Patents Assigned to British Columbia Hydro and Power Authority
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Patent number: 11359980Abstract: There is described a device, such as a wireholder, for measuring a load of an elongate member, such as a power line. The device includes a body, a load-bearing member, and a first sensor operable to measure a load applied to the load-bearing member in a first direction, for example a direction of sensitivity defined by the first sensor. The load-bearing member is movably coupled to the body such that the load-bearing member is displaced from a reference position as a function of a load applied to the load-bearing member in a second direction, such as a direction normal to the first direction. The device may further include a second sensor for measuring a displacement of the load-bearing member.Type: GrantFiled: August 26, 2019Date of Patent: June 14, 2022Assignee: BRITISH COLUMBIA HYDRO AND POWER AUTHORITYInventors: Paul Andrew Hahto, Alexander Donald Kearney
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Patent number: 10598736Abstract: A method for identifying a system anomaly in a power distribution system is described herein. The system anomaly may indicate a non-technical loss or a topology error, including schematic entry errors and component modelling errors in the power distribution system. The method includes a) selecting a common coupling point in the power distribution system, wherein downstream branches are connected to the common coupling point; b) determining voltage estimates of the common coupling point according to electrical measurements from the downstream branches; and c) identifying the system anomaly by determining whether a detection criterion is satisfied using the voltage estimates.Type: GrantFiled: July 31, 2012Date of Patent: March 24, 2020Assignee: British Columbia Hydro and Power AuthorityInventors: Wenpeng Luan, Wilsun Xu, Brian Harapnuk
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Patent number: 9231394Abstract: A cross arm is provided, for use in a support structure for conductors within an electrical grid. The cross arm is made of a cementitious composite and has a rough “C” cross sectional shape. Pairs of the cross arms are attached to utility poles in a parallel position on opposite sides of the utility pole. Alternatively, a single cross arm may be attached to a utility pole. Embedded metal or glass fiber reinforced polymer bars extend along the length of the cross arms.Type: GrantFiled: June 22, 2012Date of Patent: January 5, 2016Assignees: BRITISH COLUMBIA HYDRO AND POWER AUTHORITY, LAFARGE CANADA INC.Inventors: Juan Ignacio Cariaga Crespo, Adelana R. Gilpin-Jackson
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Publication number: 20150316620Abstract: A method for identifying a system anomaly in a power distribution system is described herein. The system anomaly may indicate a non-technical loss or a topology error, including schematic entry errors and component modelling errors in the power distribution system. The method includes a) selecting a common coupling point in the power distribution system, wherein downstream branches are connected to the common coupling point; b) determining voltage estimates of the common coupling point according to electrical measurements from the downstream branches; and c) identifying the system anomaly by determining whether a detection criterion is satisfied using the voltage estimates.Type: ApplicationFiled: July 31, 2012Publication date: November 5, 2015Applicant: British Columbia Hydro and Power AuthorityInventors: Wenpeng Luan, Wilsun Xu, Brian Harapnuk
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Publication number: 20140158418Abstract: A cross arm is provided, for use in a support structure for conductors within an electrical grid. The cross arm is made of a cementitious composite and has a rough “C” cross sectional shape. Pairs of the cross arms are attached to utility poles in a parallel position on opposite sides of the utility pole. Alternatively, a single cross arm may be attached to a utility pole. Embedded metal or glass fibre reinforced polymer bars extend along the length of the cross arms.Type: ApplicationFiled: June 22, 2012Publication date: June 12, 2014Applicant: British Columbia Hydro and Power AuthorityInventors: Juan Ignacio Cariaga Crespo, Adelana R. Gilpin-Jackson, Janos Csaba Toth
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Publication number: 20140131525Abstract: A cross arm is provided, for use in a support structure for conductors within an electrical grid. The cross arm is made of weather resistant glass fibre reinforced two component polyurethane based polymers and has a “C” cross sectional shape typically arranged in a double configuration. Pairs of the cross arms are attached to utility poles in a parallel position on opposite sides of the utility pole to meet predefined design conditions. Alternatively, a single cross arm may be attached to a utility pole.Type: ApplicationFiled: January 22, 2014Publication date: May 15, 2014Applicants: British Columbia Hydro and Power Authority, FRP Transmissions Inc.Inventors: Grant Robert Lockhart, Ralph Walter Ulm, Adelana Gilpin-Jackson, Janos Csaba Toth
