Calculation method for blanking length mathematical model of flexible lead of 500kV substation

A technology of mathematical models and calculation methods, applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve problems such as affecting calculation results, ignoring the structural relationship of insulator strings, etc., to achieve accurate mathematical results, guarantee consistency, and high The effect of credibility

Active Publication Date: 2014-07-30
FUZHOU UNIV
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Problems solved by technology

Divide the soft wire into two parts, the insulator string and the wire, approximate them to three straight lines, and calculate the soft wire equivalent to the trapezoidal model. This algorithm also ignores the structural relationship between the internal parts of the insulator string, which affects the calculation results.

Method used

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  • Calculation method for blanking length mathematical model of flexible lead of 500kV substation
  • Calculation method for blanking length mathematical model of flexible lead of 500kV substation
  • Calculation method for blanking length mathematical model of flexible lead of 500kV substation

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Embodiment Construction

[0050] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0051] A kind of 500kV transformer substation soft wire blanking length mathematical model calculation method of the present invention comprises the following steps,

[0052] Step S01: Analyzing the physical structure of flexible conductors, insulators and fittings and the connection mode of flexible conductors as input parameters;

[0053] Step S02: Determine the sag value of the soft conductor according to the needs of the site construction, and calculate the horizontal stress through the simplified sag inversion formula ;

[0054] Step S03: Analyze and calculate the resultant force T0 on the U-shaped hanging rings on both sides of the suspension iron frame, and judge whether it is less than the breaking load [T0] of the U-shaped hanging rings. If yes, go to step S04; if not, go to step S02;

[0055]Step S04: Use the catenary method ...

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Abstract

The invention relates to a calculation method for a blanking length mathematical model of a flexible lead of a 500kV substation. The method comprises the steps of firstly determining an input parameter and resolving a horizontal stress Rho0 by a sag inverse formula; judging whether the resultant force T0 of suspension points at two sides of the flexible lead is smaller than the damage load gravity [T0] of a U-shaped hanging ring; calculating the space position and stress condition of each part by a catenary method from insulator strings at left and right sides in sequence; then judging whether the resultant force T1 at the connection position between the flexible lead and a tension resistant string clamp is smaller than the maximum bearing pull force [T1] of the lead; then dividing the lead into a plurality of equal parts and resolving the space position and stress of each section of lead by using the catenary method; finally judging the horizontal stress of the lowest point and calculating the actual sag and blanking length of the lead. The spatial form of each part of the flexible lead can be accurately presented, the sag size of the flexible lead is controlled, the accurate blanking length of the flexible lead is calculated, the consistency of the spatial form of the three-phase lead is ensured and the calculation method has very high credibility.

Description

technical field [0001] The invention relates to the technical field of electric energy transmission line construction, in particular to a mathematical model calculation method for the cutting length of flexible conductors in 500kV substations. Background technique [0002] The invention is applied to the calculation of the blanking length of flexible conductor construction in substations, and is mainly suitable for flexible conductors in 500KV substation projects, and belongs to a mathematical model for calculating the blanking length of conductor construction with short distances and insulator strings. [0003] The current research on the mathematical model of overhead lines mainly focuses on transmission and distribution lines, which belong to long-distance lines. Its characteristic is that the overhead line is assumed to be a flexible rope, and accessories such as insulators, strain clamps, and fittings have little influence on the mathematical model of overhead lines. , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 黄宴委林妙涵王庭桉
Owner FUZHOU UNIV
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