The purpose of this study is to define the reliability index for electrical power
systems specifically and without using alot of data and treating processes. Results of this
study is useful in electrical networks planning and design because of its
technical and
economical importance in the optimal choosing of networks elements and connections. In
this research we use petri nets concept to represent electrical nets under studying then
simulate the equivalent chart on GRIF program to find reliability degree for the system and
its elements. This research includes comparing the suggested methodology to a reference
net and then apply this method on electrical local network to discuss the results. It has
been proved that petri nets are effective in reliability calculations with the best of
simulation methods.
