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?
- please solve for nodal stress method. (if it is possible to apply supernodes)a) Explain the construction of LVDT. Identify some suitable examples according to their applications.b) Discuss contacting and non-contacting tachometers.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.
- 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 52400Ω 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?