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Method of multi-range to synthetize full-range panoramic test pulses

A test pulse, full-scale technology, applied in the direction of measuring electrical variables, components of electrical measuring instruments, measuring electricity, etc., can solve problems such as the great influence of cable fault location efficiency and the failure of cable fault location, to reduce field experience and The effect of relying on technical foundation, no test blind area, and improving the efficiency of emergency repairs

Active Publication Date: 2019-07-05
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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  • Method of multi-range to synthetize full-range panoramic test pulses
  • Method of multi-range to synthetize full-range panoramic test pulses
  • Method of multi-range to synthetize full-range panoramic test pulses

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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, considering the development needs of ultra-long submarine cables, consideration is also given to 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-long cable f...

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Abstract

The invention discloses a method of multi-range to synthetize full-range panoramic test pulses. The method includes the following steps: 1) a cable testing range is divided into 3-5 ranges according to a full range; 2) 3-5 different pulses of corresponding numbers are selected according to the 3-5 ranges of the step 1) and according to the following modes; 3) the 3-5 test pulses have reasonable pulse widths and pulse intervals; and 4) a microprocessor drives a high frequency and high voltage electronic switch to perform timely on-off and output, and the 3-5 test pulses with different pulse widths of the 3-5 ranges are synthetized into one set of the test pulses to perform one or more output to be panoramic test pulses. The method can be applied to fault locating of cables without range arrangement and test blind areas, so that the on-site experience requirements and technological base requirements of operators can be reduced, and mis-judgement can be avoided; and the method is accuratein positioning, simple in operation and convenient in implementing.

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 Applications(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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