Patents by Inventor Håkan Winter

Håkan Winter 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).

  • Device for earth fault current compensation in power networks
    Patent number: 11081883
    Abstract: A device comprising at least two controllable reactance elements (1) arranged to compensate a single phase-to-earth fault current in a power network with a power transformer (3). The at least two controllable reactance elements (1) are each connected with one side to two different voltages of a three phase voltage source which is synchronous with the power network, and that the reactance elements with their other side are jointly connected to the neutral (N) of the power network or its equivalent. The reactance elements are individually controllable by a control unit (2) designed to control the neutral voltage of the power transformer (3) or its equivalent with respect to amplitude and phase in relation to the power transformer's own voltage system. A method in relation to the device is also disclosed.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: August 3, 2021
    Assignee: Swedish Neutral AB
    Inventors: Klaus Winter, Andreas Winter, Håkan Winter
  • A DEVICE FOR EARTH FAULT CURRENT COMPENSATION IN POWER NETWORKS
    Publication number: 20200099220
    Abstract: A device comprising at least two controllable reactance elements (1) arranged to compensate a single phase-to-earth fault current in a power network with a power transformer (3). The at least two controllable reactance elements (1) are each connected with one side to two different voltages of a three phase voltage source which is synchronous with the power network, and that the reactance elements with their other side are jointly connected to the neutral (N) of the power network or its equivalent. The reactance elements are individually controllable by a control unit (2) designed to control the neutral voltage of the power transformer (3) or its equivalent with respect to amplitude and phase in relation to the power transformer's own voltage system. A method in relation to the device is also disclosed.
    Type: Application
    Filed: May 18, 2018
    Publication date: March 26, 2020
    Inventors: Klaus Winter, Andreas Winter, Håkan Winter