Analysis of Work of Frequency Relay with Application of Digital Testing System
Keywords
Abstract
We were given the task of automatically checking the characteristics of the digital frequency relay. To test and configure complex devices of relay protection and automation, which are digital frequency relays, there have been used special technical means using digital technology. Therefore, this problem is solved by creating algorithms to verify the characteristics of the operation of the typical and special characteristics of the digital frequency relay. On the basis of algorithms the specialized module of check of the frequency relay which became a subsystem of domestic digital test systems of check of devices of relay protection and automatic equipment “RZA-Tester”, “Relay-Tester” and “RTS-M” is created. The developed module allows to check almost all characteristics of the domestic digital frequency relay of the URCH-3M series in the modes of automatic frequency unloading, frequency automatic restart, automatic frequency unloading with blocking on speed of decrease in frequency, control of speed of decrease in frequency. The functional unit of the specialized module allows to check all the characteristics of the frequency relay in one cycle and significantly reduce its testing time. The frequency relay test module showed high efficiency at the stage of manufacturing the URCH-3M series frequency relay on the technological lines of the RELSIS research and production enterprise and during the adjustment of the frequency relay in the power systems of Ukraine.
