POWER
SYSTEM PROTECTION
Aims of this Course:
1.
To promote
understanding of the principles, operating techniques and setting procedures
(primary and secondary test methods) of power system protection schemes.
2.
To
interpret protection fault indications and determine corrective actions.
3.
To provide
information and instruction in safe operating procedures in platform electrical
protection systems, including elements of maintenance of HV and LV protection relays.
Designed for:
Personnel from
electrical background required to operate/maintain/understand power system
protection schemes.
Outcomes:
On completion of the course participants
should
1.
Understand
the role of electrical protection of Power Systems
2.
Be able to
determine the protection settings of selected relays.
3.
Display
competence in:-
·
Primary
and secondary testing of selected relays.
·
Interpretation
of protection fault indications and determination of the corrective action.
·
Identification
of suitability of selected protection relays for specific purposes.
A large proportion of the course will be
practical and attendees should bring coveralls and safety footwear and glasses.
Course content will include:-
·
Identification
of switchgear wiring
·
Current
and Voltage transformers
·
Fuses in
protective systems
·
Protection
discrimination
·
Fault
levels and system impedances
·
Protection
of motors, generators and transformers
·
System
protection
·
Practical
testing
General
Course Content
Introduction
1.
Role of
Protection
2.
Protection
Principles
3.
Discrimination
4.
Faults and
Fault Levels
5.
Overview
of Protection Components
Fuses
Relays
Current and Voltage Transformers
Fuses
Relays
Current and Voltage Transformers
6.
Overview
of Protection Testing
Faults and Fault Levels
1.
Fault
Level Calculations
2.
Consequences
of a Fault Condition
3.
Arcing and
its prevention
4.
Limiting
the Effects of Faults
Principles of Discrimination
1.
Discrimination
by Current
2.
Discrimination
by Time
3.
I.D.M.T.
Overcurrent Relays
4.
Examination
of Protection Schemes
5.
Practical
Exercises -
Measurement
1.
Use of
Current and Voltage Transformers
2.
Practical
Exercises -
Mag Curves
Polarity Checks
Ratio Checks
Mag Curves
Polarity Checks
Ratio Checks
Relays
1.
Electro-mechanical
2.
Static/Electronic
3.
Microprocessor
4.
Practical
examination of types
Earth Fault and Earth Leakage Protection
1.
System
Earthing
2.
Earth
Fault Detection
3.
Restricted
Earth Fault
4.
E &
EIT Relays
5.
EIT Relays
with Overcurrent
Differential Protection
1.
Circulating
Current method
2.
Balanced
Voltage method
Generator Protection
1.
General
Principles
2.
Types of
relays
3.
Practical
Exercises
Transformer Protection
1.
General
Principles
2.
Types of
relays
3.
Practical
Exercises
Motor Protection
1.
LV -
Overcurrent and Earth Fault - Thermal and CT devices
2.
HV -
Overcurrent, Earth Fault and Negative Phase Sequence
3.
Practical
Exercises - Motor Protection Relays
Contents
of Manual
|
Preface
|
Section
1
|
Introduction
|
Section
2
|
Measurement
|
Section
3
|
Relays
|
Section
4
|
Faults
and Fault Levels
|
Section
5
|
Principles
of Discrimination
|
Section
6
|
Earth
Faults and Earth Leakage Protection
|
Section
7
|
Generator Protection
|
Section
8
|
Transformer
Protection
|
Section
9
|
Differential
Protection
|
Section
10
|
Motor
Protection
|
Section
11
|
Testing
|
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