Selective Power Control in Grid-Connected AC Microgrids
The increasing penetration of nonlinear loads (NLLs) and distributed energy resources (DERs) in low-voltage grids poses challenges to power quality and grid hosting capacity (GHC). This article proposes a centralized multimode selective power control strategy for grid-connected ac microgrids (MGs) t...
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of the Industrial Electronics Society |
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| Online Access: | https://ieeexplore.ieee.org/document/11017508/ |
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| author | Joao Marcus S. Callegari Lucas S. Araujo Danilo I. Brandao |
| author_facet | Joao Marcus S. Callegari Lucas S. Araujo Danilo I. Brandao |
| author_sort | Joao Marcus S. Callegari |
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| description | The increasing penetration of nonlinear loads (NLLs) and distributed energy resources (DERs) in low-voltage grids poses challenges to power quality and grid hosting capacity (GHC). This article proposes a centralized multimode selective power control strategy for grid-connected ac microgrids (MGs) that does not require prior knowledge of MG parameters. The strategy enhances GHC and power quality across multiple MG nodes through coordinated control in two nonsimultaneous modes. In the centralized mode, a generalized power-based control algorithm enables selective harmonic/distortion power dispatch. This formulation improves disturbance rejection and accuracy in point of common coupling (PCC) power tracking. For the first time, feedback, feedforward, and disturbance decoupling actions are applied to distortion/harmonic power in MGs. In the decentralized mode, harmonic current compensation (HCC) is achieved without communication links, reducing data traffic via a selective voltage-detection-based approach. The proposed strategy enables (i) resistive load synthesis at the PCC to damp upstream grid resonances, (ii) sinusoidal current synthesis (SCS) for current quality enhancement and compliance with standards, and (iii) HCC based on voltage measurements to improve voltage quality at internal nodes. Comprehensive simulations evaluate reference tracking, disturbance rejection, grid short-circuit level effects, and mode transitions. Results show that in decentralized mode, PCC voltage THD improved from 10.65% to 1.09% under weak grids. In centralized mode, with SCS up to the 11th harmonic, PCC current THD was reduced from 61.18% to 3.42% under stiff grids. Experimental results confirm the feasibility of implementation in real MGs. |
| format | Article |
| id | doaj-art-3dea0a8d77a34f0f9e329e1ce1a17dd1 |
| institution | OA Journals |
| issn | 2644-1284 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
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| series | IEEE Open Journal of the Industrial Electronics Society |
| spelling | doaj-art-3dea0a8d77a34f0f9e329e1ce1a17dd12025-08-20T02:32:41ZengIEEEIEEE Open Journal of the Industrial Electronics Society2644-12842025-01-01693896110.1109/OJIES.2025.357502011017508Selective Power Control in Grid-Connected AC MicrogridsJoao Marcus S. Callegari0https://orcid.org/0000-0001-6264-351XLucas S. Araujo1https://orcid.org/0000-0001-9463-6699Danilo I. Brandao2https://orcid.org/0000-0002-5878-1167Graduate Program in Electrical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, BrazilDepartment of Energy Systems of SINTEF Energy Research, Trondheim, NorwayGraduate Program in Electrical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, BrazilThe increasing penetration of nonlinear loads (NLLs) and distributed energy resources (DERs) in low-voltage grids poses challenges to power quality and grid hosting capacity (GHC). This article proposes a centralized multimode selective power control strategy for grid-connected ac microgrids (MGs) that does not require prior knowledge of MG parameters. The strategy enhances GHC and power quality across multiple MG nodes through coordinated control in two nonsimultaneous modes. In the centralized mode, a generalized power-based control algorithm enables selective harmonic/distortion power dispatch. This formulation improves disturbance rejection and accuracy in point of common coupling (PCC) power tracking. For the first time, feedback, feedforward, and disturbance decoupling actions are applied to distortion/harmonic power in MGs. In the decentralized mode, harmonic current compensation (HCC) is achieved without communication links, reducing data traffic via a selective voltage-detection-based approach. The proposed strategy enables (i) resistive load synthesis at the PCC to damp upstream grid resonances, (ii) sinusoidal current synthesis (SCS) for current quality enhancement and compliance with standards, and (iii) HCC based on voltage measurements to improve voltage quality at internal nodes. Comprehensive simulations evaluate reference tracking, disturbance rejection, grid short-circuit level effects, and mode transitions. Results show that in decentralized mode, PCC voltage THD improved from 10.65% to 1.09% under weak grids. In centralized mode, with SCS up to the 11th harmonic, PCC current THD was reduced from 61.18% to 3.42% under stiff grids. Experimental results confirm the feasibility of implementation in real MGs.https://ieeexplore.ieee.org/document/11017508/Advanced microgrid (MG)centralized modedecentralized modedistortion powergeneralized power-based control (GPBC)harmonic power |
| spellingShingle | Joao Marcus S. Callegari Lucas S. Araujo Danilo I. Brandao Selective Power Control in Grid-Connected AC Microgrids IEEE Open Journal of the Industrial Electronics Society Advanced microgrid (MG) centralized mode decentralized mode distortion power generalized power-based control (GPBC) harmonic power |
| title | Selective Power Control in Grid-Connected AC Microgrids |
| title_full | Selective Power Control in Grid-Connected AC Microgrids |
| title_fullStr | Selective Power Control in Grid-Connected AC Microgrids |
| title_full_unstemmed | Selective Power Control in Grid-Connected AC Microgrids |
| title_short | Selective Power Control in Grid-Connected AC Microgrids |
| title_sort | selective power control in grid connected ac microgrids |
| topic | Advanced microgrid (MG) centralized mode decentralized mode distortion power generalized power-based control (GPBC) harmonic power |
| url | https://ieeexplore.ieee.org/document/11017508/ |
| work_keys_str_mv | AT joaomarcusscallegari selectivepowercontrolingridconnectedacmicrogrids AT lucassaraujo selectivepowercontrolingridconnectedacmicrogrids AT daniloibrandao selectivepowercontrolingridconnectedacmicrogrids |