METHOD FOR CONTROLLING GRID VOLTAGE INVERTER AS PART OF DISTRIBUTED GENERATION SOURCE Russian patent published in 2025 - IPC H02M3/38 H02M7/219 H02J3/24 

FIELD: conversion equipment.

SUBSTANCE: invention relates to conversion equipment and can be used for control of grid voltage inverter as a part of distributed generation source. Method to control a grid inverter is based on continuous recording of instantaneous values of output currents and voltages at an inverter output, their conversion into a Cartesian system of coordinates, further control of output currents and determination of a turning angle of the coordinate system by solving the equation of motion of a virtual synchronous machine. Unbalance of powers in the virtual synchronous machine is determined from difference of the specified and current output active power, and also the damping force stipulated by difference of rotation frequency of the virtual rotor and frequency of the mains voltage fixed by phase-locked loop. Specified values of currents are determined on the basis of output power of the inverter, which is required to maintain amplitude and frequency of the mains voltage, as well as additional output active and reactive power in case there is reserve of inverter power.

EFFECT: exclusion of mutual influence of output active and reactive power, and also improvement of quality of control and harmonic composition of output electric power of network voltage inverter built on the basis of virtual synchronous machine.

3 cl, 2 dwg