DistribuTech

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DistribuTech
Jim Poole Sr. Power Delivery Engineer ElectriCitie
s of NC, Inc.
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ElectriCities of NC
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ElectriCities of NC

• North Carolina Eastern Municipal Power Agency
  32 Cities
• Purchase electricity and managed
  co-ownership of base load generation
• Cities sell electricity to wholesale and retail
  customers

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Power Agency Resources

• Co-ownership in base-load Generation
• Supplemental purchase contracts
• Distributed generation
• Controllable loads

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Load Management (LM) Savings

• Minimize Coincidental peak demand with Supplier
• Coincidental peak is weather driven (extreme hot
  or cold) 
• Average 15-20 hrs/month

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Participants in LM activities

• Power Agency Staff
• Member Cities
• Retail customers

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Responsibility of Power Agency in LM

• Determine periods for load management
• Notification and coordination strategies
• Direct Indirect Controls

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Power Agency LM Controls

• Direct LM Controls
• Disturbed Generation
• Water Heaters
• Air Conditioners
• Strip Heat
• Voltage Regulators
• Indirect LM Controls
• Citys LM Systems

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Landline Communications Used

• Dial
• Notification -Phone Trees, Internet connections
• Back up LM controls - generation, regulators,
  LM systems
• Lease
• Control System communication FM SCA
• RTU communication for SCADA
• Frame Relay
• SCADA WAN communication
• RTU communication for SCADA

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Wireless Communications Used

• Pagers
• Notifications
• FM SCA
• Control - Gen, A/C, W/H, V/R, H/S
• VSAT
• SCADA WAN communication
• Cellular
• Control LM Systems, generation, voltage
  regulators, monitoring

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Telemetric Installation Controlling Distributed
Generation
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Telemetric Installation Controlling SCADA
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VSAT Installation SCADA
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FM SCA LM Switch Telemetric
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Wire or Wireless Communication?

• Wire considerations
• Availability
• Installation monthly cost
• Installation schedule
• Surge Protection
• Ground fault potential rise
• Circuit noise

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Wire or Wireless Communication?

• Wireless considerations
• Signal availability, coverage, and signal
  strength
• Signal reliability
• Installation monthly cost
• Weatherproof equipment (rain, ice, and snow)
• Bandwidth requirements and data volume
• Atmospheric conditions