Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof

A technology of electric field measurement and power transmission line, which is applied in electrostatic field measurement, electric variable measurement, current/voltage measurement, etc. It can solve the problems of unsatisfactory application of fault detection and difficulty in specifically judging the fault location of insulators, so as to ensure safety and security The effect of large distance and high voltage level

Inactive Publication Date: 2010-04-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current application of fault detection in insulators is not ideal. The main problem is that it is difficult to specifically determine the specific fault location in a string of insulators.

Method used

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  • Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof
  • Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof
  • Method for testing electricity of ultrahigh-voltage transmission line based on electric field measurement and system thereof

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Effect test

Embodiment 1

[0081] Embodiment 1 UHV transmission line electricity inspection method based on electric field measurement

[0082] The following uses an example to further describe the application process of the technical solution of the present invention:

[0083] See image 3 The shown three-phase double-circuit 500kV transmission line has a total of 6 transmission wires and 2 lightning protection wires.

[0084] 1) Establish measurement points: such as image 3 As shown, the number of measurement points=6×1.4+2=10.4, and 11 are taken here. Therefore, 11 measurement points are selected at a distance of 1.5m from the ground below the vertical transmission line and arranged at equal intervals.

[0085] 2) Obtain the power frequency electric field intensity of the measuring point: using the electric test terminal, the electric field intensity of each measuring point is 2.680kV / m, 4.718kV / m, 7.214kV / m, 7.250kV / m, 8.954kV / m. , 10.706kV / m, 8.954kV / m, 7.250kV / m, 7.214kV / m, 4.718kV / m, 2.680kV / m;

[0086] ...

Embodiment 2

[0090] Embodiment 2 UHV transmission line electricity inspection system based on electric field measurement

[0091] See attached figure 1 , 2 , In another embodiment of the present invention, it is characterized in that it is composed of a test terminal 1 and a data processing center 2;

[0092] 1). The electrical test terminal 1 consists of a power frequency electric field sensor 11, a GPS positioning module 12, a data signal processor 13, a central information processor 14, a GSM data communication module 15, a human-machine interface management module 16 and a power management module 17. Constitute

[0093] a) The power frequency electric field sensor 11 is used to collect the ground electric field signal of the transmission line on site, fixed on the measuring pole, and its output terminal is connected with the input terminal of the data signal processor 13;

[0094] b) The GPS positioning module 12 is used to measure the position of the target measurement point, and its output t...

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Abstract

The invention relates to a method for testing the electricity of an ultrahigh-voltage transmission line based on electric field measurement, which comprises the following steps: 1, establishing a measurement point; 2, measuring an electric field; 3, establishing a transmission line power frequency inverse problem equivalent model; and 4, computing the voltage of the transmission line according to the electric field at the measurement point to obtain the actual voltage of each phase of transmission line, if the voltage of the transmission line is below 30 V, determining the transmission line is electrically neutral, otherwise, determining the transmission line is electrified. The invention also relates to a system for implementing the method for testing the electricity of the ultrahigh-voltage transmission line based on the electric field measurement, which consists of an electricity testing terminal and a data processing centre. The method and the system realize the non-contact electricity testing of the ultrahigh-voltage transmission line and ensure the safety of workers. Because the voltage level of the ultrahigh-voltage transmission line is high and a safe distance is long, the safe, effective and new method for testing the electricity of the ultrahigh-voltage transmission line is provided.

Description

Technical field [0001] The present invention relates to the technical field of ultra-high voltage and ultra-high voltage transmission lines, especially the technical field of ultra-high voltage transmission lines. Background technique [0002] Before the high-voltage transmission line is overhauled, it is necessary to use a tester to test the power line. After the line is confirmed to be uncharged, the overhaul can be carried out to ensure the safety of the staff. At present, the electrical testing technology of 500kV and below at home and abroad is relatively mature and has a wide range of applications. The most commonly used electrical testing poles and electrical testing ropes should be used. [0003] The advantages of the electric test pole and the electric test rope are simple operation and convenient application. However, as the voltage level increases, the safety distance requirement of the line is greater, and the length of the general electric test pole and the electric ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/155G01R29/14G01R31/08
Inventor 杨帆何为何传红籍勇亮
Owner CHONGQING UNIV
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