Browsing by Author "Coury, Denis V."

Now showing items 1-15 of 15

    • 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 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Proportional-resonant controller applied to modular multilevel converter for HVDC systems 

      Albernaz Lacerda Freitas, Vinícius; Coury, Denis V.; Machado Monaro, Renato (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      Modular multilevel converters (MMC) are usually controlled by proportional-integral (PI) controllers. However, the PI controller has limitations such as the inability to track a sinusoidal reference without incurring ...

    • Selective nonunit protection technique for multiterminal VSC-HVDC grids 

      Bertho, Rui; Albernaz Lacerda Freitas, Vinícius; Machado Monaro, Renato; Melo Vieira, José Carlos; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2018-10)
      Article
      Open Access
      The development of multiterminal voltage-source converters high-voltage direct current (VSC-HVDC) grids poses a new challenge: A fast and selective protection algorithm for such grids must be implemented. Therefore, this ...

    • Short-circuit analytical model for modular multilevel converters considering DC cable capacitance 

      Albernaz Lacerda Freitas, Vinícius; Peña Alzola, Rafael; Campos Gaona, David; Machado Monaro, Renato; Anaya Lara, Olimpo; Coury, Denis V. (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Article
      Open Access
      Developing analytical short-circuit models for Modular Multilevel Converters (MMC) is not straightforward due to their switching and blocking characteristics. Short-circuit models for MMCs have been developed previously ...

    • Signal processing techniques for synchrophasors considering short-circuit signals: a comparative study 

      Albernaz Lacerda Freitas, Vinícius; Barbalho, Pedro Inácio de Nascimento e; Machado Monaro, Renato; Coury, Denis V. (2020-10)
      Article
      Open Access
      Synchrophasors represent the next step in the level of information available considering operation, protection, control and stability of power systems. Among the various different uses of synchrophasors, currently numerous ...

    • The impact of modular multilevel converter control on DC short-circuit currents of HVDC systems 

      Albernaz Lacerda Freitas, Vinícius; Coury, Denis V.; Suzuki, N; Machado Monaro, Renato (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      In Modular Multilevel Converter (MMC) based DC systems, during the initial stage of a DC fault, the control system operates normally, inserting and bypassing submodules. Consequently, each MMC control technique would provide ...