Reactive power control method and device for new energy power plant

Abstract

The application discloses a kind of new energy electric field's reactive power control method and equipment, belong to new energy electric field field, can periodically according to the total reactive power and voltage value of last period of new energy electric field's grid-connected point and the total reactive power and voltage value of current period, determine grid impedance estimation value, then according to grid impedance estimation value, the grid impedance target value of last period is updated smoothly, determine the grid impedance target value of current period, then can according to the grid impedance target value of current period and the target voltage value of grid-connected point, determine the target reactive power of grid-connected point, finally control reactive power regulating device output target reactive power;Dynamic identification grid impedance can ensure grid impedance precision, to improve the precision of grid-connected point constant voltage control, and by the smooth updating of grid impedance target value, can prevent the oscillation of target reactive power caused by measurement noise, further ensure the precision of constant voltage control.

Images