Synchronous Generators

1165 WordsFeb 17, 20135 Pages
Table of Contents INTRODUCTION 3 MATLAB SIMULATION 4 DISCUSSION 8 REFERENCE 10 INTRODUCTION Synchronous generators or alternators are synchronous machines used to convert mechanical power to ac electric power. Nowadays, an isolated synchronous generator supplying its own load independently of other generators is very rare. Such a situation is found in only a few out-of-the-way applications such as emergency generators. For all usual generator applications, there is more than one generator operating in parallel to supply the power demanded by the loads. There are several major advantages to synchronous generators that operated in parallel. * Several generators can supply a bigger load than one machine by itself *…show more content…
This is to ensure the phase angles of oncoming generator changing slowly due to the running system‘s phase angles. There are a lot of advantages of operating synchronous generators in parallel. One of them is the other generators can supply bigger loads than the one machine. Secondly, paralleling synchronous generators can make these machines operate at high efficiency. One generator technically not operating at full load thus, it is not efficient. Besides, by paralleling many generators can increase the reliability of the system. In real situation, if one generator is breaking down, it will not affect the whole system greatly because of the power loss to the load. Lastly, if one generator is breaking down, it can be removed for maintenance without affect the system. CONCLUSION During paralleling two synchronous generators, some conditions are needed to be fulfilled. Each of the three phases must have exactly the same voltage magnitude and phase angle as the conductor to which it is connected. To achieve this match, the following conditions must be met. * The rms voltages of the two generators must be equal. * The two generators must have the same phase sequence. * The phase angles of the two a phase must be equal. * The frequency of the new generator, called the oncoming generator,
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