A subdegree precision sun tracker for 1000X microconcentrator modules

A subdegree precision sun tracker for 1000X microconcentrator modules

In this paper we present a subdegree precision pedestal sun tracker developed for 1000X microconcentrator modules. Setting a cost target of 100 /spl euro//m/sup 2/, a lightweight structure has been designed that, fully made out of commercially available parts, stays operative for wind speeds which a...

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Hauptverfasser: Luque-Heredia, I., Martin, C., Mananes, M.T., Moreno, J.M., Auger, J.L., Bodin, V., Alonso, J., Diaz, V., Sala, G.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Automatic control
Costs
Error correction
Fitting
Lightweight structures
Sensor arrays
Solar radiation
Sun
Target tracking
Wind speed
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Zusammenfassung:In this paper we present a subdegree precision pedestal sun tracker developed for 1000X microconcentrator modules. Setting a cost target of 100 /spl euro//m/sup 2/, a lightweight structure has been designed that, fully made out of commercially available parts, stays operative for wind speeds which account for at least 95% of the available direct solar radiation. The electronic tracking control unit relies on a strategy which resorts to high accuracy solar ephemeris, parameter fitting for a model of installation and manufacturing errors, an adaptive algorithm for absorbing unforeseen or time varying errors, and automatic calibration of cheap sun pointing sensors against array power output.