储能系统平抑风电功率波动及容量动态优化控制

Energy storage system suppresses wind power fluctuation and capacity dynamic optimization control

在高比例风电主导的可再生能源电力系统中,利用储能系统平抑风电并网功率波动,可提高风电在电网中的渗透率。为避免储能系统过度充放电,提出了储能系统SOC分区控制模型及控制方法。在此基础上,结合风功率预测信息,提出了风储协调动态优化控制策略,采用超前控制及滚动时域优化方法执行储能的动态控制,在控制允许的范围内提前进行充放电。通过实际风电场数据的仿真算例分析,验证了文章所提方法的优越性,在有效降低风电并网功率波动的同时,提高了储能容量的裕度、利用效率及使用寿命。

In a renewable energy power system dominated by a high proportion of wind power, the use of energy storage systems to stabilize wind power grid-connected power fluctuations can increase the penetration rate of wind power in the grid. In order to avoid excessive charging and discharging of the energy storage system, the SOC zone control model and control method of the energy storage system are proposed. on this basis, combined with the wind power prediction information, a wind-storage coordinated dynamic optimization control strategy is proposed, using advanced control and rolling time domain the optimization method executes dynamic control of energy storage,and performs charging and discharging in advance within the range allowed by the control. The simulation example analysis of actual wind farm data verifies the superiority of the method proposed in this paper. While effectively reducing the power fluctuation of wind power grid-connected, it also improves the margin of energy storage capacity, utilization efficiency and service life.