JUSTIFICATION FOR THE USE OF NEUTRAL GROUNDING IN A 20 kV DISTRIBUTION NETWORK

Abstract

This article discusses the problem of selecting the neutral grounding mode in 20 kV electrical networks. Ensuring reliable and safe operation of medium-voltage power systems is one of the key challenges in modern power engineering. Therefore, special attention is given to the selection of an optimal neutral grounding method that can improve the operational reliability and stability of electrical networks. The study focuses on the application of neutral grounding through a resistor in electrical networks of this voltage level.

The use of resistive grounding of the neutral allows increasing the reliability of the electrical network and simplifies the detection of faulty lines. In particular, in the case of a single-phase short circuit, this grounding scheme enables automatic identification and isolation of the damaged section of the network. In addition, the use of a grounding resistor helps reduce overvoltage levels in the electrical system, which contributes to improving the safety and durability of electrical equipment.

The article also examines the possibility of adjusting the resistance value in order to maintain the required overvoltage coefficient during various operating conditions of the network, including network interruptions and switching processes. Increasing the resistance value allows reducing the current of a single-phase short circuit, thereby minimizing the risk of emergency situations and equipment damage.

The results of the study indicate that the application of resistive neutral grounding in 20 kV electrical networks is an effective technical solution for improving the reliability, safety, and operational stability of modern power supply systems.