DEVELOPMENT OF A METHOD FOR DETERMINING THE LOCATION OF A SINGLE-PHASE GROUND FAULT OF AN OVERHEAD POWER LINE 6(10) kV VOLTAGE CONSIDERING CLIMATIC FACTORS

• Main Authors: Sergey V. Sidorov, Valery V. Sushkov, Ilya S. Sukhachev
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2020-02-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: overhead power line; single phase ground fault; modeling; climatic factors; soil resistivity
• Online Access: http://izvestiya.tpu.ru/archive/article/view/2486/2166

Research relevance. One of the main causes of high accidents and outages in distributed power supply systems of 6(10) kV oil well clusters is damage to overhead power lines due to single-phase ground faults. Widely conducted researches to determine the location of a single-phase ground fault have established a correlation between the determination accuracy and a large number of changing factors, such as operating mode parameters, overhead power line parameters, damage type, transition resistance, soil resistance, and taking their average values, regardless of changing climatic conditions. Rationing of technical means for determining the location of a single-phase ground fault according to instrumental errors without taking into account the methodological component defines the error in determining the location of the damage, reaching 30 %. Thus, the relevant research is aimed at determining the primary parameters of transmission lines and minimizing the methodological error in defining the location of damage to transmission lines considering climatic factors. The main aim of the research is to improve the accuracy of determining the location of a single-phase ground fault of a 6 (10) kV transmission line with developing a methodology that takes into account the influence of climatic factors. Research methods. The basic physical processes of propagation of an electromagnetic wave in a power line are taken into account. The main principles of the theory of electrical circuits and the electromagnetic field are used; MATLAB Simulink package algorithms. Research results. The authors have developed the algorithm that allows determining the distance from 6(10)/0,4 kV substations to the point of single-phase ground fault occurrence in distribution networks of oil well clusters taking into account climatic factors. A simulation model of a 10 kV distribution network supplying oil well clusters considering the dependence of the primary transmission line parameters on climatic factors and soil resistivity, was developed in MATLAB Simulink.