Short-Term Optimal Operation of Cascade Reservoirs Considering Dynamic Water Flow Hysteresis
Autor: | Yuan Liu, Qiumei Ma, Yanke Zhang, Yueqiu Wu, Changming Ji |
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Rok vydání: | 2019 |
Předmět: |
ipoa
lcsh:Hydraulic engineering Water flow Geography Planning and Development 0207 environmental engineering 02 engineering and technology Inflow 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry lcsh:Water supply for domestic and industrial purposes water flow hysteresis lcsh:TC1-978 Control theory 020701 environmental engineering 0105 earth and related environmental sciences Water Science and Technology lcsh:TD201-500 Attenuation Term (time) Hysteresis (economics) Cascade space mapping principle Environmental science Constant (mathematics) short-term optimal operation Energy (signal processing) |
Zdroj: | Water, Vol 11, Iss 10, p 2098 (2019) Water Volume 11 Issue 10 |
ISSN: | 2073-4441 |
DOI: | 10.3390/w11102098 |
Popis: | In making short-term optimal operation schemes of cascade reservoirs, water flow hysteresis between the upper reservoir and the lower reservoir is often considered as constant, which cannot really reflect the hysteresis variation between different water flows and will lead to losses of the optimal operation scheme&rsquo s benefit. To depict the water flow hysteresis, a Dynamic Water Flow Hysteresis Method (DWFHM) is proposed, based on the space mapping principle. With the mapping operator in the DWFHM, the lower reservoir inflow can be directly obtained. Besides, the DWFHM is used to deal with the hydraulic relation constraint in the short-term optimal operation model of cascade reservoirs. Then, the improved model is applied to the Jinguan cascade reservoirs in the Yalong River basin and solved by an Improved Progressive Optimal Algorithm (IPOA). The results are as follows. (1) Compared with the traditional Fixed Water Flow Hysteresis Method (FWFHM), the inflow processes of the lower reservoir obtained by the DWFHM are more in line with the actual values, due to full consideration of the attenuation effect. (2) The optimal operation with the DWFHM can effectively increase the generated energy (2827 MW· h and 504 MW· h in the non-flood season and the flood season, respectively). Through the analysis of this case, the DWFHM developed in this study can effectively improve the practicability of the optimal operation scheme and reduce the risk in the operation of cascade reservoirs. |
Databáze: | OpenAIRE |
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