ELECTRIC POWER DISTRIBUTION NETWORK PROTECTION SYSTEM

Abstract

The safety of the electrical network is concerned both with the physical integrity of the components of the electrical system and the well-being of those who operate in it or in its surroundings. Electricity distribution is vulnerable to a wide variety of failure modes. Electricity generated by atmospheric discharges such as lightning, which can cause damage to electrical infrastructure. To be efficient, a protection system needs to be properly scaled, safe, reliable, fast, outbreak-sensitive, and coordinated in its selectivity. In this sense, the objective was to show two types of protection tools known as network protectors that were designed computationally. For this, in the electricity distribution networks, network protectors were installed to identify the presence of reverse power flow in the distribution transformers. These network configurations provide great stability in power supply due to the use of at least two main power outages. A short circuit in the primary feeders manifests itself as a current inversion in the transformers of this topology. The reverse flow of the fault originates from the contributions of the secondary network of the other major feeds. Together with the overcurrent protection of the primary feeders, the network protector helps to completely isolate the short circuit by isolating the transformers connected to the feeder missing from their connections to the secondary network. It was concluded that the modeled network protectors fulfill their function adequately, the growth of the dispersed generation can lead to inadequate actions on the part of the network protectors.