High Voltage Grounding and Bonding For Utility and Industrial Applications
Course Instructor
Pablo Diaz, P. Eng, Electrical Grounding Consultant, The Electricity Forum
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
- 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
INTERNATIONAL AND LOCAL REGULATIONS
- CSA
- IEEE 80, IEEE Guide for Safety in AC Substation Grounding
- ASTM F 855 Standard Specifications for Temporary Protective Grounds
- IEEE 1246, IEEE Guide for Temporary Protective Grounding Systems Used in Substations
- IEEE 1048, IEEE Guide for Protective Grounding of Power Lines
COURSE SCHEDULE:
Start: 10 a.m. Eastern Time
Finish: 4:30 p.m. Eastern Time
