All Stories

  1. A Reduced-Sensor Model Predictive Controller for a Single-Phase LCL Grid-Connected Inverter with State Estimator Based on Kalman Filter

    Article • October 2025, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  2. Fueling the transition: A comprehensive analysis of hydrogen roadmaps in Chile, Brazil and Colombia

    Article • Renewable and Sustainable Energy Reviews, October 2025, Elsevier

    PhD Helmo Kelis Morales Paredes

  3. Active Damping of LCL Resonance in Grid-Connected Inverters Through Capacitor–Voltage Feedback and the Parks–McClellan Algorithm

    Article • IEEE Journal of Emerging and Selected Topics in Power Electronics, June 2025, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  4. Current Control in Field-Excited Flux Switching Machines: No-Load Induced Voltage Impact Based on the Winding Connection

    Article • Eletrônica de Potência, February 2025, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes

  5. Contribuições ao Sistema de Gerenciamento de Potência em Plataformas FPSO através do Controle Coordenado de Conversores Multifuncionais

    Article • Eletrônica de Potência, February 2025, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes

  6. Self-Stabilization of Grid-Connected Inverters by Means of an Impedance-Based Adaptive Controller

    Article • IEEE Open Journal of Industry Applications, January 2025, Institute of Electrical & Electronics Engineers (IEEE)

    Jose Pomilio, PhD Helmo Kelis Morales Paredes

  7. Estimation of the Double-Cage Model for Three-Phase Induction Machines Using Decision Tree-Based Algorithms

    Article • IEEE Open Journal of the Industrial Electronics Society, January 2025, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  8. Non-Invasive Approach to Harmonic Responsibility Assignment Based on Conservative Power Theory

    Article • IEEE Transactions on Power Delivery, October 2024, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  9. Methodology to Estimate the Financial Impacts of the Integration of PV Generators in Distribution Systems on Voltage Sags and Energy Losses

    Article • IEEE Transactions on Power Delivery, April 2024, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  10. Design and Implementation of a Smart Campus Flexible Internet of Things Architecture on a Brazilian University

    Article • IEEE Access, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  11. Overview of Big Data Analytics in Power Quality Analysis and Assessment

    Article • January 2024, Springer Science + Business Media

    PhD Helmo Kelis Morales Paredes

  12. Power Quality Improvement in Commercial and Industrial Sites: An Integrated Approach Mitigating Power Oscillations

    Article • IEEE Access, January 2024, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  13. Distributed Control Scheme for Clusters of Power Quality Compensators in Grid-Tied AC Microgrids

    Article • Sustainability, November 2023, MDPI AG

    PhD Helmo Kelis Morales Paredes

  14. Enlightening Load Modeling by Means of Power Factor Decompositions

    Article • Energies, May 2023, MDPI AG

    PhD Helmo Kelis Morales Paredes

  15. Towards technical and economic feasibility of power quality compensators

    Article • Electric Power Systems Research, March 2023, Elsevier

    PhD Helmo Kelis Morales Paredes

  16. A Novel Methodology to Estimate Probability Density Function of Voltage Sag Duration and Failure Rates on Power Distribution Systems

    Article • IEEE Access, January 2023, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  17. Enhanced Control Strategy Based on Virtual Impedance Loops to Achieve the Sharing of Imbalance and Harmonic in 3-Phase 4-Wire Isolated Microgrids

    Article • IEEE Transactions on Power Delivery, August 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  18. Automated Switch Placement in Power Distribution Systems: Analysis of Binary PSO Parameters

    Article • June 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  19. Impact of Distributed Energy Resources on Fault Location, Isolation, and Service Restoration

    Article • June 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  20. Improving PV Hosting Capacity by Implementing Energy Storage Systems on Distribution Networks

    Article • May 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  21. Conservative Power Theory for Harmonic Voltage Responsibility Assignment

    Article • IEEE Latin America Transactions, March 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  22. Consensus-Based Single-Phase Control of Three-Phase Inverter for Current Sharing in Three-Phase Four-Wire Isolated AC Microgrids

    Article • IEEE Access, January 2022, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  23. Vector Control Applied to Mitigate the Electromagnetic Torque Ripple in Doubly Fed Induction Generator

    Article • IEEE Transactions on Energy Conversion, December 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  24. Consensus-Based Distributed Control for Improving the Sharing of Unbalanced Currents in Three-phase Three-wire Isolated Microgrids

    Article • November 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  25. Enhanced health index for power transformers diagnosis

    Article • Engineering Failure Analysis, April 2021, Elsevier

    PhD Helmo Kelis Morales Paredes

  26. Cooperative Control of Power Quality Compensators in Microgrids

    Article • April 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  27. Comparative analysis of techniques for the limitation of compensation currents in multifunctional grid-tied inverters

    Article • International Journal of Electrical Power & Energy Systems, March 2021, Elsevier

