An improved model in optimal PMU placement considering sensitivity analysis

In this paper, an improved model for completed observability in optimal PMU placement is presented. The proposed model is capable of obtaining the full set of optimal solutions instead of only one or partial solutions. A novel and topology-based method is suggested when zero-injection buses are considered in power grid. The integer linear programming approach is implemented to solve this model. In addition to the goal minimizing the number of PMUs, the sensitivity indicator is developed and introduced into the PMU placement in order to enhance the security of the power system networks. The model is tested in IEEE-14, 30, 57 and 118 buses systems. The simulation results are confirmed with the schemes concluded from authoritative publications. This model characterized by multi-solution provides convenience and flexibility to power company making a practical decision in PMUs´ locations.