UMKC Senior SUBSTATION DESIGN TEAM Website:

UMKC Senior SUBSTATION DESIGN TEAM

Website: http://umkcsubstationdesign.weebly.com/

UMKC Senior Substation Design TeamMembers:Zane Potts - Power TransformerPayam Ansari - Circuit BreakersBrandon Howland - Protective RelayingRobert Biggs - Lightning MitigationEhab 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

Circuit Breaker

Current Transformer

Purpose of Circuit Breakers and Disconnect Switches

Size of Breakers• Fault Current

• Continuous Current• X/R Ratio

• Power Flow

Disconnect Switch and Circuit Breaker

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

CoordinationLightning/Switching SurgeEhab – GroundingGary – Substation & Equipment LayoutLine PhasingGary – Substation & Equipment Layout

Why grounding is important ?1-Path for short circuit to remote earth2-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 :– Touch Voltage : Voltage difference between equipment being touched and the ground at your feet

– Step Voltage : Voltage difference in ground between your feet as you are standing or walking

GPR ( Ground Potential Rise )

- V = I * R -Fault current into the grounding system times resistance to “remote earth”

Grounding Design procedure :

Substation Layout

ControlsRacewaysTrenchConduitControls house

Security and ServiceabilityFencing RoadwaysLighting FoundationStabilityElevation Containment

Substation Layout Bus LayoutConfigurationReliabilityCostPhysical LayoutForces PotentialsMaterials usedCopperAluminum

Website: http://umkcsubstationdesign.weebly.com/

QUESTIONS?

Professional Guidance Provided by: