D-S-evidence-theory-based distribution automation terminal state diagnosis method

A technology for power distribution automation and terminal status, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., and can solve the problems of complex failure mechanism, lack of terminal state sensing means, and difficult signal monitoring and analysis.

Active Publication Date: 2017-07-07
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The distribution automation terminal is an electronic device with a complex failure mechanism. Signals deeply related to various faults are o...

Method used

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  • D-S-evidence-theory-based distribution automation terminal state diagnosis method
  • D-S-evidence-theory-based distribution automation terminal state diagnosis method
  • D-S-evidence-theory-based distribution automation terminal state diagnosis method

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Experimental program
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Embodiment Construction

[0066] like figure 1 As shown, the steps of the method for diagnosing the state of the distribution automation terminal based on the D-S evidence theory in this embodiment include:

[0067] 1) Calculate the specified state characteristic quantity from the operation information uploaded from the distribution automation terminal to the distribution master station;

[0068] 2) Classify the distribution automation terminal state, and construct the fuzzy membership function corresponding to different distribution automation terminal states for the state feature quantity;

[0069] 3) Determine the various membership degree parameters of the fuzzy membership degree function;

[0070] 4) For the evidence corresponding to each state feature quantity, according to the fuzzy membership degree of the state feature quantity corresponding to different distribution automation terminal states, calculate each single-element proposition A corresponding to each evidence i and by the single-ele...

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Abstract

The invention discloses a D-S-evidence-theory-based distribution automation terminal state diagnosis method. The method comprises: statistics of designated state characteristic quantities is carried out from operating information uploaded to a main distribution station from a distribution automation terminal; distribution automation terminal states are graded and a fuzzy membership function, corresponding to different distribution automation terminal states, of the state characteristic quantities is constructed; various membership parameters of the fuzzy membership function are determined; with the distribution automation terminal state grading result as a single element proposition, a basic probability assignment function and an evidence fusion result are calculated for the single element proposition and an identification frame; and matching is carried out on the evidence fusion result and a preset terminal state diagnosis decision-making criterion, so that a current state of the distribution automation terminal is obtained. According to the invention, the state of the distribution automation terminal can be determined accurately based on the operating information; the detection result is accurate and reliable; the diagnosis becomes convenient and rapid; and the operability is high.

Description

technical field [0001] The invention relates to a state diagnosis technology of a distribution automation terminal, in particular to a method for diagnosing a state of a distribution automation terminal based on D-S evidence theory. Background technique [0002] The operating state of the distribution automation terminal is directly related to whether the entire distribution automation system can function effectively. However, this type of equipment is usually installed directly outdoors or in a simple sheltered environment, which is easily affected by harsh environments and external environments. In addition, the quality of equipment from different manufacturers varies, so various abnormalities of unknown reasons often occur. In order to grasp the status information of the terminal, so as to arrange maintenance in time before the failure occurs, it is necessary to carry out online status diagnosis of the terminal. [0003] The distribution automation terminal is an electro...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 陈宏牟龙华郭文明冷华朱吉然唐海国龚汉阳张志丹王伊建
Owner STATE GRID CORP OF CHINA
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