Verifying the indication method for high-resistance earth faults implemented in centralized protection system

The paper presents verifying test results of the primary substation level centralized functionality in laboratory. The attention is concentrated to verifying the indication method for high-resistance phase-to-earth faults in neutral isolated and compensated networks. The applied method is based on the studies and results carried out in TUT. For properly testing the test environment needed to be set up for centralized functionality. This environment was set up in TUT and it utilizes the Real Time Digital Simulator (RTDS®). The indication method for high-resistance earth faults has been implemented as centralized in order to test the new technology. It utilizes new possibilities of the centralized protection system. The essential method in this study was RTDS simulations of centralized protection system.