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A method for synthesizing full-scale panorama test pulses with multiple ranges

A test pulse, full-scale technology, applied in the measurement of electrical variables, components of electrical measuring instruments, and electrical measurement, can solve the problems of cable fault location failure and great influence on cable fault location efficiency, reducing field experience and efficiency. Relying on technology foundation, no test blind zone, obvious effect of waveform characteristics

Active Publication Date: 2021-06-15
XIAN FRIEND ELECTRONICS T&S
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Problems solved by technology

The 20km, 30km or 50km full-scale range here often corresponds to the length range of land cables, and the 50km, 100km or 200km full-scale range often corresponds to the length range of submarine cables. Each range corresponds to the corresponding test pulse width and different test sampling frequencies. , when the instrument is used, the on-site operator manually selects the test range according to the actual situation for cable fault testing. Limited to the operator's field experience and technical foundation, the correct setting of the test range has a great impact on the efficiency of cable fault location, especially in the case of When the near-end fault of a long cable is encountered, it often even causes the cable fault location to fail

Method used

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  • A method for synthesizing full-scale panorama test pulses with multiple ranges
  • A method for synthesizing full-scale panorama test pulses with multiple ranges
  • A method for synthesizing full-scale panorama test pulses with multiple ranges

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Embodiment

[0033] Below to figure 2 The schematic diagram of synthesizing test pulses with 4 ranges and 4 kinds of pulse widths into a group of test pulses and outputting them at one time is taken as an example for specific explanation.

[0034] According to the current longest domestic submarine cable is less than 100km, the example of this method takes a full range of 160km, which fully meets the technical requirements for the compatible use of land cables and submarine cables in the domestic market; at the same time, taking into account the development needs of ultra-long submarine cables, also consider taking into account overhead lines fault testing requirements.

[0035] Then the 160km full-scale range is divided into the following four test ranges according to the application objects:

[0036] 750m, suitable for near-end fault testing of short cables and long cables;

[0037] 3.3km, suitable for most land cable fault tests;

[0038] 33km, suitable for a small number of ultra-l...

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Abstract

A method for synthesizing full-scale panoramic test pulses with multiple ranges, comprising the following steps: 1) dividing the cable test range into 3-5 ranges according to the full scale; 2) selecting the corresponding number 3-5 according to step 1) 3-5 ranges 5 different pulses: and select according to the following method: 4) 3‑5 test pulses should have reasonable pulse width and pulse interval; 3-5 test pulses with different pulse widths in a range are synthesized into a group of test pulses and output once or multiple times as panorama test pulses. This method can be applied to cable fault location without measuring range setting, without test blind area, reducing the requirements for operators’ field experience and technical foundation, avoiding misjudgment, accurate positioning, simple operation and convenient implementation.

Description

technical field [0001] The invention relates to a pulse synthesis method, in particular to a method for synthesizing full-range panorama test pulses with multiple ranges. Background technique [0002] With the rapid development of various electrical insulating material technologies and new energy technologies, various high-voltage cables for transmitting electric energy have also been rapidly developed. They are space-saving, beautiful, environmentally friendly and safe. [0003] However, the rapid development of urbanization in municipal construction and municipal renovation construction, as well as the rapid increase in the amount of high-voltage cables have caused an increase in cable faults, endangering the safe operation of the power grid. How to improve the efficiency of cable fault location and shorten the repair time of cable faults is becoming more and more important. In the traditional cable fault detection instrument, there are many operations to reasonably set th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R1/28
CPCG01R1/28G01R31/083G01R31/088
Inventor 唐志龙朱成东刘智成张洪陈王学义胡晓宏
Owner XIAN FRIEND ELECTRONICS T&S
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