Lead potential measurement method, device and system

Abstract

The invention discloses a lead potential measurement method. The lead potential measurement method is characterized in that a first three-dimensional electric field sensor and a second three-dimensional electric field sensor are disposed in advance in a preset range around a to-be-tested lead, that lines where the two-dimensional electric field sensors are located are not parallel to the to-be-tested lead is guaranteed, and a potential value of the to-be-tested lead is calculated based on the first electric field intensity measured by the first three-dimensional electric field sensor, the position information of the first three-dimensional electric field sensor, the second electric field intensity measured by the second three-dimensional electric field sensor and the position information of the second three-dimensional electric field sensor. The method is advantaged in that the two three-dimensional electric field sensors are utilized, compared with a voltage transformer, a measurementdevice is lighter, access with a tested line is not needed, influence of the tested line is reduced to the maximum degree, compared with one electric field sensor, requirements for the test positionare greatly reduced, measurement difficulty is reduced through utilizing two angles, and measurement accuracy is improved. The invention further provides a lead potential measurement device and system. The advantages are further achieved.

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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