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公开(公告)号：US20140191589A1
公开(公告)日：2014-07-10
申请号：US14205606
申请日：2014-03-12
Applicant: SMA Solar Technology AG
Inventor： Jens Friebe , Sebastian Bieniek
CPC classification number: H01H9/54 , H01L31/02021 , H02H3/08 , H02H3/20 , Y02E10/50 , Y10T307/826 , Y10T307/858 , Y10T307/865
Abstract: The disclosure relates to a safety device for a photovoltaic system for feeding into a power supply system, that includes at least one input for connection to a PV generator, at least one output for connection to an inverter, and a switching element for de-energizing the at least one output. The safety device includes an evaluating unit configured to switch the switching element based on a low-frequency signal at the at least one output. The disclosure also relates to a method for operating such a safety device.
Abstract translation: 本公开涉及用于馈送到电源系统的光伏系统的安全装置，其包括用于连接到PV发电机的至少一个输入端，用于连接到逆变器的至少一个输出端和用于断电的开关元件 至少一个输出。 安全装置包括：评估单元，被配置为基于所述至少一个输出处的低频信号来切换开关元件。 本公开还涉及一种用于操作这种安全装置的方法。
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公开(公告)号：US09768610B2
公开(公告)日：2017-09-19
申请号：US14997740
申请日：2016-01-18
Applicant: SMA Solar Technology AG
Inventor： Sebastian Bieniek , Markus Hopf
CPC classification number: H02H9/02 , G01R19/10 , H01L31/02021 , H02H3/17 , H02H3/337 , H02M7/42 , H02S40/32 , H02S50/00 , Y02E10/50
Abstract: A method for leakage current compensation in a photovoltaic system includes determining a reference current flowing from at least one current-carrying line under voltage via a capacitor to earth, and generating a compensation current, having a phase and a frequency of the reference current, and having an amplitude adjusted by a negative scaling factor based on the reference current. The method further includes determining a current sum using a differential current sensor for at least a portion thereof, wherein the addends of the current sum are the currents through a complete set of current-carrying lines and the compensation current, minimizing the determined current sum by adjusting the scaling factor, and routing the compensation current through at least one other differential current sensor, such that the compensation current compensates a leakage current component of a differential current monitored by the other differential current sensor. A related device and system is also disclosed.
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公开(公告)号：US09625516B2
公开(公告)日：2017-04-18
申请号：US13729234
申请日：2012-12-28
Applicant: SMA Solar Technology AG
Inventor： Markus Hopf , Holger Behrends , Gerd Bettenwort , Sebastian Bieniek , Marcel Kratochvil
CPC classification number: G01R31/2642 , G08B13/1409 , H02S50/10
Abstract: A device and corresponding method for monitoring a photovoltaic system to detect an occurrence of events impairing normal operation of the photovoltaic system is provide. The photovoltaic system includes a photovoltaic generator including a first group of photovoltaic modules and a second group of photovoltaic modules being different from the first group. The device includes a first and a second pair of coupling means, both pairs including signal coupling-in means for coupling a test signal into the photovoltaic generator, and a signal coupling-out means for coupling out a response signal from the photovoltaic generator, the first pair of coupling means configured to selectively detect the occurrence of the events in the first group of photovoltaic modules, and the second pair of coupling means configured to selectively detect the occurrence of the events in the second group of photovoltaic modules.
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公开(公告)号：US09709623B2
公开(公告)日：2017-07-18
申请号：US13741534
申请日：2013-01-15
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Sebastian Bieniek , Holger Behrends , Markus Hopf
CPC classification number: G01R31/2637 , H01L31/02021 , H02S50/10 , Y02E10/50
Abstract: The apparatus for monitoring a photovoltaic system includes an incoupling circuit configured to couple an AC voltage test signal into the photovoltaic system, and an outcoupling circuit configured to outcouple a response signal, which is associated with the test signal, from the photovoltaic system, and an evaluation device, which is connected to the outcoupling circuit. The evaluation device is configured to identify events which adversely affect correct operation of the photovoltaic system. The apparatus is distinguished in that the outcoupling circuit includes a first transformer and a second transformer, each having a respective primary winding and each having a respective secondary winding which is connected to the evaluation device, with the primary windings of the first and second transformers being arranged in different electrical lines between a generator and an inverter in the photovoltaic system. The disclosure also relates to a corresponding method for monitoring a photovoltaic system.
