A single-cycle fixed-point sampler for power electronic devices

A technology of power electronic device and sampler, which is applied in the direction of measuring device, instrument, measuring electricity, etc., can solve the problem of inaccurate results, and achieve the effect of simple procedure, improved accuracy and high stability

Active Publication Date: 2019-07-23
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The result of such sampling will be inaccurate

Method used

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  • A single-cycle fixed-point sampler for power electronic devices
  • A single-cycle fixed-point sampler for power electronic devices
  • A single-cycle fixed-point sampler for power electronic devices

Examples

Experimental program
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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0043] like figure 1 As shown: in this embodiment, a power electronic device uses a single-period fixed-point number sampler to realize the main flow of the sampling method in sequence: collecting power electronic device signals, signal comparison and filtering, PI adjustment, error signal filtering, counter counting and fixing The number of sampling; the specific steps are as follows:

[0044] (1) Acquisition of signals from power electronic devices:

[0045] Set the program execution counter to count the system clock signal, every count to c+Δ e (t), just one sampling, where c is the fixed parameter of the system, Δ e (t) is the obtained error signal, where c+Δ e (t)=F clk *P / n.

[0046] (2) Signal comparison and filtering:

[0047] (3) PI adjustment:

[0048] like figure 2 As shown, using a proportional amplifier and an integral...

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Abstract

The invention relates to a single-cycle fixed-point-number sampler for a power electronic device. The sampler is composed of a sampling module, a multiplication comparison module, a first filter module, a PI adjustment module and a second filter module. The sampling module sends a collected current signal VAD (t) to the multiplication comparison module to carry out multiplication comparison with a system internal synchronization signal M (t); the first filter module carries out filtering processing to obtain an outputted voltage signal VS(t); PI adjustment is carried out on the outputted voltage signal by the PI adjustment module to obtain an error signal VPI (t); and then the second filter module carries out filtering processing to obtain delta e(t). The implementation process is simple and the stability is high; and a stable result can be obtained even if a sampled object has a harmonic wave.

Description

technical field [0001] The invention relates to a single-period fixed-point number sampler for a power electronic device, which belongs to the technical field of power electronics. Background technique [0002] With the rapid development of power electronics technology, sampling is used more and more, and it is becoming more and more important. The accuracy of sampling is a core link, which has a crucial impact on the data processing results. [0003] Most of the data sampling is to set a fixed sampling frequency, ignoring the frequency change of the sampling signal. The result of such sampling will be inaccurate. Contents of the invention [0004] The purpose of the present invention is to accurately sample a fixed number of points in a single cycle in the case of sampling signal fluctuations and harmonic interference, so that the processor can accurately process the sampled data. The present invention discloses a single Periodic fixed-point sampler. [0005] The techn...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G05B19/042G01R31/00
CPCG01R31/00G05B19/0425G05B2219/2612
Inventor舒展邓健周宁陈波程思萌赵勇
OwnerSTATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST