Universal Switch for Measuring the Resistance of the Grounding Device Supports of the 110 kV Overhead Power Line
Corresponding email: maksimka-borodin@yandex.ru
Published at : 21 Dec 2020
Volume : IJtech
Vol 11, No 8 (2020)
DOI : https://doi.org/10.14716/ijtech.v11i8.4534
Borodin, M., Belikov, R.P., Lysenko, N.E., Shabanov, I.V., Safin, A.R., 2020. Universal Switch for Measuring of the Resistance of the Grounding Device of the Supports of the 110 kv Overhead Power Line. International Journal of Technology. Volume 11(8), pp. 1528-1536
| M.V. Borodin | Federal State Budgetary Educational Institution of Higher Education Oryol State Agrarian University, Oryol, General Rodin Street, 69. 302019, Russia |
| R.P. Belikov | Federal State Budgetary Educational Institution of Higher Education Oryol State Agrarian University, Oryol, General Rodin Street, 69. 302019, Russia |
| N.E. Lysenko | Federal State Budgetary Educational Institution of Higher Education Oryol State Agrarian University, Oryol, General Rodin Street, 69. 302019, Russia |
| I.V. Shabanov | The branch PJSC “MRSK Centre” – “Oryolenergo” (PAO “MRSK Centre” – “Oryolenergo”), Oryol, Mira Sq., 2, 302030, Russia |
| A.R. Safin | Kazan State Power Engineering University, Kazan, Krasnoselskaya Street, 5, 1420066, Russia |
At
present the devices that use the pulse method to measure the resistance of a
grounding device (GD) of the 110 kV overhead power line
(OHL) supports have the following disadvantage: to do the measurements,
various circuits must be assembled. This takes about 30%
of the total measurement time. Moreover, there is no mathematical model to
describe the process of measuring the resistance of the protective device for
the 110 kV OHL supports. This is a gap in the studies aimed at increasing the
efficiency of measuring the resistance of that
protective device. We have developed a universal switch to reduce the time for
measuring the resistance of the GD of the 110 kV OHL supports using the pulse
method. The simplicity of the design of this universal switch means it can be
assembled in the structural units of measurement companies. In addition, the
developed universal switch can work with different measuring devices. The tests
of the developed universal switch show its efficiency, and they indicate the
prospects for developing it. The efficiency of the developed universal switch
was determined using the developed mathematical model. When employees use the
developed universal switch to measure the resistance of the PD of the 110 kV
OHL supports by the pulse method, and if it is impossible or inexpedient to
disconnect the lightning protection cable from the body of the support, it will
take about 86 minutes to perform these measurements. This is 28% less time than
if the measurements were performed without using this device.
Equipment list; Grounding device; Resistance measurement; Universal switch
According to several authors (Abdurrakhman et al., 2020; Astahov and Belikov, 2013; Kolobov et al., 2016; Nazir et al., 2016; Nizhevskij and Nizhevskij, 2016) the devices to measure the resistance of the PD differ in their field of application, measurement ranges, circuits, noise immunity, and frequency of the measuring current, and the operation includes various measurement methods. If it is impossible or inexpedient to disconnect the lightning protection cable from the body of the support to measure the resistance of the protective device of the 110 kV OHL supports, you can use the pulse method developed at the Moscow Power Engineering Institute (MPEI) and the method developed at the Siberian Research Institute of Power Engineering (SibNIIE).
The method developed at SibNIIE is widely used in the power grid complex of Russia. It is based on using two potential and two current electrodes. Serial grounding testers, and the instruments from geophysical sets as well, can be used as measuring instruments when implementing the pulse method developed at SibNIIE.
Other authors (Dzhura and Selivanov, 2013; Rodrigues and Visacro, 2014;
Harid et al., 2015; Kolobov et al., 2017; Junior et al., 2011) focus on
the problem of increasing the accuracy and reliability of resistance
measurements of the PD of OHL supports using the pulse method, but these
authors do not consider the issue of reducing the number of different
measurement circuits.
However, the personnel engaged
in measurements spend much time assembling the circuits, which is a great
disadvantage of that method.
At present
more than 20 companies around the world offer modern measuring devices, which
use the pulse method to measure the resistance of the protective devices of the
110 kV OHL supports, but they have the following disadvantages: to use these
devices, personnel must assemble various circuits to perform the measurements.
This takes about 30% of the total measurement time.
This situation
takes place because there is no universal device that allows switching between
measurement circuits. Therefore, an urgent task should be to develop a device
that allows switching between circuits to measure the resistance of the 110 kV
OHL supports. However, the organizations that measure the resistance of the PD
of the 110 kV OHP supports already have devices that allow them to perform the
measurements. Therefore, it is necessary to develop a universal device that
could fit different measuring devices.
We conducted
a patent analysis, reviewed the existing ready-made and developed devices and
complexes that measure the resistance of grounding devices, searched through
scientific journals and on the Internet for devices that reduce the assembly
time of various circuits. We found no result, as there are no such devices that
allow switching between circuits.
Also, in the
literature there are no data on the number of times each year that the
resistance of 110 kV OHL supports must be measured using the pulse method if it
is impossible or inexpedient to disconnect the lightning protection cable from
the body of the support.
The study of such data would allow scientists
and specialists to predict the technical condition of 110 kV OHL supports and
justify the use of new devices to make the measurement of 110 kV OHL more
efficient and economical.
Studying the
writings (Gracheva and Naumov, 2019; Koliushko and
Rudenko, 2019; Kosyakov et al., 2019; Vinogradov et al., 2020), we
discovered that there is no mathematical model to describe the process of
measuring the resistance of the protective device of the 110 kV OHL supports.
This is a gap in the research that aims to increase the efficiency of
resistance measuring of those protective devices.
Therefore, the process of measuring the resistance of the 110 kV OHL
supports when using the pulse method must be optimized by developing a
universal switching device, while its efficiency must be determined by a
mathematical model that describes the time process of measuring.
To correct the disadvantages
described in the “Method” section, we analyzed a number of ways to measure the
resistance of the GD of 110 kV OHL supports, and we developed a mathematical
model to describe the measurement process. In that section, we also show how
the developed universal switch reduces the time needed to measure GD resistance
of 110 kV OHL supports when using the pulse method if it
is impossible or inexpedient to disconnect the lightning protection cable from the body of the support
(hereafter “without disconnecting the lightning protection cable from the
support”). We submit the results of the tests of the proposed universal
switch in Section 3, “Results and Discussion” Then we make a conclusion about the results of the study in Section 4, “Conclusions”.
The ability to measure the
grounding resistance of the 110 kV OHL supports quickly and according to high
quality standards without disconnecting the lightning protection cable enables
us to consider the developed universal switch as an important, useful, and highly
reliable technical improvement.
Using the device
described in this article will allow companies that measure resistance to
reduce the time needed to measure the resistance of the 110 kV OHL supports
using the pulse method if it is impossible or inexpedient to disconnect the
lightning protection cable from the body. This will allow them to perform more
measurements and reduce their operating costs.
The tests of the developed universal switch show its effectiveness, and they indicate the prospects of this development.
The simplicity of the design of the universal switch allows it to be assembled in the structural divisions of measurement companies. The assembly can be performed by personnel with less qualifications than those who conduct the measurements. The electrical devices needed to assemble the universal switch are freely available, and the developed universal switch can work with different measuring devices.
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