Course description
In Unit Protection of Feeders, you'll learn ...
- Why unit protection of feeders is preferred over graded overcurrent protection in some cases
- Why the communication method between the protection relays is one of the most important factors of unit protection
- Basic unit protection concepts involving circulating current, balanced voltage, direction convention, transient instability and bias
Overview
Credit: 2 PDH
Length: 37 pages
Graded overcurrent protection design, though quite simple, does not meet all the protection demands of an electrical power system. Application issues are experienced for two reasons: firstly, acceptable grading cannot be accomplished for a complex electrical system, and secondly, the protection adjustments may lead to maximum operating times that are excessive and cannot stop faults.
With the unit protection concept, parts of the electrical system are separately protected without reference to other parts of the system. One unit protection concept is widely known as ‘Differential Protection’. The foundation of this principle is to detect the difference in currents between the incoming and outgoing terminals of the protected element. Other unit protection concepts can be based on directional comparison, distance tele-protection arrangements or phase comparison unit protection.
This course is intended for electrical engineers with a desire to understand the fundamentals of feeder unit protection. Presented details cover basic unit protection concepts and their particular applications to high voltage feeders.
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Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 20 questions. PDH credits are not awarded until the course is completed and quiz is passed.
Training content
This course teaches the following specific knowledge and skills:
- Summation arrangements
- Electromechanical, static and numerical/digital unit protection systems
- Relay time synchronization
- Current differential and phase comparison schemes
- Carrier unit protection schemes
Costs
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