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Note for Electrical Power Transmission And Distribution - EPTD By MD WESH KARNI

  • Electrical Power Transmission And Distribution - EPTD
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  • Veer Surendra Sai University Of Technology VSSUT -
  • Electrical Engineering
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Md Wesh Karni
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CLASS NOTES ON ELECTRICAL POWER TRANSMISSION AND DISTRIBUTION D ISCLAIMER This document does not claim any originality and cannot be used as a substitute for prescribed textbooks. The matter presented here is prepared by the author for their respective teaching assignments by referring the text books and reference books. Further, this document is not intended to be used for commercial purpose and the committee members are not accountable for any issues, legal or otherwise, arising out of use of this document. 3

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CLASS NOTES ON ELECTRICAL POWER TRANSMISSION AND DISTRIBUTION F OREWORD BY THE AUTHOR The invention of the electric lamp by Edison in the late 1870s led to rapid expansion in the use of electric power. To facilitate the electric power has to be generated and transmitted to the consumers via a transmission and distribution network. In 1882 the first electric power station Pearl street Electric station in New York city went into operation. The original electrical distribution system developed by Thomas Edison was an underground direct current (DC) system. This was followed by first ac transmission line by Westinghouse in 1886. Ferranti constructed a 10kV link from Deptford, Kent to New Bond Street in London. From the turn of the century to the late 1920s there had been a gradual increase in machine voltage up to 11kV. In 1928, the first 33kV machine was commissioned. Since then there have gradual change in technology, which has enabled the system to operate at extra high voltage 220kV, 400kVand ultra high voltage of 750kV, 1500kV. Thus the study of transmission and distribution has become very fundamental for electrical engineering students. After studying this subject, the student shall be able to address and understand the issues related to the transmission and distribution. 5

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CLASS NOTES ON ELECTRICAL POWER TRANSMISSION AND DISTRIBUTION ELECTRIC POWER TRANSMISSION AND DISTRIBUTION (3-1-0) SYLLABUS MODULE-I (10 HOURS) General Introduction to power transmission by D.C. and A.C. overhead lines Lines Constants: Resistance, inductance and capacitance of single and three phase lines with symmetrical and unsymmetrical spacing transposition, charging current, skin effect and proximity effect Performance of transmission Lines: Analysis of short, medium and long lines, equivalent circuit, representation of the lines and calculation of transmission parameters, use of static or synchronous condensers for improvement of regulation. MODULE-II (10 HOURS) Corona: Power loss due to corona, practical importance of corona, and inductive interference with neighboring communication lines, use of bundled conductors in E.H.V. transmission lines and its advantages Overhead line Insulators: Voltage distribution in suspension type insulators, method of equalizing, voltage distribution, economic use of insulators. Mechanical Design of Overhead Transmission Line, Sag and stress calculation, tension and sag at erection, effect of ice and wind, vibration dampers Under Ground Cable: Type and construction, grading of cables, capacitance in 3 core cables and dielectric loss MODULE-III (10 HOURS) Distribution System; types of distributors and feeders (radial & ring), voltage drop and load calculation for concentrated and distributed loads, Primary and secondary distribution network, Capacitor placement in distribution network, Distribution system planning, Service area calculation. MODULE-IV (10 HOURS) Substation & Earthing: Types of substations, arrangement of bus-bars and control equipments, solid earthing, resistance earthing and Peterson coil Per unit system one line diagram Power flow through transmission line, Power circle diagram, Series and shunt compensation. Introduction to Flexible AC Transmission System (FACTS), SVC, TCSC, SSSC, STATCOM and UPFC BOOKS [1]. John J Grainger, W. D. Stevenson, “Power System Analysis”, TMH Publication 7

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