A comparative framework to impact assessment of objective function structure and supply/demand scenario on hydropower operation
| Autor: | Negar Gholami, Hesam Seyed Kaboli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Water Supply, Vol 22, Iss 1, Pp 883-899 (2022) |
| Druh dokumentu: | article |
| ISSN: | 1606-9749 1607-0798 |
| DOI: | 10.2166/ws.2021.226 |
| Popis: | The structure of objective functions in the reservoir optimization problem indicates the type of attitude to operation. This paper presents an analytical framework to improve the structure of the objective function by comparing six various forms of single-objective and bi-objective problems. Problems 1 and 2 were defined to compare two perspectives of operation, water supply versus energy generation. Problem 3 was also designed to examine the effect of the intra-annual electricity demand, which was ignored in problem 2. Comparison of problems 4 and 5 shows the simultaneous effect of realistic water and electricity demand scenarios on finding an optimal Pareto front. Problem 6 considers a supply policy in which maximum hydropower generation in peak months is the main strategy to reduce socioeconomic tensions. These problems were analyzed for a period of 72 months in the operation of the Dez reservoir in the southwest of Iran. The results of comparisons showed that the average annual water supply in problem 1 is 334 Mm3 higher than in problem 2, while the mean annual hydropower generation in problem 2 compared with problem 1 increases by 58.9 GWh. Hydropower generation in problem 2 compared with problem 3 experiences a 31.8% decrease in the peak period and a 111% increase in the non-peak months, which can impose significant problems on the National Electricity Network. The Pareto front for problem 5 is better than for problem 4 at all points, meaning that the demand coefficient improves the Pareto front. The solutions of problem 6 can result in efficient meeting of water and electricity demand in critical periods and greatly improve practical planning. HIGHLIGHTS We analyzed different single/bi-objective optimization problems to improve the structure of the objective function through a comparative study.; Considering demand scenarios improves performance parameters of the reservoir.; Implementation of a strategy of maximum hydropower generation in peak months leads to finding a set of optimal Pareto solutions that can provide practical planning.; |
| Databáze: | Directory of Open Access Journals |
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