Resumo:
In the case of parallel operation of a synchronous generator with an asynchronous induction
generator, the synchronous generator can be motorized, when the active power supplied by
the induction generator is greater than the power absorbed by the load fed by the two
generators in parallel. In this case, there is an alternative in order to avoid this occurrence,
which is the decrease of the speed of the asynchronous generator, for the purpose of
decreasing its active power supplying. This dissertation describes a proposal of a discrete
speed control system for the induction machine that contemplates this solution. A data
acquisition electronic board and a microcomputer are used to enable the implementation of
the referred proposed speed control system, in which harmonics are not generated, because
there are no static converters using semiconductors connected at the terminals of the
machines, a favorable aspect related to the quality of the electrical energy.
