Method, device and system for measuring wire potential

Abstract

The invention discloses a method for measuring the electric potential of a wire. The first three-dimensional electric field sensor and the second three-dimensional electric field sensor are arranged in the preset range around the wire to be measured in advance, and the straight line where the two three-dimensional electric field sensors are located is in line with the wire to be measured. The wires are not parallel, according to the first electric field strength measured by the first three-dimensional electric field sensor, the position information of the first three-dimensional electric field sensor, the second electric field strength measured by the second three-dimensional electric field sensor and the position information of the second three-dimensional electric field sensor, namely The potential value of the wire to be tested can be calculated. Two three-dimensional electric field sensors are used, which are lighter than voltage transformers and do not need to be connected to the tested line, and the impact on the tested line is minimized. Compared with one electric field sensor, the requirements for the test position are greatly reduced. Therefore, the measurement difficulty is reduced from two angles, and the measurement accuracy is improved. The invention also provides a wire potential measuring device and a measuring system, which have the above beneficial effects.

Description

technical field [0001] The invention relates to the technical field of electric power detection, in particular to a measuring method, a measuring device and a measuring system for a wire potential. Background technique [0002] As an essential input variable for the power system to achieve optimal operation, control, protection and other functions, the conductor potential is one of the common items that require large-scale testing. Much research has been done on the problem of measuring line potentials. [0003] Line potential measurement methods in the prior art include access measurement methods using voltage transformers, voltage sensors based on the Hall effect principle, or optical fiber voltage sensors, and non-access measurement methods using electric field sensors based on MEMS technology. However, the former needs to be connected to the line under test, which is inconvenient to install and has high insulation requirements, and the voltage transformer carries an iro...

AI Technical Summary

Problems solved by technology

However, the former needs to be connected to the line under test, which is inconvenient to install and has high insulation requirements, and the voltage transformer carries an iron core or a magnetic core, which is relatively heavy; although the latter does not need to be connected to the line under test and has no iron core or magnetic core, but in The relative position of the electric field sensor and the measured wire must be fixed during measurement, which requires high installation requirements and is not practical

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