A digital network protector relay samples the polyphase current, network voltage and phasing voltage at 16, and preferably 32, times per cycle so that up to the seventh and fifteenth harmonics, respectively, are eliminated from the sequence calculation used to make trip and close decisions. The relay also provides metering, forward overcurrent protection, and an anti-pumping feature, the latter of which locks the circuit breaker out if a selected number of breaker operations is exceeded during a given time interval. Sequential sampling of the polyphase current and voltages by a single analog to digital converter reduces the cost of the relay. In order to accommodate metering and extraction of the fundamental components of the current and voltages for the sequence calculations, the polyphase current and network voltage are sampled sequentially in a first order for a given number of cycles and then in a second reverse order for the same given number of cycles.
Michael B. Brennen - Pittsburgh PA Steven A. Moran - Pittsburgh PA Laszlo Gyugyi - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 112 G05F 170
US Classification:
363 71
Abstract:
A novel active power line conditioner is disclosed. The apparatus includes a parallel inverter, with a dc-link, coupled to an output line. The parallel inverter is controlled by a parallel inverter controller which forces the parallel inverter to act as a variable capacitor or inductor. The parallel inverter controller identifies and feeds-forward a desired phase shift value between an active power line conditioner voltage output signal and an active power line conditioner voltage input signal. Utilization of the desired phase shift value results in voltage control of the dc-link of the parallel inverter. The parallel inverter controller also produces a tuning capacitance current reference signal which reduces voltage magnitude errors of the output voltage.
Active Power Line Conditioner With Synchronous Transformation Control
Steven A. Moran - Pittsburgh PA Michael B. Brennen - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 112
US Classification:
307105
Abstract:
An improved active power line conditioner is disclosed. The active power line conditioner includes a series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a three phase load current which includes fundamental components and harmonic components. An energy storage element is electrically connected between the series inverter and the parallel inverter. The series inverter is controlled by a series filter controller which performs synchronous transformations on the load current to generate a series filter feedforward signal corresponding to the fundamental components of the load current. The series filter feedforward signal is applied to the series inverter to generate sinusoidal input currents for the non-linear load. The parallel inverter is controlled by a parallel filter controller which performs synchronous transformations on the load current or series inverter input voltages to generate a parallel filter signal corresponding to the harmonic ripple components of the load current. The parallel filter signal is applied to the parallel inverter to generate sinusoidal voltages for the non-linear load.
Three-Phase Active Filter Utilizing Rotating Axis Transformation
A three-phase active filter for connection into a three-phase power distribution system to compensate undesirable harmonic deviations. A converter is electrically connected between the power distribution system and a DC energy storage element. The converter is selectively controlled by control means to effectuate a flow of energy between the system and the storage element to offset the harmonic deviations. To improve the dynamic response of the filter, the control means utilize vector control principles. Specifically, a synchronous fundamental vector of AC energy waveforms in the power distribution system is derived in a rotating reference frame. Fundamental reference signals are then produced in a stationary reference frame which are compared with corresponding actual condition signals. Error signals thus produced are then utilized to operate the converter. To compensate losses in the storage element and inverter, the control means preferably further comprise loss compensation means also utilizing vector control principles.
Highly Fault Tolerant Active Power Line Conditioner
Michael B. Brennen - Pittsburgh PA Steven A. Moran - Pittsburgh PA Scott K. Suko - Elkridge MD
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 112 G05F 170
US Classification:
363 71
Abstract:
An improved active power line conditioner is disclosed. The active power line conditioner includes a series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a load current which includes fundamental components and harmonic components. An energy storage element is electrically connected between the series inverter and the parallel inverter. The parallel inverter is used for current control functions, while the series inverter is used for instantaneous output voltage regulation. In one embodiment of the invention, a parallel current limiter is used for the parallel inverter. The parallel current limiter is fixed to satisfy specified output voltage total harmonic distortion requirements or peak to rms output current ratios in the active power line conditioner. A series current limiter may be used for the series inverter. The series current limiter is set slightly above the peak of the active power line conditioner input current fundamental.
Active Power Line Conditioner With Fundamental Negative Sequence Compensation
Steven A. Moran - Pittsburgh PA Michael B. Brennen - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 112 H02M 540 G05F 170
US Classification:
363 40
Abstract:
An improved active power line conditioner is disclosed. A series inverter is controlled by a series filter controller which performs synchronous transformations on a load current to generate a series filter feedforward signal corresponding to the fundamental components of the load current. The series filter controller also generates a series filter reference signal corresponding to a negative sequence fundamental output voltage. The series filter feedforward signal and the series filter reference signal are combined to form a series filter compensation signal. The series filter compensation signal is applied to the series inverter to generate sinusoidal input currents, with negative sequence fundamental output voltage compensation, for a non-linear load. A parallel inverter is controlled by a parallel filter controller which performs synchronous transformations to generate a parallel filter feedforward signal corresponding to the harmonic ripple components of the load current. The parallel filter controller also generates a parallel filter reference signal corresponding to a negative sequence fundamental source current.
Active Power Line Conditioner With Low Cost Surge Protection And Fast Overload Recovery
Michael B. Brennen - Pittsburgh PA Steven A. Moran - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 754 H02M 7505 H02M 7521
US Classification:
364483
Abstract:
These and other objects are achieved by an improved active power line conditioner in accordance with the invention. The active power line conditioner includes series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a load current which includes fundamental components and harmonic components. An energy storage element is electrically connected between the series inverter and the parallel inverter. A fault condition shorting circuit is supplied in accordance with the invention. The fault condition shorting circuit is coupled to a secondary transformer winding within the series inverter. The fault condition shorting circuit includes a diode bridge which conveys diode bridge current only in the presence of an overvoltage or overcurrent condition. A threshold device is connected to the diode bridge and conducts threshold device current in response to the diode bridge current. The circuit also includes a thyristor with its gate coupled to the threshold device.
