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Calculate the capacitance-to-neutral in F/m and the admittance-to-neutral in S/km for the three-phase line in Problem 4.18. Also calculate the line-charging current in kA/phase if the line is 110 km in length and is operated at 230 kV. Neglect the effect of the earth plane.
A 230-kV, 60-Hz, three-phase completely transposed overhead line has one ACSR 954 kcmil conductor per phase and flat horizontal phase spacing, with 7 m between adjacent conductors. Determine the inductance in Him and the inductive reactance in ?/km.


Sagot :

The capacitance-to-neutral in F/m is 8.742 × 10⁻¹²  F/m

The admittance-to-neutral in S/km is j3.296 × 10⁻⁶  S/km

The line charging current in kA/phase if the line is 110 km in length and is operated at 230 kV, I[tex]_{chg}[/tex] = 4.814 × 10⁻¹²  kA/ Phase

What is capacitance?

A component or circuit's capacitance is its capacity to accumulate and store energy in the form of an electrical charge. The ratio of the electric charge on each conductor to the potential difference, or voltage, between them is used to express capacitance.

Farads (F), which bear the name of English physicist Michael Faraday, are the units used to measure the capacitance value of a capacitor (1791–1867).

A farad is a huge amount of capacitance. Most household electrical appliances contain capacitors that produce only a tiny amount of electricity, often a thousandth of a farad (or microfarad, or F), or as little as a picofarad (a trillionth, pF).

Learn more about capacitance

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