This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: transfer an impedance from one side to the other? 5) [15 pts] A new 3 φ transformer has the following selfcooled (OA or ONAN) ratings: Primary: Yconnected, 345 kV, 296 MVA Secondary: Yconnected, 118 kV, 296 MVA Tertiary: Δconnected, 13.8 kV, 77 MVA Binary shortcircuit tests performed at the factory give the following results: Z 12 = 6.21% on 296MVA 345kV base. Z 13 = 55.9% on 77MVA 118kV base. Z 23 = 42.1% on 77MVA 13.8kV base. Find the per unit impedances Z 1 , Z 2 and Z 3 on a base of 100 MVA, 138 kV. These must be provided to your systems studies engineers. It may be helpful to refer to section 2.8 of your text book....
View
Full Document
 Fall '10
 Bonk
 Konrad Zuse, Z1, Homework Cover Sheet, MVA Binary shortcircuit, conceptual phaseshifting transformer

Click to edit the document details