Patents Assigned to Alliant Energy Corporate Services, Inc.
  • Patent number: 9236726
    Abstract: The present invention includes a method for providing ground fault protection to a generator. The method includes determining the existing state of the generator and second, determining the updated alarm or trip conditions of a relay connected to the generator in view of the existing state of the generator. This includes estimating a ratio of the magnitude of the 3rd harmonic neutral voltage to the magnitude of the 3rd harmonic terminal voltage of a generator, along with calculating the residual 3rd harmonic voltage from the estimated 3rd harmonic ratio. From this, a comparison is made between the energy of the residual voltage with a fractional energy of the 3rd harmonic neutral voltage. Based on this comparison, an alarm or trip condition is signaled when the energy of the residual voltage is greater than the fractional energy of the 3rd harmonic neutral voltage.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: January 12, 2016
    Assignee: Alliant Energy Corporate Services, Inc.
    Inventor: Nader Safari-Shad
  • Publication number: 20070266916
    Abstract: A process comprising, providing an agricultural biofuel to a fluidized bed reactor and combusting the agricultural biofuel to produce heat and/or steam is disclosed. In one embodiment systems for generating energy with agricultural biofuel are provided. In one embodiment, the agricultural biofuel is selected from the group consisting of agricultural crops, crop residues, grain processing facility waste, value-added agricultural facility byproducts, livestock production facility waste, livestock processing facility waste and food processing facility waste. In one embodiment, the heat and/or steam is used to generate electricity. In other embodiments, the heat and/or steam is used to power the grain processing facility, livestock production facility, livestock processing facility or food processing facility. In another embodiment, one or more environmental controls are used. In a particular embodiment, ethanol byproducts are used as the agricultural biofuel.
    Type: Application
    Filed: August 1, 2007
    Publication date: November 22, 2007
    Applicants: Harris Contracting Company, Alliant Energy Corporate Services, Inc., Von Roll, Inc.
    Inventors: Brian Copeland, Gregory Coil, Robert Latta, Thomas Lenaghan
  • Patent number: 7263934
    Abstract: A process comprising, providing an agricultural biofuel to a fluidized bed reactor and combusting the agricultural biofuel to produce heat and/or steam is disclosed. In one embodiment, the agricultural biofuel is selected from the group consisting of agricultural crops, crop residues, grain processing facility waste, value-added agricultural facility byproducts, livestock production facility waste, livestock processing facility waste and food processing facility waste. In one embodiment, the heat and/or steam is used to generate electricity. In other embodiments, the heat and/or steam is used to power the grain processing facility, livestock production facility, livestock processing facility or food processing facility. In another embodiment, one or more environmental controls are used. In a particular embodiment, ethanol byproducts are used as the agricultural biofuel.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: September 4, 2007
    Assignees: Harris Contracting Company, Alliant Energy Corporate Services, Inc., VCN Roll, Inc.
    Inventors: Brian Copeland, Gregory Scott Coil, Robert A Latta, Jr., Thomas Anthony Lenaghan