UMKC Senior SUBSTATION DESIGN TEAM Website: http://umkcsubstationdesign.weebly.com/

UMKC Senior Substation Design Team Members: Zane Potts - Power Transformer Payam Ansari - Circuit Breakers Brandon Howland - Protective Relaying Robert Biggs - Lightning Mitigation Ehab Abdelhaq - Grounding Gary Kertz - Substation Layout Layout Website: http://umkcsubstationdesign.weebly.com/

What is a substation used for ? One of the main goals that every electrical utility company has is transportation of electrical energy from the generating station to the customer, while meeting the following main criteria: • High reliability of power supply • Low energy cost • High quality of energy (required voltage level, frequency etc.)

Power Transformer

Forms Core Shell

How It Interfaces

Disconnect Switches Bushings Current Transformer Circuit Breaker

Disconnect Switch and Circuit Breaker Purpose of Circuit Breakers and Disconnect Switches Size of Breakers Fault Current Continuous Current X/R Ratio Power Flow

Our Team Design of Breakers 3-138KV Breakers Ring Layout 1-69KV Breaker

Protective Relaying

Protective Relaying

Zones of Protection

Lightning & Switching Surge Mitigation Line Phasing

Coordination Lightning/Switching Surge Line Phasing Ehab – Grounding Gary – Substation & Equipment Layout Line Phasing

Why grounding is important Why grounding is important ? 1-Path for short circuit to remote earth 2-Provide safe step and touch potentials Grounding system design consists of all the following : Grounding rods Grounding grid Copper cables Equipment connectors

Main safety issues in grounding to be concerned about in designing the grounding system : Step Voltage : Voltage difference in ground between your feet as you are standing or walking Touch Voltage : Voltage difference between equipment being touched and the ground at your feet

GPR ( Ground Potential Rise ) - V = I * R -Fault current into the grounding system times resistance to “remote earth”

Grounding Design procedure :

Substation Layout Security and Serviceability Fencing Roadways Lighting Foundation Stability Elevation Containment Controls Raceways Trench Conduit Controls house

Substation Layout Bus Layout Reliability Configuration Physical Layout Cost Physical Layout Forces Potentials Materials used Copper Aluminum

Questions? Website: http://umkcsubstationdesign.weebly.com/ Professional Guidance Provided by: Website: http://umkcsubstationdesign.weebly.com/