1results about How to "Fast steady state" patented technology

The application provides a grid-connected inverter extreme working condition adaptive power angle compensation stable control method and system, calculates active power and reactive power output by the grid-connected inverter; compares the grid voltage amplitude, when the grid voltage amplitude is greater than the threshold value, virtual synchronous generator control is adopted, a power ring generates an internal potential signal and a phase signal, a modulation signal is generated through a virtual impedance and a voltage and current double closed loop part, otherwise, a fault ride-through control is started, an active ring is frozen, the power reference value of the active ring is replaced by the active power output by the grid-connected inverter, and adaptive power angle compensation control is put into the active ring; after the grid voltage returns to the normal range, the fault ride-through mode is kept until the system enters the steady state, the adaptive power angle compensation stable control is exited, the active ring is restarted, and the virtual synchronous generator control mode is entered. The application ensures that the VSG can still be grid-connected during the fault period, and fully plays the active power output capacity of the VSG.