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公开(公告)号：US11067638B2
公开(公告)日：2021-07-20
申请号：US16711578
申请日：2019-12-12
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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公开(公告)号：US20210181264A1
公开(公告)日：2021-06-17
申请号：US16711578
申请日：2019-12-12
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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公开(公告)号：US11808821B2
公开(公告)日：2023-11-07
申请号：US17989743
申请日：2022-11-18
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
CPC classification number: G01R31/40 , H02H1/0015
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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公开(公告)号：US20220360214A1
公开(公告)日：2022-11-10
申请号：US17865606
申请日：2022-07-15
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Rainer Schmitt , Torsten Otto , Sybille Pape
Abstract: The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δt1 and the power flow P is suppressed in an inactive time window with the second period Δt2. Via detection of an input current Iin flowing at the input and/or an input voltage Uin applied to the input and comparison of values of the input current Iin and/or input voltage Uin detected in the inactive time window with a current threshold value ITH or a voltage threshold value UTH an arc presence criterion is signaled if the input current Iin detected in the inactive time window falls below the current threshold value ITH and/or the input voltage Uin detected in the inactive time window does not exceed the voltage threshold value UTH. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.
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Patent Agency Ranking
公开(公告)号：US12132443B2
公开(公告)日：2024-10-29
申请号：US17865606
申请日：2022-07-15
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Rainer Schmitt , Torsten Otto , Sybille Pape
CPC classification number: H02S50/00 , G01R31/66 , H02J3/14 , H02J3/381 , H02S40/32 , H02S40/36 , H02J2300/24
Abstract: The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δt1 and the power flow P is suppressed in an inactive time window with the second period Δt2. Via detection of an input current Iin flowing at the input and/or an input voltage Uin applied to the input and comparison of values of the input current Iin and/or input voltage Uin detected in the inactive time window with a current threshold value ITH or a voltage threshold value UTH an arc presence criterion is signaled if the input current Iin detected in the inactive time window falls below the current threshold value ITH and/or the input voltage Uin detected in the inactive time window does not exceed the voltage threshold value UTH. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.
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公开(公告)号：US11567142B2
公开(公告)日：2023-01-31
申请号：US17375448
申请日：2021-07-14
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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公开(公告)号：US20230078605A1
公开(公告)日：2023-03-16
申请号：US17989743
申请日：2022-11-18
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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公开(公告)号：US20220365145A1
公开(公告)日：2022-11-17
申请号：US17865573
申请日：2022-07-15
Applicant: SMA Solar Technology AG
Inventor： Rainer Schmitt , Marcel Kratochvil , Sybille Pape
Abstract: The disclosure is directed to a method for detecting an arc in a direct-current circuit including a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow between the DC source and an output of the circuit arrangement is cyclically interrupted by a switching circuit, such that the power flow is enabled in an active time window with the first period Δt1 and the power flow is suppressed in an inactive time window with the second period Δt2. Detection of a current I characterizing the power flow P and/or a voltage U characterizing the power flow P in two consecutive active time windows and comparison of the detected values of current I and/or voltage U of the active time window with the corresponding detected values from the preceding active time window can signal an arc if these values of the active time window differ from the corresponding values of the preceding active time window by more than a threshold value. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter comprising such a circuit arrangement.
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公开(公告)号：US20210341543A1
公开(公告)日：2021-11-04
申请号：US17375448
申请日：2021-07-14
Applicant: SMA Solar Technology AG
Inventor： Marcel Kratochvil , Raimund Thiel , Rainer Schmitt
Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.
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