The time interval needed for a surge to travel to the end of a 600 km long overhead transmission line is ?
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The time interval needed for a surge to travel to the end of a 600 km long overhead transmission line is ?
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- Describe the effect of resistive load on sending and receiving end voltages, Power transferred and Power factor.2. What's the primary instrument for locating a break in a cable during emergency maintenance?A. OSAB. OTDRC. MultimeterD. Power meterThe voltage regulation of a shunt transmission line will be maximum when the value of tan OR, for lagging power factor is (b) R X2 (a) Unity (c) Zero (d) *
- The good effect of corona on overhead lines is to (a) increase the line carrying capacity due to conducting ionised air envelop around the conductor (b) increase the power factor due to corona loss (c) reduce the radio interference from the conductor (d) reduce the steepness of surge frontsUsing Nyquist criterion, how counter-clockwise encirclements of -1 made by mapping are in the given system below?400Ω A k=0.9 600Ω B k=0.8 66Ω 600Ω
- What causes of reflactive in transmission line?The figure below shows the one-line diagram of a simple three-bus power system withgeneration at bus 1. The voltage at bus 1 is V1 = 1.0∠0°per unit. The scheduledloads on buses 2 and 3 are marked on the diagram. Line impedances are marked inper unit on a 100 MVA base.(a) Using Gauss-Seidel method and initial estimates of ?2(0) = 1.0 + ?0, ?3(0) = 1.0 + ?0, determine V2and V3. Perform two iterations.(b) If after several iterations the bus voltages converge to?2 = 0.90 − ?0.10 pu?3 = 0.95 − ?0.05 pudetermine the line flows and line losses and the slack bus real and reactive power.explain the effect of sag verses tension in an overhead transmission line