Power System Protection
Power System Protection
OBJECTIVES
- Comprehend protective relaying philosophies and choose appropriate protection strategies
- Understand how electromechanical relays work and how they are emulated by microprocessors
- Design a properly-coordinated overcurrent protection system for a radial distribution system
- Properly specify instrument transformers for protection applications
- Design protection schemes utilizing differential and distance relays, including pilot protection
WHO SHOULD ATTEND?
- Engineers and technicians new to the power industry
- Intermediate-level engineers and technicians responsible for power system protection
- Professionals involved with developing protection schemes to improve reliability
- Facility engineers and consultants who conduct protection studies
- Engineers tasked with assessing the effectiveness of protection schemes
COURSE OUTLINE
Day One: Introduction, Math Review, Symmetrical Components, and Sequence Networks
- Protection introduction
- Phasor math
- Per-unit calculations
- Symmetrical components
- Sequence networks
- Fault modeling
Day Two: Electromechanical and Digital Relays, Relay Schemes for Radial Systems, Time-Coordinated Overcurrent Protection
- Electromechanical relay operating principles
- Microprocessor-based relay implementation
- Instantaneous and time overcurrent relays
- Reclosers and sectionalizers
- Time-current curves
- Device coordination
Day Three: Relay Schemes for Networked Systems and Device Protection
- Distance relays
- Distance relays with pilot protection
- Differential relays
- Differential relays for bus protection
- Differential relays for generator protection
- Differential relays for transformer protection
Day Four: Effect of Protection on Reliability
- Reliability indices
- Fault clearing time and reclosing
- Effects of nearby faults
- Fuse saving strategy
- Fuse blowing strategy
- Intelligent protective devices
Day Five: Arc Flash Hazard and a Look to the Future
- Shock hazard versus burn/blast hazard
- IEEE 1584 and NFPA 70E
- Personal protective equipment
- Hazard labeling
- A look to the future: communication-based overcurrent protection
- A look to the future: intelligent sectionalizing