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Automatic time compensation correction method and synchronous sampling universal module

A technology of time compensation and correction method, applied in the field of power electronics, can solve the problems of synchronous acquisition, signal processing error, uneven manufacturer level, different terminal time error, etc., to achieve strong applicability, simple module structure, communication The effect of interface standardization

Active Publication Date: 2021-12-07
国网江苏省电力有限公司淮安供电分公司 +2
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Problems solved by technology

[0003] At present, most of the terminal devices used on the distribution network come from different manufacturers, which are relatively scattered and have certain technical fortresses, and the time errors on the terminals are all different, and the level of the manufacturers is uneven, because the synchronous acquisition, signal processing, etc. There is a certain error, which brings difficulty to the realization of fault judgment technology relying on zero-sequence voltage and current

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  • Automatic time compensation correction method and synchronous sampling universal module
  • Automatic time compensation correction method and synchronous sampling universal module
  • Automatic time compensation correction method and synchronous sampling universal module

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention.

[0032] The invention discloses a general-purpose module that satisfies wide-area synchronization and high-precision sampling, including a control module, a time synchronization module, a clock module, a sampling module, a power supply module and an interface module; a time synchronization module, a clock module, a sampling module and an interface The modules are respectively connected to the control module through the bus; the power supply module provides power for each module; after the time synchronization module generates the PPS signal, the control module starts the interrupt response to the PPS signal, and starts the internal timer until receiving the time synchronization module. Time repo...

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Abstract

The invention discloses an automatic time compensation correction method and a synchronous sampling universal module. The method comprises steps of reserving a sampling channel L0 in a digital-to-analog conversion chip, dividing a debugging analog signal into two paths, and connecting two paths to a conditioning filter circuit channel L1 and the channel L0 of the digital-to-analog conversion chip; the sampling point time Tn0 and the sampling point time Tn1 of the channel L0 and the channel L1 being obtained; tn1-Tn0 is a time error value of the analog signal conditioning filter circuit, digital-to-analog conversion acquisition of channels L1 to L8 is completed, total time Ts1 is recorded, a channel L0 is added for secondary digital-to-analog conversion reading, and the total time of digital-to-analog conversion acquisition is Ts2; and Ts2-Ts1 is a single-channel digital-to-analog conversion time error. The universal module comprises a control module, a time synchronization module, a clock module, a sampling module, a power supply module and an interface module, inherent time error correction is carried out in the time synchronization module, time compensation is carried out in the sampling module by utilizing an automatic time compensation correction method, synchronous sampling precision is high, and applicability is wide.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an automatic time compensation correction method and a synchronous sampling universal module. Background technique [0002] In the primary and secondary equipment of power distribution, the time synchronization between the primary equipment and the secondary equipment, and the high-precision sampling synchronization between the secondary equipment are of great significance to improve the fault perception, analysis, and processing capabilities of the distribution network. Most of the line faults in the distribution network are single-phase ground faults. The fault judgment method is to use the zero-sequence voltage mutation on the bus side as the starting element, and to synthesize the zero-sequence current from the current waveform collected by the terminal device on the line at the same time. Waveform, use related algorithms to realize fault judgment and location, whic...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24215
Inventor 秦海波许晓伟严晗赵哲源赵家明汤同峰伍贤伟吴晨诚朱培军马寿虎
Owner 国网江苏省电力有限公司淮安供电分公司
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