Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility
The conventional microgrid (MG) price-based operation scheme with respect to the hourly market price considers only profit maximization from energy transactions and disregards variability. This causes flexibility burdens on the main grid system operator (SO), which must then utilize its ramping capa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/12/18/3587 |
| _version_ | 1811306566040682496 |
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| author | Sunwoong Kim Dam Kim Yong Tae Yoon |
| author_facet | Sunwoong Kim Dam Kim Yong Tae Yoon |
| author_sort | Sunwoong Kim |
| collection | DOAJ |
| description | The conventional microgrid (MG) price-based operation scheme with respect to the hourly market price considers only profit maximization from energy transactions and disregards variability. This causes flexibility burdens on the main grid system operator (SO), which must then utilize its ramping capability to cover the net load variability. As the proportion of renewable energy sources (RESs) involving intermittency in MGs continues to increase owing to global energy policies, net load variability within shorter time intervals has also increased, making proper management guidelines necessary. Thus, this paper proposes an MG-SO variability contract on intra-hour and inter-hour time intervals for regulating variability such that the SO can support and distribute its relevant costs between the MG and the SO. To prove the effectiveness of the proposed contract, an MG variability contract-based scheduling model is also proposed, and the results were compared with those of the price-based model. A case study demonstrates that the introduction of RESs increases the variability in shorter intervals and that the suggested contract is effective in terms of decreasing the variability with increased MG operating costs. A sensitivity analysis between the reduced variability and additional operating costs was also conducted in the case study. |
| first_indexed | 2024-04-13T08:46:29Z |
| format | Article |
| id | doaj.art-5393e2c25f624861af09f3c4f682a23a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T08:46:29Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5393e2c25f624861af09f3c4f682a23a2022-12-22T02:53:38ZengMDPI AGEnergies1996-10732019-09-011218358710.3390/en12183587en12183587Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid FlexibilitySunwoong Kim0Dam Kim1Yong Tae Yoon2Department of Electrical and Computer Engineering, Seoul National University, Seoul 08826, KoreaDepartment of Statistics, Institute of Engineering Research, Seoul National University, Seoul 08826, KoreaDepartment of Electrical and Computer Engineering, Seoul National University, Seoul 08826, KoreaThe conventional microgrid (MG) price-based operation scheme with respect to the hourly market price considers only profit maximization from energy transactions and disregards variability. This causes flexibility burdens on the main grid system operator (SO), which must then utilize its ramping capability to cover the net load variability. As the proportion of renewable energy sources (RESs) involving intermittency in MGs continues to increase owing to global energy policies, net load variability within shorter time intervals has also increased, making proper management guidelines necessary. Thus, this paper proposes an MG-SO variability contract on intra-hour and inter-hour time intervals for regulating variability such that the SO can support and distribute its relevant costs between the MG and the SO. To prove the effectiveness of the proposed contract, an MG variability contract-based scheduling model is also proposed, and the results were compared with those of the price-based model. A case study demonstrates that the introduction of RESs increases the variability in shorter intervals and that the suggested contract is effective in terms of decreasing the variability with increased MG operating costs. A sensitivity analysis between the reduced variability and additional operating costs was also conducted in the case study.https://www.mdpi.com/1996-1073/12/18/3587microgrid operationgrid flexibilityvariability contracttie-line flow |
| spellingShingle | Sunwoong Kim Dam Kim Yong Tae Yoon Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility Energies microgrid operation grid flexibility variability contract tie-line flow |
| title | Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility |
| title_full | Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility |
| title_fullStr | Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility |
| title_full_unstemmed | Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility |
| title_short | Short-Term Operation Scheduling of a Microgrid under Variability Contracts to Preserve Grid Flexibility |
| title_sort | short term operation scheduling of a microgrid under variability contracts to preserve grid flexibility |
| topic | microgrid operation grid flexibility variability contract tie-line flow |
| url | https://www.mdpi.com/1996-1073/12/18/3587 |
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