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Patent number: 8652629Abstract: A cross arm is provided, for use in a support structure for conductors within an electrical grid. The cross arm is made of weather resistant glass fiber reinforced two component polyurethane based polymers and has a “C” cross sectional shape typically arranged in a double configuration. Pairs of the cross arms are attached to utility poles in a parallel position on opposite sides of the utility pole to meet predefined design conditions. Alternatively, a single cross arm may be attached to a utility pole.Type: GrantFiled: August 31, 2010Date of Patent: February 18, 2014Assignees: FRP Transmission Innovations Inc., British Columbia Hydro and Power AuthorityInventors: Grant Robert Lockhart, Janos Csaba Toth, Ralph Walter Ulm, Adelana Gilpin-Jackson
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Patent number: 8329350Abstract: An electric power generator is particularly suitable for providing back-up power to sites with multiple power requirements. This generator comprises a rack having multiple module bays; at least one power conversion module is mounted in one of the bays and is electrically coupled to a fuel cell stack also mounted in the rack or located remote from the rack. The power conversion module converts the voltage level and/or current type of some of the electricity produced by the stack such that the generator can simultaneously output electricity at multiple voltage levels and/or current types. The rack can be a standardized nineteen relay rack, making the generator relatively compact and compatible with sites configured accept such racks.Type: GrantFiled: June 27, 2012Date of Patent: December 11, 2012Assignee: British Columbia Hydro and Power AuthorityInventor: Alex Lam
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Publication number: 20120270128Abstract: An electric power generator is particularly suitable for providing back-up power to sites with multiple power requirements. This generator comprises a rack having multiple module bays; at least one power conversion module is mounted in one of the bays and is electrically coupled to a fuel cell stack also mounted in the rack or located remote from the rack. The power conversion module converts the voltage level and/or current type of some of the electricity produced by the stack such that the generator can simultaneously output electricity at multiple voltage levels and/or current types. The rack can be a standardized nineteen relay rack, making the generator relatively compact and compatible with sites configured accept such racks.Type: ApplicationFiled: June 27, 2012Publication date: October 25, 2012Applicant: British Columbia Hydro and Power AuthorityInventor: Alex Lam
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Patent number: 8216732Abstract: An electric power generator is particularly suitable for providing back-up power to sites with multiple power requirements. This generator comprises a rack having multiple module bays; at least one power conversion module is mounted in one of the bays and is electrically coupled to a fuel cell stack also mounted in the rack or located remote from the rack. The power conversion module converts the voltage level and/or current type of some of the electricity produced by the stack such that the generator can simultaneously output electricity at multiple voltage levels and/or current types. The rack can be a standardized nineteen relay rack, making the generator relatively compact and compatible with sites configured accept such racks.Type: GrantFiled: September 23, 2005Date of Patent: July 10, 2012Assignee: British Columbia Hydro and Power AuthorityInventor: Alex Lam
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Patent number: 7904261Abstract: A method of state estimation is provided, including: (a) acquiring a plurality of positive sequence voltage and current phasor measurements; (b) designating a reference positive sequence voltage phasor measurement from the acquired phasor measurements; (c) correcting the acquired phasor measurements to account for the reference phasor measurement; (d) calculating complex power having a real component and an imaginary component, using the corrected positive sequence voltage and current phasor measurement; (e) using the real component of said complex power as a calculated mega-watt and the imaginary component of the complex power as a calculated mega-volt-ampere; and (f) using the mega-watt and mega volt-ampere calculations in a state estimation algorithm.Type: GrantFiled: August 24, 2007Date of Patent: March 8, 2011Assignee: British Columbia Hydro and Power AuthorityInventors: Djordje Atanackovic, Greg S. Dwernychuk, Jose Clapauch
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Patent number: 7816927Abstract: A method of identifying voltage instability in a power system via identification of a weakest line and bus that contribute to the collapse of the system is provided. The method includes periodically calculating an extended line stability index for the transmission lines monitored in the power system; and using the extended line stability index to determine the distance of an operation state in the power system from a collapse point of the system caused by voltage instability.Type: GrantFiled: September 25, 2007Date of Patent: October 19, 2010Assignee: British Columbia Hydro and Power AuthorityInventors: Wenyuan Li, Paul Choudhury, Jun Sun, Juan Yu, Yang Wang
