Electric Utility Distribution Protection Fundamentals
Eric Stark, Electricity Forum Electrical Protection Specialist
DAY 1
Distribution and industrial power electricity
Power systems grid fundamentals
System design considerations
• Safety
• Reliability & Flexibility
System Planning
• Utility service & requirements
• Protection consideration
• Special Loads
Distribution Power system configurations
Equipment selection
• Circuit Breakers
• Voltage Transformers
• Current Transformers
• Relays & Protection Schemes
• Microprocessor and Electro-mechanical relays
Distribution Short circuit calculations
• Effects of Short Circuit
• Sources of Fault Currents
• Sensitivity & speed
• Voltage Considerations
• Limiting short circuit currents
Case study calculation using the MVA method
Distribution System grounding design considerations
Principles of power system protection Ground fault protection
• System grounding methods
• Zero-Sequence currents
• Ground Fault concerns
Case study: Sequence component calculation
Distribution Feeder Protection
• Main protection elements to consider
• Fuse characteristics
• Time-current coordination curves
• Relay-fuse-relay TOC, IOC selectivity & coordination
• Main-Tie-Main transfer schemes
• Radial systems, Loop systems, Selective systems
Distribution Bus Protection
• Main protection elements to consider
• Principles of Bus applications
• Bus topologies
• Protection Schemes
• Hi-ampacity current detection
• Hi-impedance relaying
Day 2
DER - Distributed Energy Resources and IBR
• Protection Challenges posed by renewable energy sources and IBR
• Microgrid technology developments and IBR
• Power Stability issues & IBR associated impacts on Protection
Transformer Distribution Protection
• Main protection elements to consider
• Substations components
• Protection philosophies
• Ground fault protection
• Neutral grounding systems
MV Distribution Transmission Line Protection
• Main protection elements to consider
• Line protection
• Line Distance protection relaying
• Line differential communication
• Non-pilot schemes
• Pilot wire & schemes
Motor Protection
• Main protection elements to consider
• Motor nameplates
• Thermal overload protection
• Thermal capacity relaying
• Acceleration limits
• Phase and Ground Fault Protection
• Protection elements
• Setting considerations
Case study: A complete relay setting calculation
Q&A and Course Review
Note: Each session should include a short break for attendees. The course should be interactive, with opportunities for attendees to ask questions and participate in discussions. Practical exercises and real-world examples should be used to illustrate the concepts being taught.
COURSE SCHEDULE:
Both days:
Start: 10 a.m. Eastern Time
Finish: 4:30 p.m. Eastern Time