Power systems lecture 2

University of Derby
College of Science and Engineering


Power Systems Engineering and Technology
Module Code: 6EJ528/9


Mahmoud Shafik BEng MSc PhD FHEA MIET MASME
Professor AC (Reader) in Intelligent Mechatronics Systems and
Technology
Principal Technology Investigator
Emails: & Office: MS225: Ext. No. 3170
Website: http://www.derby.ac.uk/staff/mahmoud-shafik/
LinkedIn: https://www.linkedin.com/pub/mahmoud-shafik-ph-d/7/237/60

, Lecture_5: Fundamental of Power Systems
Engineering and Technology
 Power Systems Network
 Power Systems Network Equations!
 Balanced Three-Phase Configurations
 Y Connections in Power Systems Network
 Line-to-Neutral Voltages
 Line-to-Line Voltages, and
 Line-to-Line Currents
 Δ Loads in Power Systems Network!
 Δ-Y Loads Conversion for Balanced
Loads Power Systems Network!
 Summary and Discussions!

Sensitivity: Internal

, Power Systems Network
For circuits operating in sinusoidal-steady-state, Kirchhoff ’s
current law (KCL) and voltage law (KVL) apply to phasor
currents and voltages.

Thus the sum of all phasor currents entering any node is
zero and the sum of the phasor voltage drops around any
closed path is zero.

Network analysis techniques based on Kirchhoff ’s laws,
including nodal analysis, mesh or loop analysis,
superposition, source transformations, and Thevenin’s
theorem or Norton’s theorem, are useful for analysing such
circuits.


Sensitivity: Internal