Hybrid energy storage system composite control method based on variable filtering time constant

The invention discloses a hybrid energy storage system composite control method based on a variable filtering time constant. The method comprises the following steps: (1) enabling a monitoring controlsystem to monitor the state of charge of each battery pack of an energy storage system through a data collection module to obtain the state of charge of the whole energy storage system; and (2) according to the state of charge of the energy storage system, adopting a variable filtering time constant control method, and introducing a variable factor gamma to adjust the filtering time constant calculation period Td of the battery energy storage system so as to carry out secondary correction on the filtering time constant and control the output of the energy storage system. Overcharge and overdischarge of the battery energy storage system can be prevented, safe operation of the battery energy storage system is ensured, and the battery life is prolonged. 本发明公开了一种基于可变滤波时间常数的混合储能系统复合控制方法，包括以下步骤(1)监视控制系统通过数据采集模块监测能量储能系统