In the process of suppressing rapid fluctuations in wind power,frequent charging and discharging of energy storage operations and excessively high discharge depths will affect the energy storage life.For this reason,a method was proposed to address the issue by coordinating load shedding wind power and energy storage to suppress wind power.The switching frequency and depth of energy storage charging and discharging was reduced by utilizing load shedding wind power output.A wind storage system model was established and a two-level model prediction control optimization method was used:the upper level control was based on wind power prediction data for rolling optimization,on the basis of meeting the fluctuation requirements of wind power grid connection,the objective function was to minimize the total output of energy storage and load shedding wind power,and the total power of energy storage and load shedding wind power was obtained through the model prediction control method;the lower level control took the minimum change rate of energy storage power and the maximum output capacity as the objective function,and allocates energy storage and load shedding wind power output through the model prediction control method.Finally,a simulation research was conducted in a certain wind farm.The results indicate that the proposed control strategy effectively improves the energy storage life and output capacity.
关键词
风储系统/减载控制/模型预测控制/风电功率波动/功率平抑
Key words
wind storage system/load shedding control/model prediction control/wind power fluctuation/power suppression
维普
万方数据