Electromechanical System Failure Analysis in Hydropower Plant
| dc.contributor.advisor | Edessa, Dribssa (PhD) | |
| dc.contributor.author | Solomon, Worku | |
| dc.date.accessioned | 2018-07-31T12:14:23Z | |
| dc.date.accessioned | 2023-11-18T06:32:14Z | |
| dc.date.available | 2018-07-31T12:14:23Z | |
| dc.date.available | 2023-11-18T06:32:14Z | |
| dc.date.issued | 2017-02 | |
| dc.description.abstract | In this thesis, assess electromechanical components of hydropower plant condition by using fault tree analysis. Show the failure occurrences of Gilgel gibe II hydropower plant generation units. Also developed and constructed the model of fault tree of electromechanical components of hydropower plant system based on Gilgel Gibe II hydropower plant in Ethiopia. The causes are deductively identified as the event causing every possible hazard by constructing a fault tree. The fault tree is constructed in a hierarchical structure with a single top event. The qualitative results help in focusing attention on main apparatus of electromechanical components that contributed to the unreliability of the system. Through qualitative fault tree analysis of electromechanical components Disabled turbine sub-system contain 26 single-basic-event minimal cut sets with occurrence probabilities 0.026; this indicates that disabled turbine sub-system is the highest ranking in qualitative structure importance which means the disabled turbine sub-system is the weakness point in the electromechanical system. The Turbine generator unit failure sub-system contain 14 single basic events and 12 two basic events of minimal cut sets with occurrence probabilities 0.014012, this indicates that The Turbine generator unit failure subsystem is the strongest point of electromechanical system. Quantitative analysis is performed to estimate the probability of the top event occurrence and sub top event occurrences or unreliability of the electromechanical components hydropower plant system. The quantitative fault tree analysis resulted the rankings of quantitative contribution of sub-systems to the occurrence of top event are obtained as Disabled Turbine with occurrences of 0.0256776, Malfunction Generator with occurrences of 0.0158806 and Turbine-Generator unit failure with occurrences of 0.0139212 respectively. This means that utmost care should be taken to prevent the occurrence of the most contribute sub-system of electromechanical system failure. Turbine Failure is the most contribute sub-system of electromechanical system failure, so it takes care to prevent the electromechanical system. And finally propose maintenance policy for the common component or system failure (cooling and lubrication system) under root causes. Keywords: Fault tree analysis, electromechanical components of hydro power plant (Turbine, Generator and Governor and Control system) | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/10701 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Fault tree analysis; electromechanical components of hydro power plant (Turbine; Generator and Governor and Control system) | en_US |
| dc.title | Electromechanical System Failure Analysis in Hydropower Plant | en_US |
| dc.type | Thesis | en_US |