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A Kalman filter-based early fault detection method for transmission lines

A Kalman filter and transmission line technology, which is applied in the direction of fault location, fault detection according to conductor type, and testing of electrical devices in transportation, etc., can solve the problem of no early fault distinction, etc., and achieve the effect of simple algorithm and reliable detection

Active Publication Date: 2019-07-02
JIMEI UNIV
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Problems solved by technology

But they do not differentiate the degree of early failure

Method used

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  • A Kalman filter-based early fault detection method for transmission lines
  • A Kalman filter-based early fault detection method for transmission lines
  • A Kalman filter-based early fault detection method for transmission lines

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Embodiment Construction

[0031] To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

[0032] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0033] figure 1 A flow chart of a method for detecting a state of a transmission line based on a Kalman filter according to an embodiment of the present invention is shown. exist figure 1 in, V n and I n They are m...

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Abstract

The invention relates to a power transmission line early fault detection method based on a Kalman filter. The method comprises the following steps: carrying out Kalman filter slow dynamic estimation on a monitoring current signal of a power transmission line to obtain an estimated current signal; comparing the monitoring current signal of the power transmission line with the estimated current signal, and serving the difference value between the monitoring current and the estimated current as a first standard signal; comparing the first standard signal and a fault state current threshold value of the power transmission line and making a preliminary diagnosis according to the comparison result; carrying out Kalman filter fast dynamic estimation on a monitoring voltage signal of the power transmission line to obtain an estimated voltage signal; carrying out square wave fitting on the estimated voltage signal, and serving the difference value between the absolute value and the mean value of a square wave voltage signal obtained after fitting as a second standard signal; and comparing the second standard signal with a mild early failure state voltage threshold value of the power transmission line, and confirming or denying the preliminary diagnosis according to the comparison result.

Description

technical field [0001] The invention belongs to the field of power fault detection, and in particular relates to an early fault detection method of a transmission line based on a Kalman filter. Background technique [0002] As the lifeline of a ship, the power transmission system of a ship, like human health, will appear in a "sick" situation, that is, failure; in addition, the ship's working environment is complex and the weather is changeable, which makes its power transmission system failure unavoidable. The ship power transmission system, which is regarded as the "sub" version of the land power system, has the same working principle as the land power system, so the same method as the land power system is currently used to detect the failure of the ship power transmission system. However, since the early fault of the transmission line is a kind of arc fault that can be automatically cleared, the duration of the early fault is short, and the amplitude increase is small, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/008G01R31/085G01R31/088
Inventor 王荣杰许奇歆周海峰蒋德松
Owner JIMEI UNIV
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