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公开(公告)号：US20180062394A1
公开(公告)日：2018-03-01
申请号：US15243974
申请日：2016-08-23
Applicant: General Electric Company
Inventor： Santosh Sambamoorthy Veda , William James Premerlani
Abstract: A method for operatively coupling a plurality of generating units in at least one micro-grid to a bulk grid, where the at least one micro-grid is configurable to be operatively coupled to the bulk grid via a point of interconnection breaker is presented. The method includes, using a control unit operatively coupled to the at least one micro-grid and the bulk grid, determining one or more bulk grid side parameters and one or more micro-grid side parameters, comparing one or more of the one or more micro-grid side parameters with corresponding one or more bulk grid side parameters, and synchronizing each of the plurality of generating units in the at least one micro-grid with the bulk grid based on the comparison. Further, the method includes connecting simultaneously, using the point of interconnection breaker, each of the plurality of generating units to the bulk grid based on the synchronization.
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公开(公告)号：US09654102B2
公开(公告)日：2017-05-16
申请号：US14510575
申请日：2014-10-09
Applicant: General Electric Company
Inventor： Ruxi Wang , William James Premerlani , Antonio Caiafa , Yan Pan
CPC classification number: H03K17/92 , H01H9/541 , H01H9/542 , H01H2009/543
Abstract: A circuit breaking system includes a first branch including at least one solid-state snubber; a second branch coupled in parallel to the first branch and including a superconductor and a cryogenic contactor coupled in series; and a controller operatively coupled to the at least one solid-state snubber and the cryogenic contactor and programmed to, when a fault occurs in the load circuit, activate the at least one solid-state snubber for migrating flow of the electrical current from the second branch to the first branch, and, when the fault is cleared in the load circuit, activate the cryogenic contactor for migrating the flow of the electrical current from the first branch to the second branch.
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13.发明申请SYSTEMS AND METHODS FOR SWING ANGLE ESTIMATION IN AN ELECTRICAL POWER SYSTEM 审中-公开用于在电力系统中摆动角度估计的系统和方法公开(公告)号：US20150051852A1
公开(公告)日：2015-02-19
申请号：US14519526
申请日：2014-10-21
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Yan Pan , William James Premerlani
IPC: G01R21/133 , G01R25/00
CPC classification number: G01R21/133 , G01R25/00 , H02J3/24
Abstract: A method includes obtaining a voltage phasor, a current phasor and a mechanical rotor angle of a source end generator. A receiving end generator impedance and a line impedance between the source end generator and a receiving end generator is also estimated. Furthermore, a swing angle between an internal voltage of the source end generator and an internal voltage of the receiving end generator as a function of obtained voltage phasor, current phasor, mechanical rotor angle and the impedances is estimated. A power swing condition is then determined based on the estimated swing angle.
Abstract translation: 一种方法包括获得源端发生器的电压相量，电流相量和机械转子角度。 还估计了源端发生器和接收端发生器之间的接收端发生器阻抗和线路阻抗。 此外，估计源端发生器的内部电压与接收端发生器的内部电压之间的摆动角度作为获得的电压相量，电流相量，机械转子角度和阻抗的函数。 然后基于估计的摆动角度确定功率摆动条件。
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公开(公告)号：US08942108B2
公开(公告)日：2015-01-27
申请号：US13714952
申请日：2012-12-14
Applicant: General Electric Company
Inventor： Yan Pan , William James Premerlani
CPC classification number: H04L41/0668 , H02H1/0061 , H02H3/305 , H02J13/00 , H02J13/0079 , H04J3/0638 , H04J3/0641 , H04L12/40 , H04L12/4035 , H04L41/0686 , H04L41/12
Abstract: A differential protection system is provided. The differential protection system includes a local terminal configured to be communicatively coupled directly or indirectly with at least two remote terminals via at least three communication links to form a ring topology or a mesh topology. The differential protection system further includes a controller comprising a communication link decision unit and a clock unit associated with the local terminal. The communication link decision unit is configured to determine some of the at least three communication links as virtually disconnected such that the ring topology or the mesh topology is configured to be converted to a daisy chain topology. The clock unit is configured to time synchronize the local terminal with at least one of the at least two remote terminals when the local terminal and the at least two remote terminals are configured in the daisy chain topology.
Abstract translation: 提供差动保护系统。 差分保护系统包括被配置为经由至少三个通信链路直接或间接地与至少两个远程终端通信地耦合以形成环形拓扑或网格拓扑的本地终端。 差分保护系统还包括控制器，其包括通信链路决定单元和与本地终端相关联的时钟单元。 通信链路决定单元被配置为将所述至少三个通信链路中的一些确定为虚拟断开，使得环形拓扑或网状拓扑被配置为被转换为菊花链拓扑。 时钟单元被配置为当本地终端和至少两个远程终端被配置在菊花链拓扑中时，使本地终端与至少两个远程终端中的至少一个进行时间同步。
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公开(公告)号：US10436823B2
公开(公告)日：2019-10-08
申请号：US14519526
申请日：2014-10-21
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Yan Pan , William James Premerlani
IPC: G01R21/133 , G01R25/00 , H02J3/24
Abstract: A method includes obtaining a voltage phasor, a current phasor and a mechanical rotor angle of a source end generator. A receiving end generator impedance and a line impedance between the source end generator and a receiving end generator is also estimated. Furthermore, a swing angle between an internal voltage of the source end generator and an internal voltage of the receiving end generator as a function of obtained voltage phasor, current phasor, mechanical rotor angle and the impedances is estimated. A power swing condition is then determined based on the estimated swing angle.
