TRANSMISSION LINE REFERENCE BOOK 345 KV AND ABOVE

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Download Citation on ResearchGate | Transmission-line reference book. specific recommendations are made for insulator configurations from to kV. Transmission Line Reference Book KV and Above [Electric Research Council] on biosamnewbcropdic.ga *FREE* shipping on qualifying offers. Transmission Line Reference Book Kv and Above [J. J. LaForest] on site .com. *FREE* shipping on qualifying offers. load growth and transmission.


Transmission Line Reference Book 345 Kv And Above

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Transmission Line. Reference Book. kV and Above/Second Edition. Prepared by. Project UHV. Technical Resource Operation. Large Transformer Division. EPRI Perspective The EPRI report, Transmission Line Reference Book, kV and Above (ELR1), was originally printed with a red cover and quickly. Transmission Line Reference Book - Kv and Above Epri - Ebook download as PDF File .pdf) or read book online.

The topics for corona performance are radio noise, audible noise, and corona loss. Design charts and equations as well as their underlying technology are developed in each of these areas for both single and double circuits. Electric fields at ground level are treated in detail to support the goals of obtaining maximum field values and understanding the effects of electric fields on objects in the ROW.

Mitigation means, calculation techniques, and effects of magnetic fields are also included. For convenience, tables of conductor and bundle phase characteristics, along with electric and magnetic transmission line parameters are presented for EHV and UHV base cases.

Similar records in OSTI. GOV collections:. GOV Technical Report: Transmission-line reference book.

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Second edition. Full Record Other Related Research. LaForest, J. United States: Copy to clipboard.

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These two zones, which required both different mechanical and different electrical design considerations for the transmission line elements, were defined as follows: Zone I. The lower Salta area with altitudes ranging from approximately to m above sea level, and encompassing roughly 40km of the line.

Zone II. From Salta to the Atacama, where altitude ranges from approximately m to m above sea level covering the remaining km of the line. Electrical design The phase conductors of the transmission line had to be capable of transmitting a maximum of MVA at kV nominal voltage and m average altitude and to provide satisfactory radio interference RI , audible noise AN and corona loss performance.

Transmission Line Reference Book - 345 Kv and Above Epri 1982

To meet the necessary mechanical performance, a steel-reinforced aluminium conductor SRAC with a greased core was selected. This configuration allowed transmission of MVA under all climatic conditions while limiting the corridor with disturbed radio reception to 65 m in lower altitude regions and m in higher altitudes. The corridor with audible noise pressure levels above dBA was restricted to 65 m at lower altitudes and m in higher altitudes, while the corona loss performance was considered satisfactory.

For the earthwires, an aluminium clad steel ACS conductor with a cross section of 95 mm2 was selected for both mechanical and electrical reasons.

The differential sagging between phase conductors and earthwires ensures lower shielding angles at mid-span with mid span clearances of 10 m. Such a configuration eliminates mid-span flashovers. Insulation design The general principles of insulation design for the project were based on American standards.

Taking into consideration areas with high pollution and altitude correction factors, the leakage distance based on maximum phase-to-earth voltage rms was established as 3.

A switching impulse phase-to-earth withstand voltage of at least kV was selected.

This best matches the other insulation levels of the transmission system. The levels were adopted for the two zones are shown in Table 1.

These voltages result in minimum clearances between live and grounded parts of 4. A lightning impulse phase-to-earth withstand voltage of kV was selected. This results in a minimum clearance between live and grounded parts of 4.

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The lightning performance depends largely on the earthing resistance of the towers. The tripout rate with assumed earthing resistances of 15 V and 25 V, was calculated in the preliminary design to be 0. Soil resistivity measurements during the line survey revealed that earthing resistances of 25 V were not practically achievable.

New calculations with resistances above 25 V resulted in a predicted failure rate of 1.

The insulation leakage distance and the switching impulse insulation level govern the design of the insulation. A short duration power frequency withstand voltage of 1. Mechanical design The basic mechanical design data for the kV transmission line is shown in Table 2.

Phase conductors and earthwires The clamp component of the conductor and earthwire tensile stress should not exceed the permitted maximum tensile stress, calculated for a safety factor of 2.

The dimensions of the vibration dampers and spacer dampers were selected to assure a year life expectancy of conductors and earthwires.GOV collections: In order to meet the levels of reliability and availability necessary for the project, the physical conditions required selection of some unusual design parameters.

Thus, reducing the current by a factor of two will lower the energy lost to conductor resistance by a factor of four for any given size of conductor.

For convenience, tables of conductor and bundle phase characteristics, along with electric and magnetic transmission line parameters are presented for EHV and UHV base cases. ERA citation It also reroutes power to other transmission lines that serve local markets.

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