GRID-CONNECTED POWER STORAGE SYSTEM AND METHOD FOR CONTROLLING GRID-CONNECTED POWER STORAGE SYSTEM
First Claim
1. A grid-connected power storage system for coupling a power generation system to a grid to supply power to a load system, comprising:
- a main battery for discharging stored power to the load system;
at least one additional battery coupled to the main battery for discharging stored power to the load system;
a bidirectional converter coupled to the main and additional batteries, and comprising a plurality of switches for performing a conversion between a DC link voltage, between the power generation system and the grid, and a battery voltage, a first switch of the plurality of switches corresponding to the main battery and a second switch of the plurality of switches corresponding to the additional battery, wherein the first and second switches are connected to each other in parallel; and
an integrated controller for selectively controlling operations of the first switch and the second switch based on an amount of power used by the load system.
5 Assignments
0 Petitions
Accused Products
Abstract
A grid-connected power storage system for coupling a power generation system to a grid, including: a main battery for discharging stored power to the load system; at least one additional battery coupled to the main battery for discharging stored power to the load system; a bidirectional converter coupled to the main and additional batteries, and including a plurality of switches for performing a conversion between a DC link voltage, between the power generation system and the grid, and a battery voltage, a first switch of the plurality of switches corresponding to the main battery and a second switch of the plurality of switches corresponding to the additional battery, wherein the first and second switches are connected to each other in parallel; and an integrated controller for selectively controlling operations of the first switch and the second switch based on an amount of power used by the load system.
-
Citations
11 Claims
-
1. A grid-connected power storage system for coupling a power generation system to a grid to supply power to a load system, comprising:
-
a main battery for discharging stored power to the load system; at least one additional battery coupled to the main battery for discharging stored power to the load system; a bidirectional converter coupled to the main and additional batteries, and comprising a plurality of switches for performing a conversion between a DC link voltage, between the power generation system and the grid, and a battery voltage, a first switch of the plurality of switches corresponding to the main battery and a second switch of the plurality of switches corresponding to the additional battery, wherein the first and second switches are connected to each other in parallel; and an integrated controller for selectively controlling operations of the first switch and the second switch based on an amount of power used by the load system. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of controlling a grid-connected power storage system which couples a power generation system to a grid to supply power to a load system, the method comprising:
-
determining whether an additional battery is to be coupled to a main battery based on an amount of power utilized by the load system; and outputting a control signal to a bidirectional converter when the additional battery is to be coupled to the main battery, wherein the bidirectional converter comprises a first switch corresponding to the main battery and a second switch corresponding to the additional battery, and wherein the first and second switches are coupled to each other in parallel. - View Dependent Claims (8, 9, 10, 11)
-
Specification