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Solution of numerical oscillations problems in the voltage- and frequency-dependent line model (VFDLM) and application of parallel simulation

Grant number: 21/11726-9
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): October 01, 2022
Effective date (End): March 27, 2023
Field of knowledge:Engineering - Electrical Engineering - Power Systems
Principal researcher:Maria Cristina Dias Tavares
Grantee:Thassio Matias Pereira
Supervisor abroad: Aniruddha Madhukar Gole
Home Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Research place: University of Manitoba, Canada  
Associated to the scholarship:19/20311-7 - Development of a new model to represent polyphasic transmission lines in Electromagnetic Transients Programs (EMT), BP.DR


To solve the difficulties related of corona effect representation in EMT-type programs, the PhD candidate and his supervisor has recently proposed a new approach, which is named Voltage- and Frequency-dependent Line Model (VFDLM). Representing the line directly in the phase domain, the VFDLM is a very robust line model based on a pseudo-nonlinear version of the well-known Universal Line Model (ULM), which couples the corona effect and frequency-dependence representation of line parameters directly in the line model. In the current stage, the VFDLM was totally implemented and validated to single-phase lines, and proves to be a stable, accurate and efficient approach to corona effect representation in EMT-type platforms. However, during the expansion of the model to multiphase transmission lines the VFDLM has presented some numerical oscillations problems, whose causes are not fully understood by the authors. Furthermore, simulations with the multiphase version of VFDLM is highly time consuming. In this way, the goal of this Doctorate Research Internship Abroad is to reduce the time consumption of multiphase version of VFDLM via parallel computing and solve the numerical oscillations problems of the model. Thereby, collaboration with Professor Aniruddha M. Gole from University of Manitoba in Winnipeg-Canada is an excellent choice. Since 80s, Professor Gole carries out important contributions related to parallel simulation and solutions of instabilities and numerical oscillations problems in EMT-type programs. It should be noted that the capacity obtained during the BEPE-DR could be applied not only in this project, but also in different power system problems. (AU)

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