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Method for defining wrong data of intelligent device in power supply system

An error data, intelligent device technology, applied in the field of error data definition, can solve problems such as difficulty in determining the threshold value, refusal to operate the device, and difficulty in deriving the sampling value.

Active Publication Date: 2012-12-05
NARI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is suitable for defining error data when the fault is in a steady state, but when a serious fault is in a transient state, the difference between the sampling values ​​of the device may exceed the threshold value set when the fault is in a steady state, making the device Misjudged as wrong data, causing the device to refuse to move
In addition, in some cases, it may be difficult to calculate the sampled value in the steady state of the device at the time of the most severe fault, making it difficult to determine the value of

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  • Method for defining wrong data of intelligent device in power supply system
  • Method for defining wrong data of intelligent device in power supply system
  • Method for defining wrong data of intelligent device in power supply system

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Embodiment Construction

[0033] The following is based on the fact that the device will not continuously collect two wrong data, and analyze various situations of continuous three-point sampling values.

[0034] figure 1 The difference between y(k-1) and y(k-2) does not exceed the closing value, and the difference between y(k) and y(k-1) does not exceed the closing value, then define y(k) and y(k- 1) is normal data.

[0035] figure 2 If the difference between y(k-1) and y(k-2) does not exceed the closing value, but the difference between y(k) and y(k-1) exceeds the closing value, then y(k-1) is defined as normal data, Whether y(k) is wrong data should be judged by the value of y(k+1). image 3 with Figure 4 is equivalent to analyzing whether y(k-1) is wrong data.

[0036] image 3 The difference between y(k-1) and y(k-2) exceeds the closing value, and the difference between y(k) and y(k-1) also exceeds the closing value, and these three points change monotonously, that is, the middle y(...

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Abstract

The invention discloses a method for defining wrong data of an intelligent device in a power supply system. The current sampling point is defined as a kth point, a point next to the current sampling point is defined as a (k+1)th point, a point previous to the current sampling point is defined as a (k-1)th point, and a point two position previous to the current sampling point is defined as a (k-2)th point; the sampling values of the points are y(k), y(k+1), y(k-1) and y(k-2) respectively; a maximum threshold value of the difference of the sampling values which is allowable by the device is setaccording to the sampling value in a steady state when the device has the most serious failure; and the threshold value is taken as a precondition for defining whether the sampling value is the wrongdata or not. By the method, the wrong data possibly occurs in the sampling of the device caused by noise or interference in the system, or hardware failures such as sampling abnormality or software failures such as program running out and the like in the device can be filtered, and time lag caused by the conventional software and hardware filtering method can be obviously reduced.

Description

technical field [0001] The invention relates to a method for defining error data applicable to an intelligent device in a power supply system, and belongs to the field of electrotechnical technology. Background technique [0002] The intelligent device in the power supply system usually obtains the sampled value through sampling, and judges and controls accordingly. If there is noise or interference in the system, or if the device has hardware failures such as abnormal sampling or software failures such as program runaway, the sampling of the device may have wrong data, which may easily cause wrong judgment and control of the device. [0003] Smart devices usually filter out erroneous data through hardware filtering or software filtering, but conventional software and hardware filtering methods will produce time lag, slow down the speed of judgment and control, and sometimes it is difficult to identify and filter out real erroneous data. One method is to set the closing val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07
Inventor 李钢赵驰彭继红史耀政
Owner NARI TECH CO LTD
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