Reliability based stand-alone solar photovoltaic systems design.

摘要

In photovoltaic (PV) solar systems design, weather characteristics play an important role. The design criteria which takes the availability or unavailability of weather into account is mathematically described as the loss-of-load-probability (LOLP), which is defined as the fraction of the life time load.The function of a PV system also depends on the overall reliability of its components. The impact of component reliability on a PV system is that it will be likely to fail, for example, when a critical component in it fails ahead of its designated service life, even when the system is properly sized to match weather characteristics. Available literature indicate that to this time a PV design tool has not been developed to address quantitatively this requirement. Present work involves the development of such a tool, based on a new mathematical model involving the user defined confidence level, the LOLP.In the developed model, the LOLP is made a function of both weather factors and component reliability characteristics and the design configuration is accordingly made to produce an optimum configuration based on least cost. (Abstract shortened by UMI.)