Figure p2-4 shows a one-line diagram of a power system, Ask an Expert

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Figure P2-4 shows a one-line diagram of a power system consisting of a three-phase 480-V 60-Hz generator supplying two loads through a transmission line with a pair of transformers at either end (NOTE: One-line diagrams are described in Appendix A, the discussion of three-phase power circuits.)

(a) Sketch the per-phase equivalent circuit of this power system.

(b) With the switch opened, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?

(c) With the switch closed, find the real power P, reactive power Q, and apparent power S supplied by the generator. What is the power factor of the generator?

(d) What are the transmission losses (transformer plus transmission line losses) in this system with the switch open? With the switch closed? What is the effect of adding Load 2 to the system?

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Electrical & Electronics, Engineering

Category:- Electrical & Electronics
Reference No.:- M91964441

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