METHOD FOR CONTROLLING AUTONOMOUS ASYNCHRONOUS GENERATOR Russian patent published in 2021 - IPC H02P9/44 H02P9/48 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering; it can be used for power supply of autonomous objects that require regulation of the frequency and amplitude of the supply voltage. A method for controlling an autonomous asynchronous generator with a gate frequency converter in a rotor circuit is proposed, which consists in influencing the frequency converter containing an adjustable rectifier and an inverter with a signal for the deviation of the output voltage of the generator. Based on the comparison of the set and actual output voltages of the generator, signals are generated for setting instantaneous values of sinusoidal three-phase voltages of the rotor winding using three-phase relay-hysteresis voltage regulators. In each relay-hysteresis voltage regulator, the deviation between the set and measured phase voltage signals is determined. The deviation is compared with the threshold level, exceeding which control signals are sent to control inputs of corresponding phases of the frequency converter. Key elements of the inverter are switched and the deviation between the set and measured phase voltage signals at the output of the inverter is reduced to a value less than the threshold level. The generator rotor is rotated with the constant set angular velocity, the required frequency of the rotor supply voltage is formed equal to the difference between the set angular velocity of the rotor multiplied by a coefficient equal to a number of pairs of generator poles and the set required frequency of the stator voltage. The required voltage at the input of the inverter is calculated, the voltage at the input of the inverter is measured, the difference between these values is determined, and a control signal of the adjustable rectifier of the frequency converter is formed.

EFFECT: regulating the output voltage of the generator, ensuring high-quality voltage at the output of the generator with the minimum level of harmonics.

1 cl, 1 dwg