Q7. A 480V 50Hz Y-connected six-pole synchronous generator is rated at 100kVA at 0.8 PF lagging. It has a synchronous reactance of 2.56 2/phase and negligible armature resistance. Assume that this generator is connected to a steam turbine capable of supplying up to 113kW. The friction and windage losses are 2kW, and the core losses are 1kW. (a) What is the maximum output power available? (b) Construct the capability curve for this generator considering a max. load angle of 80°. (c) Can this generator supply a line current of 200A at 0.6 PF lagging? Why or why not? (d) What is the maximum amount of reactive power this generator can produce? (e) If the generator supplies 40kW of real power, what is the maximum amount of reactive power that can be simultaneously supplied and what is the corresponding field excitation and load angle?

Q7. A 480V 50Hz Y-connected six-pole synchronous generator is rated at 100kVA at 0.8 PF lagging. It has a synchronous reactance of 2.56 2/phase and negligible armature resistance. Assume that this generator is connected to a steam turbine capable of supplying up to 113kW. The friction and windage losses are 2kW, and the core losses are 1kW. (a) What is the maximum output power available? (b) Construct the capability curve for this generator considering a max. load angle of 80°. (c) Can this generator supply a line current of 200A at 0.6 PF lagging? Why or why not? (d) What is the maximum amount of reactive power this generator can produce? (e) If the generator supplies 40kW of real power, what is the maximum amount of reactive power that can be simultaneously supplied and what is the corresponding field excitation and load angle?

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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