Power system protection is one of the most important aspects of the electrical power industry. Without protection, any stem fails. So it is imperative that safety and protection be given utmost importance to avoid catastrophes.
This course is designed to help students to understand the fundamentals of electric power protection, so that they can choose appropriate protective devices/measures for different components, interpret different protection systems in their plant and also detect short-comings. Simple calculations can be performed too.
Most important of all, they can improve the safety of the site by making better decisions on system protection.
WHO SHOULD COMPLETE THIS COURSE
- System protection engineers
- Power System engineers
- Testing engineers
- Power system analysts
- Consulting Engineers
- Electrical Engineers/Technicians
- Maintenance Engineers/technicians
- Process Engineers/Operators
- Technical Managers
- Course outline
COURSE OUTLINE
BASICS OF POWER SYSTEM
- What is a power system?
- Ac networks and voltage classification
- Distribution Equipment and types of distribution systems.
- Typical Industrial distribution system
POWER SYSTEM PROTECTION
- Principles of protection
- Need for protection
- Qualities of protection system
- Basic requirements and components.
FAULTS- TYPES AND CALCULATION
- Description of fault
- Various types of faults
- Fault current calculation-Impedance, p.u values, Short circuit KVA ,base MVA
- Symmetrical and asymmetrical components
- Earth Faults; Limiting Earth faults
EARTHING AND EARTH FAULT CURRENT
- Effects of electricity on human body
- Classification of protective earthing systems
FUSES AND CIRCUIT BREAKERS
- Approaches to protection
- Fuses- Description, Types, Application and Characteristics
- Circuit breakers-LV Circuit Breakers- Features and Highlights
- Purpose of Circuit Breakers
- Fault Clearing time, Quenching action
- Types of Circuit Breakers based on quenching medium
- Power control for Circuit breakers-Batteries
INSTRUMENT TRANSFORMERS
- Attributes and Importance of Instrument Transformers
- Theory of Operation and types of Instrument Transformers(CT and VT)
- CT Magnetizing curves
- Polarity of CT and VT, Class X CT
- Connection of CT in 3 phase systems.
PROTECTIVE RELAYS
- Types of Relays and protection
- Relay Burden
- Over current protection
- Digital Relays-Reasons for their choice, Technical features
- Testing of Static Relays
- IED-Features
- Substation Automation
RELAY CO-ORDINATION AND PROTECTION GRADING
- Basic Principles
- DMT and IDMT Characteristics
- Co-ordination rules
UNIT PROTECTION
- What is unit protection?
- Types and Application
- Biased Unit Protection
- Advantages of unit protection
PROTECTION FOR FEEDERS AND LINES
- Feeder protection approaches
- Parallel Feeder protection
- Unit protection and Pilot Wire protection
- Distance protection
SWITCHGEAR AND TRANSFORMER PROTECTION
- Types of protection for Bus bars
- Advantages and disadvantages of the Bus bar blocking scheme
- Types of Transformer faults
- Challenges in differential Protection
- Earth fault protection
- HV and LV side protection
- Buchholz Protection
- Overload protection
- Protection Summary
PROTECTION OF MOTORS AND GENERATORS
- Motor failures
- Protection functions for AC motors
- Protection methods for motors
- Generator faults(electrical and Mechanical)
- Protection methods for generators
- Protection Scheme for Industrial Generators
- Protection for generators in parallel
