STORAGE BATTERY CONTROL DEVICE, AND POWER STORAGE SYSTEM

A string system controller changes charge and discharge power of the entire power storage system from a current value to a target value by selectively executing one of a standard slope control of individually calculating a string charge and discharge power instruction value of each predetermined cycle for each of string controllers according to a power storage system charge and discharge power instruction value and individually transmitting the string charge and discharge power instruction value to the string controllers for each predetermined cycle, and a shortest slope control of calculating a string charge and discharge power instruction value common to the plurality of string controllers according to the power storage system charge and discharge power instruction value and simultaneously transmitting the common string charge and discharge power instruction value to the plurality of string controllers.