Voltage measurement method and device based on correction dielectric constant

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...

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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

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