Relay Protection for Power System

Customer request:

TOPIC: RELAY PROTECTION FOR POWER SYSTEM
DATE: 2ND WEEK OF OCT 2024
VENUE: KL (Malaysia)
LEVEL: INTERMEDIATE

Power system protection relays operate when there is a disturbance of the voltages, currents, or frequency on the high-voltage network, preventing or minimizing their effects on the affected plant. We are looking into Power system protection relays that operate when there is a disturbance of the voltages, currents, or frequency on the high voltage network, preventing or minimizing their effects on the affected plant. The overarching objective of protection systems is to ensure fast, reliable, and selective clearance of unwanted conditions within the high-voltage network. In other words, to ensure the safety of personnel, the public, and equipment, while minimizing disruptions to the power network. The protection systems are therefore a critical part of the high voltage network, and understanding how they operate and how to design them is essential for the safe and reliable operation of an electric power system. As protection systems are important in determining high voltage network expansion limitations, day-to-day operation, and equipment maintenance activities, a solid understanding of relay protection is important for planning, system control, and asset management engineers and technicians.

Proposed course by Elec-Engg.com

Course Details

Fundamentals of Power System Protection

• What do we want to protect?
• Function of protection system
• Protection system elements
• CT
• VT or PT
• Protective relay
• Circuit breaker

Numerical relays

• Structure of Numerical Relay
• The architecture of the Numerical relay
• Multifunction Protection Relays
• Example Feeder protection
• The block diagram for typical numerical relays
• Digital Phasor Measurement
• Numerical relay calculations
• Zones of Protection
• Protection Single Line Diagram

Protection Functions

• Overcurrent Protection function
• Earth fault protection function
• Negative sequence protection function
• Differential protection function
• Voltage protection function
• Frequency protection function
• Directional overcurrent
• Impedance protection function
• Definite-Time Characteristic Curve
• Inverse-Time Characteristic Curve
• Directional Overcurrent Protection, Phases
• Directional Overcurrent Protection, Ground
• Power Protection (P,Q), 3-Phase
• Circuit-Breaker Failure Protection

GENERATOR PROTECTION

• Why Generator Protection
• Generator faults
• Generator Differential Protection Schemes
• Stator Earth Fault Protection (100%, 95%, and 3rd harmonic schemes)
• Rotor Earth Fault Protection
• Stator Overload Protection
• Negative Phase Sequence (NPS) Protection
• Over Voltage and Over Excitation Protection
• Under Excitation Protection
• Reverse Power Protection
• Under and Over Frequency Protection
• Out-of-Step Protection
• Backup protection
• Generator Impedance protection (Ansi 21)
• Over fluxing protection (Ansi 24)
• Over Under Volt (Ansi 27 59G)
• Reverse Power (Ansi 32)
• Under excitation (Ansi 40G)
• Negative Sequence (Ansi 46)
• Overcurrent voltage dep (Ansi 51V)
• Stator Earth Fault (Ansi 64S)
• Rotor Earth faut (Ansi 64F)
• Pole Slip (Ansi 78G)
• Over Under Freq (Ansi 81)
• Generator Diff Protection (Ansi 87G)
• Turn to Turn faults
• Inadvertent energization protection

TRANSFORMER PROTECTION

• Why transformer protection
• Transformer faults
• Earth fault on H.V. external connections
• Phase-to-phase fault on H. V. external connections
• Internal earth fault on H.V. windings
• Internal phase-to-phase fault on H.V. windings
• Short circuit between turns H.V. windings
• Earth fault on L.V. external connections
• Phase-to-phase fault on L.V. external connections
• Internal earth fault on L. V. windings
• Internal phase-to-phase fault on L.V. windings
• Short circuit between turns L.V. windings
• Transformer protection scheme
• Transformer Phase Shifts
• Transformer differential protection
• Bias Differential Basic Principles
• Stability under Magnetizing Inrush Conditions
• Transformer-restricted earth fault
• Buchholz and Pressure Relief Devices
• Over Excitation protection

BUSBAR PROTECTION

• Busbar Protection Intro
• Bus Configuration
• Busbar Differential Protection
• Protection Zones
• Double Busbar
• Check Zone
• Zone interconnection
• Load transfer in the double busbar
• Central and Bay Unit Designs

LINE PROTECTION

• Transmission line faults
• Faut types (Transient, Persistent)
• How do we protect transmission line
• Directional overcurrent
• Directional earth fault
• Fault Location in transmission line
• Single-end fault location
• Double-end fault location
• What is distance protection?
• Why do we use distance protection?
• Distance protection method
• SOTF protection
• STUB protection
• Line differential protection
• Breaker failure