Patents by Inventor Sivaprasad JALDANKI

Sivaprasad JALDANKI 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).

  • Circulating current control in a modular multilevel voltage source converter
    Patent number: 10924029
    Abstract: A modular multilevel voltage source converter and a method and computer program product for handling circulating currents in such a modular multilevel voltage source converter are described. A control unit of the voltage source converter determines a circulating current control signal contribution (ER1?ER2+2VCM) for a phase leg based on the sum of cell voltages in the upper phase arm of the phase leg, the sum of cell voltages in the lower phase arm of the phase leg and at least one modulation reference and combines the circulating control signal contribution with a modulation reference used for one of the phase arms in order to obtain a modified voltage reference for controlling the phase arm to handle a circulating current while a waveshape is formed.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: February 16, 2021
    Assignee: ABB POWER GRIDS SWITZERLAND AG
    Inventors: Sivaprasad Jaldanki, Swakshar Ray
  • CIRCULATING CURRENT CONTROL IN A MODULAR MULTILEVEL VOLTAGE SOURCE CONVERTER
    Publication number: 20190199213
    Abstract: A modular multilevel voltage source converter and a method and computer program product for handling circulating currents in such a modular multilevel voltage source converter are described. A control unit of the voltage source converter determines a circulating current control signal contribution (ER1?ER2+2VCM) for a phase leg based on the sum of cell voltages in the upper phase arm of the phase leg, the sum of cell voltages in the lower phase arm of the phase leg and at least one modulation reference and combines the circulating control signal contribution with a modulation reference used for one of the phase arms in order to obtain a modified voltage reference for controlling the phase arm to handle a circulating current while a waveshape is formed.
    Type: Application
    Filed: September 1, 2016
    Publication date: June 27, 2019
    Applicant: ABB SCHWEIZ AG
    Inventors: Sivaprasad JALDANKI, Swakshar RAY