Active Power Line Conditioner With A Derived Load Current Fundamental Signal For Fast Dynamic Response
Michael B. Brennen - Pittsburgh PA Steven A. Moran - Pittsburgh PA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
H02M 112 H02M 540 G05F 170
US Classification:
363 40
Abstract:
An improved active power line conditioner with fast dynamic response is disclosed. The active power line conditioner includes a series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a three phase load current which includes fundamental components and harmonic components. An energy storage element is electrically connected between the series inverter and the parallel inverter. The load current fundamental signal is derived and is multiplied by a derived voltage output/input ratio to render a current reference product. The current reference product may be further modified by a user-set displacement power factor correction ratio. The current reference product is applied to the series inverter for fast dynamic response within the active power line conditioner.
Name / Title
Company / Classification
Phones & Addresses
Steven Moran Principal
Powercore System Business Services
838 Ella St, Pittsburgh, PA 15243
Steven Richard Moran
FAST FLOW PLUMBING & AIR LLC
3538 E Edgewood Ave, Mesa, AZ 85204 6905 S Rainbow Rd, Buckeye, AZ 85326
Steven R Moran
MORAN TRANSPORTATION LLC
Steven Moran Principal
Moran Consulting & Design Power Electronics and Control System Design & Consulting
Mayo ClinicMayo Clinic Rochester Gonda 200 1 St SW, Rochester, MN 55905 5072842511 (phone), 5072841803 (fax)
Mayo ClinicMayo Clinic Orthopedic Surgery 200 1 St SW, Rochester, MN 55905 5072842511 (phone), 5072664234 (fax)
Education:
Medical School University of Rochester School of Medicine and Dentistry Graduated: 1995
Procedures:
Arthrocentesis Esophageal Dilatation Mastectomy Tracheostomy Carpal Tunnel Decompression Lower Arm/Elbow/Wrist Fractures and Dislocations Skull/Facial Bone Fractures and Dislocations Wound Care
Dr. Moran graduated from the University of Rochester School of Medicine and Dentistry in 1995. He works in Rochester, MN and 1 other location and specializes in Hand Surgery and Plastic Surgery. Dr. Moran is affiliated with Mayo Clinic Hospital-Rochester Methodist Campus and Saint Marys Hospital.
Abb May 2015 - Oct 2015
Independent Consultant
Power One 2011 - Nov 2013
Senior Staff Engineer
Converteam Naval Systems 2008 - 2009
Senior R and D Engineer
Emerson Network Power 2005 - 2008
Senior Development Scientist
Mesta Electronics 2001 - 2004
Consulting Engineer
Education:
University of Pittsburgh
Bachelors, Bachelor of Science In Electrical Engineering
Skills:
Hardware Architecture Medium Voltage Inverter Design Power Applied R&D Magnetics Specification/Design Analog Circuit Design Power Supplies Pcb Design Analog Sensors Electronics Power Electronics Microcontrollers Inverter Design Engineering Circuit Design Power Electronics Design Embedded Systems Inverters Electrical Engineering Analog Design Algorithm Development Research Pspice Applied Sciences Dsp Controller Design Simulink Control Systems Grid Connect Inverter Design
Leadership Management Microsoft Office Microsoft Word Project Management Powerpoint Research Microsoft Excel English Training Process Improvement Customer Service Windows Sales
the iPhones, and sometimes that requires going through tens of thousands of number combinations. Those who work at the facility, including director Steven Moran, also attempt to narrow down possibilities using birthdays, significant dates, and other info that could be used in each specific case for an
Date: Jan 21, 2020
Category: Technology
Source: Google
Cooking And Evolution: Did Softer Foods Give Us The F-Word? : The Salt
These slips of the tongue sometimes caught on and became standard part of human languages. "That doesn't mean that labiodentals will emerge within all languages," says Steven Moran, another linguist at the University of Zurich involved in the research. "It does mean that the probability of producin
Date: Mar 14, 2019
Category: Science
Source: Google
Googleplus
Steven Moran
Work:
University of Zurich University of Munich
Education:
University of Washington
Steven Moran
Work:
Cineworld - Multifunctional (2011)
Education:
Sheffield Hallam University - Meng Aerospace Engineering
Steven Moran
Work:
Bumper Authority - Owner
Steven Moran
Work:
Exitcertified - Instructor
Steven Moran
Tagline:
That fluffy white kid
Bragging Rights:
A prodigy Vanilla Ice
Steven Moran
Steven Moran
Steven Moran
Youtube
Steve Moran - Wasn't Meant To Be This Way (Of...
Official music video from Steve Moran (Wasn't Meant To Be This Way) Fe...
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Pastor Steven Moran
Pastor Steven Moran preaching@ Casa del Alfarero. Watsonville, CA. 11/...
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25m 22s
Steven Moran - 2017 RESESS Colloquium
Title: Tracing Carbon Cycling in the Atmosphere and Oceans During the ...
Duration:
15m 35s
Back & Bis // Texas Shredder Physique Prep Ep...
This is the first video in my Texas Shredder men's physique prep. Like...
Duration:
10m 55s
First Fruits of the Lord | Pastor Steven Moran
Centro de Nueva Vida Servicio en Espaol (Shelton) 9am 1331 E Shelton S...
Duration:
1h 48m 16s
Rise and Grind // Texas Shredder Ep. 16 // St...
Rise and grind. 38 days out from the competition. Like and subscribe i...