Question
Download Solution PDFTransmission efficiency of a transmission line increases with the _______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The 3ϕ power flowing in an overhead transmission line is given by:
where, VL = Line Voltage
IL = Line current
cosϕ = Power factor
Explanation:
1.) Power Factor: A higher power factor means less reactive power in the system, leading to reduced losses in the transmission line and hence increased efficiency.
2.) Voltage: Increasing the transmission voltage reduces the current for the same power level, which decreases the I²R losses (where I is the current and R is the resistance of the line). This also increases transmission efficiency.
3.) Current: Increasing the line current will increase the I²R losses, thus decreasing transmission efficiency.
Last updated on Jul 1, 2025
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