Training program on "Protection of Electrical Power System & Protective Relaying"

CONTENTS:
  • Need of Protection,
  • Philosophy,
  • HT/EHT Protection,
  • Substation protection,
  • Protection Zones,
  • Need of Relaying, Different types,
  • Relaying Protection,
  • Fault detection,
  • Basics of Relay coordination,
  • Mitigation of effects of Electrical failure.
LEARNING OUTCOMES:

Enhance the knowledge of basic Electrical Power System Protection Techniques.

  • Further understanding of protective devices
  • Learn to calculate the basic fault currents flowing in any part of the Electrical system
  • Electrical system protection against faults and overvoltage‚Äôs
Sub Contents:

Power System Faults

  • Different types of faults
  • Incidence of faults on power system equipment
  • Effects of power system faults
  • Magnitude of fault current, short circuit calculations- Basics
  • Detection of faults; Clearance of faults
  • Requirements of protective relaying systems
Short Circuit Theory (Basics)
  • Effects of short circuit; Fault current sources
  • Calculations for Single and three Phase System.
  • Percentage Impedence
  • Fault current characteristics
Fault Studies
  • Equipment ratings
  • Purposes of fault calculations
  • Types of faults
  • Fault calculations
Components of Power System Protection Schemes
  • Fault detecting relays
  • Tripping relays and other auxiliary relays
  • Circuit breakers - bulk oil, air-blast, vacuum, SF6
  • Current Transformers
  • Voltage Transformers
  • Ground Transformers
  • The transition from electro-mechanical relays to electronic and digital microprocessor-based relays
  • The application of programmable logic controllers/li>
  • Modern microprocessor-based relays: review of types available
Current Transformers (CTs) & Voltage Transformers (VTs)
  • Various types of CTs, VTs & CVTs
  • Theory and characteristics of CTs
  • Application requirements of CTs for protective relaying
  • Accuracy classifications
  • Future trends in CT design
  • Testing of CTs and VTs
Co-ordination of Electrical Protection Systems (Basics)
  • Fuse to fuse; Circuit breaker to fuse
  • Fuse to circuit breaker
  • Back up protection
  • Limitation of fault current
  • Selective zones of protection
  • Types of bus protection schemes & Testing of bus protection schemes
  • Basic concept of differential protection
  • Application to various bus configurations
Feeder Over current Protection
  • Protective relaying requirements for loop and radial systems
  • Elements of feeder protection schemes
  • High set, low set, and inverse -timed elements
  • Co-ordination with other devices and fuses
  • Auto-reclosing of feeder circuit breakers
  • Various types of overcurrent relays
  • Electromechanical, electronic & digital relays
  • Relay setting criteria
  • Testing of overcurrent protection schemes
Transformer Protection
  • Over current and ground-fault protection
  • Application of differential protection to transformers
  • Gas relays, pressure and gas accumulation
  • Winding temperature and oil temperature devices
  • Testing of transformer protection schemes
  • Modern microprocessor-based multi-function relays - available functions, application and testing