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Inventor

Armando Guzman-Casillas

Inventor
Pullman, WA, US

Overview

56→
Patents
1997–2020
Patent span
Electricity
Primary field (CPC H)

Patents· 56 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H02Hprimary
H02HEmergency protective circuit arrangements32%
G01RMeasuring electric variables31%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids12%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution9%
H02JElectric power networks5%
G05BControl or regulating systems in general4%
G06FElectric digital data processing2%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters2%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems1%
H04BTransmission1%
PatentTitleYear
10,830,832Event direction in line sensors202010,742,022Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements202010,585,133Electric power fault protection device using single-ended traveling wave fault location estimation202010,564,247Testing system for traveling wave fault detectors202010,522,995Overcurrent element in time domain201910,483,747Detection of an electric power system fault direction using traveling waves201910,422,827Time-domain line differential protection of electric power delivery systems201910,310,005Time-domain distance line protection of electric power delivery systems201910,310,004Time-domain differential line protection of electric power delivery systems201910,302,690Traveling wave based single end fault location201910,295,585Traveling wave based single end fault location201910,261,567Automatically configurable intelligent electronic device201910,228,409Fault location using traveling waves201910,090,664Time-domain directional line protection of electric power delivery systems20189,941,684Phase and ground protection using tilt-limited adaptive quadrilateral characteristic20189,627,881'Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements'20179,594,112'Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements'20179,588,168'Fault location using traveling waves'20179,470,748'Fault detection in electric power delivery systems using underreach, directional, and traveling wave elements'20169,257,827'Electrical power system phase and ground protection using an adaptive quadrilateral characteristic'20168,990,036'Power line parameter adjustment and fault location using traveling waves'20158,942,954'Fault location in a non-homogeneous electric power line'20158,781,766'Fault location using traveling waves'20148,655,609'Fault location using traveling waves'20148,655,608'Symmetrical component amplitude and phase comparators for line protection using time stamped data'20148,558,551'Fault location in electric power delivery systems'20138,525,522'Fault location in electric power delivery systems'20138,494,795'Apparatus and method for estimating synchronized phasors at predetermined times referenced to a common time standard in an electrical system'20138,410,785'Electrical power system phase and ground protection using an adaptive quadrilateral characteristics'20138,405,944'Distributed bus differential protection using time-stamped data'20138,346,402'Islanding detection in an electrical power delivery system'20138,321,162'Minimizing circulating current using time-aligned data'20128,194,374'Differential element with harmonic blocking and harmonic restraint operating in parallel'20128,112,235'State and topology processor'20128,031,447'Transformer through-fault current monitor'20117,987,059'Real-time power system oscillation detection using modal analysis'20117,930,117'Systems and methods for power swing and out-of-step detection using time stamped data'20117,856,327'State and topology processor'20107,710,693'Apparatus and method for providing protection for a synchronous electrical generator in a power system'20107,630,863'Apparatus, method, and system for wide-area protection and control using power system data having a time component associated therewith'20097,582,986'Compensated inverse-time undervoltage load shedding systems'20097,570,469'Dynamically configurable relay element and related methods'20097,480,580'Apparatus and method for estimating synchronized phasors at predetermined times referenced to an absolute time standard in an electrical system'20097,196,884'Apparatus and method for detecting the loss of a current transformer connection coupling a current differential relay to an element of a power system'20076,845,333'Protective relay with synchronized phasor measurement capability for use in electric power systems'20056,757,146'Instantaneous overcurrent element for heavily saturated current in a power system'20046,662,124'Protective relay with synchronized phasor measurement capability for use in electric power systems'20036,608,742'Voltage and current source selection system for use in the protection, automation and control of an electric power system'20036,603,298'System for estimating the frequency of the power signal on a power transmission line'20036,411,865'System for protection zone selection in microprocessor-based relays in an electric power system'20026,356,421'System for power transformer differential protection'20026,341,055'Restraint-type differential relay'20026,028,754'System for preventing undesired protective relay tripping actions due to coupling capacitor voltage transformer transients'20005,963,404'Restricted earth fault protection for transformers using a directional element'19995,731,943'Protective relay having out-of-step logic capability'19985,694,281'Zero sequence voltage-polarized directional element for protective relays'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2020Patents assigned to SCHWEITZER ENGINEERING LAB INC (54)· patent assignee history
1997–2020Based in Pullman, WA, US· patent location history
2012–2016Patents assigned to GUZMAN-CASILLAS ARMANDO (12)· patent assignee history
2012–2013Patents assigned to DONOLO MARCOS A (3)· patent assignee history
2013–2015Patents assigned to GONG YANFENG (3)· patent assignee history
2013–2015Patents assigned to MYNAM MANGAPATHIRAO VENKATA (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
SCHWEITZER ENGINEERING LAB INC541997–2020
GUZMAN-CASILLAS ARMANDOself122012–2016
DONOLO MARCOS A32012–2013
GONG YANFENG32013–2015
MYNAM MANGAPATHIRAO VENKATA32013–2015
Locations
LocationPatentsSpan
Pullman, Washington, US561997–2020