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Power systems state estimation: the geometrical view applied to the processing of topological errors

Grant number: 15/15274-4
Support Opportunities:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): November 01, 2015
Effective date (End): October 30, 2016
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal Investigator:Newton Geraldo Bretas
Grantee:Breno Elias Bretas de Carvalho
Supervisor: Arturo Suman Bretas
Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Research place: University of Florida, Gainesville (UF), United States  
Associated to the scholarship:13/07976-3 - Power Systems State Estimation: A Geometrical View in the Processing of Topological Errors, BP.DR


This project was proposed with the objective to implement a computational tool to estimate the state (nodal complex voltages) of an electrical power system and apply alternative methods for the processing of topological errors, network parameter errors and/or measurements bad data based on the geometrical approach of the errors and on the innovation concept of the measurements. The methodology applied to solve the state estimation problem is the Weighted Least Squares (WLS). Through the geometrical approach, [1-4] have shown mathematically that the measurement error is composed of detectable and undetectable components and that the methods applied heretofore for processing errors consider only detectable component of the error and, consequently, may fail. In an attempt to circumvent this limitation, and based on the papers mentioned below, an alternative approach will be studied and implemented to process such errors. This approach is based on the analysis of the components of the measurements errors, as shown in [4] and [5]. Firstly, the software tests if the set of measurements has errors using, for this purpose, the value of the composed measurement error (CMEN). Then, it differs which type of error, or more than one type of error, has occurred. The correction to be made in the line parameter, or in the measurement with gross errors, is the corresponding composed normalized error (CNE). The proposed approach in this project requires only a set of measurements of a single "snapshot". To validate the software, several simulations, with different error scenarios, will be performed in the IEEE 14-bus and 57-bus systems. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CARVALHO, BRENO; BRETAS, NEWTON; BRETAS, ARTURO; IEEE. A Local State Vector Augmentation Technique for Processing Network Parameters Frrors. 2017 IEEE POWER & ENERGY SOCIETY GENERAL MEETING, v. N/A, p. 5-pg., . (15/15274-4)
BRETAS, ARTURO S.; BRETAS, NEWTON G.; CARVALHO, BRENO; BAEYENS, ENRIQUE; KHARGONEKAR, PRAMOD P.. Smart grids cyber-physical security as a malicious data attack: An innovation approach. Electric Power Systems Research, v. 149, p. 210-219, . (15/15274-4)
BRETAS, ARTURO S.; BRETAS, NEWTON G.; CARVALHO, BRENO E. B.. Further contributions to smart grids cyber-physical security as a malicious data attack: Proof and properties of the parameter error spreading out to the measurements and a relaxed correction model. INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, v. 104, p. 43-51, . (15/15274-4)

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