EMPIRICAL STUDIES OF EMERGENCY MODE PARAMETERS AND THEIR INTERACTION IN DETERMINING THE FAULT LOCATION IN NETWORKS WITH AN ISOLATED NEUTRAL VOLTAGE OF 6(10) - 35 KV

Abstract

"This article considers experimental confirmation of quantitative characteristics of factors influencing the determination of the distance to the fault location in networks with an isolated neutral voltage of 6(10)-35 kV. Experiments were carried out on a 35 kV overhead power line, the selection of optimality criteria was provided, a mathematical model, an experimental plan, a method for analyzing measurement data to damage detection devices were developed, response surfaces were constructed in the Mathcad 14 program in the Pro/ENGINEER package. According to the results of the experiment on the parameters of the emergency mode, it was found out that the largest influencing factor is the value of the transient resistance at the point of wire breakage of a non-metallic earth fault. It is proved that with a transient resistance above the value of 50 ohms, the distance to the damage site is almost impossible to determine with remote devices that register the parameters of the emergency mode. Recommendations for the development of a mathematical model with the production of logical operations on fuzzy sets of an adaptive neuro-fuzzy system are formulated. It is proposed to apply the mathematical model developed in the future as a basis for designing the element base of the device for determining the location of damage, working on the principle of artificial intelligence with an adaptive nature of measurements under changing external conditions. Key words: experiment, single-phase ground fault, fault location, overhead power line, isolated neutral, contact resistance, network isolation. "