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A three-phase AC voltage regulation digital control device and control method

A three-phase AC and control device technology, applied in the field of power voltage regulation, can solve the problems of inconvenient debugging and low control accuracy of three-phase AC voltage regulation control, achieve zero-crossing precision, realize digital control, and trigger stable effects

Active Publication Date: 2018-02-02
南京开通自动化技术有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a three-phase AC voltage regulation digital control device, and solve the technical problems in the prior art that the analog circuit is used for three-phase AC voltage regulation control, the control accuracy is not high, and the debugging is inconvenient

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  • A three-phase AC voltage regulation digital control device and control method
  • A three-phase AC voltage regulation digital control device and control method
  • A three-phase AC voltage regulation digital control device and control method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0042] Such as figure 1 Shown is the circuit principle block diagram of the three-phase AC voltage regulation digital control device provided by the present invention, including a host computer, a three-phase transformer, a three-phase rectification circuit, a zero-crossing detection module, a pulse trigger module and a data acquisition module. The zero-crossing detection module, the pulse trigger module and the data acquisition module are powered by a DC power supply module connected to a three-phase AC power supply.

[0043] The primary side of the three-phase transformer is connected to the three-phase AC power supply, the secondary side is electrically connected to the zero-crossing detecti...

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Abstract

The invention discloses a digital control device for three-phase AC voltage regulation. The primary side of a three-phase transformer is connected to a three-phase AC power supply, and the secondary side is electrically connected to a zero-crossing detection module and a three-phase rectifier circuit; the zero-crossing detection module, data acquisition The output ends of the modules are respectively connected to the host computer, and the host computer controls the three-phase rectification circuit through the pulse trigger module; the invention also discloses a digital control method for three-phase AC voltage regulation: the data acquisition module collects the measured voltage signal and the measured current of the load signal, the upper computer calculates the deviation between the measured voltage signal and the given voltage signal, and obtains the current control amount through voltage loop adjustment control; calculates the deviation between the current control amount and the measured current signal, and obtains the voltage control amount through current adjustment control, and the upper computer refers to The zero-crossing pulse signal output by the zero detection module enables the pulse trigger module to output a pulse signal to control the three-phase rectification circuit to realize three-phase AC voltage regulation. The invention has the characteristics of precise zero-crossing detection, stable triggering and the like.

Description

technical field [0001] The invention relates to a digital control device for three-phase AC voltage regulation, and also relates to a digital control method for three-phase AC voltage regulation, which belongs to the technical field of electric voltage regulation. Background technique [0002] Three-phase AC voltage regulation is an essential part of power electronics technology, but most of the three-phase AC voltage regulation devices today are controlled by analog circuits, the control method is old, the control accuracy is not high, and debugging is troublesome. Therefore, for the above aspects, the prior art needs to be improved and innovated. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a three-phase AC voltage regulation digital control device, and solve the technical problems in the prior art that the analog circuit is used for three-phase AC voltage regulation control, the control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/12G01R19/175
Inventor 黄家才张玎橙
Owner 南京开通自动化技术有限公司
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