Papers by Patrick Panciatici
Wide deployment of sensing and actuation capabilities in the electric power grid, along with chan... more Wide deployment of sensing and actuation capabilities in the electric power grid, along with changing dynamical characteristics, are necessitating analysis of power-system swing dynamics from an input-output perspective. In this article, the input-output properties of the swing dynamics, including the finite and infinite zeros, are characterized from a dynamical-networks perspective. Specifically, an explicit algebraic characterization is given for a matrix whose eigenvalues are the zeros, and in turn structural and graph-theoretic conditions for the absence and presence of nonminimum phase dynamics are developed. Based on these structural results and also an illustrative example, it is demonstrated that the zeros of the swing dynamics are important for analyzing transients and oscillations in the power transmission network, using reduced-order models, and designing controls.
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Power systems dynamics are evolving very quickly due to a continuously rising number of power ele... more Power systems dynamics are evolving very quickly due to a continuously rising number of power electronic devices connected to the grid. In this context, ensuring power system stability emerges as a real challenge for Transmission System Operators (TSOs). In addition to that, the growing number of High-Voltage Direct-Current (HVDC) interconnections forces the TSOs to consider the interconnected neighboring countries in the scope of their simulations. In order to do so, TSOs need to be able to exchange dynamic models and to have access to an open and flexible power systems time-domain simulation tool. Most of the currently available tools have been designed as black boxes tailored for classical AC systems. In this paper, RTE proposes a new and flexible time-domain simulation tool that will soon be released open-source. This tool is based on two main principles: the use of the Modelica equation-based modeling language for the modeling part, and a clear separation between the modeling and the solving parts. This approach will set a framework for fruitful collaborations between all the Power System stakeholders, from universities to Transmission System Operators.
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IEEE Conference Proceedings, 2019
Measurement-based power system modal analysis is useful to operators in that alarms can be issued... more Measurement-based power system modal analysis is useful to operators in that alarms can be issued when the damping of some natural oscillatory modes becomes unacceptably low or when forced oscillations suddenly appear in a power system. Considering the fact that mitigating the mechanism of each mode or forced oscillation requires a specific remedial action, the mode estimates should be properly clustered and identified before such corrective actions can be decided. In this paper, the problem of clustering of estimates from an ambient oscillation monitoring algorithm into groupings representative of different system modes is addressed for the first time. The well-known DBSCAN method is applied for clustering the estimates. Archived results from three days of oscillation monitoring implementation in a real system, which were obtained from Fast Frequency Domain Decomposition (FFDD) modal analysis method in the Réseau de Transport d’Électricité (RTE) power system, are utilized for evaluation of the methodology.
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Electric Power Systems Research, Nov 1, 2022
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IEEE Transactions on Power Systems, 2023
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In this paper, we present a new version of the Sinusoidal Predictor Method, whose objective is to... more In this paper, we present a new version of the Sinusoidal Predictor Method, whose objective is to accelerate the EMT simulations of AC power systems. More precisely, it aims at using larger time steps to integrate the arising systems of differential algebraic equations. Contrary to main of the existing approaches, the SPM takes into account the sinusoidal behavior of oscillating components in the solver instead of the modeling part and so does not modify the original equations representing the simulated system. This methodology, which combines an estimation method with an adaptive step size integration scheme, allows us to use a wide range of step sizes varying from 1 μs in transients to 100 ms in steady-state. In this new version of the SPM, modifications have been provided to the estimation step: henceforth, the Fourier coefficients are computed by optimizing a measurement of the system stationarity. As a result, the number of iterations used for simulating a system is dramatically reduced compared to a standard integration scheme, especially in steady-state and during slow dynamics.
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2018 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe), 2018
In this paper, we present a new version of the Sinusoidal Predictor Method, whose objective is to... more In this paper, we present a new version of the Sinusoidal Predictor Method, whose objective is to accelerate the EMT simulations of AC power systems. More precisely, it aims at using larger time steps to integrate the arising systems of differential algebraic equations. Contrary to main of the existing approaches, the SPM takes into account the sinusoidal behavior of oscillating components in the solver instead of the modeling part and so does not modify the original equations representing the simulated system. This methodology, which combines an estimation method with an adaptive step size integration scheme, allows us to use a wide range of step sizes varying from 1 μs in transients to 100 ms in steady-state. In this new version of the SPM, modifications have been provided to the estimation step: henceforth, the Fourier coefficients are computed by optimizing a measurement of the system stationarity. As a result, the number of iterations used for simulating a system is dramatically reduced compared to a standard integration scheme, especially in steady-state and during slow dynamics.
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IFAC Proceedings Volumes, Sep 1, 2003
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Communications in computer and information science, 2021
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Electric Power Systems Research, Jul 1, 2017
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Voltage Source Converter-based transmission grids might be the future of power system with the in... more Voltage Source Converter-based transmission grids might be the future of power system with the increasing share of interfaced electricity generation. These systems should be able to support the utility grid autonomously. The present paper focuses on the VSC output filter design and internal control of filter states. Nested AC current and voltage loops are the state of the art for power converters, controlled as voltage sources, in Microgrid or UPS applications. These internal controls are candidates for future industrial implementation at high power level. However, in a VSC based transmission system, those controls will face various topologies while requiring robustness against transient events (load changes, line tripping, etc.). The following development aims at providing keys for designing a versatile internal control suitable for VSC-based transmission system.
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HAL (Le Centre pour la Communication Scientifique Directe), Sep 25, 2019
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arXiv (Cornell University), Sep 16, 2019
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HAL (Le Centre pour la Communication Scientifique Directe), Aug 27, 2017
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IEEE open access journal of power and energy, 2023
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Papers by Patrick Panciatici