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Dynamic regulation characteristics of pumped-storage plants with two generating units sharing common conduits and busbar for balancing variable renewable energy
Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China;Zhongnan Engn Corp Ltd, Power Construct Corp China, Changsha 410014, Hunan, Peoples R China.
Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity. Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China.ORCID iD: 0000-0003-1638-0792
China Southern Power Grid, EPRI, Guangzhou 510663, Guangdong, Peoples R China.
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2019 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 135, p. 1064-1077Article in journal (Refereed) Published
Abstract [en]

Pumped-storage plants (PSPs) are becoming increasingly important for balancing variable renewable energy (VRE) in power systems. A large portion of PSPs consist of multiple generating units (GUs) with shared water conduits and busbar. In this paper, an integrated transfer function (ITF) model for such PSPs in generation mode under primary frequency control (PFC) is proposed. Based on a real PSP in China, this ITF model is validated with both simulation results using the method of characteristics (MOC) as well as data from on-site measurements. For a series of governor parameter (K-p and K-i) settings under different governor control modes, stability limits expressed by gain and phase margins are evaluated and time domain simulations for balancing wind power variations are carried out to assess the quality of regulation. The results reveal that the dynamic regulation characteristics of the studied PSP system is clearly effected by the governor control mode. Besides, due to its complexity, a general range of the gain and phase margins is not viable for the studied PSP system under different governor control modes. Therefore, a thorough time domain sensitivity analysis using both step and realistic load disturbance as inputs is required for the studied PSPs for balancing VRE.

Place, publisher, year, edition, pages
2019. Vol. 135, p. 1064-1077
Keywords [en]
Pumped-storage plant, Dynamic regulation characteristics, Primary frequency control, Variable renewable energies, Mathematical model, Wind power
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:uu:diva-379016DOI: 10.1016/j.renene.2018.12.082ISI: 000459365600093OAI: oai:DiVA.org:uu-379016DiVA, id: diva2:1295697
Available from: 2019-03-12 Created: 2019-03-12 Last updated: 2019-03-12Bibliographically approved

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