METHOD FOR DETECTING ASYNCHRONOUS POWER TRANSMISSION MODE Russian patent published in 1995 - IPC

FIELD: automatic control. SUBSTANCE: current amplitude ripple cycles in power transmission are recorded, their period and quantity are checked, minimum and maximum values of current amplitude in each cycle are measured, amplitude values of I_m are measured in all cycles for each half-cycle starting from maximum value of I_o, increments of ΔI_m are calculated as difference between preceding and next values, ratio of minimum and maximum current amplitude values to its maximum value during initial cycle is found. Reference value is shaped as sum of desired fractions of α₁ и α₂ of I_o and as I_o and I_m-1 difference, asynchronous mode is recorded if ΔI_m does not exceed reference value in each ripple cycle. EFFECT: facilitated procedure. 3 dwg