In WPF, one of the most important demands is to design a reliable communication network for wind farm monitoring. The control center is responsible for monitoring, managing and control the operation of the WPF autonomously, and the human intervention is only needed in the case of configuration, maintenance and failure [4]. Fieldbus systems represent the first generation of industrial networks and due to its limitation in bandwidth and throughput these systems are no longer attractive solutions in the industrial applications. Currently, the second generation of industrial network is known as the real time Ethernet which can assure the low cost, improved performance and high data transfer rate [5]. Passive optical network (PON) based on real time Ethernet is considered as the next generation communication network for different industrial applications [6].