Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/261E3F7E-F8B1-4450-A9EF-82CD358E7DB8 | ||
| Year | 2020 | ||
| Type of Item | Diploma Work | ||
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| Bibliographic Citation | Eleni Koutsaki, "System reliability and fault tree analysis of a steam electric power station. Case study: steam power system in Xylokamara, Chania, Greece", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2020 https://doi.org/10.26233/heallink.tuc.84802 | ||
| Appears in Collections |
The Greek island of Crete contains an independent electrical network. The already high demand of power and energy is continuously growing for the island. This has led to the decision of interconnecting Crete with Greece's mainland. This will result to almost the total energy demand of the island coming through the interline cable and power plants in Crete will be out of order. In case of emergency though, some energy production units of Crete have to be on standby. One of those stand by production units is the ABB GT8 45MW gas turbine of the combined cycle of Xylokamara power plant in Chania city, which is the case study of this thesis. The specific unit is chosen for the study because is a quite big and fast loading machine with perfect correspondence to frequency variations but with one disadvantage. The directive 2010/75/EU on industrial emissions does not allow this gas turbine to exceed the 70% of its nominal load. To deviate this restriction some expensive investments should be done and the final decision for that is depended on the reliability of this unit.In the present Thesis is analyzed whether this specific ABB gas turbine will be able to be efficient and reliable in case of the emergency.Our analysis includes i) Fault Tree Analysis in order to allow us to construct and analyze fault tree diagrams, ii) Event Tree Analysis in order to allow us to analyze the possible outcomes of an event occurring and iii) Weibull Analysis in order to enable the construction of Weibull models for the component. Τhe program used for the fault tree analysis is the commercial Isograph reliability workbench, suitable for safety analyses according to ISO26262. The data used are obtained from real world sources: the company’s records and the official technical specifications for operation, maintenance and troubleshooting.
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