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Synchronous sampling method of on-line monitoring integrated device for power quality and user environment

A user environment and synchronous sampling technology, applied in measuring devices, frequency measuring devices, measuring electrical variables, etc., can solve the problems of complicated synchronous sampling operations, high cost, complex hardware structure of high-performance hardware systems, etc., and achieve real-time effective automatic tracking Sampling, good accuracy results

Pending Publication Date: 2017-10-03
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the hardware structure of the high-performance hardware system is complex, resulting in complicated and costly synchronous sampling operations

Method used

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  • Synchronous sampling method of on-line monitoring integrated device for power quality and user environment
  • Synchronous sampling method of on-line monitoring integrated device for power quality and user environment

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Embodiment Construction

[0015] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0016] Such as figure 1 As shown, the synchronous sampling method of the integrated device for online monitoring of power quality and user environment adopts zero-crossing detection logic circuit, phase-locked frequency multiplication logic circuit, anti-out-of-step logic circuit and anti-out-of-step logic control strategy; the zero-crossing detection logic circuit The output end is the input end of the phase-locked frequency multiplication logic circuit, the output end of the phase-locked frequency multiplication logic circuit is the input end of the anti-out-of-step logic circuit, and the anti-out-of-step logic control strategy is used to control the anti-out-of-step logic circuit;

[0017] The zero-crossing detection logic circuit is used to change the sinusoidal signal into a square wave signal...

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Abstract

The invention relates to the technical field of the synchronous sampling, more particularly to a synchronous sampling method of an on-line monitoring integrated device for the power quality and user environment. A zero-crossing detection logic circuit, a phase-locked frequency-multiplication logic circuit, an anti-out-of-step logic circuit and an anti-out-of-step logic control strategy are employed. The output terminal of the zero-crossing detection logic circuit serves as the input terminal of the phase-locked frequency-multiplication logic circuit; the output terminal of the phase-locked frequency-multiplication logic circuit serves as the input terminal of the anti-out-of-step logic circuit; and the anti-out-of-step logic control strategy is used for controlling the anti-out-of-step logic circuit. Therefore, a certain multiple relationship between a synchronous sampling frequency and a monitored grid signal is kept and automatic tracking and sampling of grid frequency fluctuation are realized in real time. The method has the high accuracy.

Description

technical field [0001] The invention relates to the technical field of synchronous sampling, in particular to a synchronous sampling method of an integrated device for online monitoring of power quality and user environment. Background technique [0002] Signal synchronous sampling is widely used in power systems, such as power harmonic measurement, system impedance measurement, etc. High-performance signal synchronous sampling is generally realized through hardware systems. However, the hardware structure of the high-performance hardware system is complex, resulting in complicated and costly synchronous sampling operations. Moreover, failures such as sampling interruption and sampling out-of-synchronization often occur in synchronous sampling. Therefore, the present invention uses a method of combining hardware logic circuits and software air strategies to provide a synchronous sampling method for an integrated device for online monitoring of power quality and user environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02G01R19/175
CPCG01R19/175G01R23/02
Inventor 郭敏金庆忍陈卫东楚红波严旭高立克杨艺云
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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