Power management system

摘要

Provided is a power management system capable of controlling charge and discharge of storage batteries according to power requirement of load even when handling electric power of large scale. A system controller receives load-related information data including the power requirement of load and storage battery-related information data including a state of a storage battery assembly including multiple storage batteries and creates an overall charge-discharge control instruction for the entire power management system based on the load-related information data and the storage battery-related information data. A hierarchical charge-discharge control apparatus receives the overall charge-discharge control instruction from the system controller and performs charge-discharge control of the multiple storage batteries, classified into hierarchical levels, on a hierarchical level basis.

主权项

1. A power management system comprising:
a system controller configured to receive load-related information data including power requirement of a load and storage battery-related information data including state of a storage battery assembly including a plurality of storage batteries and to create an overall charge-discharge control instruction for an entire power management system based on the load-related information data and the storage battery-related information data; a hierarchical charge-discharge control apparatus configured to receive the overall charge-discharge control instruction from the system controller and to perform charge-discharge control of the plurality of storage batteries, which are classified into a plurality of hierarchical levels, on a hierarchical level basis; and a plurality of power converters configured to perform electric power conversion among a power source electrically connectable to the power management system, the storage battery assembly, and the load, wherein the hierarchical levels of the storage battery assembly comprise: level of a storage battery unit including a predetermined number of storage battery packs arranged in an array, each storage battery pack including a plurality of storage battery unit cells; and level of a unit group including a predetermined number of storage battery units arranged and connected to each of the plurality of power converters, the unit groups correspondingly assigned to the plurality of power converters, respectively, the hierarchical charge-discharge control apparatus comprises: a master controller configured to receive an overall charge-discharge control instruction from the system controller and to create an assembly charge-discharge control instruction of the storage battery assembly based on the overall charge-discharge control instruction; and a power converter manager configured to receive the assembly charge-discharge control instruction and to perform charge-discharge control for each of the plurality of power converters by controlling charge-discharge of the storage battery units belonging to the unit group corresponding to each power converter.