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In the analysis of short transmission lines, which of the following is neglected?
  • a)
    I2R loss
  • b)
    Shunt capacitance
  • c)
    Series impedance
  • d)
    All of the above
Correct answer is option 'B'. Can you explain this answer?
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In the analysis of short transmission lines, which of the following is...
The transmission lines which have length less than 50 km are generally referred as short transmission lines.
For short length, the shunt capacitance of this type of line is neglected and other parameters like electrical resistance and inductance are lumped
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In the analysis of short transmission lines, which of the following is...
Shunt capacitance is neglected in the analysis of short transmission lines
Short transmission lines are typically a few kilometers in length, and the voltage and current along the line do not vary significantly over this distance. When analyzing short transmission lines, certain parameters can be neglected to simplify calculations. One of the parameters that is often neglected is shunt capacitance.

Reasons why shunt capacitance is neglected in the analysis of short transmission lines:
- Low impact on line behavior: In short transmission lines, the shunt capacitance typically has a minimal effect on the overall line behavior. Since the line length is short, the capacitive reactance is relatively low compared to other parameters such as series impedance.
- Negligible charging current: The shunt capacitance of a short transmission line results in a small charging current, which can be disregarded in many cases. This simplifies the analysis of the line and allows for easier calculations.
- Focus on dominant parameters: In the analysis of short transmission lines, the focus is often on the dominant parameters such as series impedance and resistance, which have a more significant impact on line performance. By neglecting the shunt capacitance, engineers can streamline their calculations and still achieve accurate results.
Overall, while shunt capacitance is an important parameter in long transmission lines and high-frequency applications, it can be neglected in the analysis of short transmission lines due to its minimal impact on line behavior and the focus on more dominant parameters.
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it depends on the length of the conductor the capacitance of the line is proportional to the length of the transmission line their effect is negligible on the performance of short having a length less than 80 km and low voltage transmission accidents of the transmission line along with the conductances forms the shunted mittens the conductance and the transmission line is because of the leakage over the surface of the conductor considered a line consisting of two conductors and be each of radius are the distance between the conductors being Des shown in the diagram below minus the potential difference between the conductors and via's work QA charge on conductor QB charge on conductor vvab pencil difference between conductor and the Epsilon minus absolute primitivity QA plus QV = 0 so that QA equals QB - equals DBA equals data equals DB equals our substituting these values and voltage equation we get the capacitance between the conductors is cab is referred to as lying to line capacitance if the two conductors are in VR oppositely charge then the potential difference between them is zero then the potential of each conductor is given by one half bath the capacitance between each conductor and point of zero potential and is capacitive CN is called the capacitance to neut or capacitance to ground capacitance cab is the combination of two equal capacity and VN series thus capacitance to neutral is twice the capacitance between the conductors IE CN equals to Cave the absolute primitivity Epsilon is given by Epsilon equals epsilono Epsilon are where epsilano is the permittivity of the free space and Epsilon or is the relative primitivity of the medium prayer capacitance reactants between one conductor and neutral capacitance of the symmetrical three phase line let a balanced system of voltage be applied to a symmetrical three-phase line shown below the phasor diagram of the three phase line with equilateral spacing is shown below take the voltage of conductor to neutral as a reference phaser the potential difference between conductor and we can be written the similarly potential difference between conductors and sea is on adding equations one and two we get also combining equation three and four from equation 6 and 7 the line to neutral capacitance the capacitance of symmetrical three phase line is same as that of the two wire line Related: Capacitance of Transmission Lines?

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In the analysis of short transmission lines, which of the following is neglected?a)I2R lossb)Shunt capacitancec)Series impedanced)All of the aboveCorrect answer is option 'B'. Can you explain this answer?
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