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公开(公告)号：US12107422B2
公开(公告)日：2024-10-01
申请号：US18126724
申请日：2023-03-27
CPC分类号： H02J3/16 , G05B15/02 , H02J3/1828 , Y02E40/30
摘要： A method, apparatus, system and computer program is provided for optimizing and controlling volt-amperes reactive on an electrical control system. System-level and local-level measurements are determined and analyzed to prioritize and optimize which VAR adjusters are adjusted.
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公开(公告)号：US20190157867A1
公开(公告)日：2019-05-23
申请号：US16260411
申请日：2019-01-29
申请人： SunPower Corporation
发明人： Gregory Kern
CPC分类号： H02J3/18 , H02J3/1835 , H02J3/28 , H02J3/30 , H02J3/32 , H02J3/382 , H02J7/0031 , H02J7/0045 , H02J7/007 , H02J13/0006 , H02J2007/0039 , Y02B90/222 , Y02E40/30 , Y02E60/16 , Y02E70/30 , Y04S20/12
摘要： A distributed energy resource (DER) may store electrical power from an AC circuit and discharge stored electrical power to the AC circuit. A DER may be coupled to the AC circuit via a plug inserted into a receptacle coupled to the AC circuit, and a load device may be plugged into the DER via a receptacle of the DER. The DER may pass AC power from the AC circuit to the load device, and may draw additional power from the AC circuit to charge an energy storage circuit of the DER. The DER may also discharge stored energy into the AC circuit and/or power the load device directly.
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3.发明授权公开(公告)号：US10079490B2
公开(公告)日：2018-09-18
申请号：US14835144
申请日：2015-08-25
申请人： Tsinghua University
发明人： Qinglai Guo , Hongbin Sun , Bin Wang , Boming Zhang , Wenchuan Wu , Tao Niu
CPC分类号： H02J3/12 , H02J3/18 , H02J3/386 , Y02E10/763 , Y02E40/30
摘要： Disclosed are a method and a device for determining safe threshold for power grid voltage of a wind farm converging area, The method includes: obtaining ground state voltage; obtaining upper and lower limit voltage of the output bus, first lower and upper limit of reactive powers of fans and compensation devices, and lower and upper limit of active power fluctuations; obtaining second lower and upper limit of reactive powers of fans and compensation devices; determining whether voltage error is greater than a predetermined threshold; replacing the first lower and upper limit of the reactive powers of fans and the reactive powers of compensation devices with the second lower and upper limit of reactive powers of fans and compensation devices respectively, and repeating above steps if the voltage error is greater than the predetermined threshold, else defining the upper and lower limit voltage of the output bus as a safe threshold.
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公开(公告)号：US10075016B2
公开(公告)日：2018-09-11
申请号：US13475424
申请日：2012-05-18
CPC分类号： H02J13/0079 , H02J3/01 , H02J3/18 , Y02E40/30 , Y02E40/40 , Y02E40/74 , Y04S10/22 , Y10T307/305
摘要： Systems and methods for governing a signal waveform of a signal flowing through a component of a power transmission system that includes a plurality of switch-mode power processors and may be a polyphase system. At least one of current and voltage is integrally monitored at each of a plurality of locations on the power system and is characterized relative to specified constraints. When a monitored voltage or current is outside of the specified constraints, the voltage or current is modified by changing at least one of the time delay or phase characteristics of at least one of the source, load and transmission elements on the power transmission system.
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5.发明授权公开(公告)号：US10056756B2
公开(公告)日：2018-08-21
申请号：US15555079
申请日：2016-03-01
CPC分类号： H02J3/1828 , H04B3/54 , H04B3/542 , H04B3/546 , H04B2203/5416 , H04B2203/5491 , Y02E40/30
摘要： Audio Frequency Load Control (AFLC) signal processing electronics added to a power factor correction (PFC) unit allowing the AFLC system to operate without the need of large and heavy passive bypass or blocking filters at the PFC installations. The AFLC signal processing electronics a first group of additional electronics tuned to the AFLC frequency for detecting the AFLC carrier signal; and a second group of additional electronics for driving an AFLC impedance switch that is connected in parallel with an AFLC impedance. The AFLC impedance is connected in series with the PFC capacitors, and is sufficiently large to offer significant impedance in series with the PFC capacitors that allows the AFLC signal to bypass the PFC unit.
