Effect of voltage harmonics on pulse repetition rate of partial discharges
Journal Title: Технологический аудит и резервы производства - Year 2018, Vol 2, Issue 1
Abstract
<p><em>The objects of the research are partial discharge processes simulated under the influence of non-sinusoidal voltage. In the context of studying the effect of voltage harmonics on partial discharges, the total harmonic distortion can only be used for rough estimation. The reason for this is that the total harmonic distortion does not take into account the phase angles of the individual voltage harmonic components. Under non-sinusoidal voltage with the total harmonic distortion of 10 % and above, the intensity of the partial discharges in the insulation increases. However, at lower values of the total harmonic distortion, the harmonics can also affect the characteristics of the partial discharges. To solve this problem, it is necessary to carry out a study, increasing the number of voltage harmonics taken into account. To do this, it is possible to use the known three-capacitive equivalent circuit for a dielectric with gas cavity, making appropriate changes to the voltage source.</em></p><p><em>The model was studied using voltage harmonic of the fundamental frequency together with voltage harmonics from the 2nd to the 30th order included. It was found that for the fixed amplitude the phase angle of the voltage harmonics has a decisive influence on the number of partial discharge pulses. In the presence of voltage harmonics, this number can be the same as under the influence of a pure sinusoidal voltage. It can also be 14.3 % less and 14.3 % or 28.6 % greater. In all cases, the value of total harmonic distortion remains the same. The possibility of using high-voltage reference inductive voltage transformers for voltage distortion measurements was studied experimentally. It was found that this is expedient for the region of the maximum value of the magnetic permeability of their magnetic cores, which corresponds to a range of 80–120 % of the transformer rated voltage.</em></p><p><em>Mobile laboratories for checking high-voltage transformers on-site with the addition of appropriate equipment can simultaneously be used to measure a number of power quality indices.</em></p>
Authors and Affiliations
Yevgeniy Trotsenko, Volodymyr Brzhezitsky, Olexandr Protsenko, Vadim Chumack, Yaroslav Haran
Keywords
Related Articles
- EP ID EP527357
- DOI 10.15587/2312-8372.2018.126626
- Views 121
- Downloads 0
Visualization of the pool fire action zones with using MapInfo GIS for the number of filling stations of the Odessa (Ukraine) residential district
<p><em>The object of research is a system of filling stations (traditional filling stations) of the traditional type within the Malinovsky district of Odessa (Ukraine). One of the most problematic places of functioning o...
Development of imitation model for selection of tug barge vessels for work on the line
<p><em>The object of research is the process of operation of TBV for route transport with a through form of traction and exchangeable form of coordination of the work of traction and tonnage at the points of departure an...
Financial services for enterprises: analysis of logistic nature and customer value attributes
<p><em>The object of research is the consumer perception of financial services, which can be used by enterprises to achieve their economic goals and form the landscape of today’s financial services market. The insufficie...
Development of reagents for protection of equipment of water supply systems from scale and corrosion
<p><em>The object of research is environmentally friendly water exchange systems in industry and utilities. At existing enterprises, in the process of modernizing water use systems, they often switch to the use of corros...
Increasing the accuracy of the non-contact temperature measurement in the case of energy audits of different objects
<p><em>The object of research is the process of thermal inspection of enclosing structures with the help of a thermal imager. One of the most problematic places of thermal imaging energy is the presence of a significant...