DEVICE FOR SYNCHRONOUS HIGH-SPEED AUTOMATIC SWITCHING-IN OF BACKUP POWER SUPPLY TO USING EQUIPMENT FOR SUBSTATIONS WITH MOTOR LOAD

摘要

The invention relates to emergency control devices of power systems, in particular, to automatic activation of backup power for substations with a motor load. The goal - povUi and. improvement of accuracy and speed. The inputs of the angle measurement unit between the vectors of monitored voltages 1 are connected to the operating and backup power sources. When the power is lost at one of the sections, the block 2 fixes the set angle value, which leads to the beginning of the countdown time of the backup switch on by the block 3 specifying the activation time of the backup switch. Memory unit 4 captures and remembers the current angle value. In accordance with this value, the output angle of the nonlinear unit 5 is processed, which corresponds to the time of switching on the backup switch at a given rate of change of the angle. Comparison unit 7 is triggered after the current angle value becomes less than the angle processed by the non-linear unit. At the same time, the logical element AND 8 turns off. 2 Il. S CL 8. bn / 1. 1ro