Battery system of energy storage power station and control method

The embodiment of the invention discloses an energy storage power station battery system and a control method, the system comprises at least one battery cluster, an energy storage converter and a test support module, each battery cluster is electrically connected with the energy storage converter through a first parallel branch and is electrically connected with the test support module through a second parallel branch; the number of the first parallel branches and the number of the second parallel branches are matched with the number of the battery clusters; a first switching device is arranged on each branch of the first parallel branch; a second switching device is arranged on each branch of the second parallel branch; a direct connection circuit is arranged between the energy storage converter and the test support module, and a third switch device is arranged on the direct connection circuit. According to the embodiment of the invention, the system can independently analyze the target battery cluster under