Ultra high voltage transmission line air gap rain flash test device and method

An air gap and transmission line technology, which is applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of the size and structure of the test device that cannot be used in the air gap rain flash test, so as to reduce time and manpower, and save water resources. , the effect of improving work efficiency

Active Publication Date: 2017-08-18
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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Problems solved by technology

The above test methods are not suitable for the requirements of UHV transmission line air gap rain flash test, and the size and structure of the test device cannot be used for UHV transmission line air gap rain flash test.

Method used

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  • Ultra high voltage transmission line air gap rain flash test device and method
  • Ultra high voltage transmission line air gap rain flash test device and method
  • Ultra high voltage transmission line air gap rain flash test device and method

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Embodiment Construction

[0024] Such as figure 1 with figure 2 As shown, the UHV transmission line air gap rain flash test device of the present invention includes a test line 1, a test tower 2, a pressurizing device, a rainwater spray device and a rainfall control device. The test line 1 can use the actual UHV transmission line of any specification. The test tower 2 includes simulated tower legs and cross arms made of high-strength angle steel. The tower legs are provided with spikes parallel to the test line to simulate the actual tower structure. . The pressurizing device is used to apply the breakdown voltage to the test line 1. Since the UHV transmission line operation overvoltage wave front time is longer, usually more than 1000 μs, and the long wave front impulse discharge voltage of the equal distance air gap is significantly higher than the standard operation impulse discharge voltage Improve, the present invention adopts long wave front time operating wave for wire-tower air gap operation...

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Abstract

The present invention discloses an ultra high voltage transmission line air gap rain flash test device and method. The device comprises a test line, a test tower, a pressure device, a rainwater spraying device and a rainfall control device, the rainwater spraying device comprises a spraying rack, a mounting plate, a plurality of nozzles, a speed regulation water pump and a spraying angle control motor, the rainfall control device comprises a rainfall sensor, an A/D conversion module and a signal processing module, the rainfall sensor is connected with a signal processing module through the A/D conversion module, and the signal processing module is connected with the speed regulation water pump and the spraying angle control motor; and in the condition that the actual rainfall simulated by the test device reaches the standard rainfall, multi-time impact voltage is applied to the test line, and the air gap rain flash voltage is calculated according to the discharging condition of the air gap. The ultra high voltage transmission line air gap rain flash test device and method can automatically perform artificial rainfall and regulate the spraying angle and water volume in real time to simulate different rainfall conditions and improve the accuracy of the rain flash test result.

Description

technical field [0001] The invention relates to the technical field of safe operation of high-voltage transmission lines, in particular to an air gap rain flash test device and method for UHV transmission lines. Background technique [0002] In the past ten years, my country's national economy has continued to develop at a high speed, prompting the electric power industry to enter a new period of development. In order to ensure the safe, reliable, efficient and environmentally friendly operation of high-voltage and ultra-high-voltage power grids, it is imminent to comprehensively improve the external insulation level of transmission lines in the face of extreme weather such as heavy rainfall. Therefore, it is imperative to design a set of convenient equipment for carrying out the artificial wire air gap rain flash test. The existing rain flash tests mainly include "rod-plate" short air gap rain flash test of 0.1m ~ 0.6m, rain flash test of various insulators under various d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1245G01R31/1272Y02A90/10
Inventor 李清卢明杨晓辉任欢吕中宾胡建林刘泽辉寇晓适孟维魏建林石璧蒋兴良张希希张宇鹏赵磊付刚
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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