William F Yadusky

US Patent:

20230111124, Apr 13, 2023

Filed:

Jul 29, 2022

Appl. No.:

17/876683

Inventors:

- Chicago IL, US
Michael G. Ennis - Evanston IL, US
Yoav Sharon - Evanston IL, US
William Yadusky - Franklin WI, US

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H02H 7/06
H02J 3/00
H02H 1/00
G01R 31/08

Abstract:

A system and method for determining the optimal time to perform a pulse test to determine the presence of a fault after a switch opens to clear the fault to prevent generator instability. The method includes detecting the fault, opening a switch to clear the fault, determining an optimal time for performing the pulse test for determining the continued presence of the fault based on predetermined system data and parameters after the switch is opened so as to prevent the pulse test from occurring too early that could cause generator instability, and performing the pulse test at the optimal time to determine if the fault is still present. Determining the optimal time can use available system data and information, such as a priori knowledge or real-time behaviour. If the fault is not present, then the method determines a desired time to perform a reclose operation.

US Patent:

20230051143, Feb 16, 2023

Filed:

Jun 30, 2022

Appl. No.:

17/853974

Inventors:

- Chicago IL, US
Michael G. Ennis - Evanston IL, US
Alejandro Montenegro - Chicago IL, US
Yoav Sharon - Evanston IL, US
William Yadusky - Franklin WI, US

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H03K 3/537
H01T 2/02

Abstract:

A system and method for maintaining electrical stability of a high-voltage transmission power system in response to a fault. The method includes detecting the fault, opening a switch to clear the fault, performing a first pulse test for a predetermined duration of time to determine if the fault is still present, preventing a reclosing operation from occurring if the pulse test indicates that the fault is still present, and allowing the reclosing operation to occur if the first pulse test indicates that the fault is not present. One or more subsequent pulse tests can be performed if the first pulse test is inclusive about the persistence of the fault, where the reclosing operation is prevented from occurring if the pulse tests indicate that the fault is still present and the reclosing operation is allowed if the pulse tests indicate that the fault is no longer present.

US Patent:

20230009635, Jan 12, 2023

Filed:

Jun 30, 2022

Appl. No.:

17/853970

Inventors:

- Chicago IL, US
John French - Chicago IL, US
William Yadusky - Franklin WI, US

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H02H 3/087
H02H 1/00

Abstract:

A series Z-source circuit breaker including a semiconductor switch that breaks source power being provided to a load in response to overcurrent. An electromechanical switch is electrically coupled in parallel with the semiconductor switch, a first capacitor is electrically coupled to an output side of the semiconductor switch, a second capacitor is electrically coupled in parallel with the semiconductor switch, and a delay circuit is electrically coupled in series with the first capacitor. The semiconductor switch is in an open position and the electromechanical switch is in a closed position when overcurrent is not present. Upon detection of overcurrent the semiconductor switch is closed, the electromechanical switch is opened and the delay circuit is controlled to delay when reverse bias current is provided from the first capacitor to the semiconductor switch to prevent source power from being provided to the load to give the electromechanical switch time to open.

US Patent:

20190096573, Mar 28, 2019

Filed:

Aug 28, 2018

Appl. No.:

16/115207

Inventors:

- Chicago IL, US
William Yadusky - Franklin WI, US

Assignee:

S&C Electric Company - Chicago IL

International Classification:

H01F 27/42
G01R 33/00
G05F 1/32
H02J 9/06

Abstract:

Apparatuses and methods are provided for restoring flux in a startup of an uninterruptible power supply device. The uninterruptible power supply device passes voltage to loads while offline. Upon occurrence of a utility disturbance, the output voltage is adjusted while maintaining RMS voltage within a pre-specified window in order to restore flux during startup of the uninterruptible power supply device.

US Patent:

20170214250, Jul 27, 2017

Filed:

Jan 23, 2017

Appl. No.:

15/412417

Inventors:

- Chicago IL, US
William Yadusky - Franklin WI, US
Benjamin M. Stocks - Milwaukee WI, US

International Classification:

H02J 3/46
H02J 3/14
H02J 9/06
H02J 7/00
H02J 3/16
H02J 3/38

Abstract:

Methods for energizing microgrids and microgrid energy distribution systems are provided. A method for energizing a microgrid includes energizing a storage management system (SMS) that is configured to control power distribution in the microgrid. The method further includes connecting a plurality of reactive components to the SMS based on a configuration control programmed into the SMS. The method yet further includes ramping up an output voltage of the SMS based on limiting inrush currents of the plurality of reactive components in the microgrid.