SYNCHRONIZER WITH CONSTANT ADVANCE ANGLE Russian patent published in 1994 - IPC

FIELD: electric power engineering. SUBSTANCE: angles of phase shift between phase A of network and five voltages of generator - voltages of generator phases A_г, B_г и C_г and specially formed voltages proportional to advance angles δ′ и δ″ correspondingly at f_г<f_с и f_г>f_с are measured. Tuning unit determines moment of presence of vector A_c in region between vector and between vectors B_г и C₁ to form signal for switching on of generator. Counter counts number of hits of vector A_с to region between B_г и C_г and with preset number of pulses generates signal across first output which is signal for switching on of generator. If difference of frequencies is insufficient and there appears threat of "hanging" of generator, counter is overfilled and signal will appear across its second output which forms signal "add frequency" of generator. EFFECT: enhanced authenticity of control. 3 dwg