公开(公告)号：US09837822B2

公开(公告)日：2017-12-05

申请号：US14814292

申请日：2015-07-30

申请人： LSIS CO., LTD.

发明人： Byung Kwan Kang ,  Chung Woo Lee

IPC分类号： H02J7/00 ,  H02J3/32 ,  H02J3/18

CPC分类号： H02J3/32 ,  H02J3/18 ,  Y02E40/30

摘要： A control device of an energy storage system is provided. The control device includes a voltage calculation unit calculating the difference between a reference voltage and a measured voltage; frequency calculation unit calculating the difference between a reference frequency and a measured frequency; a power reserve margin (PRM) calculating a ratio of reserve power to the maximum consumption of power; and a power calculation unit using, as input values, coefficients calculated at the voltage calculation unit, the frequency calculation unit and the PRM calculation unit, and calculating a switch control value of an energy storage system by further using a difference in reactive power and active power.

公开(公告)号：US09812949B2

公开(公告)日：2017-11-07

申请号：US14050959

申请日：2013-10-10

申请人： Andrew Stephen Hintz

发明人： Andrew Stephen Hintz

IPC分类号： H02M1/42 ,  H02J3/28 ,  H02J3/18 ,  H02M7/5387 ,  H02M7/797 ,  H02J3/26 ,  H02J3/38 ,  H02J7/34 ,  H02J7/35 ,  H02M3/04 ,  H02M1/00

CPC分类号： H02M1/42 ,  H02J3/18 ,  H02J3/26 ,  H02J3/28 ,  H02J3/382 ,  H02J7/345 ,  H02J7/35 ,  H02M3/04 ,  H02M7/53875 ,  H02M7/797 ,  H02M2001/007 ,  Y02B70/12 ,  Y02E40/30 ,  Y02E40/50

摘要： A converter system and inverter system are disclosed with individual real and reactive power control for each phase of a poly-phase system. The converter system includes a controller, bidirectional single-phase inverters with AC sides coupled to an AC line filter and DC sides connected in parallel to a link capacitor coupled to DC/DC converters. Each inverter handles a separate AC phase. The controller controls the inverters and DC/DC converters so the current amplitude of each AC phase is independent, and the phase difference of each AC phase is independent. The inverters can be galvanically isolated between the DC and AC sides. The inverters can be non-isolated inverters having line and neutral connectors coupled to an isolated transformer winding, and the output windings of the transformer can be wired in a Wye configuration. The inverters can have local controllers.

公开(公告)号：US09762061B2

公开(公告)日：2017-09-12

申请号：US14318020

申请日：2014-06-27

申请人： Ove Boe ,  Espen Haugan

发明人： Ove Boe ,  Espen Haugan

IPC分类号： H02J3/22 ,  H02J3/18 ,  H02J3/34

CPC分类号： H02J3/22 ,  H02J3/1821 ,  H02J3/1828 ,  H02J3/34 ,  Y02E40/30

摘要： Methods for transferring electrical power in the sea include: generating AC power; and guiding, at least partially underwater, the AC power through a cable from a first end of the cable to a second end of the cable. A first reactor is connected near the first end of the cable and a second reactor is connected near the second end of the cable. Inductances of the first reactor and the second reactor are selected to at least partially compensate for reactive power generated in the cable.

公开(公告)号：US20170256947A1

公开(公告)日：2017-09-07

申请号：US15059421

申请日：2016-03-03

申请人： COOPER TECHNOLOGIES COMPANY

发明人： Dongbo Zhao ,  Yigang Wang ,  Chinmaya Baburao Patil

IPC分类号： H02J3/38

CPC分类号： H02J3/382 ,  H02J3/04 ,  H02J3/18 ,  H02J13/0006 ,  Y02E40/30 ,  Y02E40/72 ,  Y02E60/74 ,  Y04S10/123 ,  Y04S10/30

摘要： A method of operating an electrical feeder permits the electrical feeder voltage to be maintained at the minimum voltage within a voltage range based upon dynamic grouping together of electrical generators on the electrical feeder with demand response loads on the electrical feeder. A method of assessing the proper operation of a voltage control device on the electrical feeder involves detecting a number of properties of the electrical power in the electrical feeder both prior to and subsequent to a change in an operational parameter of a voltage control device. An expected effect upon the electrical feeder of one or more distributed generators is filtered from this in order to determine a net effect of the voltage control device itself on the electrical feeder. Based upon the detected net effect and a predicted baseline effect for the voltage control device, it can be determined whether the voltage control device is functioning properly.

