SAMUR Reactor Control System for Efficient Capacitive Current Control

The SAMUR reactor control system is designed to determine possible capacitive currents during single-phase earth faults in 6 and 10 kV networks and to control the arc-suppression reactor RUOM by measuring the capacitive conductivity of the zero-sequence circuit of the network at non-industrial frequency. The SAMUR system is designed to automatically perform the following functions: recognition of the normal operation mode of the network and the earth fault mode; measurement of the network capacitance in the normal mode; inertia-free output to the capacitive current compensation mode when an earth fault occurs. It determines the expected value of the capacitive earth fault current and generates a command signal to the RUOM reactor converter. When an earth fault occurs, the reactor reduces the earth fault current to near zero. The setting process is fully automatic, and when faults occur, the reactor switches to the compensation mode without the involvement of operating personnel.