Browsing by Author "Albernaz Lacerda Freitas, Vinícius"Més informacióMés informació

Now showing items 1-20 of 29

    • A survey on the application of phasor measurement units to the protection of transmission and smart distribution systems 

      Menezes, Thiago Souza; Barra, Pedro Enrique Aquino; Dizioli, F. A. S.; Albernaz Lacerda Freitas, Vinícius; Fernandes, Ricardo Augusto Souza; Coury, Denis V. (2023-08-07)
      Article
      Open Access
      Renewable energy resources have increasingly been integrated into electric power grids. Moreover, new challenges constantly arise, showing the need for modernization in monitoring, control, and protection. Transmission and ...

    • An approximated analytical model for pole-to-ground faults in symmetrical monopole MMC-HVDC systems 

      Albernaz Lacerda Freitas, Vinícius; Machado Monaro, Renato; Campos Gaona, David; Peña Alzola, Rafael; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2021-12)
      Article
      Open Access
      Developing pole-to-ground (PG) fault models for Modular Multilevel Converters (MMC) is not straight forward due to the fault asymmetry and converter switching concerning blocking characteristics. Various studies have been ...

    • Analysis and mitigation of harmonic distortion in distribution networks by an active filter 

      Leonardo, Gustavo Henrique; Albernaz Lacerda Freitas, Vinícius; Oleskovicz, Mário (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      As a result of the presence of non-linear loads, it is possible to verify the increasing of harmonic distortion in electric power systems. When amplified, it can induce the resonance effect. This effect becomes more and ...

    • Analysis of harmonic distortion influence in a distributed synchronous generator 

      Casimiro, Renan; Albernaz Lacerda Freitas, Vinícius; Pavanello Bataglioli, Rodrigo; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      In conventional electrical systems, the generators are located far from the load centers. However, considering the distributed generation, the impact of harmonic distortion in the generators cannot be neglected.Thus, this ...

    • Analysis of signal processing techniques for high impedance fault detection in distribution systems 

      Nunes Lopes, Gabriela; Albernaz Lacerda Freitas, Vinícius; Melo Vieira, José Carlos; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2021-12)
      Article
      Restricted access - publisher's policy

    • Analysis of the contribution of a battery bank to voltage regulation in a distribution system 

      Barbalho, Pedro Inácio de Nascimento e; Albernaz Lacerda Freitas, Vinícius; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      Due to demand of higher power quality, reliability and efficiency levels, the penetration of distributed energy resources increased through the past years. Thus, several studies on the different types of electrical energy ...

    • Comparative analysis of fault detection and classification techniques for HVDC grids protection 

      Albernaz Lacerda Freitas, Vinícius; Campos Gaona, David; Peña Alzola, Rafael; Machado Monaro, Renato; Coury, Denis V.; Anaya Lara, Olimpo (The Institution of Engineering and Technology (IET), 2020)
      Conference report
      Restricted access - publisher's policy
      Dealing with high short-circuit currents with a fast rise rate in Voltage Source Converters (VSCs) still poses as a challenge for High Voltage Direct Current (HVDC) multiterminal system (MTDC) reliability. Several fault ...

    • Control-based fault current limiter for modular multilevel voltage-source converters 

      Albernaz Lacerda Freitas, Vinícius; Machado Monaro, Renato; Peña Alzola, Rafael; Campos Gaona, David; Coury, Denis V.; Anaya Lara, Olimpo (Elsevier, 2020-06)
      Article
      Restricted access - publisher's policy
      The sharp rise in short-circuit currents of voltage-source converters is still a challenge for DC grid reliability, which imposes stringent requirements on DC breakers. Therefore, fault current limiters are used for slowing ...

    • Deep reinforcement learning-based secondary control for microgrids in islanded mode 

      Barbalho, Pedro Inácio de Nascimento e; Albernaz Lacerda Freitas, Vinícius; Fernandes, Ricardo Augusto Souza; Vinicius Coury, Denis (2022-11-01)
      Article
      Open Access
      Microgrids are generally low-inertia systems with a high penetration of renewable energy sources. The design of advanced control structures is required to keep these grids’ electrical variables within an acceptable range. ...

    • Definition of scenarios for modern power systems with a high renewable energy share 

      Collados Rodríguez, Carlos; Antolí Gil, Eduard; Sánchez Sánchez, Enric; Girona Badia, Jaume; Albernaz Lacerda Freitas, Vinícius; Cheah Mañé, Marc; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (2023-02-28)
      Article
      Open Access
      Recent environmental policies have led academic, industrial, and governmental stakeholders to plan scenarios with a high share of renewable energy sources (RES), to ensure that future energy systems, composed mostly of ...

