IVL Swedish Environmental Research Institute

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  • 1.
    Fridén, Håkan
    et al.
    IVL Swedish Environmental Research Institute.
    Jacobson, Anton
    Nilsson Energy före detta IVL Svenska Miljöinstitutet.
    Björk, Anders
    IVL Swedish Environmental Research Institute.
    Uni- och multiderivata metoder för upptäckt av avvikelser i dammar2024Report (Other academic)
    Abstract [en]

    Dam monitoring is a large and important area for Swedish dam owners. It is a challenge to continuously monitor a dam construction with its sensors and be able to quickly react to changes that indicate a deviation in the dam. The report covers methods for computer-based detection of sensor and communication errors and the application of multivariate methods to detect and visualize anomalous states for a dam.The report is an account of the third of a series of research projects. The project has been run by IVL Swedish Environmental Research Institute AB during 2022–2023. All projects have been funded by Energiforsk and the SIVL foundation and with the aim to implement monitoring, detection, and visualization of sensor errors as well as overall condition monitoring of dams including warnings when the condition is moving towards a non-normal area.

    One purposes of this project has been to deepen the knowledge of the methods through an additional case study which has a different character both regarding the dam and its monitoring sensors. A second purpose has been to increase knowledge and competence both in breadth and depth for the involved industry. A third purpose has been to find ways to improve the accessibility of the results that our methods provide.In the previous two projects in the series, it was reported how we developed and installed a general monitoring application that runs in real time at two of the dam owners with data transfer from and to their signal databases. We have developed methods for independent monitoring of individual signals, univariate monitoring and started the development of multivariate monitoring.In this project, the accumulated experience has been used to connect a third dam, Case Study III, and to continue the development of the methodology. A large part of the project has also been devoted to dissemination of results in the form of webinars, a deeper course for staff at the power companies on the methodology used and the underlying theory.The project series now has three case studies and through the plant owners the project has gained access to more than 5 years of historical data for each dam. These data form the basis for further development and evaluation of monitoring methods. Collecting, building a common understanding of and pre-processing this data requires a lot of time and good cooperation between data specialists and dam owners, a foundation that has now been laid.

    This report is published both in Energiforsk's report series and in IVL's report series B.

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