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The effects of controls and controllable and storage loads on the performance of stand-alone photovoltaic systemsStand-alone photovoltaic systems have been modeled and analyzed from sunlight in to consumer product out. By including the consumer product in the analysis, concepts such as 'product storage' (a storage tank for water or cold-plates for refrigeration) and loads controllable by the system controller have been added to the system analysis. From a controls analysis viewpoint, this adds state variables to the system. The result is that the system controller can make operating control decisions on the energy flow between these various system elements to optimize system performance and reduce system cost. The effects on system performance of various control schemes employing these concepts are presented. Analysis of water pumping and/or refrigeration systems show possible performance improvements of greater than 15% with the addition of controllable loads with product storage.
Document ID
19820061492
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Cull, R. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Eltimsahy, A. H.
(Toledo, University Toledo, OH, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Energy Production And Conversion
Meeting Information
Meeting: Photovoltaic Specialists Conference
Location: Kissimmee, FL
Start Date: May 12, 1981
End Date: May 15, 1981
Accession Number
82A45027
Distribution Limits
Public
Copyright
Other

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