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5.发明授权Method and system for detecting an arc fault in a photovoltaic power system 有权用于检测光伏电力系统中的电弧故障的方法和系统公开(公告)号：US09046588B2
公开(公告)日：2015-06-02
申请号：US14105377
申请日：2013-12-13
Applicant: SMA Solar Technology AG
Inventor： Holger Behrends , Sebastian Bieniek , Thorsten Buelo , Markus Hopf , Gerd Bettenwort , Marcel Kratochvil , Christopher Merz , Oliver Prior
CPC classification number: G01R31/40 , H01L31/02021 , H02H1/0015 , H02H7/20 , H02S50/10 , Y02E10/50
Abstract: A method for detecting an arc fault in a photovoltaic power circuit includes operating a photovoltaic generator at a first working point. A first signal related to a DC-current and/or a DC-voltage in the power circuit is determined. The first signal is analyzed and it is determined whether the signal indicates the presence of an electric arc in the power circuit. If so, the photovoltaic generator is operated at a second working point and a second signal related to the DC-current and/or the DC-voltage is determined. The first and second signals are then compared; and the occurrence of an arc fault in the power circuit is selectively signaled based on the comparison.
Abstract translation: 一种用于检测光伏电力电路中的电弧故障的方法包括在第一工作点处操作光伏发电机。 确定与电源电路中的直流电流和/或直流电压有关的第一信号。 对第一信号进行分析，确定信号是否指示电源电路中存在电弧。 如果是这样，则光伏发电机在第二工作点运行，并且确定与DC电流和/或DC电压相关的第二信号。 然后比较第一和第二信号; 并且基于该比较选择性地发信号通知电力电路中的电弧故障。
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Patent Agency Ranking
公开(公告)号：US20140062500A1
公开(公告)日：2014-03-06
申请号：US14074235
申请日：2013-11-07
Applicant: SMA Solar Technology AG
Inventor： Holger Behrends , Marcel Kratochvil , Markus Hopf , Sebastian Bieniek
IPC: G01R31/02
CPC classification number: G01R31/02 , G01R31/024 , H02H1/0015 , H02H1/003 , H02S50/10
Abstract: A method of detecting an arc fault in a power circuit includes injecting an AC-signal into the power circuit and measuring a response signal that is related to the injected AC-signal in the power circuit. The method further includes determining a frequency response of the power circuit from the response signal, analyzing the frequency response, and identifying a preferred frequency. A signal related to AC-current flowing in the power circuit within the preferred frequency range is measured and an occurrence of an arc fault in the power circuit is signaled depending on the measured signal. A system for detecting an arc fault is designed to perform a method as described before.
Abstract translation: 一种检测电力电路中的电弧故障的方法包括将AC信号注入电源电路并测量与电源电路中注入的AC信号相关的响应信号。 该方法还包括根据响应信号确定电源电路的频率响应，分析频率响应以及识别优选频率。 测量在优选频率范围内在电力电路中流动的AC电流的信号，并根据测量信号发出电源电路中的电弧故障的发生。 设计用于检测电弧故障的系统来执行如前所述的方法。
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公开(公告)号：US20130141133A1
公开(公告)日：2013-06-06
申请号：US13741534
申请日：2013-01-15
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Sebastian Bieniek , Holger Behrends , Markus Hopf
IPC: G01R31/26
CPC classification number: G01R31/2637 , H01L31/02021 , H02S50/10 , Y02E10/50
Abstract: The apparatus for monitoring a photovoltaic system includes an incoupling circuit configured to couple an AC voltage test signal into the photovoltaic system, and an outcoupling circuit configured to outcouple a response signal, which is associated with the test signal, from the photovoltaic system, and an evaluation device, which is connected to the outcoupling circuit. The evaluation device is configured to identify events which adversely affect correct operation of the photovoltaic system. The apparatus is distinguished in that the outcoupling circuit includes a first transformer and a second transformer, each having a respective primary winding and each having a respective secondary winding which is connected to the evaluation device, with the primary windings of the first and second transformers being arranged in different electrical lines between a generator and an inverter in the photovoltaic system. The disclosure also relates to a corresponding method for monitoring a photovoltaic system.
