Strength-constrained unit commitment in IBR dominant power systems
In this paper, a strength-constrained unit commitment (UC) model incorporating system strength constraints based on the weighted short-circuit ratio (WSCR) is proposed. This model facilitates the comprehensive assessment of area-wide system strength in power systems with high inverter-based resource...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-06-01
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| Series: | iEnergy |
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| Online Access: | https://www.sciopen.com/article/10.23919/IEN.2025.0011 |
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| author | Yong-Kyu Kim Sang-Ho Lee Gyu-Sub Lee |
| author_facet | Yong-Kyu Kim Sang-Ho Lee Gyu-Sub Lee |
| author_sort | Yong-Kyu Kim |
| collection | DOAJ |
| description | In this paper, a strength-constrained unit commitment (UC) model incorporating system strength constraints based on the weighted short-circuit ratio (WSCR) is proposed. This model facilitates the comprehensive assessment of area-wide system strength in power systems with high inverter-based resource (IBR) penetration, thereby contributing to the mitigation of weak grid issues. Unlike traditional models, this approach considers the interactions among multiple IBRs. The UC problem is initially formulated as a mixed-integer nonlinear programming (MINLP) model, reflecting WSCR and bus impedance matrix modification constraints. To enhance computational tractability, the model is transformed into a mixed-integer linear programming (MILP) form. The effectiveness of the proposed approach is validated through simulations on the IEEE 5-bus, IEEE 39-bus, and a modified Korean power system, demonstrating the ability of the proposed UC model enhancing system strength compared to the conventional methodologies. |
| format | Article |
| id | doaj-art-d9d5cf30e787493a9c97fbcafea3fde0 |
| institution | Kabale University |
| issn | 2771-9197 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | iEnergy |
| spelling | doaj-art-d9d5cf30e787493a9c97fbcafea3fde02025-08-20T03:29:24ZengTsinghua University PressiEnergy2771-91972025-06-014212113110.23919/IEN.2025.0011Strength-constrained unit commitment in IBR dominant power systemsYong-Kyu Kim0Sang-Ho Lee1Gyu-Sub Lee2Korea Electrotechnology Research Institute, Uiwang, Gyeonggi-do 16029, Republic of KoreaKorea Electrotechnology Research Institute, Uiwang, Gyeonggi-do 16029, Republic of KoreaSchool of Electrical and Computer Engineering, Seoul National University, Seoul 08826, Republic of KoreaIn this paper, a strength-constrained unit commitment (UC) model incorporating system strength constraints based on the weighted short-circuit ratio (WSCR) is proposed. This model facilitates the comprehensive assessment of area-wide system strength in power systems with high inverter-based resource (IBR) penetration, thereby contributing to the mitigation of weak grid issues. Unlike traditional models, this approach considers the interactions among multiple IBRs. The UC problem is initially formulated as a mixed-integer nonlinear programming (MINLP) model, reflecting WSCR and bus impedance matrix modification constraints. To enhance computational tractability, the model is transformed into a mixed-integer linear programming (MILP) form. The effectiveness of the proposed approach is validated through simulations on the IEEE 5-bus, IEEE 39-bus, and a modified Korean power system, demonstrating the ability of the proposed UC model enhancing system strength compared to the conventional methodologies.https://www.sciopen.com/article/10.23919/IEN.2025.0011unit commitmentsystem strengthinverter-based resourcepower system stabilitymixed-integer programming |
| spellingShingle | Yong-Kyu Kim Sang-Ho Lee Gyu-Sub Lee Strength-constrained unit commitment in IBR dominant power systems iEnergy unit commitment system strength inverter-based resource power system stability mixed-integer programming |
| title | Strength-constrained unit commitment in IBR dominant power systems |
| title_full | Strength-constrained unit commitment in IBR dominant power systems |
| title_fullStr | Strength-constrained unit commitment in IBR dominant power systems |
| title_full_unstemmed | Strength-constrained unit commitment in IBR dominant power systems |
| title_short | Strength-constrained unit commitment in IBR dominant power systems |
| title_sort | strength constrained unit commitment in ibr dominant power systems |
| topic | unit commitment system strength inverter-based resource power system stability mixed-integer programming |
| url | https://www.sciopen.com/article/10.23919/IEN.2025.0011 |
| work_keys_str_mv | AT yongkyukim strengthconstrainedunitcommitmentinibrdominantpowersystems AT sangholee strengthconstrainedunitcommitmentinibrdominantpowersystems AT gyusublee strengthconstrainedunitcommitmentinibrdominantpowersystems |