircraft increasingly use lightweight composite materials to reduce carbon dioxide emissions.
  • The shift to composites diminishes the effectiveness of traditional metallic lightning strike protection.

Purpose of the Study:

  • To critically review current lightning strike protection (LSP) technologies for aircraft.
  • To assess the efficacy of carbon materials, graphene, and MXenes in LSP.
  • To identify future research avenues for advanced LSP solutions.

Main Methods:

  • Literature review of existing scientific publications and technological advancements.
  • Critical analysis of the properties and performance of carbon-based materials, graphene, and MXenes for LSP.
  • Synthesis of current research findings and identification of research gaps.

Main Results:

  • Composite materials offer reduced weight but compromised lightning strike protection efficiency.
  • Carbon materials, graphene, and MXenes show promise as advanced LSP solutions.
  • Existing technologies require further development to meet the demands of modern aircraft.

Conclusions:

  • Advanced materials like graphene and MXenes offer potential for enhanced aircraft lightning strike protection.
  • Further research is crucial to optimize these materials for effective and lightweight LSP.
  • Developing efficient LSP for composite aircraft is essential for safety and environmental goals.