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公开(公告)号：US09912161B2
公开(公告)日：2018-03-06
申请号：US15160882
申请日：2016-05-20
申请人： SunPower Corporation
发明人： Seshadri Sivakumar , Jiyong Lian
摘要： A photovoltaic power plant includes solar cells and inverters that convert direct current generated by the solar cells to alternating current. The reactive powers generated by the inverters are based on a reactive power generated by a virtual inverter. The virtual inverter has an equivalent impedance representing the impedances of the inverters in the photovoltaic power plant. The reactive power setpoints of the inverters may be received from a local interpreter. The local interpreter may generate the reactive power setpoints from a global reactive power setpoint generated by a grid controller.
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7.发明申请公开(公告)号：US20180041034A1
公开(公告)日：2018-02-08
申请号：US15555079
申请日：2016-03-01
CPC分类号： H02J3/1828 , H04B3/54 , H04B3/542 , H04B3/546 , H04B2203/5416 , H04B2203/5491 , Y02E40/30
摘要： Audio Frequency Load Control (AFLC) signal processing electronics added to a power factor correction (PFC) unit allowing the AFLC system to operate without the need of large and heavy passive bypass or blocking filters at the PFC installations. The AFLC signal processing electronics a first group of additional electronics tuned to the AFLC frequency for detecting the AFLC carrier signal; and a second group of additional electronics for driving an AFLC impedance switch that is connected in parallel with an AFLC impedance. The AFLC impedance is connected in series with the PFC capacitors, and is sufficiently large to offer significant impedance in series with the PFC capacitors that allows the AFLC signal to bypass the PFC unit.
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公开(公告)号：US20180013287A1
公开(公告)日：2018-01-11
申请号：US15644262
申请日：2017-07-07
IPC分类号： H02J3/18 , G05B19/042
CPC分类号： H02J3/1828 , G05B19/042 , G05B2219/2639 , Y02E40/30
摘要： In one embodiment, a computing device determines real and reactive power flows at a transformer at a given time, and computes, based on the real power and reactive power flow at the transformer, an amount of reactive power adjustment to produce a desired voltage differential across the transformer. The computing device may then adjust the reactive power flow from a secondary side of the transformer at substantially the given time based on the computed amount.
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公开(公告)号：US20180003751A1
公开(公告)日：2018-01-04
申请号：US15199293
申请日：2016-06-30
IPC分类号： G01R27/26 , G08C23/06 , G08C23/04 , H04B10/071 , G08B21/18
CPC分类号： G01R27/2605 , G01R31/028 , G01R31/3689 , G08B21/182 , G08C23/04 , G08C23/06 , H01G9/14 , H02H7/16 , H02J3/18 , H04B10/071 , Y02E40/30
摘要： A monitoring system includes a capacitor can having one or more capacitors. The monitoring system includes an antenna. The monitoring system includes at least one sensor disposed within the capacitor can and configured to detect an operating characteristic associated with health of the one or more capacitors of the capacitor can. The monitoring system includes a processor configured to receive a first signal from the at least one sensor indicative of the operating characteristic. The processor is configured to send a second signal, via the antenna, indicative of a value of the operating characteristic to a receiving device outside of the capacitor can.
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公开(公告)号：US20170366007A1
公开(公告)日：2017-12-21
申请号：US15524951
申请日：2015-11-25
发明人： Stefan ABELEN , Daniel PREISSLER , Audrius ILGEVICIUS , Karsten VIERECK , Tobias WAGNER , Tobias GRUBER
CPC分类号： H02J3/1878 , G01R19/06 , H02J3/46 , Y02E40/30
摘要： A method for controlling the parallel running of a plurality of transformers T1, T2, . . . , TN) in a parallel circuit (10) is disclosed, wherein each of the transformers (T1, T2, . . . , TN) is assigned a measuring/control device (12) and all the measuring/control devices (12) are connected to one another via a communication connection (16). In the absence of a standby signal of at least one measuring/control device (12), interruption (16) of the communication (14) is displayed. The measured values determined at the time (t) of the interruption remain constant for the duration of the interruption (16) and are also included in the calculation of the control errors during the interruption (16), in order to minimise a circuit reactive current of the transformers (T1, T2, . . . , TN).
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