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Transmission Line Capacitance Analysis and Example Calculations

Learn about capacitance in transmission lines, including calculations for single-phase and three-phase systems. Understand capacitance per mile and reactance calculations. Includes examples with ACSR conductors.

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Transmission Line Capacitance Analysis and Example Calculations

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  1. Power System Analysis(EELE 4351)

  2. Chapter 5 Capacitance of Transmission Lines

  3. Capacitance of Transmission LinesIntroduction

  4. Electric FieldLong Straight Conductor

  5. Potential DifferenceBetween Two Points Due to a Charge

  6. Capacitance of a Two-Wire Line Work done to move +q between a and b

  7. Capacitance of a Two-Wire LineLine-to-Line and Line-to-Neutral

  8. Transmission Lines Capacitive ReactanceACSR Conductors Tabulated Values

  9. Example 5.1 Find the capacitive susceptance per mile of a single-phase line operating at 60-Hz. The conductor is partridge, and spacing is 20 ft between centers.

  10. Capacitance of a Three-Phase LineEquilateral Spacing

  11. Capacitance of a Three-Phase LineUnsymmetrical Spacing

  12. Example 5.2 A single-circuit three-phase line operated at 60-Hz is arranged as shown. The conductors are ACSR Drake. Find the inductive reactance per mile per phase considering a completely transposed line. Find the capacitance and the capacitive reactance for 1 mi of the line. If the length of the line is 175 mi and the normal operating voltage is 220-kV, find the capacitive reactance to neutral for the entire length of the line, the charging current per mile, and the total charging megavoltamperes.

  13. Capacitance of a Three-Phase Lines Effect of Earth

  14. Capacitance of Three-Phase LineBundled Conductors

  15. Example 5.3 Each conductor of the bundled-conductor line shown is ACSR, 1272000-cmil Pheasant. Find the capacitive reactance to neutral in ohms-kilometer (and ohm-mile) per phase for d=45 cm.

  16. Capacitance of Three-Phase LinesParallel-Circuits

  17. Example 5.4 A three-phase double-circuit line ACSR is composed of 300000-cmil 26/7 Ostrich conductors arranged as shown. Find the 60-Hz inductive reactance and capacitive susceptance in ohms per mile per phase and siemens per mile per phase, respectively.

  18. End Of Chapter Five

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