Fuzzy-logic-based ice-covered power transmission line state estimation method

A state assessment, transmission line technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inability to provide comprehensive early warning, failure to consider horizontal load overload, ground wire and its support damage, etc., to achieve the characteristics Scientific calculation methods, comprehensive status assessment content, and the effect of improving accuracy
CN102033982AActive Publication Date: 2011-04-27SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2011-04-27

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Abstract

The invention discloses a fuzzy-logic-based ice-covered power transmission line state estimation method, which comprises the following steps of: 1, determining and calculating a characteristic quantity of a specific estimated content in two aspects of the mechanical performance and the electric external insulation performance of a lead wire, a ground wire and a tower which serve as objects according to a monitoring parameter; 2, determining a fuzzy logic inference system and an input characteristic quantity and an output quantity thereof, and designing a membership function; 3, building the fuzzy logic inference system, designing a fuzzy rule, and inferring state fuzzy results of the mechanical performance and the electric performance; and 4, defuzzifying the fuzzy results obtained in the step 3 by a centroid anti-fuzzification method, and outputting a fuzzy subset with the maximum membership according to a maximum membership principle to obtain a state estimated result. The method has the advantages of comprehensive estimated content, scientific calculation mode, high accuracy and effectively prevented faults on a power transmission line.
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Description

technical field

[0001] The invention relates to the technical field of on-line monitoring of icing on overhead transmission lines in the field of electric power, in particular to a state evaluation method for icing transmission lines based on fuzzy logic. Background technique

[0002] my country is one of the countries in the world where transmission lines are seriously covered with ice. Severe ice and snow accumulation will lead to a sharp decline in the mechanical and electrical performance of transmission lines, causing accidents such as insulator flashover, line tripping, line disconnection, tower collapse, conductor galloping, and communication interruption. At the beginning of 2008, some provinces in southern my country suffered from the most serious freezing rain and snow disasters in the past 80 years. Ice flashes occurred frequently, and accidents such as line tripping, disconnection and tower collapse were common, which threatened the safe and stable operation of t...

Claims

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