Abstract
The main problem addressed in this thesis is how to operate an multimachine islanded system as a synchronous island, without the risk of motor-mode operation.Synchronous island operation is when the islanded area is operated in such a way that it is always ready to be reconnected to the main grid. This requires full control of frequency, phase angle and voltage magnitude.
In this thesis the development of an multi-machine synchronous island control scheme is presented. The thesis presents a method to obtain numerical control of a generator using a low cost computer. Once numerical control was achieved the control algorithm was developed through three iteration of single machine synchronous islanding. Each iteration was tested within a physical laboratory. The multi-machine synchronous island control scheme features a novel load-sharing scheme which successfully protects the participating generators from motor mode operation.
The thesis successfully demonstrates a multi-machine synchronous islanding, with a novel load-sharing scheme, within an physical laboratory. The findings in this thesis could change the view on islanding from an unwanted state of operation to an preventive measure used when faced with large disturbances, or it could also be used as a non-disruptive alternative to anti-islanding schemes. The thesis features a more elegant way to operate an islanded system.
| Date of Award | Jul 2019 |
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| Original language | English |
| Awarding Institution |
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| Supervisor | David Laverty (Supervisor) & Robert Best (Supervisor) |
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