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A System for Identifying Abnormal Data Based on Merging Units

A technology of abnormal data and data, applied in the direction of instruments, measuring devices, measuring electrical variables, etc., can solve problems such as waveform distortion, protection malfunction, and affecting the reliable operation of power systems

Active Publication Date: 2019-06-25
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In engineering applications, due to external influences such as communication between electronic transformers, collectors and digital merging units, waveform distortion, protection malfunctions and other consequences will be caused, which will affect the reliable operation of the power system

Method used

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  • A System for Identifying Abnormal Data Based on Merging Units
  • A System for Identifying Abnormal Data Based on Merging Units
  • A System for Identifying Abnormal Data Based on Merging Units

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Embodiment Construction

[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0021] see figure 1 , a system for identifying abnormal data based on a merging unit of the present invention includes a transformer, a collector and a merging unit.

[0022] The digital merging unit is configured to receive the sampling message sent by the collector in the electronic transformer; the electronic transformer collects the current and voltage data once, and the collector converts the primary current and voltage data into a digital quantity with a unique message The format is passed to the numerical merge unit;

[0023] The digital merging unit supports messages in multiple formats. After receiving the 256-point sampling data sent by the collector, the data in the IEC 61850-9-2 format is interpolated and sent to the protection device...

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Abstract

The present invention discloses a system for abnormal data identification based on a merging unit. The system comprises a mutual inductor, a collector and a merging unit. The mutual inductor collects one-time current and voltage data, performs integration conversion to form digital quantity and transmits the digital quantity to the collector; the merging unit receives sampling data sent from the collector, performs protocol conversion and sends the sample data to a protective device; and the merging unit receives sample instant data of the collector and calculated adjacent sample point instant difference of phase current and phase voltage in real time, regulates the maximum sampling value of the last cyclic wave in real time through each cyclic wave according to the sampling cyclic wave amplitude and the sampling frequency of the message sent by the collector, and repeatedly calculates the mutation threshold value according to the value, determines whether the adjacent sampling point instant difference value exceeds the mutation threshold value or not, reports the sample abnormality when the instant difference value exceeds the mutation threshold value and marks the sampling points having the instant difference value exceeding the mutation threshold value as the mutation value. The system for abnormal data identification based on the merging unit can rapidly determine the abnormal data output by the collector so as to avoid logic misjudgement of a transformer station protection control device.

Description

technical field [0001] The invention relates to a system for identifying abnormal data based on a merging unit, and belongs to the technical field of intelligent automatic safety devices for substations. Background technique [0002] Electronic transformers and collectors are an indispensable part of substations, and are closely related to protection, measurement and control, measurement and other links. In engineering applications, the communication between electronic transformers, collectors and digital merging units will be affected by the outside world, resulting in waveform distortion, protection malfunction and other consequences, affecting the reliable operation of the power system. How to quickly and accurately detect secondary transformer faults and ensure reliable operation of the sampling system has become an important issue faced by power users and equipment manufacturers. Contents of the invention [0003] In view of the deficiencies in the prior art, the pur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 谢坤陈福锋龚世敏赵谦
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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