Methods and systems for operating a power converter

摘要

A power conversion system for providing power to an electrical grid is described. The power conversion system includes a power converter coupled to a photovoltaic (PV) array and configured to control a PV array voltage. The power conversion system also includes a system controller communicatively coupled to the power converter and configured to select from a first reduced power operating point and a second reduced power operating point when a power available from the PV array is greater than a rated output power of the power conversion system.

主权项

1. A power conversion system for providing power to an electrical grid comprising:
a power converter coupled to a photovoltaic (PV) array and configured to control a PV array voltage; and a system controller communicatively coupled to said power converter and configured to:
determine a maximum power point of the PV array having a maximum power value and a maximum power point voltage; andselect from a first reduced power operating point and a second reduced power operating point when a power available from the PV array is greater than a rated output power of said power conversion system, wherein:
the first and second reduced power operating points include power values that are substantially identical and less than the maximum power value;the first reduced power operating point selected based on at least one first condition and having a higher voltage than the maximum power point voltage; andthe second reduced power operating point selected based on at least one second condition and having a lower voltage than the maximum power point voltage.