Optimal successive start-up strategy of two hydraulic coupling pumped storage units based on multi-objective control. (October 2019)

• Record Type: Journal Article
• Authors: Hou, Jinjiao; Li, Chaoshun; Guo, Wencheng; Fu, Wenlong
• Is Part Of: International journal of electrical power & energy systems. Volume 111(2019)
• Page Start: 398
• Page End: 410
• Publication Date: 2019-10
• Subjects: Pumped storage power station -- Hydraulic coupling units -- Successive start-up -- Multi-objective optimization; Electrical engineering -- Periodicals; Electric power systems -- Periodicals; Électrotechnique -- Périodiques; Réseaux électriques (Énergie) -- Périodiques; Electric power systems; Electrical engineering; Periodicals; 621.3
• DOI: 10.1016/j.ijepes.2019.04.033
• Languages: English
• ISSNs: 0142-0615

Abstract

Highlights: A successive start-up model of a real-world PSPS is established and tested. The analysis of the impact of successive time interval △T is carried out. A novel multi-objective optimization scheme for successive start-up is proposed. Abstract: This paper aims to study the optimal successive start-up strategy of two hydraulic coupling pumped storage units (PSUs) based on multi-objective control. Firstly, a successive start-up model of a pumped storage power station (PSPS) with two PSUs is established. Secondly, the analysis of the impact of successive time interval ΔT is carried out. Thirdly, a novel optimization scheme multi-objective with two PSUs owning different parameters (MODP) is proposed for start-up optimization. For comparison, three optimization schemes named single objective with two PSUs sharing the same parameters (SOSP), single objective with two PSUs owning different parameters (SODP) and multi-objective with two PSUs sharing the same parameters (MOSP) are also tested. Finally, according to the four optimization schemes, i.e. SOSP, SODP, MOSP and MODP, the optimization model is established and performed separately in MATLAB 9.1 based on a real case. The results indicate that the change of ΔT has a great effect on the transient process of 1# PSU, but less effect on the transient process of 2# PSU. ΔT should be chosen as a decision variable in the successive start-up optimization. For the successive start-up of a PSPS with two PSUs, the multi-objective scheme is superior to the single-objective scheme. The scheme of different parameters is superior to the scheme of sharing parameters. Among four schemes, MODP scheme is the best. The MODP scheme can obtain the Pareto Set that provides more choices for decision makers, which is flexible in engineering applications. MODP is a general method for successive start-up strategy optimization.