POWER SUPPLY Russian patent published in 2002 - IPC

FIELD: no-break emergency and stand-by power supply to important users. SUBSTANCE: power supply designed to ensure no-break power supply to important users in case of inadmissible voltage drop due to emergency situations such as short circuits on power center side has minimum voltage sensor, current sensor, power direction relay, control device, and controlled current- limiting reactor. Control device functions to check voltage level across buses of dual-transformer substation by means of voltage sensor and also to check short-circuit current in power transmission line by means of current sensor; depending on these values device shapes signal for operation of one of controlled reactors so that with power flow direction from substation transformer buses reactor impedance is maximal and when it is to its buses, reactor impedance is minimal. EFFECT: enhanced reliability of power supply in emergency situations. 5 dwg