METHOD OF CONTROLLING THE EXCITATION CURRENT OF THE SYNCHRONOUS MOTOR IN POST-ACCIDENT PROCESSES OF THE ENERGY SYSTEM Russian patent published in 2018 - IPC H02H7/08 H02P25/22 H02P1/46 H02P9/14 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and can be used in automatic control systems for the excitation of synchronous motors. In the method for controlling the excitation current of the synchronous motor in the post-accident processes of the power system, the value cosϕ of the motor and the current value of its load angle are measured, cosϕ is maintained at the level of 1.0 by changing the setting value of the current control loop setting to the corresponding side by the deviation of the stator circuit voltage, carried out according to the proportional differential law, minimum and maximum values of the operating range of the motor load angle are specified, when an angle value is output from a predetermined range, the excitation current is stopped by a voltage deviation and the excitation current is controlled by the deviation of the load angle from a predetermined nominal value until the deviation value changes the sign, after which they again start to act on the excitation current by the voltage deviation of the stator circuit. In the post-accident processes of the power system, the current control is carried out by an auxiliary regulator of a gradual descent, built according to a subordinate control scheme with a voltage regulator, with a given speed and step, reducing the excitation current and controlling the maximum and minimum excitation current, cosϕ and load angles of the machine Θ, in the aggregate excluding over-regulation of the excitation current and, as a consequence, the occurrence of an asynchronous stroke.

EFFECT: occurrence of an asynchronous move is eliminated.

1 cl, 1 dwg