Shahriar Amani - Department of Power Electrical Engineering Ardabil Branch, Islamic Azad University, Ardabil, Iran
Ali Toolabimoghadam - Department of Power Electrical Engineering ,University of Lorestan , Khorramabad, Iran
Alireza Nadi Polkhabi - Department of Power Electrical Engineering Karaj Branch, Islamic Azad University, Karaj, Iran

In recent years, voltage instability has focused on many of its power system users, as well as thegrowth of demand for electricity and the economy and the environment, has led to the expansionof new energy use. The purpose of this paper was to use a new method for determining theoptimal alternative and the minimum number of PMU units in the network based on the bestPSO algorithm. From the perspective of the PMUs in the system, location optimization isperformed based on the mode of estimation for variable voltage and control variables in adistribution network with DG resources and multiple loads. The purpose of this research is todetermine the optimal alternative and the minimum number of units of the PMU and thedifference in voltage voltages in the network based on the algorithm.

PMU, Distributed Generation, PSO Algorithm