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A Method of Merging Units to Eliminate Single Point Abnormal Data

An abnormal data, single-point technology, applied in the field of power systems, to simplify processing algorithms, improve reliability, and avoid load fluctuations

Active Publication Date: 2019-02-15
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it uses the data of the opposite side as a reference, which is only effective for the differential protection device, and cannot solve the problem of maloperation of the protection device without the opposite side

Method used

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  • A Method of Merging Units to Eliminate Single Point Abnormal Data

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Embodiment Construction

[0018] The method for eliminating single-point abnormal data by the merging unit provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below according to the drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 As shown, the method for merging units of the present invention to eliminate single-point abnormal data includes the following steps performed in order:

[0021] Step 1) Obtain the actual sampling value of a certain sampling point that the merging unit prepares to send;

[0022] Step 2) calculate the ideal sampling value corresponding to the above-mentioned actual sampl...

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Abstract

The invention discloses a method of eliminating single point abnormal data from a merging unit. The method comprises steps: an actual sampling value of a certain sampling point which is about to be sent by the merging unit is acquired; an ideal sampling value corresponding to the actual sampling value is calculated; mutation characteristics of the actual sampling value which is about to be sent by the merging unit are judged; the calculated ideal sampling value is used for replacing the actual sampling value and is sent; and the actual sampling value of the current sampling point is sent. The method of eliminating single point abnormal data from the merging unit disclosed by the invention has the beneficial effects that through comparing original sampling point data before and after the sampling point, the single point abnormal data can be effectively eliminated, the sensitivity is controlled according to the size of a threshold, load fluctuation can be effectively avoided, the method can be used for current and voltage single point abnormal data elimination, the performance of the merging unit can be improved at a source end, protection at a rear end and the processing algorithm of a measurement and control device are simplified, the system operation level can be effectively improved, and the device reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of power systems, in particular to a method for merging units to eliminate single-point abnormal data. Background technique [0002] In recent years, the smart substation has entered a period of comprehensive construction. However, the merging unit of the smart substation is responsible for converting the analog voltage and current into digital voltage and current. All subsequent protection and measurement and control devices must obtain data from the merging unit; If the merging unit sends single-point abnormal data due to electromagnetic interference and other reasons, it is likely to cause malfunction of the protection device. There have been many accidents in the field where the protection device malfunctioned due to the abnormal sampling data sent by the merging unit. The general processing method is to eliminate single-point abnormal data on the side of receiving sampled values, which will cause incon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 兰春虎李盛伟王兆峰范伟范须露
Owner STATE GRID TIANJIN ELECTRIC POWER
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