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A method for evaluating icing risk of transmission line

A technology for transmission lines and risk assessment, applied in the direction of instruments, data processing applications, resources, etc., can solve problems such as inability to determine the level, and achieve the effect of convenient operation and simple calculation ideas.

Active Publication Date: 2019-01-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] There are certain defects in using the TOPSIS method directly for evaluation, because this method can only sort the evaluation results of each program, and cannot determine the grade, that is, whether its health degree belongs to good, good, average, poor or poor

Method used

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  • A method for evaluating icing risk of transmission line
  • A method for evaluating icing risk of transmission line
  • A method for evaluating icing risk of transmission line

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Embodiment Construction

[0026] The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0027] 1 Risk level definition of transmission line icing state

[0028] According to the possible impact degree, scope and development trend of the icing event on the transmission line, the present invention divides the risk level of the icing state of the transmission line into five levels according to the ice thickness range: level I (mild), level II (general), grade III (moderate), grade IV (severe), and grade V (very serious), which are represented by gray, blue, yellow, orange and red in turn, as shown in Table 1.

[0029] Table 1 Classification of icing risk levels

[0030]

[0031] Level I icing: mild icing, ice thickness ranges from 0 to 5mm, short icing time, small changes in meteorological factors, slow growth rate of icing, low degree of harm, icing on lines can fall off naturally.

[0032] Class II icing: general icing, the thickness of the ice is 5-10mm,...

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Abstract

The invention belongs to the technical field of transmission line icing risk assessment, in particular to a transmission line icing risk assessment method. The method comprises the following steps: according to the possible influence degree, influence range and development trend of transmission line icing event, the transmission line icing state risk grade is divided into five grades according tothe ice thickness range; the final risk assessment indexes are extracted from meteorological factors, environmental factors and route parameters, and the route icing risk assessment index system is established. Consistency and dimensionless pretreatment of indicators; determining the Weighted Standardized Decision Matrix by Entropy Weight Method; the TOPSIS method is used to determine the positiveand negative ideal solutions of weighted standardized decision matrices. The matter-element extension method is used to divide the positive and negative ideal solution intervals and calculate the closeness degree. Calculating the eigenvalue, dividing the grade of each evaluation scheme, and judging the grade of the evaluation object. The invention is used for evaluating the icing risk of transmission lines and provides support for the risk management work of the power grid management department.

Description

technical field [0001] The invention belongs to the technical field of icing risk assessment of transmission lines, and in particular relates to a method for icing risk assessment of transmission lines. Background technique [0002] The risk assessment of the icing status of transmission lines is the basis for building the ice disaster defense system of the power grid. A scientific and reasonable icing risk assessment model is helpful for timely and accurate early warning of possible freezing disaster risks, thus effectively ensuring the safety of the power grid. Stable operation, reducing the occurrence of freezing disasters. At present, there is a lack of scientific, practical and comprehensive assessment models for power line icing assessment to guide transmission line design and ice disaster emergency management. Therefore, online monitoring data should be fully utilized, and scientific assessment models should be effectively combined to systematically carry out transmis...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 牛东晓王海潮李偲陈寒钰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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