High Voltage Electrical Grounding and Bonding For Utility and Industrial Applications

OVERVIEW

• Basics Of High-Voltage Grounding
• Electrical Bonding of High Voltage Systems
• Proper Sizing of Conductors
• Grounding of Substations
• High-Voltage Surge Protection
• Electrical Grounding for Lightning Protection

SUBSTATION GROUNDING DESIGN

Session 1: Definitions and Interpretations

• Determination of Need of Personal Protective Grounding
• Basic Criteria for Safe Grounding Practices
• Electric Shock Hazard
• Grounding Practices
• Basic Design Options
• Soil Resistivity
• Ground Fault Currents
• Fault clearing Time

Session 2: Grounding Options

• Ground Cable Assemblies
• Grounding Cable Ampacities
• Grounding Cable Reactance
• Parallel Grounds
• Grounding Clamps
• Grounding Insulated Power Cable
• Ground Potential Rise (GPR) in Medium- and High-Voltage Systems

Session 3: Ground Grid Design for Substations

• Determination of Maximum Available Fault Current
• Exposure Voltage Calculations for Plants & Switchyards
• Touch and Step Potential
• Transferred Potential
• Elimination of Step and Touch Potential
• Selection of the Right Connector
• Horizontal Grid Design IEEE STD 80-2000
• Introduction to 2-Layer Soil Model
• Vertical Rods Connected by a Grid
• Temporary Grounding

Session 4: Switchyard and Substation Protective Grounding

• General Considerations for Placement of Protective Grounds
• Power Circuit Breakers and Transformers
• Disconnect Switches and Bus
• Insulated High Voltage Cable
• Cable Terminations
• Midsections and Splices
• Grounding Transformers and Phase Reactors
• Capacitor Banks

Session 5: Power Line Protective Grounding

• Grounding of Metal Transmission Structures
• Slip Joints
• Steel Pole Structures
• Overhead Ground Wires
• Structure Footing Ground
• Grounding on Wood Pole Transmission Structures
• Transmission Line Terminal Ground Switches
• Grounding on Distribution Lines
• Surface Equipment and Vehicle Grounding

Session 6: Technical Considerations in Protective Grounding in Substations and Switchyards

• Substation Grounding System
• Typical Shock Situations - Conditions of Danger
• Structure Touch
• Electric Circuit for Switch Operator Sources of Hazardous Current on De-energized Equipment
• Grounding and Jumpering Requirements
• IEE Std 80-2000

International and Local Regulations

• CSA
• IEEE 80-2000, IEEE Guide for Safety in AC Substation Grounding, 2000
• ASTM F 855-97 Standard Specifications for Temporary Protective Grounds
• IEEE 1246-2002, IEEE Guide for Temporary Protective Grounding Systems Used in Substations
• IEEE 1048-2003, IEEE Guide for Protective Grounding of Power Lines, 2003

TUTORIAL TIMETABLE:

Start: 8:30 a.m.
Coffee Break: 10:00 a.m.
Lunch: 12:00 noon (Not Included in Course)
Restart: 1:15 p.m.
Finish: 4:30 p.m.