US 11,742,661 B2
Augmented bus impedance and thump control for electrical power systems
Stephen B. Kuznetsov, Marlborough, MA (US)
Assigned to Raytheon Company, Waltham, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Oct. 16, 2020, as Appl. No. 17/73,219.
Prior Publication US 2022/0123555 A1, Apr. 21, 2022
Int. Cl. H02J 3/16 (2006.01); H02J 3/18 (2006.01); H02K 7/02 (2006.01); H02P 9/00 (2006.01)
CPC H02J 3/16 (2013.01) [H02J 3/1885 (2013.01); H02K 7/025 (2013.01); H02P 9/007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
a power distribution bus configured to distribute power from an electrical power source;
a plurality of electrical loads configured to receive portions of the power from the electrical power source, wherein real and reactive power associated with one of the electrical loads oscillate at a low frequency and generate a thump condition, and wherein the low frequency is greater than 1 Hertz;
a plurality of frequency converters connected in parallel on the power distribution bus, each frequency converter corresponding to one of the electrical loads, each frequency converter configured to convert a frequency of the power from the electrical power source to an output frequency associated with the corresponding electrical load and provide primarily real power to the corresponding electrical load;
a flywheel configured to rotate in order to store inertial energy that is convertible to power one or more of the electrical loads;
a doubly-fed induction machine (DFIM) coupled to the flywheel and comprising a plurality of DFIM tertiary winding ports, each DFIM tertiary winding port configured to provide leading reactive power to a corresponding one of the electrical loads, the DFIM configured to:
reduce transmission impedance and reduce voltage drop on the power distribution bus in response to a change in power at one or more of the electrical loads; and
extract energy associated with the thump condition from or return energy associated with the thump condition to the flywheel in order to reduce an impact of the thump condition on the electrical power source or the system; and
a plurality of nodes, each node corresponding to one of the electrical loads, each node configured to combine the primarily real power from the corresponding frequency converter and the leading reactive power from the corresponding DFIM tertiary winding port.