公开(公告)号：US20170256944A1

公开(公告)日：2017-09-07

申请号：US15474715

申请日：2017-03-30

申请人： Shu Yuen Ron HUI ,  Chi Kwan LEE ,  Felix Fulih WU

发明人： Shu Yuen Ron HUI ,  Chi Kwan LEE ,  Felix Fulih WU

IPC分类号： H02J3/18 ,  H02J3/24

CPC分类号： H02J3/18 ,  H02J3/1814 ,  H02J3/1842 ,  H02J3/24 ,  Y02E40/18 ,  Y02E40/22 ,  Y02E40/30

摘要： The present invention provides a power control circuit connectable to a load adapted to receive a power supply, the power control circuit adapted to absorb power from the power supply and adapted to deliver power to the power supply to stabilize at least one electrical parameter of the power supply. The present invention also provides an associated method of stabilizing at least one electrical parameter of a power supply connectable to a load, the method including absorbing power from the power supply or delivering power to the power supply. The at least one electrical parameter of the power supply includes parameters such as voltage and frequency.

公开(公告)号：US09728967B2

公开(公告)日：2017-08-08

申请号：US14223578

申请日：2014-03-24

申请人： Curtis A Birnbach

发明人： Curtis A Birnbach

IPC分类号： H02J3/18

CPC分类号： H02J3/1828 ,  Y02E40/30 ,  Y02P80/112

摘要： A combination includes an AC power system and a system for improving power factor in the AC power system by continuously variable, analog control of level of reactive current introduced into a power conveying line of the AC power system. A power factor-improving circuit includes at least one channel that comprises a channel-level AC electron tube circuit and at least one associated reactive impedance element interconnected in series manner. Each of the channel-level AC electron tube circuit is responsive to a control system for continuously variable, analog control of the level of reactive current in the at least one associated reactive impedance element so that the foregoing level of reactive current changes, as necessary, in a continuously variable, analog manner to improve power factor in the power conveying line. Each of the channel-level AC electron tube circuit comprises at least one cold-cathode field-emission electron tube.

公开(公告)号：US20170214250A1

公开(公告)日：2017-07-27

申请号：US15412417

申请日：2017-01-23

申请人： S&C Electric Company

发明人： Daniel H. Zietlow ,  William Yadusky ,  Benjamin M. Stocks

IPC分类号： H02J3/46 ,  H02J3/14 ,  H02J9/06 ,  H02J7/00 ,  H02J3/16 ,  H02J3/38

CPC分类号： H02J3/06 ,  H02J3/18 ,  H02J3/38 ,  H02J5/00 ,  H02J2003/143 ,  Y02B70/3266 ,  Y02E40/30 ,  Y04S20/242

摘要： Methods for energizing microgrids and microgrid energy distribution systems are provided. A method for energizing a microgrid includes energizing a storage management system (SMS) that is configured to control power distribution in the microgrid. The method further includes connecting a plurality of reactive components to the SMS based on a configuration control programmed into the SMS. The method yet further includes ramping up an output voltage of the SMS based on limiting inrush currents of the plurality of reactive components in the microgrid.

