A Method for Measuring Ground Potential Rise of Converter Station

A technology of ground potential rise and converter stations, which is applied in the direction of measuring current/voltage, measuring electrical variables, measuring devices, etc., can solve problems such as unreliable measurement results and difficult voltage electrode layout, and achieve small measurement errors and ground potential rise Accurate and reliable results

Active Publication Date: 2018-05-04
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the embodiment of the present invention, a method for measuring the ground potential rise of the converter station is provided to solve the problems in the prior art that the arrangement of the voltage poles is difficult and the measurement results are unreliable

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  • A Method for Measuring Ground Potential Rise of Converter Station
  • A Method for Measuring Ground Potential Rise of Converter Station
  • A Method for Measuring Ground Potential Rise of Converter Station

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Embodiment Construction

[0030] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] Aiming at the problem of difficult arrangement of voltage electrodes and unreliable measurement results in the prior art, the embodiment of the present invention directly uses the ground electrode lead 4 of the converter station 1 as the voltage electrode, the ground electrode lead 4 is tens of kilometers long and the ground elect...

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Abstract

The embodiment of the invention discloses a method for measuring converter station potential rising on earth, and the method comprises the steps of reading a background environment voltage waveform of a voltage transformer; selecting a corresponding frequency value as an object frequency based on test types; conducting a test of the corresponding type; reading the changed voltage waveform of a relative background environment voltage waveform of the voltage transformer; extracting an object frequency component of the changed voltage waveform to obtain a changed voltage waveform in the object frequency component; extracting a stable state portion of the changed voltage waveform in the object frequency component; and reading an effective value of the voltage waveform of the stable state portion as the potential rising on earth of the converter station. According to the method for measuring converter station potential rising on earth, no wiring is needed; the converter station potential rising on earth can be measured with existing earth electrode lead wire and an installed voltage transformer, therefore, time and labor are saved, and security is provided.

Description

technical field [0001] The invention relates to the technical field of high-voltage power grids, in particular to a method for measuring the ground potential rise of a converter station. Background technique [0002] A converter station refers to a station established in a high-voltage direct current transmission system to complete the conversion of alternating current to direct current or direct current to alternating current, and to meet the requirements of the power system for safety, stability and power quality. figure 1 It is a schematic diagram of the structure of the converter station in the related technology, such as figure 1 As shown, the two sides of the converter station 1 are respectively provided with an AC line 2 and a DC line 3 , and a ground electrode lead 4 is also provided on one side of the DC line 3 . The converter station 1 is also equipped with a valve hall of the converter station and a grounding grid 6. The converter station 1 is used for conversion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/00
Inventor 马御棠黄曹炜周仿荣于虹王科张波何金良丁薇
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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