Question

QUESTION 4 [30 MARKS] As an undergraduate student in electrical engineering engaged in an internship at a prominent power transmission facility in Pekan, Pahang, you are confronted with a real-world challenge involving a three-phase transmission line. The transmission line, vital for the region's electricity distribution, is characterized by the following parameters: - Resistance: 0.153 $\Omega$ per km - Inductance: 1.21 mH per km - Capacitance: 0.00958 $\mu$F per km - Conductance: G=0.0 With a span of 100 kilometers and a frequency of 50 Hz, the transmission line is tasked with delivering 20 MW of power at a line voltage of 110kV. The power factor, a crucial aspect in power transmission, is measured at 0.9 lagging. Your objective is to apply the nominal pi-representation in a real-world context: i) Calculate the sending end voltage ($V_s$) and current ($I_s$) for the transmission line, taking into account the transmission of 20 MW over its 100 km length. ii) Analyze and determine the sending end power factor, reflecting the practical conditions and requirements of the transmission line. iii) Assess the percentage of voltage regulation to understand how effectively the transmission line adapts to dynamic power demands in the real-world operational environment. iv) Evaluate the efficiency of the transmission line, providing insights into its real-world performance in delivering power across the entire 100 km distance. [30 Marks] [CO2, PO2, C4]

          QUESTION 4 [30 MARKS]
As an undergraduate student in electrical engineering engaged in an internship at a prominent
power transmission facility in Pekan, Pahang, you are confronted with a real-world challenge
involving a three-phase transmission line. The transmission line, vital for the region's electricity
distribution, is characterized by the following parameters:
- Resistance: 0.153 $\Omega$ per km
- Inductance: 1.21 mH per km
- Capacitance: 0.00958 $\mu$F per km
- Conductance: G=0.0
With a span of 100 kilometers and a frequency of 50 Hz, the transmission line is tasked with
delivering 20 MW of power at a line voltage of 110kV. The power factor, a crucial aspect in
power transmission, is measured at 0.9 lagging.
Your objective is to apply the nominal pi-representation in a real-world context:
i) Calculate the sending end voltage ($V_s$) and current ($I_s$) for the transmission line, taking into
account the transmission of 20 MW over its 100 km length.
ii) Analyze and determine the sending end power factor, reflecting the practical conditions
and requirements of the transmission line.
iii) Assess the percentage of voltage regulation to understand how effectively the transmission
line adapts to dynamic power demands in the real-world operational environment.
iv) Evaluate the efficiency of the transmission line, providing insights into its real-world
performance in delivering power across the entire 100 km distance.
[30 Marks]
[CO2, PO2, C4]

QUESTION 4 [30 MARKS]
As an undergraduate student in electrical engineering engaged in an internship at a prominent
power transmission facility in Pekan, Pahang, you are confronted with a real-world challenge
involving a three-phase transmission line. The transmission line, vital for the region's electricity
distribution, is characterized by the following parameters:
- Resistance: 0.153 Ω per km
- Inductance: 1.21 mH per km
- Capacitance: 0.00958 μF per km
- Conductance: G=0.0
With a span of 100 kilometers and a frequency of 50 Hz, the transmission line is tasked with
delivering 20 MW of power at a line voltage of 110kV. The power factor, a crucial aspect in
power transmission, is measured at 0.9 lagging.
Your objective is to apply the nominal pi-representation in a real-world context:
i) Calculate the sending end voltage (Vs) and current (Is) for the transmission line, taking into
account the transmission of 20 MW over its 100 km length.
ii) Analyze and determine the sending end power factor, reflecting the practical conditions
and requirements of the transmission line.
iii) Assess the percentage of voltage regulation to understand how effectively the transmission
line adapts to dynamic power demands in the real-world operational environment.
iv) Evaluate the efficiency of the transmission line, providing insights into its real-world
performance in delivering power across the entire 100 km distance.
[30 Marks]
[CO2, PO2, C4]

Added by Mariano A.

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