Luther Scott Anderson

US Patent:

6608742, Aug 19, 2003

Filed:

Jul 6, 2001

Appl. No.:

09/899961

Inventors:

Jeffrey B. Roberts - Viola ID
Armando Guzman-Casillas - Pullman WA
Joseph B. Mooney - Colfax WA
Luther S. Anderson - Pullman WA

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

H02H 300

US Classification:

361 64

Abstract:

The system includes a plurality of protection application elements to accomplish various power system protection functions, including for example line protection, line fault location, current direction determination, breaker protection and synchronism check, among others. The system includes local sources of current and voltage information for the protective functions as well as a receiving section for receiving such current and voltage values from a remote source, such as another protection device, as well as other necessary input information for the protective functions. A selection logic section is responsive to the output of the protective function elements, as well as the local and remote data to determine whether the primary or local sources are to be used. The outputs of the protective function elements are used by an output section to control circuit breakers and the like and are also transmitted, with the local and remote source quantities, to other protective devices.

US Patent:

6662124, Dec 9, 2003

Filed:

Apr 17, 2002

Appl. No.:

10/124858

Inventors:

Luther S. Anderson - Pullman WA
Armando Guzman-Casillas - Pullman WA
Gregary C. Zweigle - Pullman WA
Gabriel Benmouyal - Boucherville, CA

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

G01R 1902

US Classification:

702 65, 324 7615

Abstract:

The relay system obtains voltage and current values from a power line and uses a first sampling element to sample the voltage and current values at selected intervals of time. The resulting sampled signals are used for power system-wide protection, control, monitoring and metering. The sampled signals are then resampled at a rate which is a selected multiple of the power system frequency. The results of the resampling are used by processing circuitry for protection functions including fault determinations.

US Patent:

7480580, Jan 20, 2009

Filed:

Aug 15, 2006

Appl. No.:

11/504788

Inventors:

Gregary C. Zweigle - Pullman WA, US
Luther S. Anderson - Pullman WA, US
Armando Guzman-Casillas - Pullman WA, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

G01R 27/00

US Classification:

702106, 702 60

Abstract:

An apparatus and method estimates a plurality of synchronized phasors at predetermined times referenced to an absolute time standard in an electrical power system. The method includes acquiring and determining a frequency of a power system signal, sampling the power system signal at a sampling interval rate based on a frequency of the power system signal to form signal samples, and generating a plurality of acquisition time values based on an occurrence of each of the signal samples at a corresponding plurality of different times referenced to the absolute time standard. The method further includes adjusting a phasor of each of the signal samples based on a time difference between a corresponding selected acquisition time value and a predetermined time referenced to an absolute time standard to form the plurality of synchronized phasors.

US Patent:

7570469, Aug 4, 2009

Filed:

Jun 23, 2006

Appl. No.:

11/473432

Inventors:

Armando Guzman-Casillas - Pullman WA, US
Luther S. Anderson - Pullman WA, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

H02H 3/26

US Classification:

361 62, 361 82

Abstract:

A dynamically configurable relay element configured to protect an electrical system, including a dynamically calculated relay operating quantity, a dynamically calculated relay pickup setting, a dynamically calculated time dial, a plurality of dynamically calculated variables that define a characteristic of the dynamically configurable relay element, and a dynamically calculated operating time, the dynamically calculated operating time based on the dynamically calculated relay operating quantity, the dynamically calculated relay pickup setting, the dynamically calculated time dial and the plurality of dynamically calculated variables. The relay element may be an inverse-time overcurrent element, an instantaneous overcurrent element, an adaptive pickup overcurrent element, and inverse-time overvoltage element, a voltage restrained overcurrent element, and an inverse-time undervoltage element.

US Patent:

7692538, Apr 6, 2010

Filed:

May 18, 2007

Appl. No.:

11/750947

Inventors:

Luther S. Anderson - Pullman WA, US
Mark J. Bosold - Pullman WA, US
Douglas A. Park - Palouse WA, US
Laurence Virgl Feight - Island Lake IL, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

G08B 1/08

US Classification:

3405391, 340638, 340639, 324500, 324522

Abstract:

A user interface for a wireless device used to monitor multiple groups of faulted circuit indicators. Each group of faulted circuit indicators includes a radio interface unit, which is coupled to each of the faulted circuit indicators in the group. The user interface includes an identification indicator, which includes a plurality of radio interface unit status indicators, each of which corresponds to a particular radio interface unit, and which indicates a selected radio interface unit. The user interface also includes a way indicator comprising a plurality of faulted circuit indicator status indicators, each of which corresponds to a particular faulted circuit indicator coupled to the selected radio interface unit. In addition, each radio interface unit status indicator indicates whether a particular radio interface unit coupled to a faulted circuit indicator is asserting a fault condition.

US Patent:

7868776, Jan 11, 2011

Filed:

May 18, 2007

Appl. No.:

11/750904

Inventors:

James R. Kesler - Pullman WA, US
Luther S. Anderson - Pullman WA, US
Steven A. McMahon - Clarkston WA, US
Witold R. Teller - Pullman WA, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

G08B 21/00

US Classification:

340635, 340643, 324529

Abstract:

A system is provided for adjusting settings of a power system device. In one embodiment, the setting adjusted is an identification setting of the power system device. The system generally includes an actuator having a select arrangement of magnets. A magnetic field sensor is provided for sensing the select arrangement of magnets. A microprocessor is coupled to the magnetic field sensor such that upon sensing the select arrangement of magnets by the magnetic field sensor, the microprocessor establishes an identification setting based upon the select arrangement. The various embodiments of the present invention provide an apparatus and system for adjusting settings of power system devices in harsh conditions, such as persistent in water.

US Patent:

7877624, Jan 25, 2011

Filed:

May 18, 2007

Appl. No.:

11/750932

Inventors:

Douglas A. Park - Palouse WA, US
Witold R. Teller - Pullman WA, US
Luther S. Anderson - Pullman WA, US
Steven A. McMahon - Clarkston WA, US
Donald C. Hicks - Pullman WA, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

G06F 11/00

US Classification:

714 1

Abstract:

A wireless communications system for viewing and modifying memory locations within a power system device is provided including a wireless device and a power system device. The wireless device includes an input mechanism adapted to accept input from a user indicating a memory location the user wishes to view; a first radio frequency transmitter for transmitting a first signal including the memory location within the power system device the user wishes to view; and a first radio frequency receiver for receiving a second signal. The power system device includes at least one randomly accessible memory location and a processor coupled to at least one randomly accessible memory location; a second radio frequency receiver coupled to the processor and a second radio frequency transmitter coupled to the processor for receiving the first signal. The processor retrieves the value of the memory location included within the first signal and activates the second radio frequency transmitter to transmit a second signal including the value of the memory location. The value of the memory location may be a command or control that is executed by the power system device.

US Patent:

8111492, Feb 7, 2012

Filed:

Apr 19, 2010

Appl. No.:

12/763090

Inventors:

Tony J. Lee - Pullman WA, US
Bogdan Z. Kasztenny - Markham, CA
Luther S. Anderson - Pullman WA, US

Assignee:

Schweitzer Engineering Laboratories, Inc. - Pullman WA

International Classification:

H02H 7/00

US Classification:

361 64

Abstract:

An intelligent electronic device creates one or more virtual communications channels using unused or dedicated bits from a primary real-time communications channel. The virtual communications channels are used to transport low-speed information, such as executable commands, or automatic functions not requiring high bandwidth.