METHOD FOR FREQUENCY ACTUATED RECLOSING OF LOAD Russian patent published in 2001 - IPC

FIELD: electrical engineering. SUBSTANCE: method proposed to prevent abnormal reduction of supply frequency in case of emergency active power drop involves setting of reclosure delay time for loads disconnected by automatic frequency actuated off-loading devices depending on how much was frequency reduced in this or that case and not as fixed value so as to reduce off-power intervals. System becomes adaptive to amount of emergency active-power unbalance. Frequency actuated automatic reclosing time settings are determined proceeding from current value of frequency according to specified algorithm. EFFECT: reduced damage to users caused by off-power intervals. 2 cl, 1 dwg