Apparatus and method for positioning parallel double electricity transmission line
A technology for fault location and power transmission lines, which is applied to fault locations, measuring devices, and fault detection according to conductor types. It can solve problems such as difficult fault location methods, wrong fault location, and impossible to obtain location results.
Inactive Publication Date: 2002-07-17
株式会社赛尔鲍尔 +3
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Problems solved by technology
In other words, the problem with the later fault location methods that no longer use the source impedance of their own terminal is that although these methods compensate for the fault resistance and load, it is impossible to obtain correct location results due to the sensitivity of the phase angle
Therefore, the fault location method for obtaining voltage and current data on the other side is difficult to adopt
[0008] Therefore, there is a problem in the conventional fault location device that only utilizes its own terminal information that errors may occur in fault location
Method used
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[0026] figure 1 is used to represent the structure of the fault location device for parallel dual power transmission lines arranged on one power transmission line according to the present invention picture .
[0027] refer to figure 1 , apply the voltage and current signals from the main voltage transformer C and main current transformer B on the transmission line to the fault location device E, and measure the transmission line fault and fault distance according to the corresponding fault location algorithm. In addition, a digital signal indicating a fault is provided from the protection relay D1 to the fault location device E, and calculations are performed based on the information before and after the fault of the corresponding transmission line. In this regard, the fault distance refers to the distance from the installation point of the main current transformer to the fault point P.
[0028] Apply voltage and current signals from the main voltage transformer C and mai...
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A method and an apparatus for a trouble-location on a transmission line of a concurrent double line are provided. The method includes the steps of: converting a three-phase voltage and current signal on the transmission line to a small signal; collecting and storing the converted voltage and current value as data; comparing the data with predetermined reference data to determine the trouble of the transmission line as well as trouble types; separating and obtaining the voltage and current data after and before the trouble responding the comparing step; performing trouble location algorithm for the obtained data based on a predetermined starting mode to get a current distribution factor, and caculating the trouble distance and trouble information at the trouble point by utilizing the current distribution factor.
Description
technical field [0001] The present invention relates to a transmission line fault location device and method, in particular to a method that can locate a fault in a parallel transmission line by using voltage and current information and its own terminal current distribution coefficient when a ground fault or short circuit occurs on a parallel double transmission line. Apparatus and method for a fault point on a dual power transmission line. Background technique [0002] As power consumption continues to increase, transmission line systems become more diverse, more complex and carry EHV. In addition, fast and correct location of faults becomes more important in terms of stable power supply, since the reliability of the power supply system can be enhanced by quickly isolating a faulty system from a normal system, emergency restoration, and the like. Accordingly, power companies operate transmission line fault locator devices that are installed in order...
Claims
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Login to View More IPC IPC(8): G01R31/08
CPCG01R19/16566G01R31/085H03M1/12
Inventor 李在京李承宰姜相熙崔勉松
Owner 株式会社赛尔鲍尔