Behrouz Moarref - Sama technical and vocational training college, Islamic Azad University, Dezfoul Branch, Dezfoul, Iran
Hassan Barati - Department of Electrical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran

Conventional phasor measurement unit (PMU) placement methods normally use the number of PMU installations as the objective function which is to be minimized. However, the cost of one installation of PMU is not always the same in different locations. It depends on a number of factors. One of these factors is taken into account in the proposed PMU placement method in this paper, which is the number of adjacent branches to the PMU located buses. Also in this paper, we propose a flow chart and indicators in order to find all solution and rank these multiple solutions, respectively. The proposed model is capable of obtaining the full set of optimal solutions instead of only one or partial solutions. In this paper Branch and Bound (B&B) method is used to optimal PMU placement to save finance. Numerical studies are conducted on the IEEE 14-bus system and the results are analyzed.

phasor measurement unit, optimal placement, observability, Branch and Bound