Relay protection and automatic device of a junction of a power network with measuring elements using optical transmission channels with frequency coding

摘要

Relay protection and automation device of the junction of an electricity network, characterized in that it comprises: - optical pulse generators, the frequency of which depends on the size of the instantaneous values of the voltages, currents or the status of the switching devices in the power network, - optical transmission channels through which the impulses are transmitted to the optical ports of a microprocessor-controlled arithmetic unit, - A microprocessor-controlled arithmetic unit that converts the pulse frequencies into instantaneous values of parameters of the power grid and generates the pulses of the specified frequency according to the specified algorithm in order to send them over the transmission channels to the switching elements of the power grid, which change their status depending on the frequency of the change received pulses.