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Patent Agency Ranking
公开(公告)号：US20190067946A1
公开(公告)日：2019-02-28
申请号：US15688370
申请日：2017-08-28
Applicant: General Electric Company
Inventor： Yan Pan , William James Premerlani
Abstract: A method for short term load forecasting in a power grid includes obtaining historical data comprising power data, load data and weather data corresponding to time index data recorded from a location in a power distribution network of the power grid. The method further includes receiving power grid data comprising a plurality of power values, and a plurality of weather parameter values corresponding to a plurality of recent time instant values. The method also includes generating modified historical data using statistical techniques to rectify error conditions. The method further includes estimating one or more power values at a future time instant based on the modified historical data and the power grid data. The method also includes balancing load of the power distribution network based on the estimated one or more power values.
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公开(公告)号：US10024920B2
公开(公告)日：2018-07-17
申请号：US13968684
申请日：2013-08-16
Applicant: General Electric Company
Inventor： Yan Pan , William James Premerlani
Abstract: In accordance with one embodiment, a method for detection of power swing for at least a first range of swing angles between an internal voltage (ES) of a source-end generator and an internal voltage (ER) of a receiving-end generator is provided. The method includes obtaining a voltage magnitude (VS) of the source-end generator, and a current magnitude (IS) of the source-end generator. The method further includes estimating a total reactance (X) between the source-end generator and the receiving-end generator, and estimating a first swing angle (θ) between the ES and the ER as a function of the obtained VS, the obtained IS and the estimated X. The method further includes detecting a power swing condition based on the estimated θ.
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公开(公告)号：US09847647B2
公开(公告)日：2017-12-19
申请号：US14877345
申请日：2015-10-07
Applicant: GENERAL ELECTRIC COMPANY
Inventor： William James Premerlani , Patrick Hammel Hart , Maozhong Gong
Abstract: A solar power conversion system includes a photovoltaic array having photovoltaic modules for generating direct current (DC) power. A power converter is provided in the system for converting the DC power to alternating current (AC) power. A transformer is coupled between the power converter and a power grid for transmitting the AC power to the power grid. The transformer is connected to the power grid at the point of common coupling (PCC) and to the power converter at output terminals. A reactance estimation module is provided in the system for estimating a short circuit reactance at PCC based on a small change in a measured voltage at output terminals with respect to a small change in a measured reactive power at the output terminals. Further, a maximum reactive power estimation module estimates a maximum reactive power based on the estimated reactance, the measured voltage at output terminals, and the measured reactive power at the output terminals. A controller in the system generates switching command signals for the power converter based on the measured voltage at output terminals and the estimated maximum reactive power.
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公开(公告)号：US20170104334A1
公开(公告)日：2017-04-13
申请号：US14877345
申请日：2015-10-07
Applicant: GENERAL ELECTRIC COMPANY
Inventor： William James Premerlani , Patrick Hammel Hart , Maozhong Gong
Abstract: A solar power conversion system includes a photovoltaic array having photovoltaic modules for generating direct current (DC) power. A power converter is provided in the system for converting the DC power to alternating current (AC) power. A transformer is coupled between the power converter and a power grid for transmitting the AC power to the power grid. The transformer is connected to the power grid at the point of common coupling (PCC) and to the power converter at output terminals. A reactance estimation module is provided in the system for estimating a short circuit reactance at PCC based on a small change in a measured voltage at output terminals with respect to a small change in a measured reactive power at the output terminals. Further, a maximum reactive power estimation module estimates a maximum reactive power based on the estimated reactance, the measured voltage at output terminals, and the measured reactive power at the output terminals. A controller in the system generates switching command signals for the power converter based on the measured voltage at output terminals and the estimated maximum reactive power.
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公开(公告)号：US20170104333A1
公开(公告)日：2017-04-13
申请号：US14877275
申请日：2015-10-07
Applicant: GENERAL ELECTRIC COMPANY
Inventor： William James Premerlani , Patrick Hammel Hart
CPC classification number: H02J3/383 , H02J3/16 , H02J2003/007 , H02M7/44 , Y02E10/563 , Y02E40/34 , Y02E60/76 , Y04S40/22
Abstract: A solar power conversion system includes a photovoltaic array having photovoltaic modules for generating direct current (DC) power. A power converter in the system converts the DC power to alternating current (AC) power. The AC power is transmitted to the power grid via a transformer coupled between the power converter and the power grid. The transformer is connected to the power grid at the point of common coupling (PCC) and to the power converter at output terminals. A voltage estimation module is configured to estimate a voltage at PCC based on a measured voltage magnitude, a measured real power and a measured reactive power at the output terminals, and a reactance of the transformer. A controller is provided in the system for generating switching command signals for the power converter based on the voltage at PCC.
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