THREE PHASE autonomous inverter current with management of voltage unbalance in the output network

摘要

The invention relates to the field of converter devices and can be used to supply three-phase AC networks of limited power control and output voltage asymmetry when powered consumer requiring stable voltage. The objective of the claimed utility model is to obtain a symmetrical output voltage of the autonomous inverter while reducing the cost of equipment and its energy consumption. This object is achieved by connecting to the output current of the inverter-controlled microprocessor control system, voltage sensors and associated analog-to-digital converters, the outputs of which are connected to the microprocessor control system of the inverter. The microprocessor control system is programmed to change the phase angle of the inverter thyristor switching, wherein an amount of change of angles defined by the gradient or coordinate descent through successive test changes each of the angles, whereby the system is ensured minimizing unbalance of the inverter output voltages.