Abstract: A method for controlling a microgrid of a hydrometallurgical plant based on an energy storage frequency converter includes: controlling the opening and closing of a first circuit breaker and a second circuit breaker based on frequency change data of an AC bus in a plant microgrid. The energy storage frequency converter includes an energy storage unit, a first AC-DC converter, and an inverter. An input end of the first AC-DC converter is connected to an external power grid through an AC bus, and a first circuit breaker is provided between the first AC-DC converter and the external power grid. An input end of the inverter is connected to an output end of the first AC-DC converter, and an output end is connected to a variable frequency motor. The energy storage unit is connected between the output end of the first AC-DC converter.

Abstract: A method for controlling a microgrid of a hydrometallurgical plant based on an energy storage frequency converter includes: controlling the opening and closing of a first circuit breaker and a second circuit breaker based on frequency change data of an AC bus in a plant microgrid. The energy storage frequency converter includes an energy storage unit, a first AC-DC converter, and an inverter. An input end of the first AC-DC converter is connected to an external power grid through an AC bus, and a first circuit breaker is provided between the first AC-DC converter and the external power grid. An input end of the inverter is connected to an output end of the first AC-DC converter, and an output end is connected to a variable frequency motor. The energy storage unit is connected between the output end of the first AC-DC converter.

Abstract: A hybrid load-energy storage system applicable to a microgrid of a hydrometallurgical plant, includes: a plurality of first electrical equipment, a plurality of second electrical equipment, first energy storage equipment, and second energy storage equipment. An electric usage priority of the first electrical equipment is lower than that of the second electrical equipment. The first energy storage equipment is on-grid and off-grid energy storage equipment, and the second energy storage equipment is grid-forming energy storage equipment. The first electrical equipment is connected to the first energy storage equipment via branches provided with first circuit breakers, and the second electrical equipment is connected to the second energy storage equipment via branches provided with second circuit breakers. The first second energy storage equipment are respectively connected to an AC bus via branches provided with a third and a fourth circuit breakers, and the AC bus is connected to an external power grid.