Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
For transmission of power over a distance of 200 km, the transmission voltage should be
66 kV
132 kV
11 kV
33 kV
132 kV
For a transmission distance of 200 km, the voltage level is typically categorized under medium-to-long transmission lines. According to empirical rules (Still's rule), transmission voltage is directly proportional to distance and power load to minimize ohmic losses (I2R) and voltage drop, making 132 kV the standard industrial selection for this range.
For a transmission distance of 200 km, the voltage level is typically categorized under medium-to-long transmission lines. According to empirical rules (Still's rule), transmission voltage is directly proportional to distance and power load to minimize ohmic losses (I2R) and voltage drop, making 132 kV the standard industrial selection for this range.
VkVтАЛтЙИ5.51.6LтАЛ+150PтАЛтАЛ тАФ Empirical formula for line voltage selection
PlossтАЛ=I2R=(3тАЛVcos╧ХPтАЛ)2R тАФ Relationship between voltage and line losses
The selection of transmission voltage follows the rule of thumb: VkVтАЛтЙИ5.51.6LтАЛ+1503PтАЛтАЛ, where L is distance in km and P is power in MW. Higher voltages reduce the current required for a specific power level, thereby reducing I2R line losses, decreasing conductor material weight (cross-section area), and improving voltage regulation.
Transmission voltage depends on the power to be transmitted and the length of the line.
Higher voltage reduces current, which minimizes copper loss (I2R).
Transmission for 200 km is typically classified as a medium transmission line (80 km to 200 km).
132 kV is a standard high-voltage level for regional bulk power transmission in India.
Reduced line losses
Better voltage regulation
Lower conductor volume required
Increased transmission capacity
Higher insulation costs
Increased corona loss at very high voltages
Higher cost of transformers and switchgear
Regional grid interconnection
Sub-transmission to load centers
11 kV is typically used for primary distribution.
33 kV and 66 kV are common for sub-transmission or short-distance transmission.
The range of 100-250 km is the sweet spot for 132 kV systems in terms of economic viability.
B is correct тАФ 132 kV is the standard voltage level optimized for the technical and economic requirements of transmitting power over a 200 km distance.
Always remember that for transmission voltage, as the distance increases, the voltage must increase to maintain a reasonable percentage of voltage drop and to ensure economic conductor utilization.