Extreme high voltage direct-current non-contact distance-measurement electricity-testing method
A UHV DC, non-contact technology, used in measuring devices, electrostatic field measurement, electromagnetic wave re-radiation, etc., can solve the problems of low accuracy and poor repeatability of electrical inspection results, and achieve high accuracy.
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[0024] There are different field strength values at different distances X below the DC transmission wire, and the alarm threshold Y of the electroscope is different according to the field strength value. Therefore, according to a certain voltage level, the value collected by the electroscope at a distance of x meters below the wire is compared with the alarm threshold value y Judging whether the DC transmission wire is charged or not, where x is a range of distance from the wire, and its size changes according to the change of voltage level (for example, x for ±500kV DC is 20m~25m, and the alarm threshold y is 1.8 (1.8 is more The value of y is different in different occasions and should be determined according to the specific situation)).
[0025] Electricity test process
[0026] 1. Select a suitable working point, try to minimize the number of live equipment around, and reduce the interference of other live equipment on the electroscope.
[0027] 2. Carry out self-inspec...
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