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A method and device for determining the number of compensation points and a method for realizing repetitive control

A technique of repetitive control and points, which is applied in the direction of electric controllers, etc., can solve problems such as repetitive control compensation misalignment, compensation point drift, etc.

Active Publication Date: 2016-04-06
VERTIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a method and device for determining the number of compensation points and a method for realizing repeated control, so as to solve the problem in the prior art that the number of compensation points drifts, which leads to the dislocation of repeated control compensation

Method used

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  • A method and device for determining the number of compensation points and a method for realizing repetitive control
  • A method and device for determining the number of compensation points and a method for realizing repetitive control
  • A method and device for determining the number of compensation points and a method for realizing repetitive control

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Embodiment 1

[0026] Such as figure 1 As shown, it is a schematic flow chart of the method for determining the number of compensation points in Embodiment 1 of the present invention. The method for determining the number of compensation points can be applied to a UPS inverter repetitive control system. The method includes the following steps:

[0027] Step 101: According to the output waveform in the current period, determine the phase-locking step corresponding to the output waveform in the current period, wherein the phase-locking step corresponding to the output waveform in the current period refers to a complete interruption in the current period The phase deflection angle that the duration waveform passes through.

[0028] Specifically, since the interrupt duration corresponding to each interrupt in the system is fixed and determined by the interrupt frequency of the system (the interrupt frequency of the system can be 9KHZ, 18KHZ, and 24KHZ, etc., correspondingly, the interrupt durati...

Embodiment 2

[0049] Embodiment 2 of the present invention is a detailed description of the method for determining compensation points described in Embodiment 1 of the present invention, such as figure 2 As shown, it is a schematic flow chart of the method for determining compensation points described in Embodiment 2 of the present invention, and the method includes the following steps:

[0050] Step 201: According to the output waveform in the current period, determine the phase-locking step corresponding to the output waveform in the current period.

[0051] Specifically, the phase-locking step corresponding to the output waveform in the current period refers to the phase deflection angle that a complete interruption duration waveform passes through in the current period. Further, in this step 201, the phase-locking step size corresponding to the output waveform in the current cycle can be determined in the following manner:

[0052] According to the output waveform in the current cycle...

Embodiment 3

[0080] Such as Figure 5 As shown, it is a schematic structural diagram of the device for determining the number of compensation points described in Embodiment 3 of the present invention. The device for determining the number of compensation points can be applied to UPS inverter repetitive control systems, including a phase-locking step determination module 11 and compensation points Identify module 12, wherein:

[0081] The phase-locking step determination module 11 is used to determine the phase-locking step corresponding to the output waveform in the current cycle according to the output waveform in the current cycle, wherein the phase-locking step corresponding to the output waveform in the current cycle is Refers to the phase deflection angle of a complete interruption duration waveform in the current cycle; specifically, the phase-locking step determination module 11 is used to determine the cycle corresponding to the output waveform in the current cycle according to the...

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Abstract

The invention discloses a compensation point number determining method and device and a method realizing repetitive control, wherein the methods and the device are used in an uninterruptible power supply UPS inverter repetitive control system. The compensation point number determining method comprises the steps that according to an output waveform in the current period, a phase-lock step size corresponding to the output waveform in the current period is determined, and a compensation point number corresponding to the current period is determined according to the determined phase-lock step size; and the phase-lock step size corresponding to the output waveform in the current period is a phase deflection angle of a long waveform when a time of complete interruption is carried out in the current period. According to the technical scheme of the invention, the compensation point number corresponding to the current period is determined in real time according to the phase-lock step size corresponding to the output waveform in the current period; the problems of compensation point number drift and a repetitive control compensation error, which are caused by unsynchronized period zero crossing and compensation point number calculation in the prior art, are solved; and the compensation effect of UPS inverter repetitive control is improved.

Description

technical field [0001] The invention relates to the technical field of UPS (Uninterruptible Power System, uninterruptible power supply) repetitive control, in particular to a method and device for determining compensation points and a method for realizing repetitive control. Background technique [0002] When the UPS works in a steady state with load, the waveform error caused by the disturbance occurs repeatedly in each fundamental wave cycle. In order to improve the output waveform of the UPS and reduce the waveform error caused by the disturbance, the repetitive control technology is usually embedded in the closed-loop system. To compensate and correct the output waveform, specifically, by using repetitive control technology to accumulate the repeated waveform error every cycle, delaying the waveform output of the next cycle, and correcting the waveform error cycle by cycle, so that the control system It does not need multi-variable sampling, nor does it require high cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/32
Inventor 张龙云黄金金徐俊瑞资志翔
Owner VERTIV CORP