Abstract—The most commonly used weighted least square state estimator in power industry is nonlinear and formulated by using conventional measurements such as line flow and injection measurement. The use of Phasor Measurement Units (PMUs) enhances the state estimation in terms of accuracy and fewer only are required for complete observability. The placement algorithm based on integer programming is used for the placement of PMUs in a network. Use of only PMUs for complete observability is not economical; in order to reduce the cost of installation placement of PMUs along with injection measurements in a conventional state estimation program will be discussed in this paper. The effect of adding injection measurements on number of PMUs used for network observability and also the state estimation solution accuracy will be studied. Case studies carried out on different size test systems are presented.

Index Terms—Hybrid state estimation, Network Observability, Phasor measurement units, State estimation

Cite: Anubhav Goel and Vivek Kumar, "PMU PLACEMENT STRATEGIES FOR NETWORK OBSERVABILITY AND BENEFITS GAINED IN STATE ESTIMATION," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 5, No. 3, pp. 16-24, July 2016.