Patents by Inventor Matti Karppanen

Matti Karppanen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and arrangement for tracking the maximum power point of a photovoltaic module
    Patent number: 8704499
    Abstract: A method and apparatus of tracking the maximum power point of a photovoltaic module. The method includes measuring an output voltage of the photovoltaic module, determining an output voltage of the inverter connected to the photovoltaic module, and measuring output current of the inverter connected to the photovoltaic module. A variable relating to energy of the capacitor is defined using the measured PV module output voltage, and a second harmonic component is extracted from the defined variable. A second harmonic component of the module output power is estimated using the defined variable, measured output current of the inverter, and the determined output voltage of the inverter. The estimated and extracted second harmonic components are multiplied, and a DC component is extracted from the product. A control signal for controlling the inverter connected to the photovoltaic module is formed by using the extracted DC component in a PI algorithm.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: April 22, 2014
    Assignee: ABB Research Ltd.
    Inventors: Gerardo Escobar, Tuomas Pulli, Matti Karppanen
  • METHOD AND ARRANGEMENT FOR TRACKING THE MAXIMUM POWER POINT OF A PHOTOVOLTAIC MODULE
    Publication number: 20120069602
    Abstract: A method and apparatus of tracking the maximum power point of a photovoltaic module. The method includes measuring an output voltage of the photovoltaic module, determining an output voltage of the inverter connected to the photovoltaic module, and measuring output current of the inverter connected to the photovoltaic module. A variable relating to energy of the capacitor is defined using the measured PV module output voltage, and a second harmonic component is extracted from the defined variable. A second harmonic component of the module output power is estimated using the defined variable, measured output current of the inverter, and the determined output voltage of the inverter. The estimated and extracted second harmonic components are multiplied, and a DC component is extracted from the product. A control signal for controlling the inverter connected to the photovoltaic module is formed by using the extracted DC component in a PI algorithm.
    Type: Application
    Filed: September 14, 2011
    Publication date: March 22, 2012
    Applicant: ABB RESEARCH LTD
    Inventors: Gerardo Escobar, Tuomas Pulli, Matti Karppanen