    • Distance protection algorithm for multiterminal HVDC systems using the Hilbert–Huang transform 

      Albernaz Lacerda Freitas, Vinícius; Machado Monaro, Renato; Campos Gaona, David; Coury, Denis V.; Anaya Lara, Olimpo (2020-08)
      Article
      Open Access
      Multiterminal high-voltage direct current (HVDC) systems still need advances in terms of protection in order to improve their reliability. In this context, the distance protection can play a major role by adding selectivity ...

    • Enhancing the AC network stability with a grid-forming control for single-stage PV inverter 

      Girona Badia, Jaume; Albernaz Lacerda Freitas, Vinícius; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (Elsevier, 2024-10)
      Article
      Open Access
      This article proposes a PLL-less grid-forming (GFor) control for a PV central power plant topology designed to maintain the DC voltage and improve the AC voltage stability. The PV single-stage or central topology stands ...

    • Grid-forming loads: can the loads be in charge of forming the grid in modern power systems? 

      Gomis Bellmunt, Oriol; Dadjo Tavakoli, Saman; Albernaz Lacerda Freitas, Vinícius; Prieto Araujo, Eduardo (2022-08-29)
      Article
      Open Access
      Modern power systems are facing the tremendous challenge of integrating vast amounts of variable (non-dispatchable) renewable generation capacity, such as solar photovoltaic or wind power. In this context, the required ...

    • Grid-forming services from hydrogen electrolyzers 

      Dadjo Tavakoli, Saman; Ghazavidozein, Mehdi; Albernaz Lacerda Freitas, Vinícius; Cheah Mañé, Marc; Prieto Araujo, Eduardo; Mancarella, Pierluigi; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2023-01-01)
      Article
      Open Access
      Hydrogen electrloyzers are power-to-gas storage devices that can facilitate large-scale integration of intermittent renewable sources into the future power systems. Due to their fast response and capability to operate in ...

    • LCL filter design for VSC-HVDC systems supplying passive grids 

      Albernaz Lacerda Freitas, Vinícius; Coury, Denis V.; Machado Monaro, Renato (Elsevier, 2017-11)
      Article
      Open Access
      This paper presents an LCL passive filter design methodology for high voltage direct current systems based on voltage source converters (VSC-HVDC) connected to passive grids. Power quality of passive grids is largely ...

    • Limitations on the virtual inertia provision from grid-forming-connected renewable energy sources 

      Girona Badia, Jaume; Albernaz Lacerda Freitas, Vinícius; Prieto-Araujo, E.; Gomis Bellmunt, Oriol (2023)
      Conference report
      Restricted access - publisher's policy
      This paper addresses the limitations of virtual inertia provision from grid-forming interconnected renewable energy sources considering AC grid and resources dynamics. The instantaneous power that the grid-forming can ...

    • Modelling and simulation of power systems with grid-connected converters in OpenModelica 

      Figures Llerins, Lluc; Albernaz Lacerda Freitas, Vinícius; Prieto-Araujo, E.; Gomis Bellmunt, Oriol; Guironnet, Adrian; Cossart, Quentin (2022)
      Conference report
      Restricted access - publisher's policy
      This paper analyses the capabilities of the Open-Modelica environment to perform electromagnetic transient (EMT) type simulations of power transmission systems with grid-connected converters. A power transmission system ...

    • Modelling approaches of power systems considering grid-connected converters and renewable generation dynamics 

      Girona Badia, Jaume; Albernaz Lacerda Freitas, Vinícius; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol; Kusche, Stephan; Poschke, Florian; Schulte, Horst (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Conference report
      Restricted access - publisher's policy
      This paper presents a comparative analysis of several modelling approaches of key elements used in simulations of power systems with renewable energy sources. Different models of synchronous generators, transmission lines, ...

    • Multi-agent system-based microgrid protection using angular variation: An embedded approach 

      Dizioli, F. A. S.; Aquino Barra, Pedro Henrique; Menezes, Thiago Souza; Albernaz Lacerda Freitas, Vinícius; Coury, Denis V.; Souza Fernandes, Ricardo Augusto (Elsevier, 2023-07)
      Article
      Restricted access - publisher's policy
      This paper presents a new approach for protecting microgrids based on multi-agent systems and using the angular variation of currents. The multi-agent system was structured using a congregation organization with three ...

    • Non-unit distance protection algorithm for multiterminal MMC-HVdc systems using DC capacitor resonance frequency 

      Albernaz Lacerda Freitas, Vinícius; Machado Monaro, Renato; Pena Alzola, Rafael; Campos Gaona, David; Vinicius Coury, Denis (Institute of Electrical and Electronics Engineers (IEEE), 2022-01-06)
      Article
      Open Access
      High-voltage dc (HVdc) transmission has been largely used to interconnect asynchronous systems and integrate renewable energy resources into electrical grids. However, the high short-circuit currents and low-tolerance of ...