THEORETICAL AND EXPERIMENTAL INVESTIGATIONS ON THE PERFORMANCE OF SYNCHRONOUS MACHINES UNDER THYRISTOR-BRIDGE LOAD OPERATION
| dc.contributor.advisor | El-Serafi, Ahmed M. | |
| dc.creator | Shehata, Somaya Afify M. | |
| dc.date.accessioned | 2024-08-14T20:49:20Z | |
| dc.date.available | 2024-08-14T20:49:20Z | |
| dc.date.issued | 1980-09 | |
| dc.date.submitted | September 1980 | |
| dc.description.abstract | In recent years, the level of harmonics in power systems has become relatively high. Meantime, there is a tendency to eliminate the filters which are usually provided to absorb these harmonics. This has triggered an interest for investigating the interaction between synchronous generators and thyristor-bridge loads and for studying the effect of the harmonics on the performance of synchronous machines. In this thesis, a rigorous and an easily manipulated analysis has been developed for the determination of the performance of synchronous generators supplying thyristor-bridge loads. This analysis accounts for the full interaction between the synchronous generator and the thyristor-bridge load. The developed analysis is capable of predicting the waveforms of the various variables of the synchronous generator, and their harmonic contents for two cases: (i) when the resistances are neglected, and (ii) when the resistances are taken into consideration. The algorithm of solution of this analysis avoids the use of an iteration process when the resistances are neglected. Special considerations have been given in this thesis to the design features of synchronous generators supplying thyristor-bridge loads. In this regard, a great deal of work was devoted to the investigation of the effect of the synchronous machine parameters and the system operating conditions on the harmonic levels of its various variables as well as on the copper losses in the machine windings. The findings of these studies would provide the guide lines for designing synchronous machines to cope with the thyristor-bridge loading. In order to examine the validity of the analysis, extensive experimental investigations were carried out on a microalternator supplying a thyristor -bridge load. In these investigations, the PDP LAB-8/E minicomputer has been used for acquiring, storing and processing the experimental results. The studies have been conducted for different operating conditions as well as for various external inductances and resistances inserted in the microalternator circuits. The comparison made between the experimental and analytical results has proved the general validity of the analysis. | |
| dc.identifier.uri | https://hdl.handle.net/10388/15905 | |
| dc.title | THEORETICAL AND EXPERIMENTAL INVESTIGATIONS ON THE PERFORMANCE OF SYNCHRONOUS MACHINES UNDER THYRISTOR-BRIDGE LOAD OPERATION | |
| dc.type.genre | Thesis | |
| thesis.degree.department | Electrical and Computer Engineering | |
| thesis.degree.discipline | Electrical Engineering | |
| thesis.degree.grantor | University of Saskatchewan | en_US |
| thesis.degree.level | Doctoral | |
| thesis.degree.name | Doctor of Philosophy (Ph.D.) |