    PhD Helmo Kelis Morales Paredes

  28. Modeling and Control of a Single-Phase Grid-Connected Inverter with LCL Filter

    Article • IEEE Latin America Transactions, February 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  29. Adaptive Power Factor Regulation Under Asymmetrical and Non-Sinusoidal Grid Condition With Distributed Energy Resource

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  30. CPT-Based Multi-Objective Strategy for Power Quality Enhancement in Three-Phase Three-Wire Systems Under Distorted and Unbalanced Voltage Conditions

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  31. COMPENSATION OF OSCILLATING INSTANTANEOUS POWER IN MODERN MICROGRIDS BASED ON THE CONSERVATIVE POWER THEORY

    Article • Eletrônica de Potência, August 2020, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes

  32. 3-Phase Multi-Functional Grid-Tied Inverter for Compensation of Oscillating Instantaneous Power

    Article • December 2019, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  33. Disturbing Load Classification Based on the Grey Relational Analysis Method and Load Performance Index

    Article • Journal of Control Automation and Electrical Systems, September 2019, Springer Science + Business Media

    PhD Helmo Kelis Morales Paredes

  34. Selective Power Conditioning in Two-Phase Three-Wire Systems Based on the Conservative Power Theory

    Article • September 2019, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  35. Direct Connection of Supercapacitor–Battery Hybrid Storage System to the Grid-Tied Photovoltaic System

    Article • IEEE Transactions on Sustainable Energy, July 2019, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  36. Enhanced Dual-Spectrum Line Interpolated FFT with Four-Term Minimal Sidelobe Cosine Window for Real-Time Harmonic Estimation in Synchrophasor Smart-Grid Technology

    Article • Electronics, February 2019, MDPI AG

    Dr Marcelo G Simoes , PhD Helmo Kelis Morales Paredes

  37. Intelligent Expert System for Power Quality Improvement Under Distorted and Unbalanced Conditions in Three-Phase AC Microgrids

    Article • IEEE Transactions on Smart Grid, November 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  38. Centralized Control Center Implementation for Synergistic Operation of Distributed Multifunctional Single-Phase Grid-Tie Inverters in a Microgrid

    Article • IEEE Industrial Electronics Magazine, October 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  39. Trends and Constraints on Brazilian Photovoltaic Industry: Energy Policies, Interconnection Codes, and Equipment Certification

    Article • IEEE Transactions on Industry Applications, September 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  40. Currents' physical components (CPC): Case studies in single phase systems

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  41. Currents' physical components (CPC): Case studies in three phase systems

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  42. Proposal and implementation of a low cost single phase power meter

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  43. Synergistic operation between battery energy storage and photovoltaic generator systems to assist management of microgrids

    Article • IET Generation Transmission & Distribution, April 2018, the Institution of Engineering and Technology (the IET)

    Dr Marcelo G Simoes , Jose Pomilio, Dr Tiago Davi Curi Busarello, PhD Helmo Kelis Morales Paredes

  44. Simplified Small-Signal Model for Output Voltage Control of Asymmetric Cascaded H-Bridge Multilevel Inverter

    Article • IEEE Transactions on Power Electronics, April 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Dr Marcelo G Simoes , Dr Tiago Davi Curi Busarello, PhD Helmo Kelis Morales Paredes, Jose Pomilio

  45. Power Quality Study and Analysis of Different Arc Welding Machines

    Article • Journal of Control Automation and Electrical Systems, January 2018, Springer Science + Business Media

    PhD Helmo Kelis Morales Paredes

  46. Evaluation of Pattern Recognition Algorithms for Applications on Power Factor Compensation

    Article • Journal of Control Automation and Electrical Systems, December 2017, Springer Science + Business Media

    PhD Helmo Kelis Morales Paredes

  47. Interactive android application for education in AC-to-DC converters

    Article • November 2017, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  48. Low cost digital module for demonstration of modulation strategies in DC-to-AC converters

    Article • November 2017, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  49. Experimental Evaluation of a CPT-Based Four-Leg Active Power Compensator for Distributed Generation

    Article • IEEE Journal of Emerging and Selected Topics in Power Electronics, June 2017, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  50. Multifunctional operation of current controlled VSI based on the harmonic content of PCC voltage

    Article • April 2017, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  51. PV Microgeneration Perspective in Brazil: Approaching Interconnection Procedures and Equipment Certification

    Article • March 2017, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  52. Optimized Compensation of Unwanted Current Terms by AC Power Converters Under Generic Voltage Conditions

    Article • IEEE Industrial Electronics Magazine, December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  53. Strategy for flexible operation of three-phase converters

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  54. Making use of virtual instrumentation for the evaluation of Std-1459 and FBD method in three-phase four-wire circuits

    Article • November 2016, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  55. Control of Single-Phase Power Converters Connected to Low-Voltage Distorted Power Systems With Variable Compensation Objectives

