Substations & Switchyard

• Electrical High Voltage Experience
• Physical Design
• Protection Schemes
• Protection & Control Design
• Wiring Diagrams
• Telecommunication Design
• Relay Settings & Programming
• Oil Containment Experience
• Phase 3 Implementation
• Transmission & Distribution
• System Planning, Studies, & Analysis
• SCADA Design and Programming
• Electrical Panel Fabrication
• Substations & Switchyards Experience
• Types of Projects

Electrical High Voltage Experience

500 kV Substation Experience

• Last ten years over 200 projects at 500kV substations
• Developed Independent Pole Operation (IPO) Standard for TVA
• Example One: Completed 500kV switching station connecting 6 CTs to the 500kV grid
• Example Two: Converted 500kV yard from a main and transfer bus to a double breaker configuration

Physical Design

• Our Physical Design Group develops the following types of engineering documents:
• Electrical Equipment General Arrangements for the Switchyards and Substations
• Site Grading and Drainage
• Structures/Foundations
• Oil Containment Design
• Equipment Plans, Elevations, and Sections
• Control House Layout
• Grounding Studies
• Conduit/Grounding Drawings
• Bills of Material
• Cable Schedules

Protection Schemes

Commonly used protection schemes:

• Bus Differential
• Bank Differential
• Line Differential
• Over-current protection
• Over/Under Voltage protection
• Over/Under frequency and load-shedding protection
• Distance Protection
• Directional Protection
• Pilot Relaying Protection
• Breaker Failure Protection
• Capacitor Bank Protection

Protection & Control Design

Our Protection & Control Design Group develops the following types of engineering documents:

• Single Line Diagrams
• Three Line Diagrams
• Panel Front Views
• Elementary Diagrams (AC & DC)
• Equipment & Switchboard

Wiring Diagrams

• Nameplates and Wiring Tags
• Isolation & Restoration Work Plans
• Detailed Work Descriptions
• Battery Studies
• Bills of Materials

Telecommunication Design

Our Telecommunication Design Group is responsible for communications between Substations/ Switchyards, including:

• Digital Microwave Radio
• Power Line Carrier Relaying
• Fiber Optic Transport Systems
• UHF/VHF Radio
• GPS Radio
• Spread Spectrum Radio
• Cellular Phone - Radio Frequency Electromagnetic Field Measurement
• Wide Area Ethernet
• Battery & Charger Systems
• High Voltage Protection for Telephone Lines
• Telemetering
• Telephone Systems

Our Telecommunication Design Group develops the following types of engineering documents:

• Single Line
• Connection Diagrams
• Jumper & Cable Diagrams
• Line-to-set Connection Diagrams
• Panel Arrangement
• Bill of Material
• Cable Schedules/Indices

Relay Settings & Programming

SEL Relays:

Oil Containment Experience

Phase 1 Study:

• Station Evaluation
• Spill Prevention Control and Countermeasure (SPCC) Plan

Phase 2 Detailed Design:

• Containment & Diversionary Structures
• Storage

Phase 3 Implementation:

• Remediation
• Construction
• Construction Management
• Procedures
• Inspection
• Maintenance
• Operation
• Training

Transmission & Distribution

• Experienced in Transmission-to-transmission Design
• Experienced in Transmission-to-distribution Design
• Performed Independent Review of a Major Utility’s Transmission to Distribution P&C Standard
• Distribution Clients
• Alabama Power
• E ON.US
• Knoxville Utilities Board
• Progress Energy Florida
• Transmission Clients
• Progress Energy Carolina (PEC)
• Progress Energy Florida (PEF)
• Southern Co. (APCO, Gulf Power, Mississippi Power)
• TVA

System Planning, Studies, & Analysis

• Load Flow Analysis
• Short Circuit Analysis
• Load Growth Projections
• Economic Best Practices
• Grounding Analysis
• Software Experience
• Etap, Milsoft’s Light Table & Windmill, Aspin, CAPE, CDEGS

SCADA Design and Programming

• Siemens, Telvent, and Advanced Control Systems RTUs and controllers
• Integration with relays, breakers, metering, other SCADA systems
• Approximately 50 RTU configurations per year, last four years
• Previously, Mesa was the sole provider of RTU configurations for all TVA contracted RTU designs

Electrical Panel Fabrication

• Relay Panel Fabrication
• SCADA Panels Fabrication
• Instrument Tag Engineering Service
• Complete Documentation
• Installation/Start-up Assistance
• Procurement Services

Substations & Switchyards Experience

• Over 120 Professional, Technical, and Administrative Employees
• 24 Registered Professional Engineers working in the Electrical Division
• Over 2000 years of substation and switchyard experience

2000 years can be broken down as follows:

• 40 years of TPS Planning Experience
• 1475 years of Design Experience
• 325 years of Communications
• 110 years of Field Testing and Construction
• 90 years of Operations Experience
• Completed over 2000 substation design projects over the last 12 years.

Types of Projects

• Breaker Replacement
• Line Relay Replacement
• “Greenfield” Station
• Transformer Bank Replacement/Addition
• Metering Upgrades
• Capacitor Bank
• Reactor Bank