Estimate and costing for installing 11KV transmission line
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- Transmission line conductance is usually neglected in power system studies. True FalseThe following parameters are based on a preliminary line design: per unitVS=1.0, VR=0.9 per unit, =5000km,Zc=320,=36.8. A three-phase power of 700 MW is to be transmitted to a substation located 315 km from the source of power. (a) Determine a nominal voltage level for the three-phase transmission line, based on the practical line-loadability equation. (b) For the voltage level obtained in part (a), determine the theoretical maximum power that can be transferred by the line.d) Calculate the per unit voltage drop on the transmission line e) Calculate also the sending end voltage Use an overall base of 100 MVA.
- iv. For a long high voltage transmission line with light loading : (a) The voltage is generally high due to reactive power generated by the line. (b) The voltage is generally high due to the light loading. (c) The voltage is generally high due to high reactive power generated and the low reactive power consumed by the line.Q1/ Explain in detail VOLTAGE DROP / RISE IN TRANSMISSION LINE With mathematical examplesI) Determining the voltage amplitude and angle values of each busbar II) To determine the active and reactive power values flowing from each transmission line III) To determine the active and reactive power loss values in each transmission line IV). Determining the total active and reactive power loss values in transmission lines in the power system V) To determine the power system temporary stability limit values To explain the reasons for load flow in power systems given above, which option is the correct one of the 5 explanations given? A) II,III,IV B) I,II C) I,II,III D) I,IV E) I,II,IV
- a) The Newmont Mining Company at Ahafo in the Bono region of Ghana requested a dedicated power supply line from Kumasi in the Ashanti region of Ghana to feed its mining roller mills. The World Bank helped the Government of Ghana to fund the project. A company won the bid and came up with the design specifications as follows:The system would be a three-phase 138-KV transmission line and the total power to be connected to the line is 49-MV and would be operating at a 0.85 lagging power factordue to the large rotating motors in the roller mills. The line constants would have lengthof 120km long line with Z = 95∟78ºΩ and Y = 0.001∟90ºS. They are proposing to use nominal -T circuit representation in their analysis. If they are to provide:(i) The A, B, C and D constants of the line. (ii) The voltage from Kumasi to the NewmontWhat are the values you think the company that won the bid would provide? b) Using the information provided in a) above, Newmont Mining Company wants to know:(i) The…a) The Newmont Mining Company at Ahafo in the Bono region of Ghana requested a dedicated power supply line from Kumasi in the Ashanti region of Ghana to feed its mining roller mills. The World Bank helped the Government of Ghana to fund the project. A company won the bid and came up with the design specifications as follows:The system would be a three-phase 138-KV transmission line and the total power to be connected to the line is 49-MV and would be operating at a 0.85 lagging power factor due to the large rotating motors in the roller mills. The line constants would have length of 120km long line with Z = 95∟78ºΩ and Y = 0.001∟90ºS.They are proposing to use nominal -T circuit representation in their analysis. If they are to provide:(i) The A, B, C and D constants of the line.(ii) The voltage from Kumasi to the NewmontWhat are the values you think the company that won the bid would provide?b) Using the information provided in a) above, Newmont Mining Company wants to know:(i) The…Problem 1 a- Explain the meaning of the term "bundle conductor transmission line" and discuss the effects of its use on the electrical performance of a high voltage electric transmission line. b- Consider an experimental 1800 kV three phase bundle-conductor line with parameters A= 0.95 and B=j 70. Determine the value of the parameter C of the line. Assume that the line is delivering 2,000 MVA at receiving end whose voltage of 1750 kV and unity power factor. Determine the sending end voltage of the line. d- C- Determine the sending end current of the line.
- 3 Two units of generation maintain 132 kV and 120 kV (line) at the ends of an interconnector of inductive reactance per phase of 40V and with negligible resistance and shunt capacitance. A load of 22 MW is to be transferred from the 132 kV unit to the other end. Calculate the necessary conditions between the two ends, including the power factor of the current transmitted.Outline the drawbacks and the advantages of six-and twelve phase transmission lines configarations.2- i. Answer the questions considering Turkish electricity system. Single phase voltage in residential customers: Three phase voltage in industrial facilities: Transmission line voltage levels: Frequency: Total installed capacity of Turkey in March 2021: Total length of transmission line of Turkey in 202o: volt volt kv, kV, kV, kV Hz MW km ii. What can be the disadvantages if we see 15 volts on the neutral wire? ili. What happens if we have no ground wire in our houses? Iv. What is the difference between installed power and demand power?