Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids
Existing grid-forming inverter control schemes for distributed energy resources (DERs) primarily rely on active power (P)-frequency (f) and reactive power (Q)-voltage (V) droop mechanisms that are tailored for highly inductive transmission grids. However, in weak distribution grids where P and Q are...
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IEEE
2024-01-01
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| Series: | IEEE Open Access Journal of Power and Energy |
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| Online Access: | https://ieeexplore.ieee.org/document/10418138/ |
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| author | Lina He Shiwen Yu |
| author_facet | Lina He Shiwen Yu |
| author_sort | Lina He |
| collection | DOAJ |
| description | Existing grid-forming inverter control schemes for distributed energy resources (DERs) primarily rely on active power (P)-frequency (f) and reactive power (Q)-voltage (V) droop mechanisms that are tailored for highly inductive transmission grids. However, in weak distribution grids where P and Q are highly coupled due to their resistive network characteristics, these control schemes cannot provide independent and accurate f and V regulation. This will further deteriorate the dynamic and stability performance, potentially resulting in inverter and load tripping during disturbances. To address this challenge, this paper proposes an innovative decoupling grid-forming control scheme, which is designed based on a systematic perspective that considers the inherent coupling characteristic of the entire distribution grid. The small-signal stability of the proposed controller is analyzed by varying controller parameters and the grid strength. The effectiveness of this controller is comprehensively verified using both MATLAB and OPAL-RT platforms by comparing it with existing grid-forming control strategies. The results show that the proposed controller can effectively decouple P and Q regulation in weak distribution grids. It enables DERs to provide independent, accurate, and autonomous f and V regulation, thus improving grid stability and dynamics. The proposed control strategy is cost-effective, communication-free, and can be easily commercialized due to its straightforward and robust circuit design. |
| format | Article |
| id | doaj-art-41de02b1cf284edea2a29ac690c50bc0 |
| institution | Kabale University |
| issn | 2687-7910 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
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| series | IEEE Open Access Journal of Power and Energy |
| spelling | doaj-art-41de02b1cf284edea2a29ac690c50bc02025-01-21T00:03:14ZengIEEEIEEE Open Access Journal of Power and Energy2687-79102024-01-0111273910.1109/OAJPE.2024.336085410418138Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution GridsLina He0https://orcid.org/0000-0001-6582-9352Shiwen Yu1https://orcid.org/0000-0002-8514-3195Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USADepartment of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, IL, USAExisting grid-forming inverter control schemes for distributed energy resources (DERs) primarily rely on active power (P)-frequency (f) and reactive power (Q)-voltage (V) droop mechanisms that are tailored for highly inductive transmission grids. However, in weak distribution grids where P and Q are highly coupled due to their resistive network characteristics, these control schemes cannot provide independent and accurate f and V regulation. This will further deteriorate the dynamic and stability performance, potentially resulting in inverter and load tripping during disturbances. To address this challenge, this paper proposes an innovative decoupling grid-forming control scheme, which is designed based on a systematic perspective that considers the inherent coupling characteristic of the entire distribution grid. The small-signal stability of the proposed controller is analyzed by varying controller parameters and the grid strength. The effectiveness of this controller is comprehensively verified using both MATLAB and OPAL-RT platforms by comparing it with existing grid-forming control strategies. The results show that the proposed controller can effectively decouple P and Q regulation in weak distribution grids. It enables DERs to provide independent, accurate, and autonomous f and V regulation, thus improving grid stability and dynamics. The proposed control strategy is cost-effective, communication-free, and can be easily commercialized due to its straightforward and robust circuit design.https://ieeexplore.ieee.org/document/10418138/Decoupling controlgrid-formingutility-scale DERsweak distribution gridsfrequency and voltage regulation |
| spellingShingle | Lina He Shiwen Yu Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids IEEE Open Access Journal of Power and Energy Decoupling control grid-forming utility-scale DERs weak distribution grids frequency and voltage regulation |
| title | Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids |
| title_full | Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids |
| title_fullStr | Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids |
| title_full_unstemmed | Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids |
| title_short | Systematic Decoupling Grid-Forming Control for Utility-Scale Inverter-Based Distributed Energy Resources in Weak Distribution Grids |
| title_sort | systematic decoupling grid forming control for utility scale inverter based distributed energy resources in weak distribution grids |
| topic | Decoupling control grid-forming utility-scale DERs weak distribution grids frequency and voltage regulation |
| url | https://ieeexplore.ieee.org/document/10418138/ |
| work_keys_str_mv | AT linahe systematicdecouplinggridformingcontrolforutilityscaleinverterbaseddistributedenergyresourcesinweakdistributiongrids AT shiwenyu systematicdecouplinggridformingcontrolforutilityscaleinverterbaseddistributedenergyresourcesinweakdistributiongrids |