METHOD FOR IMPROVING PHOTOVOLTAIC PRIMARY FREQUENCY MODULATION DROOP CONTROL PERFORMANCE

摘要

A method for improving photovoltaic primary frequency modulation droop control performance, comprising the steps: 1) establishing a photovoltaic grid-connected inverter droop control equation simulating droop external characteristics of a synchronous generator in a conventional generator set; 2) setting a primary frequency modulation response action threshold value of a photovoltaic power station; 3) combining steps 1) and 2) to obtain a primary frequency modulation droop control expression of the grid-connected inverter of the photovoltaic power station having a dead zone; 4) establishing an adaptive function using a droop control coefficient m, output active power, and a target frequency to obtain an adaptive droop coefficient expression; and 5) combining steps 4) and 2) to obtain a primary frequency modulation adaptive droop control expression of the grid-connected inverter of the photovoltaic power station, and adjusting the droop coefficient in real time to achieve the purpose of improving the photovoltaic primary frequency modulation droop control performance. Adaptive droop control is applied in photovoltaic primary frequency modulation droop control, and the droop coefficient can be adjusted in real time according to the target frequency.