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The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
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The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
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On Power Line Positioning Systems.

Lisandro Lovisolo1,2, Fernando Cruz-Roldán2, Manuel Blanco-Velasco2

  • 1Department of Electronics and Communications Engineering, Rio de Janeiro State University (UERJ), Rio de Janeiro 999074, Brazil.

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Summary
This summary is machine-generated.

This study explores using existing power line infrastructure for positioning. It reviews methods for power line positioning systems (PLPS) and how power line communication (PLC) can enable this emerging technology.

Keywords:
positioningpower line communicationspower line positioning system

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Area of Science:

  • Electrical Engineering
  • Geomatics Engineering
  • Telecommunications

Background:

  • Ubiquitous power line infrastructure offers a potential foundation for positioning services.
  • Current positioning systems face limitations in certain environments.
  • Power Line Communication (PLC) systems are already deployed for data transmission over power lines.

Purpose of the Study:

  • To survey existing research and development in power line positioning systems (PLPS).
  • To explore the working principles and feasibility of utilizing power lines for device positioning.
  • To identify potential applications and future research directions for PLPS.

Main Methods:

  • Literature review of existing power line positioning system (PLPS) research.
  • Analysis of Power Line Communication (PLC) technologies for positioning applications.
  • Exploration of the integration of PLPS with existing power grid infrastructure.

Main Results:

  • Identified various efforts and working principles for implementing PLPS.
  • Demonstrated the potential of leveraging PLC systems for positioning.
  • Highlighted that PLPS are still in a prospective research and development phase.

Conclusions:

  • Power line infrastructure presents a promising, yet largely untapped, resource for positioning.
  • Further research and development are needed to realize the full potential of PLPS.
  • PLPS could offer novel solutions for location-based services in diverse scenarios.