Developing Directional Overcurrent Relay Without Voltage Input

Abstract

With the rapidly increasing population and industrialization, the demand for electrical energy is constantly rising. This situation makes it inevitable to adopt new and innovative approaches in the production and distribution of electrical energy. In order to reduce dependence on traditional fossil fuel sources and minimize environmental impacts, there is a growing demand for renewable energy sources. In this context, electricity generated from renewable energy sources such as wind, solar, and hydroelectric power is becoming increasingly important. However, the use of these renewable energy sources poses some challenges in electricity transmission and distribution systems. Particularly, the uncontrolled power flow in power distribution, in addition to traditional energy transmission networks, can hinder the efficient and safe operation of integrated renewable energy sources in electrical systems. At this point, Directional Overcurrent Relays offer an effective solution to enhance safety and efficiency in electrical systems. Directional overcurrent relays detect the direction of overcurrent in electrical systems, ensuring maximum power transfer even in fault conditions, and play a significant role in the integration of renewable energy sources into the system, thereby enhancing its stability and reliability. In this study, a prototype of a Voltage Transformerless Directional Overcurrent Relay, which brings a new perspective to Directional Overcurrent Relays, has been developed, tested in fault conditions, and the results have been shared. Additionally, recommendations will beprovided for the wider implementation of Voltage Transformerless Directional Overcurrent Relays in existing electrical transmission and distribution systems.