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State-of-the-art development platform for hydropower turbine governors
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2017 (English)Independent thesis Advanced level (professional degree), 300 HE creditsStudent thesis
Abstract [en]

Hydropower is a flexible energy source that is essential for balancing the electrical power system on all timescales, from seconds to years. In addition to intra-hour regulation, it provides frequency containment reserves (FCR-N,FCR-D) and frequency restoration reserves (mFRR, aFRR) to the grid. The turbine governor is a device responsible for controlling the power output and delivering frequency control to the system. The aim of this Master’s Thesis project is to develop a new hydropower turbine governor in MATLAB/Simulink, which contains all critical functionality from the existing governor and with the same performance. The new governor should as far as possible comply to the well-established communication standard IEC 61850.

A working model of the turbine governor has been built in Simulink that supports normal operation with frequency control, start and stop, load rejection, operation mode as synchronous condenser and more. Validations of the model against data from Akkats powerplant shows that the model behaves as a real governor during normal operation. Validations of the start sequence showed deviations during sequence 3 and 4 which can be explained by usage of different PID parameters.

Using IEC 61850 as a nomenclature and as a way of structuring functions in the governor has also been possible. Implementing the whole standard for communication, requires that the control system also is renewed according to IEC 61850. Certain functions, as sequencing has thus not been done according to the standard.

MATLAB and Simulink provide tools for building, simulating and testing implementations of the turbine governor. The contributions this platform can provide are; ease of implementation, optimization and testing of control strategies. Simulink also provides a graphical interface, which reduce system complexity. An optimal implementation requires a hardware with support for Simulink to get a transparent platform.

Ultimately, these benefits could result in better frequency quality at a lower cost, which is essential for successful and cost-effective integration of other renewable energy sources such as wind- and solar power.

Place, publisher, year, edition, pages
2017. , p. 50
Keywords [en]
Development platform, Frequency control, Hardware-in-the-loop simulations, Hydropower, IEC 61850, MATLAB, PLC, Power station control, Simulink, Turbine governor
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:umu:diva-143909OAI: oai:DiVA.org:umu-143909DiVA, id: diva2:1173833
External cooperation
Vattenfall AB
Subject / course
Energiteknik
Educational program
Master of Science Programme in Energy Engineering
Supervisors
Examiners
Available from: 2018-01-15 Created: 2018-01-14 Last updated: 2018-01-15Bibliographically approved

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CiteExportLink to record
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Citation style
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