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High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching

A technology of high-voltage transmission lines and distribution curves, applied in the direction of measuring current/voltage, measuring electrical variables, measuring devices, etc., can solve the problems of cumbersome operation process and low accuracy, and achieve the effect of simplifying the operation process and improving detection accuracy

Inactive Publication Date: 2014-09-03
XIDIAN UNIV
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Problems solved by technology

The known non-contact electrical inspection method is to calculate the charged voltage of the transmission line by inversely calculating the field strength value of a specific measurement point below the transmission line. The operation process of this method is cumbersome and the accuracy is not high.

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  • High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching
  • High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching
  • High voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching

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Embodiment Construction

[0030] In order to make the above and other objects, features and advantages of the present invention more apparent, the following specifically cites the embodiments of the present invention, together with the accompanying drawings, for a detailed description as follows.

[0031] refer to figure 1 with figure 2 , taking the double-circuit transmission line on the same tower as an example, when the height (H1) of the transmission line (one circuit is A, B, C phase, and the other circuit is A1, B1, C1 phase) is determined, the distance below it from the ground must be The vertical electric field intensity difference of the straight line (a) with a height (H2) and perpendicular to the extension direction of the transmission line is determined by the voltage level of the transmission line, that is, when the voltage level of the transmission line is determined, the vertical line (a) at a certain height from the ground below it is perpendicular to the transmission line The distrib...

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Abstract

The invention discloses a high voltage power transmission line live part verification method based on electric field intensity difference distribution curve matching. The method includes the following steps that a measurement curve is obtained; matching calculation is carried out on the measurement curve and a standard map; the data length of the measurement curve is determined, and smooth filtering processing is conducted on the measurement curve and the standard map; equal length processing is conducted on the measurement curve and simulation curves of the standard map; filtering matching is carried out on the measurement curve and the simulation curves of the standard map, and the waveform and the phase of the measurement curve are made to be consistent with those of the simulation curves in the standard map; variance calculation is performed on the measurement curve and the simulation curves of the standard map, the simulation curve which has the smallest variance value with the measurement curve in the standard map is used as a matching curve, when the variance of the field intensity difference value of the measurement curve and the field intensity difference value of the matching curve is smaller than a variance threshold value, the minimum value of the measurement curve is larger than a minimum threshold value, and a power transmission line to be measured is considered to be electrified. By the adoption of the method, whether an object to be measured is electrified or not can be judged only by measuring the electric field intensity difference value on a measurement path, and thus the operation process is simplified.

Description

technical field [0001] The invention belongs to the technical field of electric inspection of high-voltage transmission lines, and in particular relates to a method for realizing non-contact electric inspection by performing pattern matching based on vertical field strength difference distribution curves. Background technique [0002] Before the maintenance of high-voltage transmission lines, it is necessary to use an electroscope to test the power of the transmission lines. After confirming that the lines are not live, the maintenance work can be carried out, so as to ensure the safety of the staff. Nowadays, the high-voltage electrical inspection technology at home and abroad has developed relatively maturely and is widely used. The current electrical inspection technology is mainly divided into two forms: contact electrical inspection and non-contact electrical inspection. [0003] The contact type electric test is to install the electroscope on the operating rod, and use...

Claims

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Application Information

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IPC IPC(8): G01R19/155
Inventor 郭宏福张凤霞高桂华邢文杰
Owner XIDIAN UNIV
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