Table of Contents
ISRN Power Engineering
Volume 2013, Article ID 871827, 10 pages
Research Article

Real-Time State Estimation in the Cameroon Power System

Automation and Control Laboratory, National Advanced School of Engineering, University of Yaounde 1, B.P. 8390 Yaounde, Cameroon

Received 14 May 2013; Accepted 30 June 2013

Academic Editors: A. R. Beig, H. Ghezel-Ayagh, and D. Zhang

Copyright © 2013 Emmanuel Tanyi and Edwin Mbinkar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An important tool for the energy management system (EMS) is state estimation. Based on measurements taken throughout the network, state estimation gives an estimation of the state variables of the power system while checking that these estimates are consistent with the measurements. Currently, in the Cameroon power system, state estimates have been provided by ad hoc supervisory control and data acquisition (SCADA) systems. A disadvantage is that the measurements are not synchronised, which means that state estimation is not very precise during dynamic phenomena in the network. In this paper, real-time phasor measurement units (PMUs) that provide synchronised phasor measurements are proposed for integration into the power system. This approach addresses two important issues associated with the power system state estimation, namely, that of measurement accuracy and that of optimization of the number of measurement sites, their location, and the importance given to their measurements on the dynamic state estimation.