储能系统平抑间歇性能源功率波动的控制策略研究

Study on the Control Strategy for Balancing Fluctuant Power of Intermittent Energy Based on Energy Storage

风光发电系统的随机性和间歇性特点将会对风光大规模并网造成不利影响。针对这一问题,提出了一种采用储能系统平抑风光输出功率波动的控制方法。建立了光伏发电单元、风机发电单元以及储能单元的数学模型。给出了风光储并网发电系统的最大功率跟踪控制和平抑控制策略,并且对控制原理和过程进行了详细分析。最终,通过仿真软件搭建了风光储并网发电系统的仿真平台,分别对加入储能平抑算法前后两种情况进行了仿真研究,仿真结果表明采用本文提出的平抑控制策略能够有效的减小输出功率的振荡幅度,提高系统稳定性。

The output power of wind and photovoltaic generation system is random and intermittent,and large scale integrated access will have adverse effects on the power grid. In order to solve this problem,a control method based on energy storage system is proposed for balancing fluctuant output power of wind and solar system.The mathematical model of photovoltaic power generation unit,wind power generation unit and energy storage unit is established. The maximum power tracking（MPPT） control and power fluctuant Smoothing control strategy are given for wind-photovoltaic-storage power generation system,and the control principle and process are analyzed in detail. Eventually, the simulation platform of wind-photovoltaic-storage power generation system is built by simulation software,and the simulation research is carried out for adding energy storage and without energy storage respectively. The simulation results show that the proposed control strategy can effectively reduce the amplitude of output power and improve the system stability.