    Article • IEEE Transactions on Power Electronics, March 2016, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  56. Flexible active compensation based on load conformity factors applied to non-sinusoidal and asymmetrical voltage conditions

    Article • IET Power Electronics, February 2016, the Institution of Engineering and Technology (the IET)

    Mr Danilo Iglesias Brandao, PhD Helmo Kelis Morales Paredes

  57. Applying conservative power theory for analyzing three-phase X-ray machine impact on distribution systems

    Article • Electric Power Systems Research, December 2015, Elsevier

    PhD Helmo Kelis Morales Paredes

  58. Strategy For Dynamic Saturation Of The Capacity Of Multifunctional Power Converters Connected To Utility Grid

    Article • Eletrônica de Potência, November 2015, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  59. About power factor and THDi in the smart micro-grid scenario

    Article • November 2015, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  60. Adaptive saturation system for grid-tied inverters in low voltage residential micro-grids

    Article • June 2015, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  61. Methodology for defining effective power factor compensation in three-phase systems

    Article • June 2015, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  62. Optimized compensation based on linear programming applied to distributed electronic power processors

    Article • June 2015, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  63. Multifunctional Current Reference Generation Strategy for Grid-tied Power Electronic Converter

    Article • PRZEGLĄD ELEKTROTECHNICZNY, March 2015, Wydawnictwo SIGMA-NOT, sp. z.o.o.

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  64. Multi-task control strategy for grid-tied inverters based on conservative power theory

    Article • IET Renewable Power Generation, March 2015, the Institution of Engineering and Technology (the IET)

    Mr Danilo Iglesias Brandao, PhD Helmo Kelis Morales Paredes

  65. Electrical modelling and power quality analysis of three-phase X-ray apparatus

    Article • June 2014, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  66. Electrical modelling and power quality analysis of three-phase induction furnace

    Article • May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  67. Load Characterization and Revenue Metering Under Non-Sinusoidal and Asymmetrical Operation

    Article • IEEE Transactions on Instrumentation and Measurement, February 2014, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  68. Flexible operation of grid-tied single-phase power converter

    Article • October 2013, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  69. Inverter control strategy for DG systems based on the Conservative power theory

    Article • September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  70. Design of static VAr compensator using a general reactive energy definition

    Article • June 2013, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes, Jose Pomilio

  71. Load analyser using conservative power theory

    Article • June 2013, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  72. Decoupled Reference Generator for Shunt Active Filters Using the Conservative Power Theory

    Article • Journal of Control Automation and Electrical Systems, May 2013, Springer Science + Business Media

    PhD Helmo Kelis Morales Paredes

  73. Application of Conservative Power Theory to load and line characterization and revenue metering

    Article • September 2012, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  74. Shunt Active Compensation Based On The Conservative Power Theory

    Article • Eletrônica de Potência, February 2012, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes

  75. Selection of Voltage Referential from the Power Quality and Apparent Power Points of View

    Article • September 2011, IntechOpen

    PhD Helmo Kelis Morales Paredes

  76. Accountability in Smart Microgrids Based on Conservative Power Theory

    Article • IEEE Transactions on Instrumentation and Measurement, September 2011, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  77. Shunt active compensation based on the Conservative Power Theory current's decomposition

    Article • September 2011, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  78. Conservative Power Theory, a Framework to Approach Control and Accountability Issues in Smart Microgrids

    Article • IEEE Transactions on Power Electronics, March 2011, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  79. Accountability and revenue metering in smart micro-grids

    Article • September 2010, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  80. Application of Conservative Power Theory to cooperative control of distributed compensators in smart grids

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  81. Conservative Power Theory, sequence components and accountability in smart grids

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  82. Possible shunt compensation strategies based on Conservative Power Theory

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  83. Three-phase four-wire circuits interpretation by means of different power theories

    Article • June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  84. Critical Evaluation Of Fbd, Pq And Cpt Current Decompositions For Four-wire Circuits

    Article • Eletrônica de Potência, November 2009, Associacao Brasileira de Eletronica de Potencia SOBRAEP

    PhD Helmo Kelis Morales Paredes

  85. Conservative power theory discussion and evaluation by means of virtual instrumentation

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  86. Critical evaluation of FBD, PQ and CPT current decompositions for four-wire circuits

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  87. Harmonic, reactive and unbalance compensation by means of CPT framework

    Article • September 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  88. A comparative analysis of FBD, PQ and CPT current decompositions — Part I: Three-phase, three-wire systems

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  89. A comparative analysis of FBD, PQ and CPT current decompositions — Part II: Three-phase four-wire systems

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  90. Selective current compensators based on the Conservative Power Theory

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes

  91. The Influence of Voltage Referential in Power Quality Indices Evaluation

    Article • IEEE Latin America Transactions, March 2008, Institute of Electrical & Electronics Engineers (IEEE)

    PhD Helmo Kelis Morales Paredes