Abstract translation: 用于监测光伏系统的装置包括配置成将AC电压测试信号耦合到光伏系统中的耦合电路，以及配置成从光伏系统外耦合与测试信号相关联的响应信号的输出耦合电路，以及 评估装置，其连接到输出电路。 评估装置被配置为识别对光伏系统的正确操作产生不利影响的事件。 该装置的特征在于，输出耦合电路包括第一变压器和第二变压器，每个变压器和第二变压器各自具有相应的初级绕组，并且每个都具有连接到评估装置的相应次级绕组，第一和第二变压器的初级绕组为 布置在发电机和光伏系统中的逆变器之间的不同电线中。 本公开还涉及用于监测光伏系统的相应方法。
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公开(公告)号：US09865411B2
公开(公告)日：2018-01-09
申请号：US14205606
申请日：2014-03-12
Applicant: SMA Solar Technology AG
Inventor： Jens Friebe , Sebastian Bieniek
CPC classification number: H01H9/54 , H01L31/02021 , H02H3/08 , H02H3/20 , Y02E10/50 , Y10T307/826 , Y10T307/858 , Y10T307/865
Abstract: The disclosure relates to a safety device for a photovoltaic system for feeding into a power supply system, that includes at least one input for connection to a PV generator, at least one output for connection to an inverter, and a switching element for de-energizing the at least one output. The safety device includes an evaluating unit configured to switch the switching element based on a low-frequency signal at the at least one output. The disclosure also relates to a method for operating such a safety device.
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9.发明授权Method and system for detecting an arc fault in a power circuit using frequency response 有权使用频率响应检测电源电路中的电弧故障的方法和系统公开(公告)号：US09535104B2
公开(公告)日：2017-01-03
申请号：US14074235
申请日：2013-11-07
Applicant: SMA Solar Technology AG
Inventor： Holger Behrends , Marcel Kratochvil , Markus Hopf , Sebastian Bieniek
CPC classification number: G01R31/02 , G01R31/024 , H02H1/0015 , H02H1/003 , H02S50/10
Abstract: A method of detecting an arc fault in a power circuit includes injecting an AC-signal into the power circuit and measuring a response signal that is related to the injected AC-signal in the power circuit. The method further includes determining a frequency response of the power circuit from the response signal, analyzing the frequency response, and identifying a preferred frequency. A signal related to AC-current flowing in the power circuit within the preferred frequency range is measured and an occurrence of an arc fault in the power circuit is signaled depending on the measured signal. A system for detecting an arc fault is designed to perform a method as described before.
Abstract translation: 一种检测电力电路中的电弧故障的方法包括将AC信号注入电源电路并测量与电源电路中注入的AC信号相关的响应信号。 该方法还包括根据响应信号确定电源电路的频率响应，分析频率响应以及识别优选频率。 测量在优选频率范围内在电力电路中流动的AC电流的信号，并根据测量信号发出电源电路中的电弧故障的发生。 设计用于检测电弧故障的系统来执行如前所述的方法。
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10.发明申请公开(公告)号：US20160134102A1
公开(公告)日：2016-05-12
申请号：US14997740
申请日：2016-01-18
Applicant: SMA Solar Technology AG
Inventor： Sebastian Bieniek , Markus Hopf
CPC classification number: H02H9/02 , G01R19/10 , H01L31/02021 , H02H3/17 , H02H3/337 , H02M7/42 , H02S40/32 , H02S50/00 , Y02E10/50
Abstract: A method for leakage current compensation in a photovoltaic system includes determining a reference current flowing from at least one current-carrying line under voltage via a capacitor to earth, and generating a compensation current, having a phase and a frequency of the reference current, and having an amplitude adjusted by a negative scaling factor based on the reference current. The method further includes determining a current sum using a differential current sensor for at least a portion thereof, wherein the addends of the current sum are the currents through a complete set of current-carrying lines and the compensation current, minimizing the determined current sum by adjusting the scaling factor, and routing the compensation current through at least one other differential current sensor, such that the compensation current compensates a leakage current component of a differential current monitored by the other differential current sensor. A related device and system is also disclosed.
Abstract translation: 一种用于光伏系统中的漏电流补偿的方法，包括：从至少一个通过电容器的载流线路流向基准电流的基准电流，并产生具有参考电流的相位和频率的补偿电流;以及 具有基于参考电流的负缩放因子调整的幅度。 该方法还包括使用其至少一部分的差分电流传感器来确定电流和，其中电流和的总和是通过一组完整的载流线和补偿电流的电流，使得所确定的电流和最小化 调整比例因子，以及通过至少一个其它差分电流传感器布置补偿电流，使得补偿电流补偿由另一差动电流传感器监测的差动电流的漏电流分量。 还公开了一种相关的装置和系统。
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