Patent ID: 9124140
Filing Date: 2015-09-01
Classification: H02J,H02P,Y02E

Abstract:
1. A method of controlling grid connection of energy sources comprising: providing an AC/DC/AC PWM frequency converter comprised of a machine-side self-commutated PWM converter, a DC-link, and a grid-side self-commutated PWM converter, wherein the machine-side self-commutated PWM converter is operably connected to an energy source and the grid-side self-commutated PWM converter is operably connected to an electrical grid and the DC-link interconnects the machine-side self-commutated PWM converter and the grid-side self-commutated PWM converter; providing a control system operably connected to the AC/DC/AC PWM frequency converter, wherein the control system is comprised of a nested current and voltage loop controller; providing a d-axis control current, i processing i comparing i smoothing the i generating an i providing a q-axis control current, i processing i comparing i smoothing the i generating an i