Algorithm of the automatic synchronizer operation

When connecting powerful synchronous electric machines (SM) to the power system uses automatic synchronizers with constant lead time. It is necessary to improve their accuracy and performance for the success of synchronization on the technological requirements of production. METHODS. For SM change the angle of the rotor is determined in the three phases of the synchronized voltages. This allows to increase the number of measurements per unit of time. The least-squares method is used for extrapolating the function values at the interval forecast. REZULTS. The proposed algorithm for automatic synchronizer uses to predict the set of values of the functions change the angle of the rotor. This distinguishes it from the known algorithms, where the forecast is based on the three rotor angle values determined over the same time interval. This property improves the accuracy, reduces the time interval determine the forecast considers possible change of the acceleration slip angle of the rotor. Using the least-squares method allows to abandon the traditional derivative calculation of the angle of the rotor, which is associated with increased interference. In addition, this method characteristic filter properties. CONCLUSIONS. The developed algorithm allows to quickly define the time of synchronization and improves the conditions of the SM by keeping dynamic stability.