1. ECE 476 POWER SYSTEM ANALYSIS
Lecture 2
Complex Power, Reactive Compensation, Three Phase
Muhammad Abdul Retha lefte Al-Badri
Department of Electrical and Computer Engineering

2. For lectures 2 through 3 please be reading Chapters 1 and 2
Announcements
For lectures 2 through 3 please be reading Chapters 1 and 2

3. Review of Phasors
Goal of phasor analysis is to simplify the analysis of constant frequency ac systems
v(t) = Vmax cos(wt + qv)
i(t) = Imax cos(wt + qI)
Root Mean Square (RMS) voltage of sinusoid

4. Phasor Representation

5. Phasor Representation, cont’d
(Note: Some texts use “boldface” type for complex numbers, or “bars on the top”)

6. Advantages of Phasor Analysis
(Note: Z is a complex number but not a phasor)

7. RL Circuit Example

8. Complex Power

9. Complex Power, cont’d

10. Thanks Any ?????