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Analysis of institutional authors

Pérez-Díaz JiAuthorMartinez-Lucas G.Author or co-author of article in journal with external admissions assessment committee

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November 20, 2023
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Influence of water hammer effect on low frequency oscillation of grid-connected hydropower station system

Publicated to: RENEWABLE ENERGY. 219 119530- - 2023-12-01 219(), DOI: 10.1016/j.renene.2023.119530

Authors:

Liu, Z; Yu, XD; Pérez-Díaz, JI; Liu, Y; Martínez-Lucas, G
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Affiliations

Hohai Univ, Coll Water Conservancy & Hydropower Engn, Nanjing 210098, Jiangsu, Peoples R China - Author
Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul Eng, Nanjing 210098, Peoples R China - Author
Hohai University - Author
Tech Univ Madrid UPM, Dept Hydraul & Energy Engn, C Prof Aranguren S-N, Madrid 28040, Spain - Author
Universidad Politécnica de Madrid - Author
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Abstract

This paper aims to investigate the influence of the water hammer effect on low-frequency oscillations (LFO) in power systems, mainly quantifying and revealing the characteristics of hydraulic damping of LFO. The models of the grid-connected hydropower stations considering the water column elasticity (elastic model) and without considering it (rigid model) are respectively established and used as time domain validation models. The corresponding analytical formulas for the mechanical damping torque coefficients (MDTC) are derived to obtain the system's damping frequency characteristics. Finally, a method for quantifying the nonlinear system's damping is proposed. The results show that due to the effect of the water hammer wave, the system's damping frequency characteristics have changed, and damping peaks and valleys appear. The corresponding frequencies are determined by the frequency of the water hammer wave. The system has a critical oscillation frequency. When the frequency of LFO is below the critical frequency, water column elasticity must be considered. When the frequency of LFO is consistent with the frequency of the water hammer wave, the negative damping reaches its maximum. Finally, the proposed quantitative method was used to clarify the influence of the water hammer effect on the system's damping characteristics while considering nonlinear head loss.
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Keywords

analytical formulacontroller-designdamping quantificationdamping torque methodgovernorloadmechanismnon-linear systemsplantpower-systemsstability analysiswater hammerAnalytical formulaDamping quantificationDamping torque methodLow frequency oscillationNon-linear systemsTurbine regulating systemWater hammer

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal RENEWABLE ENERGY due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2023, it was in position 24/171, thus managing to position itself as a Q1 (Primer Cuartil), in the category Energy & Fuels.

From a relative perspective, and based on the normalized impact indicator calculated from World Citations provided by WoS (ESI, Clarivate), it yields a value for the citation normalization relative to the expected citation rate of: 1.07. This indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: ESI Nov 13, 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2026-04-07, the following number of citations:

  • WoS: 10
  • Scopus: 10
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Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2026-04-07:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 4 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: https://oa.upm.es/90370/

As a result of the publication of the work in the institutional repository, statistical usage data has been obtained that reflects its impact. In terms of dissemination, we can state that, as of

  • Views: 101
  • Downloads: 1
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Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: China.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: Last Author (MARTINEZ DE LUCAS, GUILLERMO).

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