| US 7,465,872 B1 | ||
| Photovoltaic power converter system with a controller configured to actively compensate load harmonics | ||
| Michael Andrew de Rooij, Clifton Park, N.Y. (US); Robert Louis Steigerwald, Burnt Hills, N.Y. (US); and Eladio Clemente Delgado, Burnt Hills, N.Y. (US) | ||
| Assigned to General Electric Company, Niskayuna, N.Y. (US) | ||
| Filed on Dec. 15, 2003, as Appl. No. 10/734,293. | ||
| Int. Cl. H01L 25/00 (2006.01) | ||
| U.S. Cl. 136—243 [363/95; 363/98; 363/906; 307/105; 136/93] | 14 Claims |
| 1. A photovoltaic power converter system comprising:
a photovoltaic array;
an inverter electrically coupled to said photovoltaic array to inject an output current to a mains grid supply voltage; and
a controller including a first circuit coupled to receive a load current and separate out a harmonic component from the load
current to measure a load harmonic current; a second circuit for determining an amplitude of an injectable current available
from the photovoltaic array to generate a fundamental sinusoidal current reference that is phased locked with the mains grid
supply voltage; and a third circuit for combining the load harmonic current and the fundamental sinusoidal current reference
to generate a command output signal,
wherein the controller is configured to generate an error signal based on a difference between the command output signal and
the output current, and
wherein the controller is configured to process the error signal and to generate a switching signal for actuating a switching
gate of said inverter to compensate for the load harmonic current when said inverter injects the output current to the mains
grid supply voltage.
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