Comparison of Procedures to Combine Operating Zones of Multiple Units into Plant-Based Operating Zones

Yang Wu, Wang Xia, Jinwen Wang, Shuangquan Liu, Binbin Zhou, Zhenyu Zhao and Cheng Chen ()
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Yang Wu: Yunnan Power Grid Co., Ltd., 73# Tuodong Road, Kunming 650011, China
Wang Xia: School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
Jinwen Wang: Institute of Water Resources and Hydropower, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
Shuangquan Liu: Yunnan Power Grid Co., Ltd., 73# Tuodong Road, Kunming 650011, China
Binbin Zhou: Yunnan Power Grid Co., Ltd., 73# Tuodong Road, Kunming 650011, China
Zhenyu Zhao: Yunnan Power Grid Co., Ltd., 73# Tuodong Road, Kunming 650011, China
Cheng Chen: School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China

Energies, 2023, vol. 16, issue 3, 1-13

Abstract: The hydropower unit commitment (HUC) is often indirectly considered by combining individual units in a hydropower plant into a plant-based generator to alleviate the dimensional difficulty in short-term hydropower scheduling of cascaded reservoirs. This work presents three procedures to combine operating zones of units in a hydropower plant into the plant-based operating zones, including an exhaustive method (M01) that enumerates all the possible combinations, a discrete method (M03) that investigates discrete values to see if they are in an operating zone, and a bound oriented method (M04) that explores new operating zones with an optimization solver. The procedures are compared with a previous one (M02) that merges the operating zones of a unit one by one in order. The experiments of the methods in 11 case studies involving a variety of hydropower plants reveal that the second method (M02) should always be recommended due to its strength, which is even more prominent than any other methods in dealing with large-scale problems, and errors occur when using interpolation to estimate the plant-based operating zones at a water head between two sampling water heads.

Keywords: HUC; MILP; unit-based operating zone; plant-based operating zone (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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