На основе анализа статистической базы данных по зондированию грунта и диагностики состояния заземляющего
устройства сформулированы требования и созданы рекомендации относительно выбора приборов для проведения
вертикального электрического зондирования в зависимости от класса напряжения энергообъекта и доверительной
вероятности. Доказана эффективность выбора приборов на основе оптимальных требований.
На основі аналізу статистичної бази даних з зондування ґрунту та діагностики стану заземлювального пристрою
сформульовано вимоги та створено рекомендації щодо вибору приладів для проведення вертикального електричного
зондування в залежності від класу напруги енергооб’єкту та довірчої ймовірності. Доведена ефективність вибору приладів на основі оптимальних вимог.
urpose. Creation the scientific requirements for technical characteristics of equipment for vertical electrical sounding based on
the electrophysical characteristics of the soil of energy objects
with the different voltage classes. Methodology. In work used
statistical methods for the analysis database of results the soil
sounding and for receiving distribution of largest size of the
grounding system. To determine the required range of measurement and permissible value of circuit resistance applied the
mathematical description of the electromagnetic field to calculate
the apparent resistivity of the soil and the Wenner method of calculating the resistance of a vertical electrode. Also, in work used
elements of probability theory to creation the stochastic correlation between device parameters and characteristics object of the
research. Results. In the paper found that in the most severe cases
(when the depth of sounding is the three maximal diagonal of
grounding) at 99% energy objects in Ukraine the lower limit of
resistance measurement for the respective classes of voltage must
be no more than 1.3 milliohms to 35 kV, 0.6 mOhm to 110 kV, 0.5
milliohms to 150 kV, 0.1 mOhm for ≥ 220 kV. Also it proved that
the measurement equipment for vertical electrical sounding when
performing electromagnetic diagnostics of grounding system the
power facilities Ukraine with 35-750 kV voltage class for all possible values of soil resistivity should be with limit of measurement
from 0.1 mOhm to 7.2 kOhm and resistance measuring circuit to
66 kOhm. Originality.For the first time used a statistical approach to evaluate the optimal technical requirements for equipment the soils resistivity when performing diagnostics of grounding systems energy objects of Ukraine. The results obtained in this
work, establish the probabilistic dependence of the technical
characteristics of measuring equipment from the actual depth of
sounding in Wenners configuration (the distance between electrodes) and from the voltage class of object. Practical value. The
obtained results allow depending on the specific parameters of the
object optimally select the equipment. This technique allows you
to create a range of equipments with optimal cost and overall
dimensions depending on the region (considering to a significant
spread of values of soil resistivity) and on the voltage class of
investigated object
