2.2.1. Reliability analysis
The dependency on nature and unpredictability of solarand
wind resources have a great impact on energy production which
leads to unreliable power supply during cloudy or non windy days.
A system is reliable if it is able to supply required power to the
electrical load within aspecific timeperiod . A power reliability
analysis is essential for system design and optimization process.
There are several methods in literature to calculate there liability
of a hybrid energy system which are summarized in Table2.