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

A generator set and control method technology, which is applied in the direction of controlling generators, controlling generators through magnetic field changes, control systems, etc. Guarantee the effect of parallel operation

Pending Publication Date: 2019-06-21
福建广通机电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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-e

Method used

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

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Embodiment 1

[0043] Please refer to Figure 1-6 , Embodiment 1 of the present invention is:

[0044] A method for controlling parallel operation of small single-phase generator sets provided by the present invention includes the following steps:

[0045]Simultaneously obtain the single-phase current input and single-phase voltage input of each small single-phase generator set in the parallel state, analyze and obtain the corresponding active power data, reactive power data and frequency data; wherein the small single-phase generator set The distortion rate of the output waveform of the unit is less than 10%. The output power of the small single-phase generator set is less than 10KW. Waveform distortion rate (THD) can reflect the degree of distortion of a signal waveform relative to a sine waveform. A small single-phase generator set with an output waveform distortion rate of less than 10% is used, which has the characteristics of low distortion and is conducive to precise control. Excit...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02P9/04H02P9/14
Inventor 刘芳彪
Owner 福建广通机电科技有限公司
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