Parallel control method of small-size single-phase power generator set

Abstract

The invention relates to the technical field of parallel connection of a power generator set, in particular to a parallel control method of a small-size single-phase power generator set. The parallelcontrol method comprises the following steps of acquiring a single-phase current input and a single-phase voltage input of each small-size single-phase power generator set in a parallel state, and analyzing to obtain corresponding active power data, reactive power data and frequency data; adjusting an excitation current value of the corresponding small-size single-phase power generator set according to the reactive power data; adjusting a corresponding engine output power according to the active power data and the frequency data; and judging whether an inverse power protection mechanism of thesmall-size single-phase power generator set is triggered or not according to the active power data. By analyzing the active power data and the reactive power data, the excitation current value of thesmall-size single-phase power generator set is adjusted and is used as a judgment criterion of triggering the protection mechanism of the small-size single-phase power generator set, so that the parallel running of the small-size single-phase power generator set is ensured, and the effective utilization ratio of the power generator is improved to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of generator set paralleling, in particular to a control method for small single-phase generator paralleling. Background technique [0002] When the generator supplies power to the load, the power of the load may be much greater than the power of a single generator, resulting in insufficient power of the generator to drive the load. In this case, the usual solution is to combine multiple generators to supply power to the load, which is called "parallel generator". In the prior art, the conditions for parallel operation of generators are relatively strict. During the parallel operation of alternators, only when the output voltage and frequency of each unit are basically equal and the phases are similar can they be closed and paralleled. It is necessary to maintain reactive power balance and active power balance in order to continue to operate. When the reactive power is unbalanced, one excitation will be ov...

AI Technical Summary

Problems solved by technology

One under-excited unit has reverse reactive power, and the other unit not only needs to carry the reactive power in the total load, but also has additional reverse reactive power of the under-excited unit, so the reactive current of the two units They are all very large, and when the active power is not large, the current of the unit is overloaded, that is, it cannot carry much load

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