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Voltage measurement method and device based on correction dielectric constant

A dielectric constant and voltage measurement technology, applied in measuring devices, measuring current/voltage, measuring only voltage, etc., can solve problems such as large voltage measurement errors, lack of dielectric constant calibration means for D-dot sensors, and weather interference. Achieve the effect of reducing voltage measurement error and improving voltage measurement accuracy

Active Publication Date: 2022-05-13
CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, the on-site environment has great interference on the D-dot sensor, such as three-phase voltage interference and weather interference, which cause a large voltage measurement error. At present, there is no effective dielectric constant calibration method for the D-dot sensor

Method used

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  • Voltage measurement method and device based on correction dielectric constant
  • Voltage measurement method and device based on correction dielectric constant
  • Voltage measurement method and device based on correction dielectric constant

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

[0058] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to display data, analysis data, etc.) involved in this application are authorized by the user Or information and data that have been fully authorized by all parties; correspondingly, this application also provides a corresponding user authorization entry for users to choose to authorize or choose to refuse.

[0059] In one embodiment, as figure 1 As shown in the figure, a voltage measurement ...

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Abstract

The invention relates to a correction dielectric constant-based voltage measurement method and device, computer equipment and a storage medium. The method comprises the steps of constructing a three-phase line for a three-phase power line scene, correcting an electric field coupling model of a harmonic source and a sensor, and determining model parameters corresponding to the electric field coupling model; displacement current flowing into a sensor measurement loop is obtained, and the corresponding relation between sensor output voltage and field source conductor potential is established; performing spectral decomposition on the output voltage of the sensor to obtain a first frequency point and a second frequency point, and correcting the dielectric constant by adopting the first frequency point to obtain a corrected dielectric constant; and on the basis of the second frequency point, according to the corrected dielectric constant and the corresponding relationship between the sensor output voltage and the field source conductor potential, determining the ground potential corresponding to each field source conductor, and obtaining voltage measurement data by adopting the ground potential corresponding to each field source conductor. By adopting the method, the voltage measurement error can be reduced, and the voltage measurement precision is improved.

Description

technical field [0001] The present application relates to the technical field of power system voltage measurement, in particular to a voltage measurement method, device, computer equipment, and storage medium based on corrected dielectric constant. Background technique [0002] With the large-scale development of multi-regional Internet projects and the large-scale grid connection of various distributed power sources, a super-large-scale complex power grid has been formed, which requires more monitoring data of electrical quantity of the power system to ensure the safe operation and scheduling of the power grid. For the deployment of massive electrical data monitoring devices in power systems, traditional electromagnetic voltage transformers are difficult to be widely deployed in power systems due to their large size, high cost, and inconvenient installation. It is very urgent to adapt to the field environment. [0003] Non-contact voltage measurement is a voltage measureme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G06F17/14G06F17/16G06F30/367
CPCG01R19/0084G06F17/14G06F17/16G06F30/367Y02E60/00
Inventor 李鹏张佳明骆柏锋李立浧田兵尹旭吕前程刘仲王志明陈仁泽徐振恒韦杰林跃欢聂少雄谭则杰林秉章樊小鹏孙宏棣林力
Owner CHINA SOUTHERN POWER GRID DIGITAL GRID RES INST CO LTD
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