# mastering power system fault calculations

```THE SOUTH AFRICAN INSTITUTE OF
ELECTRICAL ENGINEERS
MASTERING POWER SYSTEM
FAULT CALCULATIONS
SAIEE-0952-V : 2 CPD credits : Category 1
Corporate Conference Centre,
101 Edward Drive, Dowerglen, Edenvale,
JHB
OVERVIEW
Designers users of electrical power systems are forced to
calculate the magnitudes of short-circuit faults that can occur
in different parts of these systems. Fault currents depend on
source-impedances and the pre-fault voltages in these systems
where faults occur. In designing a new power system or
extending an existing one, the only practical method of
establishing fault levels is through calculation.
Symmetric three-phase faults usually lead to the maximum
fault currents and the highest stress to power system
components and are the simplest to calculate and the starting
place for fault calculations. However fault level calculations are
unfortunately not always limited to symmetric type faults and
other types have to be calculated accurately in order to
establish layouts and designs for substations and their earthing
systems. The design of these systems has to cater for the
calculation of step-and-touch potentials and the specifications
of grounding-systems which require the accurate calculation of
non-symmetric fault magnitudes. The calculation of these types
of fault, require a more sophisticated approach requiring the
use of Symmetrical Components Theory.
It is the aim of this course to familiarise delegates with the
fundamental concepts involved in Electrical Protection Fault
Calculation. This will enhance their understanding of the
software they use, expand their fields of application of such
software and increased their confidence & skills in using it.
COURSE OUTLINE
REVISION OF ESSENTIAL ELECTRICAL POWER
SYSTEM THEORY & SYMMETRICAL FAULT CALCS
Fundamentals of three-phase Power Systems
Review of three-phase Power Definitions/ Calculation of
Complex Power in balanced three-phase power systems/
Thevenin’s theorem/ Power Transformer model/ The per-unit
system/ Worked examples & assignments
Symmetrical Fault Calculations
The need for electrical protection/ Anatomy of an electrical
fault/ Requirements of electrical protection/ Protection system
components/ Types of electrical faults/ Basics of fault
calculation/ Symmetrical Faults in unloaded power systems/
Symmetrical faults in multi-branch networks/ Symmetrical
faults in loaded systems/ worked examples
THEORY & PRACTICE OF NON-SYMMETRICAL
FAULT CALCULATIONS
Un-symmetrical fault calculations
Intro to symmetrical components/ Analysis of unbalanced
conditions in three-phase systems/ Nature of symmetrical
components/ Sequence networks/ worked examples
Unsymmetrical faults/ worked examples/ delegates exercises
and familiarization with Smath Studio, LT Spice & other
software aids.
Course Wrap up
TARGET AUDIENCE
COST : R5,700 - includes teas, lunches and
course material
R4,500 discounted fee for active SAIEE Members
COURSE DATES :
22-23 April 2015 : JOHANNESBURG
Registration : 08:00 – 08:30
Workshop : 08:00 - 17:00
PRESENTER
PROF PIET SWART Pr Eng. D.Eng.Elect (RAU),
FSAIEE
Piet began his career in 1956 and has progressed
through the ranks to become Resident Engineer and
Project Engineer in the operating and construction of
three large new mines. He made a major change to his
career midway, after being sponsored byh the Anglo
American Corporation of SA for full time study at
RAU. After completing the B.Eng degree, he was
employed with the University as Laboratory manager
and became a consultant for AEC in the development of
Ultra High Power Pulse Laser Systems and completed his
Master’s and Doctorate studies in that field.
Piet became interested in harmonics and power Quality
in 1992 when he engaged in the design of harmonic
mitigation systems for a large laser plant at the AEC. He
authored and co-authored several International papers
on Harmonics and power quality related subjects which
have received wide citation and some of which are
quoted in international standards. He has lectured on
Power Systems and Power system Protection for several
years at tertiary level.
REGISTRATION : CONTACT DETAILS
ROBERTO BENITES
011 487 9042
[email protected]
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