平抑风电功率波动的双配置混合储能系统控制策略

风电功率具有波动性,不利于电力系统正常运行,因此构建了由两组超级电容器和两组蓄电池组成的双配置混合储能系统,用以平抑波动。两组超级电容器根据实时荷电状态交替补偿高频正、负功率波动,分别处于充、放电状态;当任意一组达到荷电状态上限约束值或下限约束值,则同时切换两组超级电容器的充放电状态,保证其处于不同的工作状态。两组蓄电池采用同样的控制策略,用于补偿低频正、负功率波动。最后,对某风电场历史数据进行仿真分析,结果表明,该方案可有效提高储能装置利用效率,降低其容量配置;并且大幅度降低了储能装置充放电切换次数,提高了循环使用寿命。

Control Strategy of Dual Configuration Hybrid Energy Storage System for Smoothing Wind Power Fluctuation

In order to reduce its influence on the operation of the power system, a dual-configuration hybrid energy storage system model consisting of two sets of super capacitors and two sets of batteries was constructed. The two sets of super capacitor alternately stabilize the high frequency positive and negative power fluctuation according to the real-time charging state, and are in the charge and discharge states respectively. When any group reaches the upper limit or the lower limit of the charge state, the charge and discharge state , To ensure that two sets of super capacitors in a different charge and discharge working conditions. Two sets of batteries were used to stabilize low frequency positive and negative power fluctuations, the control strategy and the same super capacitor. Finally, the simulation data of a wind farm are analyzed, and the results show that the scheme can effectively improve the utilization efficiency of the energy storage device and reduce its capacity configuration, and greatly reduce the number of times of charge and discharge of the energy storage device and improve the cycle life.