A method for calculating the equivalency of icing conditions between insulator and transmission line

A calculation method and insulator technology, applied in the field of effectiveness calculation, can solve the problems of not paying attention to icing, the difficulty of obtaining the icing status of insulator strings, and the lack of observation and evaluation methods for the severity of icing in transmission lines, so as to save manpower and material resources, The effect of improving operational reliability

Inactive Publication Date: 2018-12-21
GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for calculating the equivalence of the icing state of the insulator and the wire, so as to solve the problem that the existing technology only studies the icing of the wire alone, and does not measure the icing of the insulator, so as to obtain the icing of the insulator string Due to the difficulty of the state, the lack of attention to the relationship between the two icing characteristics makes the current transmission line site lack effective implementation of icing severity observation and evaluation methods and other technical problems

Method used

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Embodiment Construction

[0016] A method for calculating the equivalent state of an insulator and a wire covered with ice, comprising:

[0017] Step 1. Measure the wire ice thickness L d ;

[0018] Step 2. According to the thickness L of ice coating on the wire d Calculation of insulator ice thickness L j ;

[0019] Step 3. Measure the distance d of the ice edge gap and the spacing L of the umbrellas,

[0020] Step 4. Calculate the ice-covered bridging coefficient η.

[0021] The insulator ice thickness L j The calculation formula is

[0022] L j = K 1 × K 2 × K 3 × L d ; where: L d is the thickness of ice coating on the wire, L j is the ice thickness of the insulator; K 1 、K 2 、K 3 They are correction coefficients of temperature, rainfall content and wind speed respectively; also called weight coefficient; The relationship curve between the icing state of the insulator is determined.

[0023] The formula for calculating the ice-covered bridging coefficient η is

[0024] η=(L-d) / L×1...

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Abstract

The invention discloses a method for calculating the equivalency of icing conditions between insulator and transmission line. The method comprises the following steps. Step 1: The thickness of ice cover on transmission line (Ld) is measured. Step 2: The thickness of ice cover on insulator (Ld) is calculated based on the thickness of ice cover on transmission line (Ld). Step 3: The distance betweenthe icicles (d) and the umbrella distance (L) are measured. Step 4: the bridging coefficient of ice cover (eta) is calculated. The invention solves the problem encountered in determining icing conditions of insulators, significantly reduces labor and costs and improves the reliability of transmission lines. The conventional technologies solely focuses on the ice cover around transmission lines with neither the measurement of ice cover around insulators nor the attention to the relations among the features of these two kinds of ice covers, resulting in the lack of effective technical means forobserving and assessing the severity of ice coating of power transmission lines in field.

Description

Technical field: [0001] The invention belongs to the technical field of ice coating monitoring, in particular to a method for calculating the equivalence of ice coating states of insulators and wires. Background technique: [0002] The external insulation strength of transmission lines is the basic condition to ensure the normal operation of lines and equipment, and the quality of external insulation design is an important indicator for evaluating the design quality. Transmission lines of different voltage levels have different choices of air gaps, number and types of insulators according to their maximum operating voltage. At present, the design method of external insulation configuration of transmission lines mainly relies on true-type tests and operating experience. Since the ice flashover characteristics of insulators are directly related to their icing state, the icing flashover characteristics of insulators are the main reference for the configuration of icing insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00G01B21/08G01B21/16
CPCG01B21/00G01B21/08G01B21/16
Inventor 马晓红毛先胤赵超张迅曾华荣黄欢田承越牛唯许逵穆青青梁轶峰潘哲哲刘晓波
Owner GUIZHOU POWER GRID CO LTD
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