公开(公告)号：US09698602B2

公开(公告)日：2017-07-04

申请号：US15003973

申请日：2016-01-22

申请人： Jang Heon Lee

发明人： Jang Heon Lee

IPC分类号： G05F1/00 ,  H02M3/335 ,  H02J3/18 ,  H02J3/12

CPC分类号： H02J3/1878 ,  H02J3/12 ,  Y02E40/30

摘要： The present invention relates to an electric power control system and method therefor, and comprises a control unit 10 and a transformer 20 connected thereto. The control unit 10 detects varying input voltage in real-time, controls switching of triac devices equipped in the transformer, and applies control signal which switches triac device among a plurality of triac devices for target voltage output to the transformer 20. The transformer 20 outputs target voltage by switching tabs of triac devices according to control signal, supplies power by switching tabs of triac devices corresponding to target voltage included in control signal, and preventing EMF induced from primary coil to secondary coil by grounding the tabs of unused triac devices with N-phase for adjustment to the target voltage.

公开(公告)号：US09690313B2

公开(公告)日：2017-06-27

申请号：US14185509

申请日：2014-02-20

申请人： XSLENT Energy Technologies, LLC

发明人： Stefan Matan ,  William B Westbrock, Jr. ,  Fred C Horton ,  Joseph M Klemm ,  Frank P Marrone ,  Arnold F McKinley ,  Kurt W Wiseman

IPC分类号： H02M1/12 ,  G05F1/70 ,  H02J3/18 ,  H02M1/42 ,  H02M7/48 ,  H02J3/50 ,  G05B15/02 ,  H02M7/42

CPC分类号： G05F1/70 ,  G05B15/02 ,  H02J3/18 ,  H02J3/50 ,  H02M1/42 ,  H02M7/48 ,  Y02B70/12 ,  Y02E40/30

摘要： A power transfer system provides power factor conditioning of the generated power. Power is received from a local power source, converted to usable AC power, and the power factor is conditioned to a desired value. The desired value may be a power factor at or near unity, or the desired power factor may be in response to conditions of the power grid, a tariff established, and/or determinations made remotely to the local power source. Many sources and power transfer systems can be put together and controlled as a power source farm to deliver power to the grid having a specific power factor characteristic. The farm may be a grouping of multiple local customer premises. AC power can also be conditioned prior to use by an AC to DC power supply for more efficient DC power conversion.

公开(公告)号：US09619848B2

公开(公告)日：2017-04-11

申请号：US14270589

申请日：2014-05-06

申请人： SAS Institute Inc.

发明人： Arnulfo D. de Castro ,  Glenn Lampley ,  Xinmin Wu ,  Greg Link

IPC分类号： G05D3/12 ,  G06Q50/06 ,  H02J3/12 ,  H02J3/18 ,  H02J3/00

CPC分类号： G06Q50/06 ,  H02J3/12 ,  H02J3/1821 ,  H02J2003/003 ,  H02J2003/007 ,  Y02E40/30 ,  Y02E40/76 ,  Y02E60/76 ,  Y04S10/54 ,  Y04S10/545 ,  Y04S40/22

摘要： Techniques to determine settings for an electrical distribution network are described. Some embodiments are particularly directed to techniques to determine settings for an electrical distribution network using power flow heuristics. In one embodiment, for example, an apparatus may comprise a model reception component, a forecast component, and an optimization component. The model reception component may be operative to receive a model of an electrical distribution network having multiple capacitor banks and multiple voltage regulators, each of the multiple capacitor banks represented in the model by a model capacitor bank, each of the multiple voltage regulators represented in the model by a model voltage regulator, the electrical distribution network having a radial layout in which power flows from a source to multiple nodes in which each node is associated with one voltage regulator. The forecast reception component may be operative to receive a forecast for demand on the electrical distribution network. The optimization component may be operative to receive the model capacitor banks and model voltage regulators and determine one or more settings for the multiple capacitor banks and multiple voltage regulators that allow for providing power within predetermined limits while reducing power loss as compared to a power loss of the existing settings or reducing power usage as compared to a power usage of the existing settings, the one or more settings for the multiple voltage regulators determined according to a heuristic in which potential settings are iteratively determined for each of the model voltage regulators based on a least squares model of load flow analysis. Other embodiments are described and claimed.