8-Assignment 8

# 8-Assignment 8 - ELECTRICAL ENGINEERING DEPARTMENT California Polytechnic State University EE 255 Assignment 8 Problem#1 At a location in Europe it

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ELECTRICAL ENGINEERING DEPARTMENT California Polytechnic State University EE 255 Assignment 8 Problem #1 At a location in Europe, it is necessary to supply 300 KW of 60-Hz power. The only power source available operate at 50-Hz. It is decided to generate the power by means of motor- generator set consisting of synchronous motor driving a synchronous generator. How many poles should each of the two machines have in order to convert 50-Hz to 60-Hz power? Problem #2 A 13.2-KV, 40-MVA, 0.8-PF-lagging, 60-Hz, 2-poles, Y-connected synchronous generator has a synchronous reactance of 2.2   and an armature resistance of 0.15 . . A t 60-Hz, its friction and windage losses are 1.1 MW, and its core losses are 1.8 MW. The field circuit resistance is adjustable over the range from 20 to 200 Ω. The OCC of this generator is Figure P4-1 of the text. a. How much field current is required to make the no-load line-to-line terminal voltage equal to 13.2KV? b.

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## This note was uploaded on 12/19/2011 for the course EE 295 taught by Professor Alishaban during the Fall '11 term at Cal Poly.

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8-Assignment 8 - ELECTRICAL ENGINEERING DEPARTMENT California Polytechnic State University EE 255 Assignment 8 Problem#1 At a location in Europe it

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