Chapter 4: Reliability in Power Distribution Systems Flashcards
(42 cards)
What are reliability indices
These are the parameters used for a comprehensive assessment of electrical power systems reliability
Why is assessing the reliability of power distribution networks of great interest
Because most of the interruptions in power supply result from power distribution system failure.
What are the methods of power system reliability evaluation
Analytical and simulation
How does analytical reliability evaluation of power systems work
This technique represents the system by a simplified mathematical model using direct mathematical solutions
How does simulation reliability of power systems work
Estimates the reliability indices by simulating the actual process and random behaviour of the system
What are the classifications of evaluation of reliability indices
Repairable and non-repairable
What do we stand to gain from the accurate analysis of power system reliability
Assists in predicting future failure behaviour, making appropriate maintenance plans
What causes the most significant of outages on overhead distribution systems
Animals (Birds)
What does MTTF stand for
Mean Time To Failure
What does MTTR stand for
Mean Time To Repair
What does MTBF stand for
Mean Time Between Failures
What does SAIDI stand for
System Average Interruptions Duration Index
What does SAIFI stand for
System Average Interruption Frequency Index
What does CAIDI stand for
Customer Average Interruption Duration Index
What does lambda stand for
Failure Rate
What does miu stand for
Repair rate
What does A stand for
Availability
What does OH stand for
Outage hour
What does L stand for
Load Shedding period
What does F stand for
Fault
What does ON stand for
Feeder on lowest reading value of calibration
What does DNP stand for
Feeder on Disconnection for Non Payment of Monthly bill
What does H stand for
Hours
What does FN stand for
Feeder Name