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Publication number: 20070254193Abstract: An electric power generator is particularly suitable for providing back-up power to sites with multiple power requirements. This generator comprises a rack having multiple module bays; at least one power conversion module is mounted in one of the bays and is electrically coupled to a fuel cell stack also mounted in the rack or located remote from the rack. The power conversion module converts the voltage level and/or current type of some of the electricity produced by the stack such that the generator can simultaneously output electricity at multiple voltage levels and/or current types. The rack can be a standardized nineteen relay rack, making the generator relatively compact and compatible with sites configured accept such racks.Type: ApplicationFiled: September 23, 2005Publication date: November 1, 2007Applicant: British Columbia Hydro and Power AuthorityInventor: Alex Lam
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Patent number: 7256978Abstract: A gapped ground safety device is provided to protect workers on de-energized underground distribution cable from ground faults or accidental energization. The device comprises a combination precision gap and an MOV surge arrester.Type: GrantFiled: September 12, 2003Date of Patent: August 14, 2007Assignee: British Columbia Hydro and Power AuthorityInventors: Terence Donald Deines, Christopher Paul Morton, Jack H. Sawada, Ching Wah Shum
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Patent number: 7033249Abstract: The invention is an apparatus used for cleaning equipment including extremely high voltage energized electrical equipment using a dry ice blasting stream as the cleaning agent. The apparatus comprises a cleaning wand and a heating mechanism for impeding the formation of condensation and/or frost on the outer surface of the wand, thereby enabling the wand to operate for prolonged periods of time.Type: GrantFiled: May 13, 2005Date of Patent: April 25, 2006Assignee: British Columbia Hydro and Power AuthorityInventors: Bernhard Alexander Spalteholz, Geoffrey Paul Nielsen
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Publication number: 20050272347Abstract: The invention is an apparatus used for cleaning equipment including extremely high voltage energized electrical equipment using a dry ice blasting stream as the cleaning agent. The apparatus comprises a cleaning wand and a heating mechanism for impeding the formation of condensation and/or frost on the outer surface of the wand, thereby enabling the wand to operate for prolonged periods of time.Type: ApplicationFiled: May 13, 2005Publication date: December 8, 2005Applicant: British Columbia Hydro And Power AuthorityInventors: Bernhard Spalteholz, Geoffrey Nielsen
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Publication number: 20040169970Abstract: A gapped ground safety device is provided to protect workers on de-energized underground distribution cable from ground faults or accidental energization. The device comprises a combination precision gap and an MOV surge arrester.Type: ApplicationFiled: September 12, 2003Publication date: September 2, 2004Applicant: British Columbia Hydro and Power AuthorityInventors: Terence Donald Deines, Christopher Paul Morton, Jack H. Sawada, Ching Wah Shum
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Patent number: 6634217Abstract: The present invention provides a method of live testing of the hardness of a target electrical distribution wire having a known gauge, and a tool for same, the method comprising: a) providing a hardness testing tool at the operating end of an insulated tool for manipulating live distribution lines, wherein the hardness testing tool comprises a testing surface of known hardness; b) forcing the testing surface against the target wire; and c) comparing the resultant degree of deformation or lack of deformation on the testing surface with the expected degree of deformation which would occur for wire of that gauge having a specific hardness.Type: GrantFiled: March 28, 2002Date of Patent: October 21, 2003Assignees: British Columbia Hydro and Power Authority, Powertech Labs Inc.Inventors: Gouri S. Bhuyan, Avaral S. Rao, Chien Kang Kung, Dexter G. Tarampi, Roy G. O'Hara
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Patent number: 5638297Abstract: In the past, in electrical power networks, the effects on the system of particular contingencies, such as a given power line being interrupted, have been modelled off-line, so that the proper response to that contingency can be planned ahead of time and acted upon quickly in the event of such contingency. Such models have generally been overly conservative adding considerable cost to power systems.Type: GrantFiled: July 15, 1994Date of Patent: June 10, 1997Assignee: British Columbia Hydro and Power AuthorityInventors: Yakout Mansour, Ebrahim Vaahedi, Allen Y. Chang