Optimal Phasor Measurement Unit Placement for Complete Power System Observability Under Different Scenarios

The state estimation of a power system is possible through phasor measurement units (PMUs). But to keep the power system observable as well as reduce costs, optimal placement of PMUs is essential. This paper presents a method for optimal phasor measurement units for complete power system observability under different scenarios like the existence of backup phasor measurement units for each bus and placing phasor measurement units in some specific buses. The problem formulation is integer linear programming (ILP), and it is solved using the MATLAB environment. The proposed method is applied on four different test systems: IEEE 14-bus system, IEEE 30-bus system, IEEE 57-bus system, and IEEE 118-bus system. The results show that considering different scenarios causes better planning for the power system's observability according to the conditions and topology of each system and increases the flexibility of the system against possible adverse events and thus increases the reliability of the power system.