39. The impedance of a transmission line is 30 ohm. What is the per unit impedance of 115 kv and 100 MVA base? O 0.18 O 0.05 O 0.03 O 0.22
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- With generator conyention, where the current leaves the positive terminal of the circuit element, if P is positive then positive real power is delivered. (a) False (b) TrueConsider a long radial line terminated in its characteristic impedance Zc. Determine the following: (a) V1/I1, known as the driving point impedance. (b) | V2 |/V1|, known as the voltage gain, in terms of al. (c) | I2 |/| I1 |, known as the current gain, in terms of al. (d) The complex power gain, S21/S12, in terms of al. (e) The real power efficiency, (P21/P12)=, terms of al. Note: 1 refers to sending end and 2 refers to receiving end. (S21) is the complex power received at 2; S12 is sent from 1.Determine the per unit impedance of a transmission line having an impedance of 30 + j110 Ω on 100 MVA and 132 kV base voltage.
- 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.Calculate the input impedance of the transmission lines given in the figure1. What are the applications for stripline and microstrip transmission lines? 2. Give 2 examples of characteristic impedance application for each stripline and microstrip transmission lines.
- estimate the distance over which the load of 15000 KW at 0.85 power factor can be delivered by a three phase transmission line having conductors of Steel coated aluminium each of resistance 0.905 ohm per face per kilometre the voltage of the receiving end is to be 132 KV and the losses in transmission is to be 7.5 % of a loadQ#4: What is the purpose of an overhead transmission line? How are these lines classifiedDo the majority of electricity network losses occur in transmission networks (e.g. >69 kV in North America) or distribution networks (<69 kV)? Why is this the case?
- A high voltage DC transmission line delivers 1000 MW at 500 kV to an aggregate load over a distance of 900 km. Determine the voltage at the sending end. Assume the loop resistance of the line to be 1mΩA 120 MVA, 19.5 kV generator has Xs = 0.15 per unit and is connected to a transmission line by a transformer rated 150 MVA, 230 Y/18Δ kV with X = 0.1 per unit. If the base to be used in the calculation is 100 MVA, 230 kV for the transmission line, find the per unit values to be used for the transformer a. 0.06667 b. 0.1467 c. 0.05 d. 0.0405The base current and base voltage of a 345 kV system are chosen to be 3000A and300kV respectively. Determine the base impedance and the per-unit voltage for thesystem.