Judging method of suspension curve model for power line sag calculation

A judgment method and power line technology, which is applied in calculation, electrical digital data processing, special data processing applications, etc., can solve problems such as inaccurate sag calculation, and achieve the effect of small calculation amount, high calculation accuracy and improved accuracy

Active Publication Date: 2012-08-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] The purpose of the present invention is to propose a suspension curve model judgment method for power line sag calculation in view of the current power line sag calculation that randomly sets the suspension curve model that the power line sag satisfies, which leads to inaccurate sag calculation

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  • Judging method of suspension curve model for power line sag calculation
  • Judging method of suspension curve model for power line sag calculation
  • Judging method of suspension curve model for power line sag calculation

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Embodiment Construction

[0027] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0028] figure 1 It is a flowchart of the determination method provided by the present invention. figure 1 In , the method for judging the suspension curve model used for power line sag calculation includes:

[0029] Step 1: Acquire a power line image.

[0030] The power line image is first obtained by shooting tools such as cameras and video cameras. Generally, the image of the power line between two adjacent towers is obtained.

[0031] Step 2: Extract power line image features to form a power line feature point set.

[0032] Image feature extraction technology is used to extract the image features of the power line to form a power line feature point set.

[0033] Step 3: Select a single power line feature point...

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Abstract

The invention discloses a judging method of a suspension curve model for power line sag calculation, belonging to the technical field of installation and maintenance of power equipment. The judgment method comprises the following steps of: obtaining a power line image; extracting power line image characteristics; selecting a characteristic point set of single power line for sag calculation from power line image characteristic point sets; determining two end points of the single power line in the characteristic point set of the single power line and calculating a gradient k of a straight line for connecting the two end points; calculating tangency point coordinates of the straight line which takes the k as the gradient and the single power line; calculating parameters of the suspension curve model according to the tangency point coordinates; respectively determining a catenary curve, an inclined parabola curve and a horizontal parabola curve; respectively calculating Hausdorff distances between the single power line and the catenary curve, and between the inclined parabola curve and the horizontal parabola curve; and taking a model corresponding to the curve with the minimum Hausdorff distance as the suspension curve model for meeting the requirement of the power line. The judging method disclosed by the invention improves the precision of the power line sag calculation.

Description

technical field [0001] The invention belongs to the technical field of electric equipment installation and maintenance, and in particular relates to a suspension curve model judgment method for power line sag calculation. Background technique [0002] Power line sag is an important indicator of transmission line design and operation, and is related to the operation safety of transmission lines. Excessive sag not only limits the transmission capacity of the line, but also easily causes grounding short-circuit accidents. In order to ensure the safe operation of the transmission line and the equipment being spanned, it is necessary to verify or monitor the sag in real time. [0003] At present, there are some inventions of sag online monitoring devices, but none of them have been applied to engineering practice. Image processing technology has excellent characteristics of precision and high efficiency, so the calculation method of power line sag based on image processing has b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 赵振兵王琴高强
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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