Patent ID: 7433215
Filing Date: 2008-10-07
Classification: H01L,H02J,H02M,Y02E

Abstract:
1. A method of operating a three-phase inverter connected to a photovoltaic panel, the method comprising: a) monitoring a DC voltage input to the inverter and waiting for a DC voltage to exceed a predetermined value for the DC voltage, keeping the inverter shut down until the DC voltage exceeds the predetermined value for the DC voltage; b) operating the inverter for a first predetermined period of time before checking the DC voltage and a DC power level; c) interrupting operation of the inverter when the DC voltage is below the predetermined value for the DC voltage or when the DC power level is below a predetermined value for the DC power level; d) if operation of the inverter is interrupted then waiting for a second predetermined period of time before resuming operation of the inverter; and e) repeating steps (c) and (d) and increasing the second predetermined period of time between successive resumptions of operation.