Micro-grid hybrid energy storage system and control method

The invention relates to the technical field of new energy storage, in particular to a micro-grid hybrid energy storage system and a control method. The control method comprises the following steps: a filtering power distribution step: performing primary distribution on high-frequency power and low-frequency power according to a proportional relation of real-time charge state values of a super capacitor bank and a lithium battery pack; and a filtering time constant adjustment step: partitioning the charge-discharge state of charge, and adjusting the filtering time constants in different intervals to obtain the reference power of the super capacitor bank and the lithium battery pack. Through the power distribution adjustment of the steps, the working state of each energy storage element can be effectively considered, and the filtering time constants in different charge state intervals are adjusted on the basis of fully utilizing the characteristic of rapid response of the super capacitor ...