Detection, identification and correction of transmission lines parameter errors considering the possibility of gross errors and the availability of PMUs.

• Grant number: 10/16174-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: December 01, 2010
• End date: November 30, 2013
• Field of knowledge: Engineering - Electrical Engineering - Power Systems
• Principal Investigator: Joao Bosco Augusto London Junior
• Grantee: Madeleine Rocio Medrano Castillo Albertini
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 11/01035-7 - Power system control and analysis, AP.TEM

Abstract

In the thesis of Madeleine Rocio Medrano Castillo Albertini it was developed an efficient off-line approach for network branch parameter (series and shunt admittances) errors detection, identification and correction. In comparison with other methodologies already proposed for branch parameters validation, the novel features of this off-line approach are the identification procedure of suspicious branches and the way the augmented state-parameter estimation problem is solved. Several simulation results (with IEEE bus systems) have demonstrated the high correctness and reliability of that off-line approach to deal with single and multiple parameter errors in adjacent (those having a terminal bus in common) and non-adjacent branches. Moreover the approach was also demonstrated on tests performed on the Hydro-Québec Trans-Énergie networks. One of these tests shows that approach enables the validation of series and shunt admittances of parallel transmission lines with series compensation. However, after the practical experience with the Hydro-Quebéc, it was observed the necessity of improving that approach, in the sense of enabling branch parameters validation considering some practical aspects.The objective of this project is to improve the off-line approach for branch parameters validation developed in the Thesis of Madeleine Rocio Medrano Castillo Albertini in order to obtain a new approach that enables: (i) distinguishing between bad data (bad analog measurements) and branch parameter errors; (ii) considering the variation of transmission line (or branch) resistance with both the temperature and the load; (iii) considering the parallel conductance of the transmission lines; and (iv) considering both conventional SCADA measurements and synchronized phasor measurements.