Power oscillation protection

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6476521
SERIAL NO

09653265

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present invention discloses a system protection scheme comprising of at least two system protection terminals (18), introduced at suitable locations in an electric power system (1). The system protection terminals (18) are interconnected by a communication system (22), preferably using a substantially dedicated communication resource. At least-two of the system protection terminals (18) are equipped to collect measurement signals (72) associated with time stamped voltage or current values of the power system at that particular location or quantities derivable therefrom. The measurements are evaluated and related data is spread to other system protection terminals (18). At least one of the system protection terminals (18) is equipped to evaluate the existence of poorly damped power oscillations in the power network and if necessary provide control signals (74) to power system actuating units. The evaluation is preferably based on changes in the node angle differences between the measurement locations.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ABB ABVASTERAS313

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Karlsson, Daniel Malmo, SE 12 106
Lof, Per-Anders Vallingby, SE 2 70

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (1)
* 5227713 Vernier control system for subsynchronous resonance mitigation 29 1992
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
* 4785405 Power system stabilizer 16 1987
* 5977731 Power system stabilizer and power system stabilization method 15 1999
 
ABB POWER T&D COMPANY INC. (1)
* 4972290 Electric power system with remote monitoring and control of protective relays 54 1989
 
ABB INC. (1)
* 5625277 Dynamic mechanically switched damping system and method for damping power oscillations using the same 5 1995
 
JOHN & MATILDE F. LINDERS FOUNDATION, INC. (1)
* 6313752 System for displaying dynamic on-line operating conditions of an interconnected power transmission network 60 1998
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
* 6728601 Multiple host power control system and method 14 2001
* 2003/0018,921 Multiple host power control system and method 2 2001
 
GENERAL ELECTRIC COMPANY (11)
7747354 Circuit protection system 8 2003
* 9350163 Inter-area oscillation detection 0 2011
* 2013/0100,564 INTER-AREA OSCILLATION DETECTION 5 2011
* 9006933 Power system stabilization 0 2011
* 2013/0099,582 POWER SYSTEM STABILIZATION 2 2011
* 8942856 Power converter and methods of controlling the same 1 2011
* 2013/0166,090 POWER CONVERTER AND METHODS OF CONTROLLING THE SAME 0 2011
* 9043040 Power system stabilization 0 2012
* 2013/0197,705 POWER SYSTEM STABILIZATION 1 2012
8773829 Method and system for power swing detection in a generator 0 2012
* 2013/0234,680 POWER SYSTEM STABILIZATION 1 2013
 
Other [Check patent profile for assignment information] (2)
* 2006/0017,328 Control system for distributed power generation, conversion, and storage system 15 2005
* 2006/0229,768 Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices 23 2006
 
SCHWEITZER ENGINEERING LABORATORIES, INC. (17)
* 7582986 Compensated inverse-time undervoltage load shedding systems 17 2004
* 2006/0077,605 Compensated inverse-time undervoltage load shedding systems 5 2004
7903381 Negative sequence differential element 7 2008
8498832 Method and device for assessing and monitoring voltage security in a power system 4 2008
7930117 Systems and methods for power swing and out-of-step detection using time stamped data 11 2008
* 2009/0089,608 SYSTEMS AND METHODS FOR POWER SWING AND OUT-OF-STEP DETECTION USING TIME STAMPED DATA 21 2008
* 2009/0085,407 METHOD AND DEVICE FOR ASSESSING AND MONITORING VOLTAGE SECURITY IN A POWER SYSTEM 17 2008
8248060 Power angle monitor 3 2008
7987059 Real-time power system oscillation detection using modal analysis 8 2008
* 2009/0099,798 Real-Time Power System Oscillation Detection Using Modal Analysis 18 2008
* 2009/0091,303 Power Angle Monitor 5 2008
8554385 Systems and methods for monitoring and controlling electrical system stability 1 2010
8248061 Power angle monitor 3 2011
8674683 Power angle monitor 4 2012
8912792 Systems and methods for rotor angle measurement in an electrical generator 2 2012
9568513 Systems and methods to detect poorly damped oscillation modes 0 2014
9800055 Synchronization of generators using a common time reference 0 2016
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 6778919 Method for identification of an oscillation in an electrical power supply system 3 2002
 
MONTANA TECH OF THE UNIVERSITY OF MONTANA (2)
* 9293949 Electric power grid signal processing methods, oscillatory mode estimation methods and mode shape estimation methods 1 2012
* 2013/0204,557 Electric Power Grid Monitoring Methods And Apparatus 0 2012
 
SIEMENS ENERGY, INC. (1)
* 6661207 Apparatus and method for protecting synchronous generators against off-nominal frequency deviation and alternating forces excitation 3 2001
 
ABB AB (2)
7732943 Method and a device for selecting and dimensioning measures in a case of instability in an electrical power system 2 2004
* 2007/0257,561 Method and a Device for Selecting and Dimensioning Measures in a Case of Instability in an Electrical Power 2 2004
 
ABB SCHWEIZ AG (2)
* 7107162 Determining an operational limit of a power transmission line 12 2002
* 2005/0222,808 Determining an operational limit of a power transmision line 6 2005
 
PROVENANCE ASSET GROUP LLC (1)
* 6990525 System for selecting data communications service 19 2000
 
ABB RESEARCH LTD. (9)
* 7200500 Determining parameters of an equivalent circuit representing a transmission section of an electrical network 12 2003
7149637 Detecting electromechanical oscillations in power systems 7 2004
* 2005/0187,726 Detecting electromechanical oscillations in power systems 8 2004
* 8019484 Damping electromechanical oscillations in power systems 2 2007
* 2008/0177,425 Damping electromechanical oscillations in power systems 5 2007
* 7973427 Converter control unit 3 2008
* 2009/0079,267 CONVERTER CONTROL UNIT 5 2008
* 2013/0307,331 INVESTIGATING TIMING RELIABILITY IN RELATION TO CONTROL OF A POWER TRANSMISSION SYSTEM 0 2013
* 9500685 Handling resonances in a power transmission system 0 2014
 
BATTELLE MEMORIAL INSTITUTE (5)
* 8073573 Electrical power distribution control methods, electrical energy demand monitoring methods, and power management devices 14 2006
8183826 Battery charging control methods, electric vehicle charging methods, battery charging apparatuses and rechargeable battery systems 18 2009
8478452 Grid regulation services for energy storage devices based on grid frequency 17 2010
8700225 Grid regulation services for energy storage devices based on grid frequency 4 2012
9753440 Grid regulation services for energy storage devices based on grid frequency 0 2013
 
AMPACIMON S.A. (2)
* 8184015 Device, system and method for real-time monitoring of overhead power lines 84 2006
* 2009/0243,876 Device, system and method for real-time monitoring of overhead power lines 31 2006
 
AIZO AG (2)
* 8988248 Data transmission method and device for A/C systems 2 2005
* 2009/0027,175 Data Transmission Method and Device for A/C Systems 0 2005
 
ABB TECHNOLOGY AG (4)
* 2007/0206,644 Remote terminal unit and monitoring, protection and control of power systems 24 2007
* 2011/0153,113 CONTROL OF A VOLTAGE SOURCE CONVERTER USING SYNCHRONOUS MACHINE EMULATION 3 2008
* 2014/0379,152 COORDINATED CONTROL METHOD OF GENERATOR AND SVC FOR IMPROVING POWER THROUGHPUT AND CONTROLLER THEREOF 0 2012
* 2015/0276,832 DETECTION OF ISLANDING CONDITION IN ELECTRICITY NETWORK 0 2015
* Cited By Examiner