Діагностичне забезпечення процесу пошуку пошкоджень в повітряних лініях електропередачі напругою 6-35 кВ

Abstract

The paper contains solutions of scientific and practical issues on the increasing of reliability, safety and efficiency of power supply systems usage by means of airlines of 6-35 kV voltage. Thoroughness of the solution consists in the automation of the damage detection process and accuracy increasing based on the usage of static and dynamic characteristics combination in the normal and uninterrupted power supply modes. Static and dynamic characteristics of emergency mode were researched and the existing damage detection methods and devices were analyzed. Hence, were suggested more accurate methods of calculation of power supply airlines primary parameters and electrical load of certain substations 6-10/0,4 kV. Was developed a distance method of phase-to-phase damage detection in the power supply airlines of 6-35 kV voltage taking into account their inhomogeneity and structural branching . Also was developed a distance method of the ground one-phase damage detection regarding the constructive inhomogeneity and structural branching of airlines. Due to this method damage detection can be defined even in the conditions of a significant transition resistance. Then was worked up and practically implemented a program of a damaged section detection based on the method of a network consecutive division. The program provides a conventional algorithm of damage detection for different kinds of defects and control tools which are optimized via chosen criteria. A diagnostic system of troubleshooting or refusals was developed on the basis of electronic and microprocessor technique. A system of a phase-to-phase or ground damage detection with the chosen elemental base provides accuracy of 5% from the total length of airline for modeling lines with total main line length not exciding 20 km.