eTpPLJ-Lecture14

eTpPLJ-Lecture14 - Page 1 Fundamentals of Power Systems...

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Unformatted text preview: Page 1 Fundamentals of Power Systems Lecture 14 1 z Overhead Conductor z Overhead Spacer Cable z Underground Cable z Three-Conductor Cable z Service Cables Transmission Lines Fundamentals of Power Systems Lecture 14 2 Overhead Conductors z ACSR Aluminum Conductor with inner Steel Reinforced strands z ACAR Aluminum Conductor with inner Al-Alloy Reinforced strands (corrosion resistant) z Aluminum - current carrying member z Steel - structural support Page 2 Fundamentals of Power Systems Lecture 14 3 Overhead Cable z Where conductor close proximity is required z Insulating jacket surrounds each conductor z Plastic spacers keep conductors from coming in contact with one another Fundamentals of Power Systems Lecture 14 4 Cables Page 3 Fundamentals of Power Systems Lecture 14 5 Cables z Underground transmission and distribution cables z Semiconducting material surrounds the conductor to grade the electric field z Plastic jacket provides insulation and protection z Neutral strands for an outer shell for protection and return currents Fundamentals of Power Systems Lecture 14 6 Transmission Line Parameters z Unlike transformers and generators, transmission lines do not have nameplate data by which to construct a model for analysis z Modeling of transmission lines with: geometric data conductor distances and diameters wire data resistance and surface area z Parameters derived from modeling Resistance Self and mutual inductances Capacitances between conductors and against ground Page 4 Fundamentals of Power Systems Lecture 14 7 Resistance...
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eTpPLJ-Lecture14 - Page 1 Fundamentals of Power Systems...

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