Mahmood Sadoughi - Department of Electrical Engineering, Islamic Azad University, Ferdows, Iran
Ali Zahmatkesh - Department of Electrical Engineering, Islamic Azad University, Ferdows, Iran
HamidReza Ghafari - Department of Electrical Engineering, Islamic Azad University, Ferdows, Iran
Hadi Afkar - Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran, Iran
Seyed Hossein Karimzadeh - Department of Electrical Engineering, Islamic Azad University, Ferdows, Iran
Mohsen Hoshangnejad - Department of Electrical Engineering, Islamic Azad University, Ferdows, Iran

This paper shows the optimum Phasor Measurement Unit (PMU) placement for full observability of the power system. Cuckoo Optimization Algorithm (COA) in MATLAB is used for this optimization and comparing results with other algorithms shows excellent efficient of this programming. IEEE ۱۴, ۳۰, ۵۷, ۱۱۸-bus and Tehran ۴۱-bus regional electric power network are used as test systems.

Measurement Unit (PMU); Power System Observation;Cuckoo Optimization Algorithm (COA).