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dc.rights.licenseCC-BY-NC-ND
dc.contributor.advisorNieuwlaar, Evert
dc.contributor.authorEs, J. van
dc.date.accessioned2018-02-20T18:01:21Z
dc.date.available2018-02-20T18:01:21Z
dc.date.issued2016
dc.identifier.urihttps://studenttheses.uu.nl/handle/20.500.12932/28643
dc.description.abstractGreen Gas is an energy carrier that is increasingly produced in the Netherlands. It is used to replace part of the natural gas in the Dutch gas grid as a piece of the energy transition puzzle. The Green Gas is fed into local gas grids, which forms a challenge for distribution system operators (DSOs). In order to test how a DSO should act when multiple Green Gas producers are active in one gas grid, Stedin has developed a constant flow control for natural gas to simulate a local Green Gas feeder. Kiwa Technology is setting up a demonstration in which the realised feed-in capacity of Green Gas will be allocated over the constant flow controller and one existing Green Gas producer. Earlier tests have shown the potential of realising more capacity for Green Gas in local gas grids during summer. However, it had also become clear that the current flow control was not stable when sudden pressure variations occurred. Therefore, in this research, a new control algorithm for the constant flow rate controller has been designed, which assures that the flow of gas remains equal to the chosen set point under all circumstances. This algorithm calculates the flow through the system by applying the geometry of the ball valve in the system. The algorithm recognises the set point, the pressure in the grid, the pressure difference across the valve and the gas temperature as input variables. In order to keep the flow through the valve close to the set point, the valve position is continuously adjusted based on the input signals. The new control concept has been tested in both a model and in a field test, where it is able to sustain a constant flow within 10% of the set point. Furthermore, it shows to provide better results in responding quickly to changing circumstances and, unlike the old control, does so without skipping the set point.
dc.description.sponsorshipUtrecht University
dc.format.extent1824063
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.titleSimulating local Green Gas feed-in through constant gas flow control
dc.type.contentMaster Thesis
dc.rights.accessrightsOpen Access
dc.subject.keywordsGreen Gas; energy transition; gas flow; constant flow; flow control; SG3; feed-in capacity; DSO
dc.subject.courseuuEnergy Science


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