SYNCHRONIZATION ALGORITHM FOR THREE-PHASE VOLTAGES OF AN AUTONOMOUS INVERTER AND A NETWORK
O. V. Nos
Novosibirsk State Technical University, prosp. K. Marksa 20, Novosibirsk, 630073
Keywords: синхронизация напряжений инвертора, контур фазовой автоподстройки, векторное управление двигателем переменного тока, synchronization of inverter voltages, phase-locked loop, vector control of AC motor
Abstract
A joint phase-locked loop for tuning the angular shifts (velocity) and Euclidean norm of three-phase voltages of an autonomous inverter to the same network parameters is designed, which can be used, in particular, to equalize the potentials of two parallel-connected power sources at the fundamental harmonic at the moments of switching the stator windings of an asynchronous AC motor from a converter to a centralized power-supply system and back. Technical implementation of the developed synchronization algorithm will significantly reduce the inductance of the equalization reactor and exclude emergency operation modes in power circuits of the electric drive.
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