Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning
The operation planning of hydrothermal systems is characterized by high complexity due to the inherent temporal and spatial coupling of the problem. To address this complexity, the process is traditionally structured into sequential stages, each focusing on specific aspects according to its time dis...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11080046/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850071034638630912 |
|---|---|
| author | Tiago Norbiato Dos Santos Andre Luis Marques Marcato Amanda Pavila Silva |
| author_facet | Tiago Norbiato Dos Santos Andre Luis Marques Marcato Amanda Pavila Silva |
| author_sort | Tiago Norbiato Dos Santos |
| collection | DOAJ |
| description | The operation planning of hydrothermal systems is characterized by high complexity due to the inherent temporal and spatial coupling of the problem. To address this complexity, the process is traditionally structured into sequential stages, each focusing on specific aspects according to its time discretization and study horizon. In the context of the Brazilian power system, these stages are referred to as long-, mid-, and short-term planning, with interdependencies formalized through a cost-to-go function. Reservoir storage is one of the main state variables in this function, linking different temporal stages. In long- and mid-term planning, hydropower plants with small reservoirs — typically designed for daily or weekly regulation — are usually modeled as run-of-river units and not considered as state variables, as they do not significantly contribute to interstage coupling. However, in short-term planning, such plants must be explicitly modeled with their corresponding reservoirs to properly account for their ability to respond to load fluctuations. This discrepancy can create challenges when coupling mid- and short-term models, as the cost-to-go function lacks forward-looking information on small reservoirs not represented in the mid-term model. This paper proposes an approach for representing small reservoirs in short-term hydrothermal operation planning. The objective is to capture short-term storage variations while imposing a condition that the final storage level matches the initial level — a necessary criterion for the plant to be treated as run-of-river in the mid-term model. The proposed approach is applied, as a case study, to the Brazilian power system. |
| format | Article |
| id | doaj-art-d2f7c36aca0945a2914ef4e30e4e1c7e |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-d2f7c36aca0945a2914ef4e30e4e1c7e2025-08-20T02:47:24ZengIEEEIEEE Access2169-35362025-01-011312917212918410.1109/ACCESS.2025.358917811080046Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation PlanningTiago Norbiato Dos Santos0https://orcid.org/0009-0002-2849-7277Andre Luis Marques Marcato1https://orcid.org/0000-0001-9171-3089Amanda Pavila Silva2https://orcid.org/0009-0006-3133-0223Brazilian National System Operator and Electrical Engineering Department, Federal University of Juiz de Fora, Juiz de Fora, BrazilElectrical Engineering Department, Federal University of Juiz de Fora, Juiz de Fora, BrazilBrazilian National System Operator and Electrical Engineering Department, Federal University of Juiz de Fora, Juiz de Fora, BrazilThe operation planning of hydrothermal systems is characterized by high complexity due to the inherent temporal and spatial coupling of the problem. To address this complexity, the process is traditionally structured into sequential stages, each focusing on specific aspects according to its time discretization and study horizon. In the context of the Brazilian power system, these stages are referred to as long-, mid-, and short-term planning, with interdependencies formalized through a cost-to-go function. Reservoir storage is one of the main state variables in this function, linking different temporal stages. In long- and mid-term planning, hydropower plants with small reservoirs — typically designed for daily or weekly regulation — are usually modeled as run-of-river units and not considered as state variables, as they do not significantly contribute to interstage coupling. However, in short-term planning, such plants must be explicitly modeled with their corresponding reservoirs to properly account for their ability to respond to load fluctuations. This discrepancy can create challenges when coupling mid- and short-term models, as the cost-to-go function lacks forward-looking information on small reservoirs not represented in the mid-term model. This paper proposes an approach for representing small reservoirs in short-term hydrothermal operation planning. The objective is to capture short-term storage variations while imposing a condition that the final storage level matches the initial level — a necessary criterion for the plant to be treated as run-of-river in the mid-term model. The proposed approach is applied, as a case study, to the Brazilian power system.https://ieeexplore.ieee.org/document/11080046/Hydropower plant reservoirhydrothermal system operationshort-term operation planning |
| spellingShingle | Tiago Norbiato Dos Santos Andre Luis Marques Marcato Amanda Pavila Silva Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning IEEE Access Hydropower plant reservoir hydrothermal system operation short-term operation planning |
| title | Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning |
| title_full | Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning |
| title_fullStr | Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning |
| title_full_unstemmed | Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning |
| title_short | Approach to Represent Run-of-River Hydropower Plants in the Short-Term Hydrothermal System Operation Planning |
| title_sort | approach to represent run of river hydropower plants in the short term hydrothermal system operation planning |
| topic | Hydropower plant reservoir hydrothermal system operation short-term operation planning |
| url | https://ieeexplore.ieee.org/document/11080046/ |
| work_keys_str_mv | AT tiagonorbiatodossantos approachtorepresentrunofriverhydropowerplantsintheshorttermhydrothermalsystemoperationplanning AT andreluismarquesmarcato approachtorepresentrunofriverhydropowerplantsintheshorttermhydrothermalsystemoperationplanning AT amandapavilasilva approachtorepresentrunofriverhydropowerplantsintheshorttermhydrothermalsystemoperationplanning |