Electrical Power System Protection

Electrical power and energy are not only an essential part of production in industrial and commercial processes, but are crucial for maintaining the quality of our civilization. Faults in electrical systems lead to inevitable interruptions of the power supply and must therefore be cleared quickly selectively and in the best possible way.

This task is performed by protective devices which are selected, parameterized and operated by specially trained protection engineers.

The main objective of the course is the mastery of the state-of-the-art technology for the operation and testing of protective devices and systems. After clarifying the necessary requirements for a protection system, the main topics of the university course are the fault calculation for single and multi-pole faults, and the presentation of the different protection concepts.

• You will learn the basics of protection technology.
• You will critically assess the development of faults and the behavior of the protective devices.
• You will learn how to ensure security of supply.
• You will learn the basics of network and system protection technology.

The online university course consists of 6 modules:

Module 1: System aspects

• Systems and Security of Supply
• Short Circuit Calculations
• Faults and Network Availability
• Risk Management
• Coincidence Probability
• Protection and Network Reliability Indicators

Module 2: Overcurrent protection

• Protection Fault Dynamics
• Overcurrent basics
• Overcurrent Time Grading
• Overcurrent ring structures
• Current Time Grading Transformers
• Reverse Current Interlocking Scheme
• Overcurrent Protection Selectivity, Fault Locating
• Overcurrent Back-up Protection

Module 3: Differential protection

• Differential Protection Basics

Module 4: Earth fault protection

• Earth Fault Protection and Neutral Point Treatment
• Earth Faults - Dynamics and Stationary Characteristics
• Earth Fault Calculations
• Earth Fault Relaying - Wattmetric Relays
• Earth Return Path Factor

Module 5: Distance protection

• Distance Protection Basics
• Distance Protection Basic Selectivity and Grading Scheme
• Signal Comparison

Module 6: Fault behavior

• Failure Modes and Fault Analysis
• Transformer Vector Groups
• Disturbances behind Different Transformer Vector Groups
• Current Transformers