DC Microgrid/Camp2019 Notes

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Some notes from the Microgrid meetings during camp

• Safetylimit 60V (Europe)
  • Voltage drop over longer distances
• “Sneaker Power”
  • Loss for Charing/Discharging vs. cable voltage drop
• SHA2017
  • no batteries were unstrained
  • 48V DC PSU from HP Blade Servers -> Hackable
• 230V AC as Interconnect?
• PoE
• Grid Interconnects
  • Isolation?
  • Fuses/Circuit Breakers
• “Smart” On/Off switches for devices
  • Special states
    • On (for important devices)
    • On if there is enough power
    • Off
  • How?
    • Dedicated Wireless link
    • Powerline
    • Voltage level
      • Turn off at 38V, turn on at 42V
      • Avoid bouncing
      • Add delay
    • normal network
    • dedicated data cables
• What do we interconnect?
  • Power sources?
  • Batteries?
• Create Awareness
  • How much power is used?
  • Display current usage
  • Kits for monitoring village usage
    • eMon Pi
    • Tweet-A-Watt