Small Village Power Systems 1999 PDF
Preview Small Village Power Systems 1999
Small village systems - Villa Las Araucarias E. Ian Baring-Gould National Renewable Energy Laboratory Golden, CO. USA •Villa Las Araucarias • Inland community on the coastal range • Mainly supported by forest industry • Health post, school and 17 homes • Community very prosperous and growing • 9.8 kWh daily load with a 1.2 kW peak estimated. • Average wind speed of 4.8 m/s Villa Las Araucarias Basic System Design Battery Bank Trojan T-105s or L-16s DC Source Center Plug AC Source Cener To Grid Wind Turbine Honda EZ4500 Generator WTG Rectifier and or Controler 20 Amp Control Room 20 Amp Gen room Relay + 60A 21-gL-gG 250A Fuse + + + Inverter Trace DX24 or SW30 + DAS CR10 Power System Components • Bergey Windpower Excel 10kW wind turbine • 33.6 kWh battery bank of Trojan L-16’s • Trace Engineering SE3024E inverter • Honda EM4500S 5.4 kW auto-start gasoline generator • 48 Volt DC bus with no DC loads • 220 V, 50 Hz AC distribution on a 0.91 km grid Positive Aspects • System has worked well from the technical side • Most problems are of a social nature – Utility – local operators • Problems can be solved • Utility is pursuing technology in other areas Technical Problems - Specific • Lightning strike(?) knocked out equipment - Inverter and turbine – Grounding enhancement's • Inverter repair problems (delay) • Battery charging irregularities • Repeated system downtime due to local system manipulation Technical Problems - General • Access to spare parts/repair • Inadequate manuals - – troubleshooting – languages • Equipment design for sustainability • Poor communications with sites Social Problems • System service and repair – Utility is reactive not proactive – Turnover of key utility personnel – Conflicts between utility branches (Engineering verses Operations) • Local operators – Systems treated like fiefdoms – No apparent understanding of operation Current Status • System operational • Renewed support from Utility – Regular general maintenance – Local support of system – Understanding of support requirements • DAS system operational • Equipment working properly
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