An electric power storage system includes: a solar battery(10), a solar-battery DC/AC converter(20) converting the DC power of the solar battery into AC power at a prescribed frequency and supplying it to AC wiring(31), a battery(70), a charger(60) chargin...

There is provided a secondary battery system which converts direct current power supplied from secondary batteries (B1 to B3) into alternating current power by power converters (INV1 to INV3), and supplies the converted power to an electric power system on...

A grid-connected energy storage system (200) capable of increasing the efficiency of a converter and a method of controlling the system are disclosed. The grid-connected energy storage system can increase the efficiency of a converter (211) by measuring ge...

A grid-connected power storage system (200) for coupling a power generation system (230) to a grid (240), including: a main battery (220a) for discharging stored power to the load system (250); at least one additional battery (220b) coupled to the main bat...

An interconnected system that supplies power to a power system, and includes a power generator that changes in output, and an electric power storage-compensation device. The interconnected system is controlled so that operation of a sodium-sulfur battery t...

A method for controlling an energy storage system is described. The method makes use of a model based predictive controller to optimise the charging/discharging rates of energy storage elements in a hybrid energy storage system.

A power supply apparatus for electrical and/or electronic user devices, comprising an uninterruptible power supply (2) which can be connected electrically to at least one primary power source (3), to at least one secondary power source (4), and to one or m...

A turbogenerator/motor control arrangement (10, 156) for connection to an AC power grid (18, 152). The turbogenerator/motor control arrangement comprises at least one AC generator (166), at least one turbine (168) operatively connected to the generator (16...

A method of operating a power supply system, and a power supply system, that serve to achieve efficient operation of power generating units and reduce operating time, are provided. [0002] In a method of operating a power supply system in which a secondary ...