1. 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.
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1. 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.
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- To convert a per-unit impedance from old to new base values, the equation to be used is Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)Zp.u.new=Zp.u.old(VbaseoldVbasenew)2(SbasenewSbaseold)In a string of suspension insulator with three units, the line unit has 20kV and k=0.35. The voltage across tower unit is........ and across middle unit is.......What is a FACTS (Flexible Alternating Current Transmission System) device, and how does it impact power system operation?
- Consider a 3-phase, 50 HZ, 11 KV distribution system. Each of conductors is suspended by an insulator string having two identical porcelain insulators. The self-capacitance of the insulator is 5 times the shunt capacitance between link and ground. Find the voltages across two insulators.please solve for nodal stress method. (if it is possible to apply supernodes)1. FIGURE 52 shows the one-line diagram of a simple three-bus power system with generation at bus I. The voltage at bus l is V1 = 1.0L0° per unit. The scheduled loads on buses 2 and 3 are marked on the diagram. Line impedances are marked in per unit on a 100 MVA base. For the purpose of hand calculations, line resistances and line charging susceptances are neglected a) Using Gauss-Seidel method and initial estimates of Va 0)-1.0+)0 and V o)- ( 1.0 +j0, determine V2 and V3. Perform two iterations (b) If after several iterations the bus voltages converge to V20.90-j0.10 pu 0.95-70.05 pu determine the line flows and line losses and the slack bus real and reactive power. 2 400 MW 320 Mvar Slack 0.0125 0.05 300 MW 270 Mvar FIGURE 52
- a) Explain the construction of LVDT. Identify some suitable examples according to their applications.b) Discuss contacting and non-contacting tachometers.400Ω A k=0.9 600Ω B k=0.8 66Ω 600ΩExplain the concept of FACTS (Flexible AC Transmission Systems) devices in power systems. How do they enhance the controllability and stability of electrical grids? Provide examples of FACTS devices.
- What is load curveIn an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 15kV and that across the next unit is 12kV. Estimate: i. ratio of mutual to self-capacitance ii. the bus-bar voltage of the substation. iii. Efficiency across the string of insulatorsQ3: A synchronous generator with peak generated voltage Vg which is connected to a lighting arrester through a transmission line with characteristics impedance ZL and the lighting arrester equal to the one half of ZL. Let the generator characteristic impedance be one third of ZL. Determine:(i) Calculate the current in the lighting arrester, (ii) Calculate the voltage in lighting arrester, and (iii) the value of lighting arrester resistance must be connected to transfer maximum power?