This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ht Source: N. Mohan 2010 9 Power from the Wind © Copyright N. Mohan 2010 Source: 10 Electrical System Model: Source:
© Copyright N. Mohan 2010 11 El Electric Power Basics Basics Power Systems Electric Generators Generators Power Electronics Research (2 slides) (2 slides) Curricular Reform (2 slides) © Copyright N. Mohan 2010 12 Power System Basics Power System Basics
V 0 Time
Low-Voltage Ride-Through 0 690V 10 60 Hz Generator
690V 34.5 kV
13 Power Electronics Electronics Converters
© Copyright N. Mohan 2010 Reason for using AC: Ability to Transformer Voltage Levels © Copyright N. Mohan 2010 14 Phase Relationship between Voltage and Current:
p (t )
2V 2I average power /
v(t ) p (t ) average power 0
v(t ) t 0 t (a )
Average P V I i (t ) ( b)
Average P V I cos cos i (t ) © Copyright N. Mohan 2010 15 Phasors
Imaginary v (t ) 2 V cos t positive angles i (t ) 2 I cos(t ) V V 0 Real i( t ) I I I j L j X L v( t ) 2V cos( t ) L
V V 0 Z R jX L jX c R 1 j j XC C (b) R
(a ) V V I Z Z Ri (t ) L di (t ) 1 i (t ) • dt 2 V cos(t ) dt C © Copyright N. Mohan 2010 16 P and Q I Subcircuit 1 V Subcircuit 2 S P jQ Im (a) IP V V v Im S QQ j IQ Re P (c)
Re I I i (b) P...
View Full Document
This note was uploaded on 02/26/2011 for the course EE 523 taught by Professor Dr.hopkins during the Spring '11 term at SUNY Buffalo.
- Spring '11