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Fault point location method and system

A calibration method, accident technology, applied in fault location, fault detection according to conductor type, electrical components, etc., can solve problems such as disproportion

Inactive Publication Date: 2012-09-19
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, it is assumed that the size of the error is not simply proportional to the calibration distance, and there may be cases where the two are completely out of proportion due to the state of the accident.

Method used

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  • Fault point location method and system
  • Fault point location method and system
  • Fault point location method and system

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Embodiment Construction

[0029] According to one embodiment, there is shown an accident point calibration method for calibrating an accident point using the voltage and current of each terminal of a transmission line to be calibrated, and the transmission line constant. In this method, from the basic expression of the distributed constant circuit equation using the hyperbolic function, the expression simplified by the quadratic approximation of the approximate expression using the hyperbolic function is obtained, or the expression is obtained by using both sides of the hyperbolic function. The simplified formula of the division operation. Using this simplified formula, the calibration distance from the specified end of the transmission line to the accident point is calculated.

[0030] (1) First Embodiment

[0031] Below, refer to Figure 1 ~ Figure 4 , and the first embodiment will be described. figure 1 is a block configuration diagram of the accident point calibration system according to the fi...

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Abstract

According to an embodiment, a fault point location method of locating a fault point by using a voltage and a current of each terminal of a transmission line to be located and a transmission line constant is disclosed. According to the method, a formula simplified by a secondary approximation using an approximation of a hyperbolic function from a basic equation of a distributed constant circuit equation using the hyperbolic function or a formula simplified by a division of both sides by the hyperbolic function is determined. A location distance from a predetermined end of the transmission line to the fault point is calculated by using the simplified formula.

Description

technical field [0001] Embodiments of the present invention relate to a method and a system for calibrating an accident point of a power transmission system. Background technique [0002] Generally, the accident point calibration utilizes the condition that the voltage at the accident point seen from both ends of the calibration object interval is equal. Determine the distance to the accident point. The calibration accuracy of the accident point in the transmission system will have a greater impact on the recovery time. Therefore, in the accident point calibration technology of power transmission system, the improvement of calibration accuracy is always sought. [0003] Here, refer to Figure 8 , the conventional accident point calibration method will be specifically described. exist Figure 8 Among them, (a) is the circuit diagram of the transmission line as the calibration object, and (b) is the voltage distribution diagram along the length direction of the transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCH02H7/263G01R31/085
Inventor 高荷英之庄野贵也
Owner KK TOSHIBA