Notice of Violation of IEEE Publication PrinciplesImpedance matrix approach to stochastic assessment for balanced and unbalanced voltage sags on transmission networks

Notice of Violation of IEEE Publication Principles

"Impedance Matrix Approach to Stochastic Assessment for Balanced and Unbalanced Voltage Sags on Transmission Networks"
by R. Jeya Gopi, V.K. Ramachandaramurthy, and M.T. Au
in the Proceedings of the International Conference on Power Electronics and Drive Systems, (PEDS) November 2009, pp. 115-120

After careful and considered review of the content and authorship of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE\´s Publication Principles.

This paper contains significant portions of text from the paper cited below that were copied and paraphrased without attribution.

"An Analytical Approach for Stochastic Assessment of Balanced and Unbalanced Voltage Sages in Large Systems"
by Elisa Espinosa Juarez and Araceli Hernandez
in the IEEE Transactions on Power Delivery, Vol 21, No 3, July 2006, pp. 1493-1500

Stochastic assessment is a method to predict the severity and number of voltage sags at a bus of interest in the transmission network system. In this paper, an analytical technique using impedance matrix is developed to predict the voltage magnitudes due to balanced and unbalanced faults at unlimited buses in an electrical network. The proposed technique was applied to an IEEE 24-buses electrical network to illustrate its application. The results show that the proposed technique is able to predict the voltage magnitude at any buses and the number of sags per year.