Patent ID: 9252599
Filing Date: 2016-02-02
CPC Classification: H02J,Y02E

Claim Text:
1. A method for controlling an energy management system to connect to a grid and to connect to a power load, the energy management system including a renewable energy generation module to generate power and a battery, the method comprising: performing a power determination process that includes determining an amount of first power generated by the energy generation module, determining an amount of second power in the battery, determining an amount of third power consumed by the power load, and determining an amount of fourth power for the grid, wherein the fourth power for the grid is different than the third power consumed by the power load; and performing a power distribution process that includes distributing at least a portion of the first power generated by the energy generation module, distributing at least a portion of the second power in the battery, and distributing at least a portion of the third power supplied by the grid to the battery, to the power load, or to the grid based on the determined amount of the first power, the determined amount of the second power, the determined amount of the third power, and the determined amount of fourth power, wherein the energy generation module includes a photovoltaic (PV) module, and wherein the power distribution process includes a first operational mode in which power generated by the PV module is preferentially supplied to the power load or to the grid, a second operational mode in which power generated by the PV module is supplied to the battery, to store power in the battery, a third operational mode in which power generated by the grid is supplied to the battery, to store power in the battery, a fourth operational mode in which power stored in the battery, is supplied to the grid, a fifth operational mode in which power stored in the battery, is supplied to the power load, and a sixth operational mode in which, upon occurrence of a system error, the energy, management system is disconnected from the grid or the power load and the grid is connected to the power load, wherein direct current (DC) power generated by the PV module is filtered at a DC noise filter before distributing the first power, and wherein the filtered DC power is processed to supply the filtered DC power to the grid or the power load, wherein during the third operational mode, AC power generated by the grid is supplied to a PV inverter via an AC noise filter, a transformer and AC reactors, the PV inverter inverting AC power to DC power for output to a DC power storing terminal such that energy stored in the DC terminal is converted by a DC/DC buck converter for battery storage.