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Photovoltaic power converter system with a controller configured to actively compensate load harmonics

United States Patent

December 16, 2008
View the Complete Patent at the US Patent & Trademark Office
Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.
de Rooij; Michael Andrew (Clifton Park, NY), Steigerwald; Robert Louis (Burnt Hills, NY), Delgado; Eladio Clemente (Burnt Hills, NY)
General Electric Company (Niskayuna, NY)
10/ 734,293
December 15, 2003
This invention was made with U.S. Government support through Government Contract Number Sandia 55792 awarded by the Department of Energy, and, in accordance with the terms set forth in said contract, the U.S. Government may have certain rights in the invention.