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Multi-objective control of transient process of hydropower plant with two turbines sharing one penstock under combined operating conditions

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  • Cui, Zilong
  • Guo, Wencheng

Abstract

This paper studies the multi-objective control of transient process of hydropower plant with two turbines sharing one penstock under combined operating conditions (COCs). Firstly, the model of transient process of hydropower plant is presented. The illustration of four COCs is provided. Then, the multi-objective control strategy of transient process under COCs is designed. The decision variables and objective functions are selected. The control scheme and decision method are determined. Finally, the most favourable superposition time and the most unfavourable superposition time under COCs are determined. The results indicate that the objective function contains three objectives, i.e. spiral case outlet pressures, draft tube inlet pressures and rotational speeds of turbines. The most favourable superposition time under COC-1 can realize that the objectives reach control requirements simultaneously. The most favourable superposition time under COC-2 and the most unfavourable superposition time under COC-1 and COC-2 cannot realize that the objectives reach control requirements simultaneously, but can balance the objectives to the maximum extent. It is unnecessary to distinguish the most favourable superposition time and the most unfavourable superposition time strictly under COC-3. There is no the concepts of the most favourable superposition time and the most unfavourable superposition time under COC-4.

Suggested Citation

  • Cui, Zilong & Guo, Wencheng, 2023. "Multi-objective control of transient process of hydropower plant with two turbines sharing one penstock under combined operating conditions," Renewable Energy, Elsevier, vol. 206(C), pages 1275-1288.
    • Handle: RePEc:eee:renene:v:206:y:2023:i:c:p:1275-1288
    DOI: 10.1016/j.renene.2023.02.134
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